کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
795720 1466776 2007 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Isothermal transformation of austenite to bainite in high carbon steels
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی صنعتی و تولید
پیش نمایش صفحه اول مقاله
Isothermal transformation of austenite to bainite in high carbon steels
چکیده انگلیسی

Bainitic transformation occurs in a temperature range between the high temperature transformations such as ferrite and pearlite and the low temperature transformations such as martensite. Bainite consists of aggregates of platelets or laths of ferrite separated by regions of phases such as austenite or martensite. The aim of this research is determination of the kinetics of the austenite transformation over the temperature range 250–500 °C. For this purpose, several specimens from a plain-high carbon steel were isothermally heat treated at different temperatures from 250 to 500 °C for different holding times. The specimens then were studied using a transmission electron microscope. The results showed that austenite, in the high carbon steel, transformed to bainite over the temperature range 250–475 °C, according to separate C-curves on the isothermal transformation diagram. It was shown that above ∼325 °C, austenite transformation starts with formation of upper bainite and below that temperature the transformation starts with formation of lower bainite. Also, in some regions in the temperature range 250–375 °C both upper and lower bainite could be seen, simultaneously.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Materials Processing Technology - Volume 189, Issues 1–3, 6 July 2007, Pages 107–113
نویسندگان
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