Work Hardening Behavior and Stability of Retained Austenite for Quenched and Partitioned Steels

• 作 者: Cun-yu WANG Ying CHANG Jie YANG Wen-quan CAO Han DONG Yi-de WANG
• 机 构: Central Iron and Steel Research Institute,Taiyuan Iron and Steel Group Co.,Ltd.,National Key Laborat
• 出 处: Journal of Iron and Steel Research(International)
• 发表日期: 2016年02期
• 关键词: Q&P process work hardening retained austenite martensite mechanical property TRI

Both microstructure and mechanical properties of low alloy steels treated by quenching and partitioning(Q&P)process were examined.The mixed microstructure of martensite and large-fractioned retained austenite(about27.3%)was characterized and analyzed,excellent combinations of total elongation of 19% and tensile strength of1 835 MPa were obtained,and three-stage work hardening behavior was demonstrated during tensile test.The enhanced mechanical properties and work hardening behavior were explained based on the transformation-induced plasticity effect of large-fractioned austenite.

Both microstructure and mechanical properties of low alloy steels treated by quenching and partitioning (Q & P) process were examined. Mixed microstructure of martensite and large-fractioned retained austenite (about 27.3%) was characterized and analyzed, excellent combinations of total elongation of 19 % and tensile strength of 1 835 MPa were obtained, and three-stage work hardening behavior was demonstrated during tensile test. reinforced mechanical properties and work hardening behavior were explained based on the transformation-induced plasticity effect of large-fractioned austenite.