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Tytuł:
Examination of thermal work of electric chamber furnace to thermal processing
Autorzy:
Kowalik-Wolska, M
Boryca, J.
Powiązania:
https://bibliotekanauki.pl/articles/102130.pdf
Data publikacji:
2015
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
heat treatment
heating costs
heat consumption
Opis:
The improvement of effectiveness of work furnaces depends on increasing the efficiency as well as the decrease the elementary consumption of energy. The character of the analyzed electric chamber furnace to thermal processing in work was introduced. over the discussed results concern the efficiencies, consumption of electric energy as well as the coefficient of elementary consumption of energy. The improvement of coefficients of furnace solutions were proposed.
Źródło:
Advances in Science and Technology. Research Journal; 2015, 9, 27; 11-16
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the wire electrical discharge machinability of roots of steam turbine blades
Autorzy:
Poroś, D.
Zaborski, S.
Powiązania:
https://bibliotekanauki.pl/articles/99583.pdf
Data publikacji:
2010
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
turbine blades
heat treatment
WEDM
Opis:
This paper presents method for the unconventional machining of the blades of steam turbines. Blade material as steel X12Cr13 was chosen into the investigation. Blade failures in gas turbine engines often lead to loss of all downstream stages and can have a dramatic effect on the availability of the turbine engines.. Conventional machining of the roots of steam turbine blades causes high temperature and rapid wear of tool which makes machining expensive WEDM is currently regarded among the most popular non-conventional machining. WEDM allows treatment of hard, brittle materials and composite, irrespective of their structure (thin-wall components) and mechanical properties. Submitted work is an analysis of potential impact on the received thickness of heat affected zone by appropriate heat treatment of material prior to WEDM. Such action is intended to eliminate or reduce the initiating impact of any microcracks on the formation of surface defects on the turbine blades roots during operation. The aim of the article is to replace the traditional methods of machining the blades roots by WEDM and thus the elimination of problems such as the need to monitor the tool wear. The presented experimental study was carried out on a modern wire EDM Sodick AQ327L. Investigated were the effects of WEDM of X12Cr13 steel as the Heat Affected Zone, the micro-fractures and surface roughness parameters.
Źródło:
Journal of Machine Engineering; 2010, 10, 1; 70-77
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
High Versatility of Niobium Alloyed AHSS
Autorzy:
Kučerová, L.
Opatová, K.
Káňa, J.
Jirková, H.
Powiązania:
https://bibliotekanauki.pl/articles/958202.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
TRIP steel
niobium
heat treatment
thermomechanical treatment
Opis:
The effect of processing parameters on the final microstructure and properties of advanced high strength CMnSiNb steel was investigated. Several processing strategies with various numbers of deformation steps and various cooling schedules were carried out, namely heat treatment without deformation, conventional quenching and TRIP steel processing with bainitic hold or continuous cooling. Obtained multiphase microstructures consisted of the mixture of ferrite, bainite, retained austenite and M-A constituent. They possessed ultimate tensile strength in the range of 780-970 MPa with high ductility A5 mm above 30%. Volume fraction of retained austenite was for all the samples around 13%. The only exception was reference quenched sample with the highest strength 1186 MPa, lowest ductility A5 mm = 20% and only 4% of retained austenite.
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 3; 1485-1491
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of possibility of repairing welding of selected of the steam turbines
Autorzy:
Wieczorska, Agata
Bujko, Adrian
Powiązania:
https://bibliotekanauki.pl/articles/244945.pdf
Data publikacji:
2019
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
regenerative heat treatment
welding
steam turbine
Opis:
The article presents the results of the study on the possibilities of repair by welding methods of exploitation steam turbine bodies. Two hull were investigation after a lifetime of more than 200.000 hours. Repair welding study were carried out on the L17HMF cast steel body in the immediately after exploitation condition, whereas the L21HMF cast steel body underwent a revitalization after the exploitation, and then the welding repair research were performed. On the material taken from the L17HMF cast steel hull, welding repairs were made by welding the previously cut four grooves measuring 200 mm 50 mm 50 mm, which were simulations of material defected. All samples were made in areas where maximum steam temperatures were operating. Welds were tested with destructive and non-destructive methods to determine their quality and define non-compliances detected. The L21HMF cast steel was subjected to a revitalization process, which consisted the hull in subjecting heat treatment in order to obtain favourable structural changes and improve the strength properties. Non-destructive examinations and hardness tests were carried out on the remedial weld, indicating the required quality of repairing remedial weld. Comparative study is aimed at demonstrating the main welding problems during the repair welding of exploitation steam turbine hulls.
Źródło:
Journal of KONES; 2019, 26, 4; 265-271
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fatigue strength of screw joints at loading variable
Autorzy:
Nieoczym, A.
Gardyński, L.
Krzysiak, Z.
Bartnik, G.
Samociuk, W.
Beer-Lech, K.
Powiązania:
https://bibliotekanauki.pl/articles/1396459.pdf
Data publikacji:
2015
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
screw joints
fatigue strength
heat treatment
Opis:
In the article was described an influence of the construction of screw joint on the strength at loading variable. Relation of the type of material of the bolt was described to strength from the technology of making thread. Presented findings of cracking of double – nutted bolts at low – cycles loading.
Źródło:
Advanced Technologies in Mechanics; 2015, 2, no. 2 (3); 28-36
2392-0327
Pojawia się w:
Advanced Technologies in Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Laser heat treatment of nickel-based alloys – a review
Autorzy:
Kukliński, Mateusz
Szymański, Michał
Przestacki, Damian
Powiązania:
https://bibliotekanauki.pl/articles/94176.pdf
Data publikacji:
2019
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
nickel
laser
heat treatment
surface
coating
Opis:
In this paper researches which focus on laser heat treatment of nickel-based alloys are reviewed. Studies published from 1970s until today are taken into consideration. Publications which focus on influence of laser thermal processing on surface layer condition both on solid materials and predeposited coatings are described. Laser technologies in which additional materials are delivered during the process are not considered. In order to focus on studies investigating microstructural changes resulting mainly from material remelting, laser shock processing is also disregarded.
Źródło:
Archives of Mechanical Technology and Materials; 2019, 39; 46-53
2450-9469
Pojawia się w:
Archives of Mechanical Technology and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Calculation of Critical Temperatures by Empirical Formulae
Autorzy:
Trzaska, J.
Powiązania:
https://bibliotekanauki.pl/articles/355194.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
CCT diagram
modeling
heat treatment
steel
Opis:
The paper presents formulas used to calculate critical temperatures of structural steels. Equations that allow calculating temperatures Ac1, Ac3, Ms and Bs were elaborated based on the chemical composition of steel. To elaborate the equations the multiple regression method was used. Particular attention was paid to the collection of experimental data which was required to calculate regression coefficients, including preparation of data for calculation. The empirical data set included more than 500 chemical compositions of structural steel and has been prepared based on information available in literature on the subject.
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 2B; 981-986
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Precipitation Processes and Mechanical Properties of Aged Inconel 718 Alloy after Annealing
Autorzy:
Maj, P.
Adamczyk-Cieślak, B.
Slesik, M.
Mizera, J.
Pieja, T.
Sieniawski, J.
Gancarczyk, T.
Dudek, S.
Powiązania:
https://bibliotekanauki.pl/articles/352832.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
inconel 718
mechanical properties
heat treatment
Opis:
Inconel 718 is a precipitation hardenable nickel-iron based superalloy. It has exceptionally high strength and ductility compared to other metallic materials. This is due to intense precipitation of the γ’ and γ” strengthening phases in the temperature range 650-850°C. The main purpose of the authors was to analyze the aging process in Inconel 718 obtained in accordance with AMS 5596, and its effect on the mechanical properties. Tensile and hardness tests were used to evaluate the mechanical properties, in the initial aging process and after reheating, as a function of temperature and time respectively in the ranges 650°-900°C and 5-480 min. In addition, to link the mechanical properties with the microstructure transmission microscopy observations were carried out in selected specimens. As a result, factors influencing the microstructure changes at various stages of strengthening were observed. The authors found that the γ’’ phase nucleates mostly homogenously in the temperature range 650-750°C, causing the greatest increase in strength. On the other hand, the γ’ and δ phases are formed heterogeneously at 850°C or after longer annealing in 800°C, which may weaken the material.
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 3; 1695-1702
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Thermal Treatment of Biomedical Ti-6Al-4V Alloy on Corrosion Resistance in Simulated Physiological Solutions
Autorzy:
Ryba, J.
Kawalec, M.
Tyrała, E.
Krawiec, H.
Powiązania:
https://bibliotekanauki.pl/articles/353015.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
titanium alloys
corrosion
heat treatment
microstructure
Opis:
The effect of heat treatment on the corrosion resistance of Ti-6Al-4V alloy was investigated in the artificial saliva solution (MAS). It has been revealed that the thermal annealing treatment temperature favors the cathodic reactions and reduce the protective properties of passive film. The heat treatment causes the enrichment of β phase in vanadium. The lowest corrosion resistance in the artificial saliva revealed the Ti-6Al-4V alloy heated for 2 hours at 950°C. Heterogeneous distribution of vanadium within the β phase decreases the corrosion resistance of the Ti-6Al-4V.
Źródło:
Archives of Metallurgy and Materials; 2020, 65, 1; 39-45
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Low pressure carburizing in a large-chamber device for high-performance and precision thermal treatment of parts of mechanical gear
Autorzy:
Wołowiec-Korecka, E.
Korecki, M.
Klimek, L.
Kula, P.
Brewka, A.
Buczek, M.
Powiązania:
https://bibliotekanauki.pl/articles/103225.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
heat treatment
vacuum carburizing
lean manufacturing
Opis:
This paper presents the findings of research of a short-pulse low pressure carburizing technology developed for a new large-chamber furnace for high-performance and precision thermal treatment of parts of mechanical gear. Sections of the article discuss the novel constructions of the device in which parts being carburized flow in a stream, as well as the low-pressure carburizing experiment. The method has been found to yield uniform, even and repeatable carburized layers on typical gear used in automotive industry.
Źródło:
Advances in Science and Technology. Research Journal; 2017, 11, 1; 253-258
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Tribological Properties and the Microstructure Investigations of Tin Babbit with Pb Addition after Heat Treatment
Autorzy:
Leszczyńska-Madej, B.
Madej, M.
Powiązania:
https://bibliotekanauki.pl/articles/355155.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
tribological properties
microstructure investigations
heat treatment
Opis:
The results of tribological tests and microstructure examinations of tin babbit with 1.5 % Pb addition after heat treatment are presented in this paper. The specimens were annealed at 150°C for 2, 8, 24 and 48 hours and then tested for wear resistance and Brinell hardness. The wear tests were carried out using a block-on-ring tester operating under dry and wet conditions. The samples were also investigated by light microscopy (LM) and scanning electron microscopy (SEM).
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 4; 1861-1868
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Densification and Magnetic Properties of Fe Powder Compacts According to Heat-Treatment Conditions
Autorzy:
Yoo, Hyo-Sang
Kim, Yong-Ho
Kim, Cheol-Woo
Son, Hyeon-Taek
Powiązania:
https://bibliotekanauki.pl/articles/2203721.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Fe powder
heat-treatment
microstructure
density
Opis:
In this study, the effects of heat-treatment conditions of Fe powder compacts on densification, microstructure, strength and magnetic properties were investigated. The prepared Fe powder was compressed in a mold of diameter 20 mm at a pressure of 800 MPa for 30 sec. This Fe powder compact was heat-treated under different atmospheres (air and 90% Ar + 10% H2 and heat-treatment temperatures (300 and 700℃). The Fe powder compacts heat-treated in an Ar+H2 mixed gas atmosphere showed a denser microstructure and higher density than the Fe powder compacts heat-treated in an air atmosphere. Oxygen content in the heat-treatment conditions played a significant role in the improvement of the densification and magnetic properties.
Źródło:
Archives of Metallurgy and Materials; 2023, 68, 1; 47--50
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The process of regenerative heat treatment of the valve chamber of the steam turbine
Autorzy:
Wieczorska, Agata
Powiązania:
https://bibliotekanauki.pl/articles/243595.pdf
Data publikacji:
2019
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
regenerative heat treatment
valve chamber
steam turbine
Opis:
Steel castings are often used in the construction of valve chambers of steam turbines. Stringent requirements are set due to the continuous operation of the material at elevated temperatures, in the order of 300ºC to 600ºC. The material of the valve chamber must be resistant to fatigue-creep changes as well as corrosion. This material must be also resistant to dynamic damage which occures when the turbine is starting and stopping. Dynamic damage is induced by a short-lasting but intense accumulation of localized stresses. The castings of the valve chambers of the steam turbine are usually made from the “three-component” type CrMoV-cast steel. Mentioned castings of the valve chamber are continuously subjected to high temperatures, either constant and periodically variable stresses. Due to this, the degradation process of material of the castings is taking place. It is caused by physicochemical processes such as: creep, relaxation, thermal fatigue, corrosion, erosion and changes in material properties, e.g. displacement of the critical point of brittleness. Finally, first cracks and deformations can be observed in the material during the operation. The art presents the process of revitalization technology of the steam turbine valve chamber which was subjected to long-term operation at high temperatures. The revitalization process is aimed at improving the plastic properties of the material and, as the result, extending its service life. The research presented in the article show that impact strength of the chamber material after revitalization is very high. Also the strength properties of the valve chamber, after revitalization, are high and in line with the requirements. The study show that the revitalization of the valve chamber was carried out correctly and restored the material to plastic deformation.
Źródło:
Journal of KONES; 2019, 26, 3; 243-248
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Heat Treatment on Corrosion Resistance of ZnAl40Ti2Cu Alloy
Autorzy:
Michalik, R.
Powiązania:
https://bibliotekanauki.pl/articles/353886.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
corrosion
Zn-Al alloy
structure
heat treatment
Opis:
The aim of this paper was to determine the effect of heat treatment for the corrosion resistance of the ZnAl40Ti2Cu alloy under “acid rain” conditions. ZnAl40TiCu alloy after supersaturation and after supersaturation and aging was studied. Potentiodynamic studies, potentiostatic studies and studies on structure of the alloy top layer of samples after corrosion tests were carried out. These investigations indicated a significant influence of heat treatment on corrosion resistance of the ZnAl40Ti2Cu alloy. The highest increase in corrosion resistance comparing to the alloy in the as-cast condition may be obtained by supersaturation. A significant influence of the aging temperature and time on corrosion resistance was proved.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 2; 883-888
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multistep Heat-Treatment Effects on Electrospun Nd-Fe-B-O Nanofibers
Autorzy:
Jeon, E. J.
Eom, N. S. A.
Lee, J.
Lee, B.
Cho, H. M.
On, J. S.
Choa, Y.-H
Kim, B. S.
Powiązania:
https://bibliotekanauki.pl/articles/354311.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Nd-Fe-B
nanofibers
electrospinning
heat treatment
Opis:
Neodymium-Iron-Boron (Nd-Fe-B) magnets are considered to have the highest energy density, and their applications include electric motors, generators, hard disc drives, and MRI. It is well known that a fiber structure with a high aspect ratio and the large specific surface area has the potential to overcome the limitations, such as inhomogeneous structures and the difficulty in alignment of easy axis, associated with such magnets obtained by conventional methods. I n this work, a suitable heat-treatment procedure based on single-step and multistep treatments to synthesize sound electrospun Nd-Fe-B-O nanofibers of Φ572 nm was investigated. The single-step heat-treated (directly heat-treated at 800°C for 2 h in air) samples disintegrated along with the residual organic compounds, whereas the multistep heat-treated (sequential three-step heat-treated including three steps;: dehydration (250°C for 30 min in an inert atmosphere), debinding (650°C for 30 min in air), and calcination (800°C for 1 h in air)) fibers maintained sound fibrous morphology without any organic impurities. They could maintain such fibrous morphologies during the dehydration and debinding steps because of the relatively low internal pressures of water vapor and polymer, respectively. In addition, the NdFeO3 alloying phase was dominant in the multistep heat-treated fibers due to the removal of barriers to mass transfer in the interparticles.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 3; 1433-1437
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of the Heat Treatment on the Microstructure and Corrosion Resistance of Austempered Ductile Iron (ADI)
Autorzy:
Krawiec, A.
Vignal, V.
Lelito, J.
Krystianiak, A.
Tyrała, E.
Powiązania:
https://bibliotekanauki.pl/articles/356075.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
austempered ductile iron
corrosion
microstructure
heat treatment
Opis:
The influence of the hold time of the austempering heat treatment at 280°C on the microstructure and corrosion resistance in NaCl-based media of austempered ductile iron was investigated using X-ray diffraction, micro-hardness measurements, corrosion tests and surface observations. Martensite was only found in the sample which was heat treated for a short period (10 minutes). Corrosion tests revealed that this phase does not play any role in the anodic processes. Numerous small pits were observed in the α-phase which is the precursor sites in all samples (whatever the value of the hold time of the austempering heat treatment).
Źródło:
Archives of Metallurgy and Materials; 2020, 65, 1; 151-156
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Empirical formulas for the calculations of the hardness of steels cooled from the austenitizing temperature
Autorzy:
Trzaska, J.
Powiązania:
https://bibliotekanauki.pl/articles/356569.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
CCT diagram
modeling
heat treatment
steel
hardness
Opis:
In this paper, the equations applied for the purpose of the calculations of the hardness of continuously cooled structural steels upon the basis of the temperature of austenitizing. The independent variables of the hardness model were: the mass concentrations of elements, the austenitizing temperature and the cooling rate. The equations were developed with the application of the following methods: multiple regression and logistic regression. In this paper, attention was paid to preparing data for the purpose of calculations, to the methodology of the calculations, and also to the assessment of the quality of developed formulas. The collection of empirical data was prepared upon the basis of more than 500 CCT diagrams.
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 3; 1297-1302
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Thermomechanical Controlled Processing and Quenching & Tempering on the Structure and Properties of Bainite-Martensite Steels
Autorzy:
Mandal, G.
Ghosh, S. K.
Chatterjee, S.
Powiązania:
https://bibliotekanauki.pl/articles/353508.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
steels
TMCP
heat treatment
microstructure
mechanical properties
Opis:
In the present time, advanced high strength steel (AHSS) has secured a dominant place in the automobile sector due to its high strength and good toughness along with the reduced weight of car body which results in increased fuel efficiency, controlled emission of greenhouse gases and increased passengers’ safety. In the present study, four new advanced high strength steels (AHSS) have been developed using three different processing routes, i.e., thermomechanical controlled processing (TMCP), quenching treatment (QT ), and quenching & tempering (Q&T) processes, respectively. The current steels have achieved a better combination of the high level of strength with reasonable ductility in case of TMCP as compared to the other processing conditions. The achievable ultrahigh strength is primarily attributed to mixed microstructure comprising lower bainite and lath martensite as well as grain refinement and precipitation hardening.
Źródło:
Archives of Metallurgy and Materials; 2020, 65, 2; 861-868
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spontaneous Formation of Titanium Nitride on the Surface of a Ti Rod Induced by Electro-Discharge-Heat-Treatment in an N2 Atmosphere
Autorzy:
Lee, W. H.
Yoon, Y. H.
Kim, Y. H.
Lee, Y. K.
Kim, J. Y.
Chang, S. Y.
Powiązania:
https://bibliotekanauki.pl/articles/352477.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
titanium
surface modification
diffusion
heat treatment
XPS
Opis:
A single pulse of 2.0 to 3.5 kJ of input energy from a 450 mF capacitor was applied to a commercially pure Ti rod in a N2 atmosphere. The surface of the Ti rod transformed from TiO2 into titanium nitride in times as short as 159 msec, providing a bimodal morphology of the cross-section. A much higher value of hardness that was observed at the edge of the cross-section was attributed to nitrogen-induced solid-solution hardening that occurred during the electrical discharge process. The activation energy (Ea) for the diffusion process was estimated to be approximately 86.9 kJ/mol. Results show that the electrical discharge process is a possible potential method for the nitriding of Ti; advantages include a short processing time and control of the nitrided layer without dimensional changes.
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 2B; 1281-1285
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Improved flotation of heat treated lignite with saline solutions containing mono and multivalent ions
Autorzy:
Ozdemir, O.
Ersoy, O. F.
Guven, O.
Turgut, H.
Cinar, M.
Çelik, M. S.
Powiązania:
https://bibliotekanauki.pl/articles/109640.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
flotation
heat treatment
lignite
DLVO
Saline Solutions
Opis:
Flotation of lignites is inherently difficult. However, pre-heat treatment of coal is also known to make coal surfaces more hydrophobic possibly through removal of water entrapped in the structure of coal. In this context, the objective of this study was, therefore, to determine changes in the hydrophobicity of some lignites under moderately controlled heat treatment and correlate the flotation response of lignites in different salt solutions of NaCl, KCl, CaCl2, and MgCl2 without using any reagent. The results of flotation tests suggested that under the present test conditions, it was possible to float thermally pre-treated lignite samples of partially hydrophobic character in salt solutions in the absence of collector and frother. In addition, the effect of heat treatment on hydrophobicity, and in turn flotation was explained by a theoretical model based on extended DLVO interactions to quantify the effects of both heat treatment and salt concentration on bubble-particle interactions. The results of theoretical modeling suggested that the removal of hydrogen containing groups from coal surfaces significantly contribute to the electrical double layer and hydrophobic forces that govern the magnitude of energetic barrier and also the extent of bubble-particle attachment.
Źródło:
Physicochemical Problems of Mineral Processing; 2018, 54, 4; 1070-1082
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Właściwości mechaniczne i korozyjne stopu AlZn5Mg1 po modyfikacji pierwiastkami stopowymi
The mechanical properties and corrosion of the alloy after modification AlZn5Mg1 alloying elements
Autorzy:
Jurczak, W.
Powiązania:
https://bibliotekanauki.pl/articles/223105.pdf
Data publikacji:
2006
Wydawca:
Akademia Marynarki Wojennej. Wydział Dowodzenia i Operacji Morskich
Tematy:
korozje
pierwiastki
obróbka cieplna
corrosion
elements
heat treatment
Opis:
W artykule przedstawiono wyniki badań właściwości mechanicznych i wytrzymałości na zmęczenie stopu AlZn5Mg2CrZr jako modyfikacji AlZn5Mg1 pierwiastkami stopowymi typu Cr, Zr, Ti. Odporność zmęczeniową wyznaczono, poddając badane stopy obrotowo-giętemu zginaniu w powietrzu i w 3% wodnym roztworze NaCl po różnych obróbkach cieplnych. Badania wytrzymałości zmęczeniowej i zmęczeniowo-korozyjnej tych stopów przeprowadzono dla wybranego zakresu cykli naprężeń zmęczeniowych (c.n.). Pozwoliło to na dobór odpowiednich materiałów konstrukcyjnych na lekkie spawane konstrukcje okrętowe podlegające cyklicznie zmiennym obciążeniom eksploatacyjnym. Badania wykazały, że parametry obróbki cieplnej decydują o wytrzymałości zmęczeniowej w powietrzu i wodzie morskiej. Modyfikacja struktury Cr i Zr stopu AlZn5Mg1 spowodowała, że wykazał on lepszą odporność korozyjno-zmęczeniową przy zastosowaniu odpowiednich parametrów obróbki cieplnej.
The article presents the results of investigations into mechanical properties and fatigue strength of rotary-flexural bending in the air medium and in 3% NaCl water solution of Al-Zn-Mg alloys samples in various stages of heat treatment. The trials were conducted for selected range of corrosion fatigue strength of tested alloys, which in turn, permitted selecting appropriate materials for light vessel structures affected by high changing loads in see water. The research indicated that heat treatment parameters decide about fatigue strength of examined materials in air and sea water. Modification of Cr and Zr structures of AlZn5Mg1alloy resulted in higher corrosion- -fatigue resistance of the alloy when appropriate heat treatment parameters were applied.
Źródło:
Zeszyty Naukowe Akademii Marynarki Wojennej; 2006, R. 47 nr 3 (166), 3 (166); 21-32
0860-889X
Pojawia się w:
Zeszyty Naukowe Akademii Marynarki Wojennej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ obróbki cieplnej na zużycie erozyjne stali 40Cr4
The effect of heat treatment on the erosive wear of steel 40Cr4
Autorzy:
Liszewski, M.
Krupicz, B.
Tarasiuk, W.
Powiązania:
https://bibliotekanauki.pl/articles/189218.pdf
Data publikacji:
2012
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
zużycie erozyjne
obróbka cieplna
erosive wear
heat treatment
Opis:
W pracy przedstawiono wyniki badań doświadczalnych dotyczące wpływu obróbki cieplnej stali 40Cr4 na zużycie erozyjne. Badaniu poddano stal w stanie dostarczonym, zahartowaną oraz zahartowaną i odpuszczoną. Odporność na zużycie strumieniowo-ścierne określono przy różnych kątach padania ścierniwa. Na podstawie uzyskanych wyników stwierdzono, że najwyższą odpornością na zużycie strumieniowo-ścierne charakteryzowały się próbki stali poddanej tylko hartowaniu. Posiadały one najwyższą twardość i wytrzymałość na rozciąganie.
The results of studies on the effect of heat treatment on working steel 40Cr4 on erosion wear and tear were presented. The study involved raw, hardened, and hardened and tempered steels. Wear resistance were tested using abrasive blast set at different angles of incidence of the abrasive. The obtained results showed that the highest resistance to wear blast is characterised by samples of heat-treated steel (quenching). They were the hardest and the highest tensile strength.
Źródło:
Tribologia; 2012, 3; 85-93
0208-7774
Pojawia się w:
Tribologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ehksperimental'noe issledovanie tekhnologicheskikh parametrov processa infrakrasnojj sushki dvizhushhegosja syr'ja syr'ja maslichnykh kul'tur
Experimental study of process parameters infrared drying moving ball of raw oilseeds
Autorzy:
Bandura, V.
Curkan, O.
Palamarchuk, V.
Powiązania:
https://bibliotekanauki.pl/articles/77295.pdf
Data publikacji:
2015
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
infrared heating
kinetics
drying
rapeseed
soybean
heat treatment
Źródło:
Motrol. Motoryzacja i Energetyka Rolnictwa; 2015, 17, 4
1730-8658
Pojawia się w:
Motrol. Motoryzacja i Energetyka Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of the homogenization temperature on the microstructure and properties of AlSi10CuNiMn alloy
Autorzy:
Cais, J.
Kraus, P.
Lysoňková, I.
Powiązania:
https://bibliotekanauki.pl/articles/102937.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
aluminum alloy
heat treatment
microstructure
intermetallic phase
microhardness
Opis:
The article examines the impact of changes in homogenization temperature in the hardening process on the microstructure of aluminum alloys. The research samples were cast from AlSi10CuNiMn alloy produced by gravity casting technology in metal mold. Subsequently, the castings were subjected to a heat treatment. In an experiment with changing temperature and staying time in the process of homogenization. The microstructure of the alloy was investigated by methods of light and electron microscopy. Examination of the microstructure has focused on changing the morphology of separated particles of eutectic silicon and intermetallic phases. The analysis of intermetallic phases was supplemented by an analysis of the chemical composition – EDS analysis. Effect of heat treatment on the properties investigated alloy was further complemented by Vickers microhardness. Investigated alloy is the result of longtime research conducted at the Faculty of Production Technology and Management.
Źródło:
Advances in Science and Technology. Research Journal; 2017, 11, 1; 104-110
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Examples of Simulation of the Alloying Elements Effect on Austenite Transformations During Continuous Cooling
Autorzy:
Trzaska, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/2049560.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
CCT diagram
simulation
neural network
heat treatment
steel
Opis:
The article shows examples of simulation of the chemical composition effect on austenite transformation during continuous cooling. The calculations used own neural model of CCT (Continuous Cooling Transformation) diagrams describing austenite transformations that occur during continuous cooling. The model allows to calculate a CCT diagrams of structural steels and engineering steels based on chemical composition of steel and austenitizing temperature. Examples of simulation shown herein are related to the effect of selected elements on the temperatures of phase transformations, hardness and volume fraction of ferrite, pearlite, bainite and martensite in steel.
Źródło:
Archives of Metallurgy and Materials; 2021, 66, 1; 331-337
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Induction hardening of tool steel for heavily loaded aircraft engine components
Autorzy:
Rokicki, P.
Powiązania:
https://bibliotekanauki.pl/articles/352313.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
induction hardening
heavily-loaded gears
heat treatment
microstructure
Opis:
Induction hardening is an innovative process allowing modification of the materials surface with more effective, cheaper and more reproducible way to compare with conventional hardening methods used in the aerospace industry. Unfortunately, high requirements and strict regulation concerning this branch of the industry force deep research allowing to obtain results that would be used for numerical modelling of the process. Only by this way one is able to start the industrial application of the process. The main scope of presented paper are results concerning investigation of microstructure evolution of tool steel after single-frequency induction hardening process. The specimens that aim in representing final industrial products (as heavily loaded gears), were heat- -treated with induction method and subjected to metallographic preparation, after which complex microstructure investigation was performed. The results obtained within the research will be a basis for numerical modelling of the process of induction hardening with potential to be introduced for the aviation industrial components.
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 1; 315-320
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ sposobu obróbki cieplnej na poziom polifenoli w świeżych i mrożonych brokułach
Effect of heat treatment on level of polyphenols in fresh and frozen broccoli
Autorzy:
Wieczorek, C.
Bilska, B.
Przybylski, W.
Klocek, A.
Powiązania:
https://bibliotekanauki.pl/articles/227865.pdf
Data publikacji:
2013
Wydawca:
Wyższa Szkoła Menedżerska w Warszawie
Tematy:
polifenole
obróbka cieplna
brokuły
polyphenols
heat treatment
broccoli
Opis:
Celem pracy przedstawionej w artykule jest ocena wpływu obróbki cieplnej na poziom polifenoli w brokułach świeżych i mrożonych. W zależności od rodzaju obróbki cieplnej (gotowanie na parze lub w wodzie) oraz założonych parametrów (czas) uzyskano zróżnicowane zawartości polifenoli. Wraz z wydłużeniem czasu gotowania zawartość tych związków uległa zmniejszeniu. Gotowanie na parze w mniejszym stopniu niż gotowanie w wodzie wpłynęło na zmniejszenie zawartości polifenoli w badanym warzywie. Brokuły świeże, niepoddane obróbce cieplnej zawierały o 44% więcej polifenoli niż mrożone.
Purpose of work was estimate the influence of heat treatment on level of polyphenols in fresh and frozen broccoli. Depending on kind of heat treatment (cooking in steam and cooking in water) and set up parameters (time) got different contents of polyphenols. Contents of this substances has undergone drop along with stretch time of cooking. Cooking in steam in smaller degree than cooking in water has effected drop of contents of polyphenols in vegetables. Fresh, not heat- treated broccoli, included about 44% more polyphenols then frozen.
Źródło:
Postępy Techniki Przetwórstwa Spożywczego; 2013, 2; 36-39
0867-793X
2719-3691
Pojawia się w:
Postępy Techniki Przetwórstwa Spożywczego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Parametric identification and modeling of rheological behavior of materials with fractal structure during heat treatment
Autorzy:
Sokolovskyy, Yaroslav
Shymanskyi, Volodymyr
Levkovych, Maryana
Kaspryshyn, Yaroslav
Powiązania:
https://bibliotekanauki.pl/chapters/32304248.pdf
Data publikacji:
2021
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
capillary-porous materials
deformation-relaxation processes
heat treatment
Opis:
The technological process of thermal treatment of capillary-porous materials, characterized by the influence of several factors on the material as load, humidity and temperature was considered. Mathematical models of non-isothermal moisture transfer and viscoelastic deformation, taking into account the fractal structure of the environment were constructed. One-dimensional mathematical models of deformation-relaxation processes in environments with fractal structure characterized by the effects of memory, spatial nonlocality and self-organization were considered. Taking into account that the fractional parameters of fractal models allow us to describe the deformation-relaxation processes in comparison with traditional methods more fully, the optimal approximation method, the Proni’s method was proposed. This method allows us to reduce the problem of identification of the fractional parameters which are part of the creep and relaxation kernels structure, to finding the solutions of systems of linear equations. Software to implement the obtained models was developed.
Źródło:
Methods and tools in CAD – selected issues; 107-117
9788366391871
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Combination of methods of thermal and radiation treatment of sediments associated with PCBs : the Delor type
Autorzy:
Fülöp, Marko
Šagátová, Andrea
Benkovský, Ivan
Prokes, Karel
Foltinova, Lubica
Powiązania:
https://bibliotekanauki.pl/articles/2055684.pdf
Data publikacji:
2021
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
electron beam
heat treatment
polychlorinated biphenyls
radiation degradation
Opis:
An efficient method of burning polychlorinated biphenyls (PCBs) is often used to remove the environmental burden of PCBs. However, combustion produces toxic dioxins and furans (PCDD/F), so residents are increasingly rejecting this method. The heat treatment (HT) method does not burn PCBs but evaporates it from sediments. Even in this process, PCDD/Fs are formed to a lesser extent, which are destroyed by radiation processing (RP) following the HT. At the same time, the RP method degrades PCB congeners down to biphenyls, which decompose easily in the environment. A block assembly of a complex synergistic combination of equipment for methods of thermal (HT) and radiation (RP) destruction of PCBs in sediments is proposed. The efficacy of this complex was preliminarily determined at a level of 70-fold reduction in PCB concentration in sediments. To achieve a higher reduction factor in the concentration of PCBs, possible procedures for optimizing the settings of individual devices of this complex are presented.
Źródło:
Nukleonika; 2021, 66, 4; 207--211
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of electronic exposure and heat treatment on the electrical conductivity of epoxy polymer materials
Autorzy:
Udovytska, Yuliia
Luniov, Sergiy
Kashytskyi, Vitalii
Maslyuk, Volodymyr
Megela, Ivan
Powiązania:
https://bibliotekanauki.pl/articles/950073.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:
irradiation
epoxy resin
specific electrical conductivity
heat treatment
Opis:
The influence of electron irradiation fluxes with energy of 12 MeV and heat treatment on the electrical properties of epoxypolymers with PEPA content of 11, 12 and 13 wt.h. per 100 wt. including epoxy resin. It is show that the electrical conductivity of epoxypolymer increases with electron irradiation fluxes greater than 10 kGy. It found that extra heat treatment of irradiated samples with a hardener content of 12 wt. h. hours leads to an increase in their electrical conductivity. The nature of the obtained dependences of electrical conductivity is determine by the processes of cross-linking, radiation, thermal destruction and mass fraction of the hardener. Radiation-stimulated increase in the conductivity of epoxypolymers can be use to create conductive protective coatings and sensor electronics elements.
Źródło:
Technical Sciences / University of Warmia and Mazury in Olsztyn; 2020, 23(1); 81-89
1505-4675
2083-4527
Pojawia się w:
Technical Sciences / University of Warmia and Mazury in Olsztyn
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badanie metodą emisji akustycznej rozciąganych próbek stalowych
Stretching tests of steel samples by the acoustic emission method
Autorzy:
Łapiński, Z.
Łukaszewicz, J.
Powiązania:
https://bibliotekanauki.pl/articles/235041.pdf
Data publikacji:
2006
Wydawca:
Wojskowy Instytut Techniczny Uzbrojenia
Tematy:
emisja akustyczna
obróbka cieplna
acoustic emission
heat treatment
Opis:
W artykule przedstawiono wyniki badań metodą Emisji Akustycznej rozciąganych próbek stalowych poddanych uprzednio obróbkom cieplnym i i chemicznym.
The results of tests carried out by the acoustic emission method against the steel samples after the thermal and chemical treatment are presented in the paper.
Źródło:
Problemy Techniki Uzbrojenia; 2006, R. 35, z. 99; 143-154
1230-3801
Pojawia się w:
Problemy Techniki Uzbrojenia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ obróbki cieplnej na jakość cukinii
Influence of heat treatment on the quality of courgette
Autorzy:
Ślaska-Grzywna, B.
Starek, A.
Powiązania:
https://bibliotekanauki.pl/articles/286448.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Inżynierii Rolniczej
Tematy:
cukinia
obróbka cieplna
tekstura
courgette
heat treatment
texture
Opis:
W pracy przedstawiono wyniki badań pomiaru mechanicznych cech tekstury cukinii po obróbce cieplnej w piecu konwekcyjno-parowym przy zmiennych parametrach: temperaturze, czasie i dodatku pary. Wyniki przeprowadzonych badań wykazały, iż zmiana parametrów obróbki cieplnej wpływa na badane cechy teksturalne cukinii kształtujące jej jakość.
The study presents the research results of measurement of a courgette texture mechanical properties after subjecting it to a heat treatment in the convectional - steam furnace at variable parameters: temperature, time and additional steam. The results of the research proved that the change of parameters of the heat treatment influences the tested texture properties of a courgette, which form its quality.
Źródło:
Inżynieria Rolnicza; 2011, R. 15, nr 6, 6; 223-229
1429-7264
Pojawia się w:
Inżynieria Rolnicza
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stress-corrosion resistance of the EN AW-AlZn5Mg1,5CuZr alloy in different heat treatment states
Autorzy:
Kyzioł, L.
Powiązania:
https://bibliotekanauki.pl/articles/258610.pdf
Data publikacji:
2013
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
heat treatment
stress corrosion
alloy structures
corrosion resistance
Opis:
The effect of heat treatment of the plastically worked 7000 series Al-Zn-Mg aluminium alloy system on its stress-corrosion resistance is examined. For the same chemical constitution, the effect of heat treatment on mechanical and corrosion properties of Al-Zn-Mg alloys systems is remarkable. It was proved that a parameter having significant effect on corrosion properties of the alloy is the rate of alloy cooling after heat treatment. This conclusion is confirmed by observation of structural forms which fully reflect mechanical and corrosion properties of the alloy.
Źródło:
Polish Maritime Research; 2013, 4; 39-44
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Changes In Properties of Hot-Dip Zinc Coating Resulting from Heat Treatment
Autorzy:
Jędrzejczyk, D.
Szatkowska, E.
Powiązania:
https://bibliotekanauki.pl/articles/351543.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
hot-dip zinc galvanizing
heat treatment
coating hardness
Opis:
This paper analyses the heat treatment of the hot-dip zinc coating deposited on both cast iron and steel. The aim of research is to increase coating hardness and wear resistance without decreasing its anticorrosion properties. Hot-dip zinc coating was deposited in industrial conditions (acc. PN-EN ISO 10684) on disc shape samples and bolts M12x60. The achieved results were assessed on the basis of microscopic observation (with the use of an optical and scanning microscope), EDS (point and linear) analysis and micro-hardness measurements. It was discovered that the heat treatment of zinc coating results in an increase in hardness which is caused by the corresponding changes in microstructure.
Źródło:
Archives of Metallurgy and Materials; 2019, 64, 1; 201-206
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A New Neural Networks Model for Calculating the Continuous Cooling Transformation Diagrams
Autorzy:
Trzaska, J.
Powiązania:
https://bibliotekanauki.pl/articles/351678.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
CCT diagram
modelling
neural network
heat treatment
steel
Opis:
The article shows a new model of Continuous Cooling Transformation (CCT) diagrams of structural steels and engineering steels. The modelling used artificial neural networks and a set of experimental data prepared based on 550 CCT diagrams published in the literature. The model of CCT diagrams forms 17 artificial neural networks which solve classification and regression tasks. Neural model is implemented in a computer software that enables calculation of a CCT diagram based on chemical composition of steel and its austenitizing temperature.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 4; 2009-2015
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of heat treatment on micro structural changes in aluminium bronze
Autorzy:
Hájek, J.
Křiž, A.
Chocholaty, O.
Pakuła, D.
Powiązania:
https://bibliotekanauki.pl/articles/356861.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aluminium bronzes
heat treatment
microstructure
EDS
corrosion resistance
Opis:
Effect of heat treatment on micro structural changes in aluminium bronze This paper attempts to summarise the niicrostructural changes which take place in aluniiniuni bronzes during heat treatment. Another objective of this study was to map the potential of a certain type of aluminium bronzes for undergoing martensitic transformation. The methods, which were chosen for assessing the results of heat treatment with regard to their availability, included measurement of hardness and observation of inicrostructure using light and scanning electron microscopy. Additional tools for evaluation of microstructure comprised measurement of microhardness and chemical analysis by EDS. An important part of the experiment is observation of microstructural changes in the Joniiny bar during the end-quench test. Upon completing experiments of this kind, one can define the heat treatment conditions necessary for obtaining optimum properties. In addition, the paper presents important findings on how to improve the corrosion resistance of aluminium bronzes by special heat treatment sequences.
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 3; 1271-1276
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Heat Treatment Effect on Physical Properties of Stainless Steel / Inconel Bonded by Directed Energy Deposition
Autorzy:
Eom, Yeong Seong
Kim, Kyung Tae
Kim, Dong Won
Yu, Ji-Hun
Sim, Chul Yong
An, Seung Jun
Park, Yong-Ha
Son, Injoon
Powiązania:
https://bibliotekanauki.pl/articles/2049122.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
directed energy deposition
interface
physical properties
heat treatment
Opis:
In this study, stainless steel 316L and Inconel 625 alloy powders were additively manufactured by using directed energy deposition process. And heat treatment effect on hardness and microstructures of the bonded stainless steel 316L/Inconel 625 sample was investigated. The microstructures shows there are no secondary phases and big inclusions near interfacial region between stainless steel 316L and Inconel 625 except several small cracks. The results of TEM and Vickers Hardness show the interfacial area have a few tens of micrometers in thickness. Interestingly, as the heat treatment temperature increases, the cracks in the stainless steel region does not change in morphology while both hardness values of stainless steel 316L and Inconel 625 decrease. These results can be used for designing pipes and valves with surface treatment of Inconel material based on stainless steel 316L material using the directed energy deposition.
Źródło:
Archives of Metallurgy and Materials; 2021, 66, 4; 1049-1054
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Heat Treatment and Nickel Content on the Properties of the GX4CrNi13-4 Steel
Autorzy:
Kaňa, V.
Krutiš, V.
Bořil, P.
Záděra, A.
Rimko, M.
Powiązania:
https://bibliotekanauki.pl/articles/2049568.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
martensitic steel
retained austenite
mechanical properties
heat treatment
Opis:
For the EN GX4CrNi13-4 martensitic stainless steel, research was conducted to investigate the impact of the quenching intensity and the content of nickel on the mechanical properties and amount of retained austenite. It was found that the amount of retained austenite significantly increases with growing nickel concentration. On the other hand, the cooling rate at quenching makes a difference only if the cooling is intensive, then amount of retained austenite decrease. A higher nickel content improves the mechanical properties. With more intensive cooling, the tensile strength decreases while the yield strength increases. The ductility is not significantly affected by the cooling intensity.
Źródło:
Archives of Metallurgy and Materials; 2021, 66, 1; 37-41
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Influence of Hyperquenching Temperature on Microstructure and Mechanical Properties of Alloy Cast Steel GX2CrNiMoCuN 25-6-3-3
Autorzy:
Jurczyk, P.
Wróbel, T.
Baron, C.
Powiązania:
https://bibliotekanauki.pl/articles/2049633.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
duplex cast steel
heat treatment
mechanical properties
microstructure
Opis:
The paper presents the research results concerning the chromium-nickel-molybdenum duplex cast steel GX2CrNiMoCuN 25-6-3-3 grade. The aim of studies was the description of the influence of hyperquenching temperature Tp i.e. 1100, 1125 and 1150°C on microstructure and mainly mechanical properties i.e. tensile strength UTS, yield strength YS, hardness HB, elongation EL and impact energy KV of duplex cast steel GX2CrNiMoCuN 25-6-3-3 grade. The range of studies included ten melts which were conducted in foundry GZUT S.A. Based on the obtained results was confirmed that application of hyperquenching process guarantees the elimination of brittle s phase in the microstructure of studied duplex cast steel. Moreover on the basis of conducted statistical analysis of the researches results is concluded that with the decrease in hyperquenching temperature increases ductility and amount of austenite, while decreases strength and amount of ferrite in studied duplex cast steel GX2CrNiMoCuN 25-6-3-3 grade.
Źródło:
Archives of Metallurgy and Materials; 2021, 66, 1; 73-80
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influences of Heat Treatment on Mechanical Behavior and Microstructure of the Explosively Welded D Grade Steel / En Aw 5083 Aluminium Joint
Autorzy:
Palaci, Yüksel
Olgun, M.
Powiązania:
https://bibliotekanauki.pl/articles/2049664.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
triclad
heat treatment
mechanical properties
dissimilar metal welding
Opis:
In this study, the effects of heat treatment on aluminum/steel structural transition joint (STJ) strength were analyzed with ram tensile tests to find the right welding conditions. Before ram tensile tests, the specimens were subjected to different heat treatments to simulate possible thermal conditions, which may occur during the welding of STJ to the steel side of ship construction. Temperatures were varied from 100°C to 500°C, and durations were changed between 5-25 minutes in the heat treatments. The results of the ram tensile tests indicated that tensile strength decreased above 300°C. Micro-hardness test and microstructure examination were conducted to understand behavior change during ram tensile tests. The investigation showed that precipitation of the secondary hard phases with aging at interface above 300°C, reduced the bonding between aluminum and steel materials, which lead to a decrease of strength, and also changed the mechanical behavior of the STJ during ram test from ductile to brittle fracture. If the temperature is below 500°C and the duration is under 15 minutes, the STJ strength value meets the standard requirement. Short and rapid welding could be suggested to reduce heat buildup during welding.
Źródło:
Archives of Metallurgy and Materials; 2021, 66, 2; 373-380
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ obróbki cieplnej na korozje stopów Al-Zn-Mg
The influence of heat treatment on stress corrosion of Al-Zn-Mg alloys
Autorzy:
Jurczak, W.
Powiązania:
https://bibliotekanauki.pl/articles/223210.pdf
Data publikacji:
2006
Wydawca:
Akademia Marynarki Wojennej. Wydział Dowodzenia i Operacji Morskich
Tematy:
korozje
obróbka cieplna
stopy metali
corrosion
heat treatment
alloys
Opis:
W artykule przedstawiono wyniki badań własności mechanicznych i odporności na korozję naprężeniową nowego stopu AlZn5Mg2CrZr (próbny wytop przemysłowy) w różnych stanach obróbki cieplnej i porównano z własnościami stopu AlZn5Mg1 zastosowanego w budownictwie okrętowym.
The paper presents the results of tests on mechanical properties and corrosion resistance of the new alloy AlZn5Mg2CrZr (experimental industrial production) in various stages of heat treatment and of their comparison with the properties of AlZn5Mg1 alloy which is used in shipbuilding.
Źródło:
Zeszyty Naukowe Akademii Marynarki Wojennej; 2006, R. 47 nr 2 (165), 2 (165); 37-50
0860-889X
Pojawia się w:
Zeszyty Naukowe Akademii Marynarki Wojennej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structures for Heat Treatment Assembled from Cast Elements
Autorzy:
Piekarski, Bogdan
Drotlew, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/1445040.pdf
Data publikacji:
2020
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
castings for heat treatment plants
design of castings
grates
Opis:
Various types of technological equipment individually designed for operation in pit and elevator heat treatment furnaces are described in this article. A common characteristic of these structures is that they are composed of several or several dozen thin-walled elements of various shapes and sizes, gravity cast in sand moulds from creep-resistant alloys (austenitic Cr-Ni/Ni-Cr cast steel and cast nickel alloys). The design of the castings requires the development of a manufacturing technology that can effectively use the principle of the simultaneous solidification of all components. Properly designed equipment should have minimum weight, maximum strength, and maximum loading capacity combined with adequate durability and reliability. Two designs of the equipment for the heat treatment of steel parts were presented. Both designs, as well as their individual components, were described in detail and illustrated. The main task of the equipment is to form the charge in the furnace and transport this charge both inside and outside the furnace. The first design is the design of an equipment for the heat treatment of large ring-shaped parts. The second design is the design of an equipment, whose structure can be modified using various repeatable components. As a result of these modifications, different variants of the equipment are obtained, allowing for the heat treatment of five different types of the shafts characterized by different shapes and sizes. The study is of an application nature. It is addressed to engineering and technical staff dealing with both the design and operation of heat treatment furnaces.
Źródło:
Journal of Casting & Materials Engineering; 2020, 4, 4; 53-57
2543-9901
Pojawia się w:
Journal of Casting & Materials Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of Post-Weld Heat Treatment on the Microstructure and Mechanical Properties of the AZ91 Laser Welded Joint
Autorzy:
Dziadoń, Andrzej
Musiał, E.
Powiązania:
https://bibliotekanauki.pl/articles/2106559.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
AZ91 alloy
laser welding
heat treatment after welding
Opis:
Plates of AZ91 magnesium alloy were butt-welded using a CO2 laser. The non-equilibrium solidification of the laser-melted metal caused fragmentation of the weld microstructure as well as the supersaturation of a solid solution of aluminium in magnesium, which enabled the T5 ageing of the weld. The weld proved to be a mechanically stable part of the joint; all the tensile-tested specimens, both as-welded and post-weld T5 aged, fractured outside it. During the ageing of the supersaturated joint, which involved heat treating it to the T6 condition, the weld was the region where discontinuous precipitation was observed and this was the location of fracture in the tensile specimens. Thus, the strength properties of welded, supersaturated and aged AZ91 were much worse than when the non-welded material was T6 tempered.
Źródło:
Archives of Metallurgy and Materials; 2022, 67, 2; 435--440
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characteristics of ADI Ductile Cast Iron with Single Addition of 1.56% Ni
Autorzy:
Mrzygłód, B.
Kowalski, A.
Olejarczyk-Wożenska, I.
Giętka, T.
Głowacki, M.
Powiązania:
https://bibliotekanauki.pl/articles/352389.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
ductile iron
heat treatment
structure of ADI
ADI properties
Opis:
The results of examinations of microstructure and an analysis of its impact on selected mechanical properties of austempered ductile iron (ADI) were presented in the paper. The ADI was produced from the ductile iron containing 1.56% Ni only alloying addition. The effect of the austempering time and temperature on the microstructure and mechanical properties of the examined cast iron was considered. Constant conditions of austenitizing were assumed and six variants of the austempering treatment were adopted. The studyof mechanical properties included a static tensile test, Charpy impact strength test and Brinellhardness measurement. This work complements the knowledge about alloying additions effect on microstructure and mechanical properties of ADI and focuses on the impact of a single alloying element (Ni).
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 4; 2273-2280
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An Influence of Ageing on the Structure, Corrosion Resistance and Hardness of High Aluminum ZnAl40Cu3 Alloy
Autorzy:
Michalik, R.
Tomaszewska, A.
Powiązania:
https://bibliotekanauki.pl/articles/353675.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Zn-Al-Cu alloys
heat treatment
corrosion resistance
hardness
Opis:
Zn-Al-Cu alloys are used primarily because of their tribological properties as an alternative material for bronze, cast iron and aluminum alloy bearings and as a construction material. Particularly interesting are high aluminum zinc alloys. Monoeutectic zinc and aluminum alloys are characterized by the highest hardness, tensile strength and wear resistance of all of the zinc alloys. A significant problem with the use of the Zn-Al-Cu alloys is their insufficient resistance to electrochemical corrosion. Properties of Zn-Al-Cu alloys can be improved by heat treatment. The purpose of examination was to determine the effect of heat treatment (aging at various temperatures) on the microstructure and corrosion resistance of the ZnAl40Cu3 alloy. The scope of the examination included: structural examinations, determination of hardness using Brinell’s method and corrosion resistance examinations. Ageing at higher temperatures causes a creation of areas where is an eutectoid mixture. The study showed that ageing causes a decrease in hardness of ZnAl40Cu3 alloy. This decrease is even greater, when the temperature of ageing is lower. The studies have shown a significant influence of ageing on the corrosion resistance of the alloy ZnAl40Cu3. Maximum corrosion resistance were characterized by the sample after ageing at higher temperatures.
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 1; 289-294
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Connecting Castings for Operation under Conditions of Cyclic Temperature Changes
Autorzy:
Drotlew, Andrzej
Piekarski, Bogdan
Powiązania:
https://bibliotekanauki.pl/articles/107011.pdf
Data publikacji:
2020
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
castings for heat treatment plants
grates
pillars
thermal fatigue
Opis:
The separable connections used in technological equipment of heat treatment furnaces (OTP) are described in this study. The equipment is used for the heat treatment of charges, i.e. for the thermal and thermo-chemical treatment of parts of machines and devices. OTP is used for the charge formation and its transport before, during and after heat treatment operations. Accessories of this type are usually compact structures composed of several or several dozen cast elements. The main components are grates and pillars, which form an outer contour of the OTP and also allow for the correct arrangement of heat-treated parts. To form a relatively rigid structure composed of the grates and pillars, it is necessary to join these components together. For this purpose, various types of separable connections are used, mainly of a cylindrical shape with threaded parts. The subject of this study is focused on the construction and operating conditions of typical OTP structures, as well as the methods of fastening the pillar in a grate, i.e. on the design of the bottom part of the pillar and the hole in the grate in which this pillar is embedded.
Źródło:
Journal of Casting & Materials Engineering; 2020, 4, 1; 16-21
2543-9901
Pojawia się w:
Journal of Casting & Materials Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimization of the heat treatment process of a steel porous charge using an integrated modelling
Autorzy:
Wyczółkowski, R.
Benduch, A.
Powiązania:
https://bibliotekanauki.pl/articles/102836.pdf
Data publikacji:
2014
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
porous charge
heat treatment
integrated modelling
effective thermal conductivity
Opis:
The paper discusses the structure and principle of operation of programs for integrated modelling of the processes of heat treatment of porous-structure steel charges, such as long product bundles or strip or wire coils. Consideration is given to the specificity of these models in respect to porous charges. This is associated with their untypical thermal properties, which are expressed using the concept of effective thermal conductivity.
Źródło:
Advances in Science and Technology. Research Journal; 2014, 8, 24; 13-18
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ litu na właściwości i odporność korozyjną stopów Al-Zn-Mg w wodzie morskiej
Effect of lithium on the properties and corrosion resistance of Al-Zn-Mg in seawater
Autorzy:
Jurczak, W.
Powiązania:
https://bibliotekanauki.pl/articles/222086.pdf
Data publikacji:
2005
Wydawca:
Akademia Marynarki Wojennej. Wydział Dowodzenia i Operacji Morskich
Tematy:
korozje
obróbka cieplna
woda morska
corrosion
heat treatment
seawater
Opis:
W artykule przedstawiono wyniki badań właściwości mechanicznych i odporności na korozję naprężeniową stopu AlZn4,5Mg1,2Li o zmiennej zawartości Li (1,2 – 2,5%) poddanego obróbce cieplnej jako modyfikacji okrętowego stopu AlZn5Mg1.
The paper presents the results of investigations into mechanical properties and resistance to tension-related corrosion of AlZn4,5Mg1,2Li alloy of variable content of Li (1.2 – 2.5%) subject to heat treatment as a modification of marine AlZn5Mg1 alloy.
Źródło:
Zeszyty Naukowe Akademii Marynarki Wojennej; 2005, R. 46 nr 3 (162), 3 (162); 37-49
0860-889X
Pojawia się w:
Zeszyty Naukowe Akademii Marynarki Wojennej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental evaluation of the effects of structural changes on the vibration properties of ck35 steel
Autorzy:
Yazani, Navid Moshtaghi
Powiązania:
https://bibliotekanauki.pl/articles/1837938.pdf
Data publikacji:
2021
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
microstructure
spheroidization heat treatment
modal analysis
natural frequency
damping
Opis:
The microstructure of some components which operate in high-temperature conditions (e.g. boiler components, turbine blades used in gas power plants, jet engines and reactors) is subjected to changes in long run, which leads to a degradation in the mechanical properties of these components and consequently, reduces their lifecycle. Therefore, it is so useful to detect the changes in the microstructure of these parts during their operation, employing an easy, fast and non-destructive method to determine their remaining life. In this study, we evaluate the effects of the microstructural changes on natural frequencies and the damping coefficient of CK35 steel, employing the experimental modal test. We aim to use the method for power plant components, if it has significant effects. To do so, we applied spheroidization heat treatment on CK35 steel samples having a primary structure of ferrite-pearlite for 24 and 48 hours. Then, we carried out the experimental modal test on samples having different metallurgical structures, but with the same dimensions and weights. According to the findings, the spherical ferrite-carbide particles in the ferrite structure increase the natural frequencies and damping coefficient. These tests show that the structural changes in this type of steel result in slight changes in the values of natural frequencies; however, it significantly changes the damping frequencies.
Źródło:
Acta Mechanica et Automatica; 2021, 15, 2; 53-57
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of the annealing time after welding on the mechanical properties of welded joint of T91 steel
Autorzy:
Wojsyk, K.
Golański, G.
Jasak, J.
Słania, J.
Zieliński, A.
Urbańczyk, P.
Powiązania:
https://bibliotekanauki.pl/articles/351017.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
T91 steel
post welded heat treatment
mechanical properties
Opis:
The paper presents the results of research on the influence of the time of annealing after welding at the temperature of 750°C on the mechanical properties of a homogeneous welded joint of T91 steel. The welded joints were annealed at 750°C for 0.5; 1.0; 1.5 and 2.0 hours. The research scope included the basic study, i.e. the measurement of hardness, the test of impact energy, the static tensile test, bending test, as well as the accelerated creep test. The results of the tests of mechanical properties indicate the possibility of using shorter annealing times for thin-walled welded joints, and thus the possibility of savings as a result of flexible heat treatments.
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 3; 1425-1430
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-50 z 413

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