0Cr13铁素体不锈钢等径转角挤压变形与再结晶组织和性能  

Structure and Properties of Equal-channel Angular Pressing Deformed and Recrystallized for 0Cr13 Ferritic Stainless Steel

作　　者：杜习乾[1,2] 杨钢[2] 马爱琼[1] 杨沐鑫[2,3] 

机构地区：[1]西安建筑科技大学材料科学与工程学院,陕西西安710055 [2]钢铁研究总院结构材料研究所,北京100081 [3]昆明理工大学材料科学与工程学院,云南昆明650093

出　　处：《热加工工艺》2012年第16期213-215,217,共4页Hot Working Technology

摘　　要：研究了0Cr13铁素体不锈钢经等径转角挤压(ECAP)变形和退火处理后的微观组织和力学性能。金相观察表明,变形态0Cr13钢经650～800℃退火1h后,内部形成平均晶粒尺寸为10μm左右的再结晶组织。同时,力学性能测试表明,退火温度对变形态0Cr13钢的力学性能影响显著,随退火温度由650℃升高到800℃,再结晶组织的发展导致对应的强度、硬度下降,而塑性则逐渐改善。结果表明,优选的ECAP变形+700℃×1 h退火工艺,可使实验钢获得最佳的强度-塑性配比。The microstructure and mechanical properties of 0Cr13 ferritic stainless steel processed by equal-channel angular pressing（ECAP） deformation and subsequent annealing treatment were investigated.Metallographic examinations results show that a very fine recrystallized microstructure with average grain size around 10 μm has been completed by post-ECAP annealing at 650-800 ℃ for 1 h.Meanwhile,the annealing temperature has significant effect on mechanical properties of the deformed steel.With the annealing temperature increasing from 650 ℃ to 800 ℃,the development of recrystallization resulting in the decrement of strength and hardness,while plasticity resumes gradually.The optimal treatment processing is ECAP and annealing at 700 ℃ for 1 h,which yields optimum relationship between ductility and strength.

关 键 词：0Cr13铁素体不锈钢 等径转角挤压 再结晶 组织与性能 

分 类 号：TG156.2[金属学及工艺—热处理]