奥氏体不锈钢的组织超细化技术  

Microstructure Refining Technique of Austenitic Stainless Steel

作　　者：杨钢[1] 刘正东[1] 龚志华[1] 王立明[1] 林肇杰[1] 程世长[1] 

机构地区：[1]钢铁研究总院结构材料研究所,北京100081

出　　处：《钢铁研究学报》2006年第4期32-36,共5页Journal of Iron and Steel Research

基　　金：国家高技术研究发展计划(863计划)资助项目(2002AA302501)

摘　　要：在试验的基础上研究了获得奥氏体不锈钢超细组织的方法，研究结果表明，原始晶粒尺寸为100μm的304N不锈钢经1道次等径角挤压变形＋退火工艺处理后，晶粒尺寸可显著细化到2～7μm，强度可提高50％以上，而塑性并不降低；增加等径角挤压变形的道次，经退火后可获得更细小、均匀的再结晶晶粒。The technology to obtain ultra-fine microstructure of austenitic stainless steel was studied. The results show that the grain size of 304N stainless steel can be re-fined to 2-7 μm from its original 100μm after one-pass ECAP ＋ recrystallization annealing, with a strength increased more than by 50 % at same plasticity; Recrystallized grain size can be reduced further after similar treatment with increaseed ECAP pass number.

关 键 词：奥氏体不锈钢 超细组织 再结晶 退火 

分 类 号：TG306[金属学及工艺—金属压力加工]