用等径角挤压变形法进行奥氏体不锈钢锭开坯的研究  

Investigation of Blooming of Austenitic Stainless Steel Ingot by ECAP

作　　者：杨钢[1] 吕惠生[2] 邓波[1] 王立民[1] 刘正东[1] 

机构地区：[1]钢铁研究总院结构材料研究所,北京100081 [2]钢铁研究总院科技信息室,北京100081

出　　处：《钢铁》2008年第2期77-80,共4页Iron and Steel

基　　金：国家高技术研究发展计划项目(863)(2002AA302501)

摘　　要：对铸态奥氏体不锈钢的等径角挤压变形(ECAP)试样进行了高温固溶处理,并与锻造试样+固溶处理后的组织、性能进行了对比,研究表明:室、高温ECAP试样在1 150℃固溶处理后均可得到完全再结晶组织;增加ECAP道次对完全再结晶后的晶粒尺寸影响不大,但略微增加晶粒尺寸的均匀性;铸态奥氏体不锈钢采用ECAP+固溶处理新工艺后,可以获得与锻造+固溶处理工艺类似的组织、力学性能,有可能实现铸锭的开坯。High temperature solution treatment of ECAPed samples of austenitic stainless steel ingot was studied experimentally , and both microstructure and properties of ECAP ＋ solution samples were compared with that of forging ＋ solid solution samples, the results show that full recrystallized microstructure of samples ECAPed at room and elevated temperature was obtained after solid solution at 1 150 ~C. The increase of ECAP pass number has no effect on grain size, however homogeneity can be improved. After ECAP ＋ solution treatment, both microstruc- ture and properties of cast austenitic stainless steel samples are as same as that of forging ＋ solution ones, showing that ECAP is a suitable method to replace blooming.

关 键 词：等径角挤压变形 奥氏体不锈钢 铸锭开坯 

分 类 号：TG376[金属学及工艺—金属压力加工]