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Tytuł:
Evaluation of Heat Capacity and Resistance to Cyclic Oxidation of Nickel Superalloys
Autorzy:
Przeliorz, R.
Binczyk, F.
Gradoń, P.
Góral, M.
Mikuszewski, T.
Powiązania:
https://bibliotekanauki.pl/articles/381534.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
foundry technology
nickel superalloys
heat resistance
DSC calorimeter
heat capacity
technologie odlewnicze
nadstop niklu
odporność na ciepło
DSC kalorymetru
pojemność cieplna
Opis:
Paper presents the results of evaluation of heat resistance and specific heat capacity of MAR-M-200, MAR-M-247 and Rene 80 nickel superalloys. Heat resistance was evaluated using cyclic method. Every cycle included heating in 1100°C for 23 hours and cooling for 1hour in air. Microstructure of the scale was observed using electron microscope. Specific heat capacity was measured using DSC calorimeter. It was found that under conditions of cyclically changing temperature alloy MAR-M-247 exhibits highest heat resistance. Formed oxide scale is heterophasic mixture of alloying elements, under which an internal oxidation zone was present. MAR-M-200 alloy has higher specific heat capacity compared to MAR-M-247. For tested alloys in the temperature range from 550°C to 800°C precipitation processes (γ′, γ′′) are probably occurring, resulting in a sudden increase in the observed heat capacity.
Źródło:
Archives of Foundry Engineering; 2014, 14, 3; 67-70
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research on Technology of Alloyed Copper Casting
Autorzy:
Rzadkosz, S.
Kranc, M.
Garbacz-Klempka, A.
Piękoś, M.
Kozana, J.
Cieślak, W.
Powiązania:
https://bibliotekanauki.pl/articles/380832.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
casting technology
copper
alloyed copper
copper deoxidation
heat treatment
technologia odlewnicza
miedź
obróbka cieplna
Opis:
The work presents experiment results from the area of copper casting technology and chosen examples of alloyed copper. At present, copper casting technology is applied in many branches of industrial manufacturing, especially in the sector of construction, communications, arms and power engineering. Alloyed copper, containing slight additions of different elements and having special physio-chemical properties, is used in a special range of applications. Copper technology and alloyed copper analyses have been presented, these materials being used for cast manufacturing for power engineering. The quality of casts has been assessed, based on their microstructure analysis, chemical content and the cast properties. During the research, special deoxidizing and modifying agents were applied for copper and chosen examples of alloyed copper; also exemplary samples were tested with the help of metallographic analysis, electrical conductivity and gaseous impurities research.
Źródło:
Archives of Foundry Engineering; 2014, 14, 2; 79-84
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The decreasing of die cracking for HDPC technology by changing parameters of heat treatment
Autorzy:
Herman, A.
Zikmund, P.
Powiązania:
https://bibliotekanauki.pl/articles/380274.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
metalografia
obróbka cieplna
właściwości mechaniczne
odlewanie ciśnieniowe
metallography
heat treatment
mechanical properties
die material
HPDC technology
Opis:
In earlier works were described trends in the production of tools for die casting (hot work). Almost the entire set of issues dealt with may seem insignificant when incompletely assembled acceptance of the material and the associated risks of processing a material with an inappropriate structure, leading to a very early defect of the die. Therefore, further work will focus particularly on identifying the causes of thermal cracks and preventing a suitable choice of acceptance criteria conditions and heat treatment.
Źródło:
Archives of Foundry Engineering; 2012, 12, 3; 49-52
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cast construction elements for heat treatment furnaces
Autorzy:
Piekarski, B.
Drotlew, A.
Powiązania:
https://bibliotekanauki.pl/articles/382333.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innovative foundry technology
innovative foundry material
heat treatment plant
innowacyjna technologia odlewnicza
innowacyjny materiał odlewniczy
zakład obróbki cieplnej
Opis:
The study presents sketches and photos of the cast creep-resistant components used in various types of heat treatment furnaces. The shape of the elements results from the type of the operation carried out in the furnace, while dimensions are adjusted to the size of the furnace working chamber. The castings are mainly made from the high-alloyed, austenitic chromium-nickel or nickel-chromium steel, selecting the grade in accordance with the furnace operating conditions described by the rated temperature, the type and parameters of the applied operating atmosphere, and the charge weight. Typical examples in this family of construction elements are: crucibles, roller tracks, radiant tubes and guides. The majority of castings are produced in sand moulds.
Źródło:
Archives of Foundry Engineering; 2011, 11, 3 spec.; 163-170
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermal Stresses in the Accessories of Heat Treatment Furnaces vs Cooling Kinetics
Autorzy:
Bajwoluk, A.
Gutowski, P.
Powiązania:
https://bibliotekanauki.pl/articles/382585.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
foundry industry
application of information technology
information technology
grates
thermal stresses
heat treatment equipment
przemysł odlewniczy
zastosowanie technologii informatycznej
technologia informatyczna
ruszty
naprężenia termiczne
sprzęt do obróbki cieplnej
Opis:
Depending on the course of the processes of heat treatment and thermo-chemical treatment, the technological equipment of heat treatment furnaces is exposed to different operating conditions, as the said processes differ among themselves in the temperature of annealing and atmosphere prevailing in the furnace chamber, in the duration of a single work cycle and in the type and temperature of the coolant. These differences affect the magnitude of stresses occurring in each cycle of the operation of furnace accessories, and thus play an important role in fatigue processes leading to the destruction of these accessories. The kinetics of temperature changes during each cooling process plays an important role in the formation of thermal stresses on the cross-section of the cooled parts. It depends on many factors, including the initial cooling temperature, the type and temperature of the cooling medium, or the dimensions and shape of the object. This article presents a numerical analysis of the effect of the initial temperature on the distribution of stresses on the cross-section of the grate ribs, generated in the first few seconds of the cooling process carried out in two cooling media, i.e. hardening oil and water. The analysis was carried out by the finite element method, based on the results of experimental testes of temperature changes in the rib during its cooling.
Źródło:
Archives of Foundry Engineering; 2019, 3; 88-93
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of Thermal Stresses in Components of Pallets Operating in Furnaces for the Carburising Treatment
Autorzy:
Bajwoluk, A.
Gutowski, P.
Powiązania:
https://bibliotekanauki.pl/articles/380818.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
foundry industry
application of information technology
pallet
heat flow
thermal stresses
przemysł odlewniczy
zastosowanie technologii informatycznych
przepływ ciepła
naprężenia
Opis:
The study is devoted to an analysis of thermal stresses arising in the basic elements of pallets used in furnaces for the carburising treatment. The construction of a pallet was presented and an example of its operating cycle was described. Using finite element method, a simulation analysis of the kinetics of cooling and heating of selected pallet components was performed. The results obtained were verified experimentally and used as a basis for the analysis of thermal stresses generated in these components during their cooling.
Źródło:
Archives of Foundry Engineering; 2014, 14, 1 spec.; 175-180
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Effect of Cooling Agent on Stress and Deformation of Charge-loaded Cast Pallets
Autorzy:
Bajwoluk, A.
Gutowski, P.
Powiązania:
https://bibliotekanauki.pl/articles/382504.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
information technology
foundry industry
cast grate
thermal stresses
heat treatment equipment
technologia informacyjna
przemysł odlewniczy
paleta odlewnicza
naprężenia cieplne
obróbka cieplna
Opis:
The results of research on the effect of the type of cooling agent used during heat treatment and thermal-chemical treatment on the formation of temperature gradient and stress-deformation distribution in cast pallets, which are part of furnace accessories used in this treatment, are disclosed. During operation, pallets are exposed to the effect of the same conditions as the charge they are carrying. Cyclic thermal loads are the main cause of excessive deformations or cracks, which after some time of the cast pallet operation result in its withdrawal due to damage. One of the major causes of this damage are stresses formed under the effect of temperature gradient in the unevenly cooled pallet construction. Studies focused on the analysis of heat flow in a charge-loaded pallet, cooled by various cooling agents characterized by different heat transfer coefficients and temperature. Based on the obtained temperature distribution, the stress distribution and the resulting deformation were examined. The results enabled drawing relevant conclusions about the effect of cooling conditions on stresses formed in the direction of the largest temperature gradient.
Źródło:
Archives of Foundry Engineering; 2017, 17, 4; 13-18
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Flexibility of Pusher Furnace Grate
Autorzy:
Słowik, J. A.
Drotlew, A.
Piekarski, B.
Powiązania:
https://bibliotekanauki.pl/articles/383197.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innovative foundry technology
innovative foundry material
heat treatment plant
pusher furnace
innowacyjna technologia odlewnicza
innowacyjny materiał odlewniczy
obróbka cieplna
piec przepychowy
Opis:
The lifetime of guide grates in pusher furnaces for heat treatment could be increased by raising the flexibility of their structure through, for example, the replacement of straight ribs, parallel to the direction of grate movement, with more flexible segments. The deformability of grates with flexible segments arranged in two orientations, i.e. crosswise (perpendicular to the direction of compression) and lengthwise (parallel to the direction of compression), was examined. The compression process was simulated using SolidWorks Simulation program. Relevant regression equations were also derived describing the dependence of force inducing the grate deformation by 0.25 mm ‒ modulus of grate elasticity ‒ on the number of flexible segments in established orientations. These calculations were made in Statistica and Scilab programs. It has been demonstrated that, with the same number of segments, the crosswise orientation of flexible segments increases the grate structure flexibility in a more efficient way than the lengthwise orientation. It has also been proved that a crucial effect on the grate flexibility has only the quantity and orientation of segments (crosswise / lengthwise), while the exact position of segments changes the grate flexibility by less than 1%.
Źródło:
Archives of Foundry Engineering; 2016, 16, 4; 137-140
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design Options to Decrease the Thermal Stresses in Cast Accessories for Heat and Chemical Treatment Furnaces
Autorzy:
Bajwoluk, A.
Gutowski, P.
Powiązania:
https://bibliotekanauki.pl/articles/380577.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
information technology
foundry industry
cast grate
thermal stress
heat treatment equipment
technologia informatyczna
przemysł odlewniczy
paleta odlewnicza
naprężenie termiczne
obróbka cieplna
Opis:
By the very nature of their work, castings used in furnaces for heat treatment and thermo-chemical treatment are exposed to the effect of many unfavorable factors causing their deformation and cracking, significantly shortening the lifetime. The main source of damage are the micro-and macro-thermal stresses appearing in each cycle. As the cost of furnace instrumentation forms a significant part of the total furnace cost, in designing this type of tooling it is important to develop solutions that delay the damage formation process and thus extend the casting operation time. In this article, two structural modifications introduced to pallets castings to reduce thermal stresses arising at various stages of the cooling process are proposed. The essence of the first modification consists in making technological recesses in the wall connections, while the aim of the second one is to reduce the stiffness of the pallet by placing expanders in the external walls. Using the results of simulation analyses carried out by the finite element method, the impact of both proposed solutions on the level of thermal stresses was evaluated.
Źródło:
Archives of Foundry Engineering; 2018, 18, 4; 125-130
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Heuristic Model of the Mechanical Properties of a Hypoeutectic EN AC-42100 (EN AC-AlSi7Mg0.3) Silumin Alloy Subjected to Heat Treatment
Autorzy:
Górny, Z.
Kluska-Nawarecka, S.
Czekaj, E.
Wilk-Kołodziejczyk, D.
Saja, K.
Powiązania:
https://bibliotekanauki.pl/articles/383182.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
information technology
application of information technology
foundry industry
silumin alloy
mechanical properties
heat treatment
fuzzy logic
artificial intelligence
technologie informatyczne
zastosowanie technologii informatycznych
przemysł odlewniczy
silumin
właściwości mechaniczne
obróbka cieplna
sztuczna inteligencja
Opis:
The object of the experimental studies was to determine the mechanical properties of a hypoeutectic EN AC - 42100 (EN ACAlSi7Mg0,3) silumin alloy, where the said properties are changing as a result of subjecting the samples of different types to solution treatment. An important aspect of the studies was the use type of device for the heat treatment. As a basic parameter representing the mechanical properties, the tensile strength of the metal (Rm) was adopted.
Źródło:
Archives of Foundry Engineering; 2014, 14, 4; 35-38
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Method to Make Classification of the Heat Treatment Processes Performed on Bronze Using Incomplete Knowledge
Autorzy:
Kluska-Nawarecka, S.
Górny, Z.
Regulski, K.
Wilk-Kołodziejczyk, D.
Jančíková, Z.
David, J.
Powiązania:
https://bibliotekanauki.pl/articles/947501.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
information technology
foundry industry
heat treatment
classification algorithms
rough sets
data mining
technologia informacyjna
przemysł odlewniczy
obróbka cieplna
algorytmy klasyfikacyjne
zbiory przybliżone
Opis:
The article describes the problem of selection of heat treatment parameters to obtain the required mechanical properties in heat- treated bronzes. A methodology for the construction of a classification model based on rough set theory is presented. A model of this type allows the construction of inference rules also in the case when our knowledge of the existing phenomena is incomplete, and this is situation commonly encountered when new materials enter the market. In the case of new test materials, such as the grade of bronze described in this article, we still lack full knowledge and the choice of heat treatment parameters is based on a fragmentary knowledge resulting from experimental studies. The measurement results can be useful in building of a model, this model, however, cannot be deterministic, but can only approximate the stochastic nature of phenomena. The use of rough set theory allows for efficient inference also in areas that are not yet fully explored.
Źródło:
Archives of Foundry Engineering; 2014, 14, 2; 69-72
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of DSC Method in Studies on Phase Transitions of Ni Superalloys
Autorzy:
Przeliorz, R.
Piątkowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/382295.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innovative material
innovative technology
nickel superalloy
differential scanning calorimetry
specific heat
innowacyjny materiał
technologia innowacyjna
nadstop niklu
skaningowa kalorymetria różnicowa
ciepło właściwe
Opis:
The paper presents results of calorimetric studies of foundry nickel superalloys: IN100, IN713C, Mar-M247 and ŻS6U. Particular attention was paid to determination of phase transitions temperatures during heating and cooling. The samples were heated to a temperature of 1500°C with a rate of 10°C min–1 and then held at this temperature for 5 min. After a complete melting, the samples were cooled with the same rate. Argon with a purity of 99.99% constituted the protective atmosphere. The sample was placed in an alundum crucible with a capacity of 0.45 cm3. Temperature and heat calibration was carried out based on the melting point of high-purity Ni. The tests were carried out by the differential scanning calorimetry (DSC) using a Multi HTC high-temperature calorimeter from Setaram. Based on the DSC curves, the following temperatures were determined: solidus and liquidus, dissolution and precipitation of the γ’ phase, MC carbides and melting of the γ’/γ eutectic. In the temperature range of 100-1100°C, specific heat capacity of the investigated superalloys was determined. It was found that the IN713C and IN100 alloys exhibit a higher specific heat while compared to the Mar-M247 and ŻS6U alloys.
Źródło:
Archives of Foundry Engineering; 2017, 17, 4; 133-136
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Castings in Pit Furnaces for Heat Treatment
Autorzy:
Drotlew, A.
Piekarski, B.
Powiązania:
https://bibliotekanauki.pl/articles/380488.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innovative foundry technology
innovative foundry material
heat treatment plant
cast grate
pit furnace
innowacyjna technologia odlewnicza
innowacyjny materiał odlewniczy
zakład obróbki cieplnej
paleta odlewnicza
piec grzewczy
Opis:
The article presents examples of typical designs of the cast technological equipment used in pit furnaces for the heat treatment of metals and alloys. The equipment consists of a set of castings connected together in a proper way and used for the formation and transport of charge, which consists of the heat treated parts. Typical equipment has the shape of a cylinder. Usually it comprises a basic pallet (carrier) completed with other elements, i.e. intermediate pallets, rods, spacers, cross-bars and hooks, their number depending on the number and shape of heat-treated products and on production volume. The simplest design solution is to use a cylindrical basket where heat treated products are arranged in a loose configuration. The majority of elements forming the furnace equipment are castings produced in sand molds. Some of them were designed and manufactured in a Foundry of the West Pomeranian University of Technology in Szczecin.
Źródło:
Archives of Foundry Engineering; 2015, 15, 3 spec.; 11-14
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Żaroodporne powłoki Al-Si wytworzone metodą zawiesinową
Heat-resisting Al-Si coatings manufactured with the slurry method
Autorzy:
Kochmańska, A.
Gawdzińska, K.
Powiązania:
https://bibliotekanauki.pl/articles/381583.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innowacyjny materiał odlewniczy
innowacyjna technologia odlewnicza
powłoka żaroodporna
metoda zawiesinowa
korozja wysokotemperaturowa
innovative foundry material
innovative foundry technology
heat resisting coating
slurry method
high temperature corrosion
Opis:
Podniesienie odporności elementów maszyn i urządzeń na korozję wysokotemperaturową uzyskuje się między innymi stosując powłoki żaroodporne na bazie aluminium. Wytworzenie powłoki dyfuzyjnej o budowie gradientowej sprzyja większej żywotności powłok i jednocześnie elementów zabezpieczanych. Detale bardzo często są odlewane i nie poddawane obróbce mechanicznej. Nałożenie powłoki powinno być możliwe na powierzchni surowego odlewu. W pracy przedstawiono wyniki badań nad wytwarzaniem ochronnych powłok aluminiowo-krzemowych nakładanych metodą zawiesinową na żarowytrzymałe staliwo GX30NiCrSi30-20, stop niklu Inconel 617 oraz stop tytanu TiAl6V4. Tą samą metodą wytworzono powłoki na różnych podłożach. W celu uzyskania powłok ochronnych zastosowano metodę zawiesinową. W skład zawiesiny wchodzą proszki metali, spoiwo organiczne oraz topnik. Elementy pokryte zawiesiną o tym samym składzie wygrzewano w piecu w atmosferze powietrza w odpowiednim czasie i temperaturze. Otrzymane powłoki posiadają budowę dwustrefową. Uzyskane powłoki poddano badaniom strukturalnym opisującym: budowę strefową i skład chemiczny. Określono również grubość i mikrotwardość powłok.
Increase in high temperature corrosion resistance is achieved, among other things, by application of heat-resisting, aluminum-based coatings. Production of a diffusion coating of gradient structure favors longer life of both coatings and preserved elements. Parts are very often casted and not subjected to machining. Application of a coating should be possible on the raw surface of the casting. This paper presents results of a study of manufacturing of protective Al-Si coatings, applied using the slurry method on a high-temperature creep resisting cast steel GX30NiCrSi30-20, a nickel alloy-Inconel 617 and a titanium alloy TiAl6V4. The same method was used to apply coatings on different surfaces. To obtain protective coatings, the slurry method was used. The slurry is composed of metal powders, an organic binder and a fusing agent. Elements coated with slurry of the same composition were hold in a furnace in air atmosphere, at an appropriate temperature and for an appropriate time period. Obtained coatings have a bizonal structure. The coatings were subjected to structural testing, describing the zonal structure and the chemical constitution. Thickness and microhardness of the coatings were also determined.
Źródło:
Archives of Foundry Engineering; 2012, 12, 1s; 107-112
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical modeling of melting process of thin metal films subjected to the short laser pulse
Autorzy:
Majchrzak, E.
Dziatkiewicz, J.
Powiązania:
https://bibliotekanauki.pl/articles/380460.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
technologia informatyczna
przemysł odlewniczy
techniki numeryczne
wymiana ciepła
proces topienia
metoda różnic skończonych
information technology
foundry industry
numerical techniques
micro scale heat transfer
melting process
finite difference method
Opis:
Thin metal film subjected to a short-pulse laser heating is considered. The parabolic two-temperature model describing the temporal and spatial evolution of the lattice and electrons temperatures is discussed and the melting process of thin layer is taken into account. At the stage of numerical computations the finite difference method is used. In the final part of the paper the examples of computations are shown.
Źródło:
Archives of Foundry Engineering; 2012, 12, 4; 105-108
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
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