邓波, 杨钢, 钟毅, et al. Influence of Original Structure on Equal Channel Angular Pressing Deformation of 304L Extra-Low Carbon Stainless Steel[J]. Special Steel, 2007, 28(4): 21-23.
邓波, 杨钢, 钟毅, et al. Influence of Original Structure on Equal Channel Angular Pressing Deformation of 304L Extra-Low Carbon Stainless Steel[J]. Special Steel, 2007, 28(4): 21-23.DOI:
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。
Abstract
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 cast 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.