کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7177061 1466745 2015 29 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of a quenching-long partitioning treatment on the microstructure and mechanical properties of a 0.2C% bainitic steel
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی صنعتی و تولید
پیش نمایش صفحه اول مقاله
Effect of a quenching-long partitioning treatment on the microstructure and mechanical properties of a 0.2C% bainitic steel
چکیده انگلیسی
A quenching-long partitioning (Q-LP) heat treatment has been proposed for large-scale industrial production of steel components. Compared to the conventional quenching-tempering (Q-T) and quenching-partitioning (Q-P) process, the steel treated by air-quenching from austenitizing temperature and 60 min-partitioning at 200 °C exhibits the best combination of strength and toughness. With a nearly unchanged product of strength and elongation of around 18 GPa%, the room-temperature impact toughness has been significantly improved from 84 J/cm2 for the air Q-T treatment to 104 J/cm2 for the Q-LP treatment, which is attributed to the more retained austenite and the effective relief of the microstresses. The multi-phase microstructure of the Q-LP treated steel contains martensite, bainite and retained austenite exhibiting two different morphologies, i.e., one is the inter-lath plates, and the other is the austenite films within the bainite plates.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Materials Processing Technology - Volume 222, August 2015, Pages 181-187
نویسندگان
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