Fe-11Mn-4Al-0.2C钢的应变硬化行为  

Strain Hardening Behaviors of Fe-11Mn-4Al-0. 2C Steels

作　　者：蔡志辉[1] 辛啟斌[1] 孔辉[1] 丁桦[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2013年第12期1721-1724,1729,共5页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金重点项目(51031001);中央高校基本科研业务费研究生创新项目(N120602001)

摘　　要：采用淬火一回火的新工艺，使冷轧实验钢Fe-11Mn在700～800℃淬火后得到铁素体和奥氏体的双相组织．通过拉伸实验可得实验钢抗拉强度达到920～1150MPa，延伸率达到35％～65％．通过XRD对试样拉伸变形前后的组织进行了分析，表明实验钢在拉伸过程中发生了TRIP效应．通过分析冷轧实验钢拉伸过程中的应变硬化行为，证明了合适的铁素体数量和奥氏体晶粒尺寸使奥氏体发生TRIP效应的时机最佳，从而得到优良的力学性能．A new quenching-tempering heat treatment method was adopted for the Fe-11Mn cold- rolled steels which yielded a duplex microstructure consisting of ferrite and austenite when the samples were quenched in the range of 700 - 800 ℃, leading to good combinations of tensile strength（920 - 1 150 MPa）and elongation（35% - 65% ）. The volume fraction of austenite of the cold-rolled samples before and after the tensile tests was analyzed through XRD, and it was evidenced that TRIP effects occurred during the deformation. The strain hardening behavior during the tensile tests was studied. It proved that the optimized amount of ferrite and grain size of austenite made the TRIP effects occur at the appropriate time, therefore excellent mechanical orooerties were obtained.

关 键 词：热处理 TRIP效应 显微组织 力学性能 应变硬化率 

分 类 号：TG335.58[金属学及工艺—金属压力加工]