原始组织对304L超低碳奥氏体不锈钢等径角挤压变形的影响  

Influence of Original Structure on Equal Channel Angular Pressing Deformation of 304L Extra-Low Carbon Stainless Steel

作　　者：邓波[1] 杨钢[2] 钟毅[1] 张凌义[1] 王立民[2] 郭富强[1] 

机构地区：[1]昆明理工大学材料与冶金工程学院,昆明650093 [2]钢铁研究总院,北京100081

出　　处：《特殊钢》2007年第4期21-23,共3页Special Steel

基　　金：国家高新技术"863"研究发展计划基金(2002AA302501)

摘　　要：304L超低碳奥氏体不锈钢由25 kg真空感应炉冶炼,用透射电镜(TEM)研究了该钢铸态组织200℃等径角挤压变形(ECAP)后组织演变和铸态组织1道次ECAP+1150℃1.5 h,AC处理(固溶组织)再进行ECAP后的组织。结果表明,304L钢铸态组织1道次ECAP变形过程中主要的变形机制为滑移变形,同时出现少量的孪晶变形;304L钢固溶组织在ECAP变形过程中孪晶变形数量急剧增加,孪晶和滑移共同进行,细化原始晶粒组织演变。The 304L extra-low carbon stainless steel was melted by a 25 kg vacuum induction furnace. The structure evolution of as cast structure of steel after 1 pass equal channel angular pressing （ECAP） at 200 ℃ and the structure of steel with one pass ECAP of as east structure ＋ 1 150 ℃ 1.5 h, AC treatment （solid solution structure） then ECAP have been studied by transmission electron microscopy. Results showed that the main deformation mechanism for as cast structure of 304L steel during 1 pass ECAP was slipping with a small number of twinning deformation; while during ECAP of solid solution structure of 304L steel the amount of twinning deformation obviously increased, the slipping and twinning deformation produced together to fine original grain.

关 键 词：31ML奥氏体不锈钢 等径角挤压变形 组织 

分 类 号：TG376[金属学及工艺—金属压力加工]