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Tytuł:
Calculation of Assimilation Process of Non-metallic Inclusions by Slag
Autorzy:
Kalisz, D.
Powiązania:
https://bibliotekanauki.pl/articles/106919.pdf
Data publikacji:
2017
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
non-metallic inclusions
assimilation
slag
balance of forces
Opis:
This paper presents the results of calculating the phenomenon of the absorption of non-metallic precipitates in steel by slag. Calculations are made for the forces acting on the non-metallic particles in steel during the flow-out into the slag, depending on the particle radius and physicochemical properties of the liquid steel and slag. An analysis of the calculation results of capillary force acting on a particle in the vicinity of the steel-slag interface at changing surface energy values between the precipitates and slag shows that capillary force depends on the interfacial tension between the precipitates and slag only to a small degree.
Źródło:
Journal of Casting & Materials Engineering; 2017, 1, 2; 43-47
2543-9901
Pojawia się w:
Journal of Casting & Materials Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Effect of Non-Metallic Inclusions Formed as a Result of Deoxidation on the Fatigue Strength of 15CrNi6 and 16MnCr5 Steel
Autorzy:
Lipa, S.
Sawicki, J.
Dybowski, K.
Pietrasik, R.
Januszewicz, B.
Powiązania:
https://bibliotekanauki.pl/articles/353324.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
fatigue strength
non-metallic inclusions
thermo-chemical treatment
Opis:
This paper presents the findings of fatigue strength tests of 15CrNi6 steel following low-pressure carburizing and oil quenching, subjected to cycles of one-sided three-point bending. The fatigue fractures were compared with the results of fatigue strength studies of 16MnCr5 steel following low-pressure carburizing and nitrogen quenching. The fatigue tests for 16MnCr5 steel were conducted as part of a high-cycle resonance test, with a pendular bending load. The study also involved an analysis of the effects on non-metallic inclusions in the structure on the mechanism of fatigue destruction. The inclusions were found to initiate fatigue cracks. In both cases, a similar method of a fatigue fissure initiation was observed, independent of the study method or specimen material.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 3; 1345-1350
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research of microstructure of molybden doped weldings of oil and gas pipelines
Autorzy:
Pandova, Iveta
Rimar, Miroslav
Makarenko, Valery
Vinnikov, Yuri
Mangura, Andrey
Zaborowski, Tadeusz
Aloshyn, Valentyn
Powiązania:
https://bibliotekanauki.pl/articles/2037421.pdf
Data publikacji:
2021
Wydawca:
STE GROUP
Tematy:
structure
fracture
corrosion
crystal lattice
non–metallic inclusions
Opis:
Still existing scientific, technical and technological developments to improve the quality of welded joints of metal pipe structures contain contradictions and uncertainty about the effects of alloying elements, such as molybdenum, mechanical and visco-plastic properties, as well as metallographic component joints. All this indicates the need for a systematic study of these problems for the development of rational metallurgical and technological measures to significantly improve the technological and corrosion-mechanical properties of weld metal. Metallographic studies, using laboratory equipment with high identifying ability, found that the doping of weld metal with molybdenum in the amount of 0.2-0.4% causes fragmentation of ferrite-pearlite structure, including carbides Mn and Fe, and also reduces the number and size of non-metallic inclusions – sulfides, oxides and silicates. Moreover, non-metallic inclusions have a dispersed appearance, which promotes plasticization of the structure, which directly increases the viscous-plastic characteristics and resistance of the metal joints to crack formation. Based on the results of metallographic research, the optimum content in the weld metal of the alloyed element – molybdenum, which is 0.2-0.4%, is determined.
Źródło:
Management Systems in Production Engineering; 2021, 4 (29); 274-279
2299-0461
Pojawia się w:
Management Systems in Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of electro slag remelting on 14 109 steel properties
Autorzy:
Pribulova, A.
Futáš, P.
Kmita, A.
Márasová, D.
Holtzer, M.
Powiązania:
https://bibliotekanauki.pl/articles/355904.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
electroslag remelting
slag
non-metallic inclusions
mechanical properties
chemical composition
Opis:
The Electro Slag Remelting (ESR) is one of the remelting processes in the field of metal refinery. In this process, the slag plays various roles, such as heat generation, protection of melt, and chemical refining. The main objective of the experiments described in this article was to identify the most appropriate slag composition for the electro slag remelting of the steel in order to achieve the chemical composition compliant with the standard applicable to the given steel, minimum sulphur content, minimum contents of oxide and sulphide inclusions, as well as mechanical properties corresponding to the standard applicable to the steel STN 14 109. Ten electrodes were remelted, whereas the remelting was carried out under 8 slags. The used slags containing 70% of CaF2 and 30% of Al2O3 with different addition of CaO, the slags consisted of the same components as previous slags, whereas the ratio of individual components was 1:1:1, and with SiO2 and MgO and slag without Al2O3. With regard to all the above mentioned facts, the slag types which may be regarded as the most appropriate for the STN 14 109 steel remelting are the basic slags containing 70% of CaF2 - 30% of Al2O3 with added 30 and 45 weight % of CaO.
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 1; 181-185
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Deoxidation Impact on Non-Metallic Inclusions and Characterization Methods
Autorzy:
Nicolini, C.
Powiązania:
https://bibliotekanauki.pl/articles/106913.pdf
Data publikacji:
2017
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
sulfide morphology
deoxidation
non-metallic inclusions
low carbon steel
SEM-FEG
Opis:
Deoxidation is an unavoidable step in the elaboration of steel. The study of its influence could improve the quality of low-carbon steel (0.20–0.25 wt.% of carbon). There are many deoxidation methods, and the most-common one consists of adding aluminum. Although it is a classic method, determining the optimal process parameters (quantity, yield, etc.) could be very sensitive. Deoxidation plays a determining role on inclusion cleanliness, especially on sulfide morphology. In order to control the efficiency of deoxidation, different techniques can be used. In this paper, an automated counting procedure on a scanning electron microscope with a field emission gun (FEG-SEM) is presented. This method was applied on samples cast in our laboratory under different deoxidation conditions. According to this, the resulting inclusion population is correlated with the aluminum content to find the optimal process parameters.
Źródło:
Journal of Casting & Materials Engineering; 2017, 1, 4; 97-102
2543-9901
Pojawia się w:
Journal of Casting & Materials Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena powtarzalności czystości metalurgicznej łuków ortodontycznych
The analysis of metallurgical purity repeatability of orthodontic wires
Autorzy:
Koczkodon, K.
Grygier, D.
Powiązania:
https://bibliotekanauki.pl/articles/99126.pdf
Data publikacji:
2018
Wydawca:
Politechnika Śląska. Katedra Biomechatroniki
Tematy:
biomateriał
łuk ortodontyczny
wtrącenia niemetaliczne
biomaterial
orthodontic wire
non-metallic inclusions
Opis:
Materiały metaliczne przeznaczone do produkcji aparatów ortodontycznych powinny posiadać następujące cechy: wysokie właściwości mechaniczne i fizykochemiczne, biokompatybilność i jednorodność struktury. Bardzo ważnym aspektem jest również ich stopień zanieczyszczenia wtrąceniami niemetalicznymi. Wyniki badań prezentowanych w pracy wykazały dużą różnorodność w zakresie czystości metalurgicznej materiału badanych drutów, mogącej wskazywać, iż w analizowanej partii łuków znajdują się produkty pochodzące z różnych wytopów, znacząco różniące się jakością wykonania.
The metallic materials designed to production of braces possess following features: high mechanical and physicochemical proprieties, biocompatibility and homogeneity of structure. Very important point is also degree non-metallic inclusion. The results of investigations presented in work show the large diverseness of metallurgical cleanness of studied wires material, which lead that various product could coming from different melting, non-uniform with quality of realization.
Źródło:
Aktualne Problemy Biomechaniki; 2018, 15; 13-20
1898-763X
Pojawia się w:
Aktualne Problemy Biomechaniki
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Interaction of Non-Metallic Inclusion Particles with Advancing Solidification Front
Oddziaływanie cząstek wydzieleń niemetalicznych z postępującym frontem krzepnięcia
Autorzy:
Kalisz, D.
Powiązania:
https://bibliotekanauki.pl/articles/354360.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
solidification front
non-metallic inclusions
forces
front krzepnięcia
wydzielenie niemetaliczne
siła
Opis:
This work deals the phenomenon interaction of crystallization front on the particles of non-metallic precipitates. The behavior of a single particle in the vicinity of horizontal and vertical front was analyzed. The forces acting on the particle were characterized and the equilibrium condition formulated, from which the critical velocity of front may be deduced. The calculation results were illustrated in the form of graphs.
Praca zajmuje się zjawiskiem oddziały wania przemieszczającego frontu krystalizacji na cząstki wydzieleń niemetalicznych. Analizowano zachowanie pojedynczej cząstki wydzielenia w pobliżu poziomego i pionowego frontu. Scharakteryzowano siły działające na cząstkę w pobliżu frontu i sformułowano warunek równowagi, z którego wynika szybkość krytyczna frontu. Wyniki obliczeń zilustrowano w postaci wykresów.
Źródło:
Archives of Metallurgy and Materials; 2014, 59, 2; 493-500
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wtrącenia niemetaliczne w staliwie topionym w małym piecu indukcyjnym
Non-metallic Inclusions in Cast Steel Melted in a Small Induction Furnace
Autorzy:
Suchoń, J.
Studnicki, A.
Szajnar, J.
Powiązania:
https://bibliotekanauki.pl/articles/379961.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
staliwo
wtrącenia niemetaliczne
dodatki stopowe
cast steel
non-metallic inclusions
alloying additives
Opis:
Czynnikiem decydującym o jakości wielu stopów w tym szczególnie staliwa jest ilość, wielkość i rodzaj wtrąceń niemetalicznych. W prezentowanej pracy podjęto próbę określenia jak wpływają skład chemiczny, dodatki stopowe oraz sposób prowadzenia wytopu na ilość i rodzaj wtrąceń niemetalicznych.
Determinant of the quality of many alloys in particular cast a number of magnitude and type of non-metallic inclusions. In the present study attempts to determine how they affect the chemical composition, alloying elements and the manner in which the melt of the number and type of non-metallic inclusions.
Źródło:
Archives of Foundry Engineering; 2013, 13, 2 spec.; 93-97
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Corrosion Resistance and Pitting Behaviour of Low-Carbon High-Mn Steels in Chloride Solution
Autorzy:
Grajcar, A.
Grzegorczyk, B.
Kozłowska, A.
Powiązania:
https://bibliotekanauki.pl/articles/350848.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
high-Mn steel
non-metallic inclusions
SEM
polarization
pitting
effects of strain
Opis:
Corrosion resistance of the X4MnSiAlNbTi27-4-2 and X6MnSiAlNbTi26-3-3 type austenitic steels, after hot deformation as well as after cold rolling, were evaluated in 3.5% NaCl solution using potentiodynamic polarization tests. A type of nonmetallic inclusions and their pitting corrosion behaviour were investigated. Additionally, the effect of cold deformation on the corrosion resistance of high-Mn steels was studied. The SEM micrographs revealed that corrosion damage formed in both investigated steels is characterized by various shapes and an irregular distribution at the metallic matrix, independently on the steel state (thermomechanically treated or cold worked). Corrosion pits are generated both in grain interiors, grain boundaries and along the deformation bands. Moreover, corrosion damage is stronger in cold deformed steels in comparison to the thermomechanically treated specimens. EDS analysis revealed that corrosion pits preferentially nucleated on MnS and AlN inclusions or complex oxysulphides. The morphology of corrosion damage in 3.5% NaCl supports the data registered in potentiodynamic tests.
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 2A; 825-832
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of multi-hole filter modification on the flow hydrodynamic structure and refining process of liquid steel in the one-strand tundish
Autorzy:
Bartosiewicz, M.
Cwudziński, A.
Powiązania:
https://bibliotekanauki.pl/articles/356431.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
tundish
continuous steel casting
multi-hole filter
liquid steel flow
non-metallic inclusions
Opis:
In this work, the authors proposed a modification of the working space one-strand tundish adapted for slab casting process. Numerical simulations of liquid steel flow in the considered flow reactor were performed. The tundish is equipped with a dam with a multi-hole filter. Two variants of the filter hole arrangement were tested and their effect on the liquid steel flow hydrodynamic structure in the tundish was examined. The computer calculations results were verified by performing experiments on the water model. The result of numerical and physical simulations an RTD (Residence Time Distribution) type F curve was generated, which define the transition zone between the cast steel grades during the sequential casting process. The results of the researches showed that the modification of a dam with a multi-hole filter affects on the formation of the liquid steel flow hydrodynamic structure and the transition zone. Furthermore, examinations of the liquid steel refining ability in the considered tundish were carried out. The influence of the filter holes arrangement on the non-metallic inclusions flotation process to the slag phase and liquid steel filtration processes was checked. Numerical simulations were performed in the Ansys-Fluent computer program.
Źródło:
Archives of Metallurgy and Materials; 2019, 64, 1; 71-78
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 44

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