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 

机构地区：[1]Central Iron and Steel Research Institute,Beijing 100081,China [2]Taiyuan Iron and Steel Group Co.,Ltd.,Taiyuan 030003,Shanxi,China [3]National Key Laboratory of Industrial Equipment Structural Analysis,School of Automotive Engineering,Dalian University of Technology,Dalian 116024,Liaoning,China [4]Society of Automotive Engineers of China,Beijing 100055,China

出　　处：《Journal of Iron and Steel Research International》2016年第2期130-137,共8页

基　　金：Item Sponsored by Youth Science Funds of China(51101036);National Basic Research Program of China(2010CB630803);National Key Technology Support Program of China(2013BAE07B05)

摘　　要：Both microstrueture 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 （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. The en hanced mechanical properties and work hardening behavior were explained based on the transformation induced plas ticity effect of large fractioned austenite.Both microstrueture 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 （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. The en hanced mechanical properties and work hardening behavior were explained based on the transformation induced plas ticity effect of large fractioned austenite.

关 键 词：Q＆P process work hardening retained austenite MARTENSITE mechanical property TRIP effect 

分 类 号：TG142.1[一般工业技术—材料科学与工程]