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Analiza przemian fazowych z zakresu austenitu przy ciągłym chłodzeniu stali 38CrSiMo4–2–3
Języki publikacji
Abstrakty
This article describes the kinetics of phase transformations of undercooled austenite of 38CrSiMo4–2–3 alloy steel. The tested steel is called a model alloy, whose chemical composition represents a group of steels for heat improvement. In the research part, microstructural analysis was used, dilatometric method was used and hardness was measured. For the analysis of phase transformations under continuous cooling, steel samples were austenitized at 880°C, annealed for 20 min, and then cooled at various speeds in the range of 20°C/s÷0.1°C/s. On the developed CCT diagram of 38CrSiMo4–2–3 steel, the onset of ferrite and perlite evolution was observed in the cooling range of 1°C/s and 0.1°C/s. In turn, the “nose” of bainitic transformation occurs for a cooling curve of 10°C/s. The temperature at the beginning of the martensitic transformation Ms was 350°C. The steel was characterized by rather "low" hardenability, because to obtain the martensite itself in its microstructure, the use of cooling at a rate greater than 20°C/s was required.
W artykule opisano kinetykę przemian fazowych przechłodzonego austenitu konstrukcyjnej stali stopowej 38CrSiMo4–2–3. Badana stal jest tzw. stopem modelowym, który składem chemicznym reprezentuje grupę stali do ulepszania cieplnego. Finalnie opracowano wykres CTPc dla stali 38CrSiMo4–2–3.
Wydawca
Czasopismo
Rocznik
Tom
Strony
128--132
Opis fizyczny
Bibliogr. 17 poz., fig., tab.
Twórcy
autor
- AGH University of Science and Technology, Faculty of Metals Engineering and Industrial Computer Science, Cracow
Bibliografia
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- [7] Maisuradze M., Ryzhkov M., Kuklina A.: Phase transformations in D6AC steel during continuous cooling. Solid State Phenomena 265 (2017) 712÷716.
- [8] Lúcio de Fariaa G., Magalhães Ávila de Paulaa J., Fernandes de Limab M. S.: Characterization of phase transformations and microstructural changes in an API 5CT L80 steel grade during Ni alloy laser cladding. Materials Research 21/5 (2018) 1÷9.
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- [10] Rożniata E., Dziurka R.: The kinetics of phase transformations of undercooled austenite of 37MnCo6–4 hypoeutectoid steel. Inżynieria Materiałowa 35 (1) (2014) 25÷30.
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- [12] Rożniata E., Dziurka R.: Analysis of the microstructure of 37MnMo6–3 hypoeutectoid steel. Archives of Materials Science and Engineering 58 (2) (2012) 125÷129.
- [13] Rożniata E.: The microstructures and energy dispersive spectroscopy analysis of a hypoeutectoid steels with 1% Cr. Archives of Metallurgy and Materials 58 (4) (2013) 1253÷1259.
- [14] Yudin Yu. V., Maisuradze M. V., Kuklina A. A.: A study of the microstructure of bainite in steel 25G2S2N2MA by the method of atomic force microscopy. Metal Science and Heat Treatment 60/7–8 (2018) 427÷432.
- [15] Liu X.: Microstructural characterisation of pearlitic and complex phase steels using image analysis methods. Metallurgy and Materials Science School of Engineering, The University of Birmingham (2014).
- [16] Morri A., Ceschini L., Pellizzari M., Menapace C., Vettore F., Veneri E.: Effect of the austempering process on the microstructure and mechanical properties of 27MnCrB5–2 steel. Arch. Metall. Mater. 62/2 (2017) 643÷651.
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Uwagi
Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-2bab696e-bd93-4a0a-8a9e-44b462415a52