Effect of cementite precipitation on the extend of bainite transformation in fe-cr-c steel

• Autorzy: Ławrynowicz Z.
• Języki publikacji: EN

Abstrakty

EN

Analytical calculations and experimental measurements of volume fraction of bainitic ferrite and volume of the untransformed austenite indicate that there is a necessity of carbides precipitation. A consequence of the precipi-tation of cementite during austempering is that the growth of bainitic ferrite can continue to larger extent and that the resulting microstructure is not an ausferrite but it is a mixture of bainitic ferrite, retained austenite and carbides.

Słowa kluczowe

EN

carbon diffusion; decarburization; bainite transformation

• Wydawca: Politechnika Gdańska
• Czasopismo: Advances in Materials Science
• Rocznik: 2011
• Tom: Vol. 11, nr 3(29)
• Strony: 13--19
• Opis fizyczny: Bibliogr. 12 poz., rys., tab.

Twórcy

autor

Ławrynowicz Z.

• University of Technology and Life Sciences in Bydgoszcz, Mechanical Engineering Faculty, Department of Materials Science and Engineering, Kaliskiego 7, 85-796 Bydgoszcz, Poland,

Bibliografia

• 1. Ławrynowicz, Z., Dymski, S.: Application of the mechanism of bainite transformation to modelling of processing window in ductile iron ADI, Archives of Foundry Engineering, 6 (2006), 177-182.
• 2. Guzik, S. E.: Austempered cast iron as a modern constructional material, Inżynieria Materiałowa, 6 (in Polish) (2003), 677-680.
• 3. Ławrynowicz Z.: Carbon partitioning during bainite transformations in low alloy steels. Materials Science and Technollogy 18 (2002), 1322-1324.
• 4. Ławrynowicz Z.: Transition from upper to lower bainite in Fe-Cr-C steel. Materials Science and Technology. 20 (2004), 1447-1454.
• 5. Ławrynowicz Z.: Mechanism of bainite transformation in Fe-Cr-Mo-V-Ti-C steel. International Journal of Engineering, 12 (1999), 81-86.
• 6. Bhadeshia H.K.D.H.: Diffusion of carbon in austenite. Metal Science 15 (1981), 477-479.
• 7. Bhadeshia H.K.D.H., Bainite in Steels, Institute of Materials, 1-458, London, 1992.
• 8. Bhadeshia H.K.D.H., Christian J.W.: Bainite in Steels, Metallurgical Transactions A 21A (1990), 767-797.
• 9. Siller R.H., McLelan R.B.: The Application of First Order Mixing Statistics to the Variation of the Diffusivity of Carbon in Austenite. Metallurgical Transactions 1 (1970), 985-988.
• 10. McLellan R.B., Dunn W.W.: J. Phys. Chem. Solids. Vol.30 (1969) 2631.
• 11. Christian J.W.: Theory of transformations in metals and alloys, 778, Oxford, Pergamon Press, 1965.
• 12. Takahashi, M., Bhadeshia, H.K.D.H.: A Model for the Microstructure of Some Advanced Bainitic Steels, Materials Transaction, JIM, 32, (1991) 689-696.