AISI304不锈钢在冷加工过程中的微观组织变化  

Microstructure change of AISI304 stainless steel in the course of cold working

作　　者：许淳淳[1] 张新生[1] 胡钢[1] 

机构地区：[1]北京化工大学材料科学与工程学院,北京100029

出　　处：《北京化工大学学报（自然科学版）》2002年第6期27-31,共5页Journal of Beijing University of Chemical Technology(Natural Science Edition)

基　　金：国家重点基础研究发展规划项目 (G19990 6 5 0 ) ;湖北省教委重点科学研究项目 (99A0 84) ;金属腐蚀与防护国家重点实验室项目

摘　　要：在不同温度下对AISI30 4不锈钢进行不同方式、不同程度冷加工 ,用铁素体测量仪测定马氏体相变量 ,研究了冷加工与马氏体相变的关系 ;将AISI30 4不锈钢在低温 (液氮 ,- 70℃ )条件下进行不同程度拉伸 ,采用透射电镜观测位错分布 ,研究了冷加工与位错密度的关系。结果表明 :冷加工在一定条件下可以产生形变诱发马氏体 ,其含量随冷加工变形量的增大而增加 ;同时 ,冷加工导致AISI30 4不锈钢中金属晶粒拉长 ,其位错密度随冷加工变形量的增加而增大。Martensite content of AISI304 stainless steels cold-worked at different temperatures, ways and degrees of deformation was examined by ferrmagnetometer, which was used to study the relations between cold working and martensite phase transformation. The distribution of the dislocations of AISI304 stainless steels drawn at -70?℃ with different degrees of deformation was observed by transmission electron microscope(TEM), which was used to study the relations between cold working and dislocation density. The results show that cold working, to some extent, can cause deformation-induced martensite, whose content increases with the increase of deformation. At the same time, it is also found that cold working makes the particles of AISI304 stainless steels stretched and the dislocation density of AISI304 stainless steel increases with the increase of deformation.

关 键 词：微观组织 AISI304不锈钢 冷加工 马氏体相变 位错密度 拉伸 弯曲 轧制 

分 类 号：TG301[金属学及工艺—金属压力加工] TG142.[一般工业技术—材料科学与工程]