254SMO不锈钢铸态组织及其高温固溶处理工艺  

As-cast microstructure and high temperature solution treatment process of 254SMO stainless steel

作　　者：高昂 钱张信[2] 刘德学 Gao Ang;Qian Zhangxin;Liu Dexue(School of Materials Science and Engineering,Lanzhou University of Technology,Lanzhou Gansu 730050,China;Jiuquan Iron and Steel(Group)Co.,Ltd.,Jiayuguan Gansu 735100,China)

机构地区：[1]兰州理工大学材料科学与工程学院,甘肃兰州730050 [2]酒泉钢铁(集团)有限责任公司,甘肃嘉峪关735100

出　　处：《金属热处理》2021年第11期195-199,共5页Heat Treatment of Metals

摘　　要：通过显微组织观察和背散射电子扫描观察了不同时间、不同温度的固溶处理对超级奥氏体不锈钢254SMO铸态组织的影响,并采用电子探针技术观察了钢中σ相的溶解过程。结果表明,随着固溶时间和温度的增加,不锈钢中的铸态枝晶组织逐渐消融,偏析逐渐消除,σ相逐渐溶解并转化为δ相(铁素体)。其中1280℃×9 h固溶处理的效果最好。Effect of solution treatment at different temperatures and time on the as-cast microstructure of super austenitic stainless steel 254SMO was studied by microstructure observation and back scattering electron scanning,and theσphase dissolution process in the steel was studied by electron microprobe.The results show that with the increase of solution treatment time and temperature,the as-cast dendrite structure and the segregation gradually disappear,and theσphase gradually dissolves and transforms intoδphase(ferrite).The optimum solid solution treatment process is 1280℃×9 h.

关 键 词：固溶处理 254SMO不锈钢 Σ相 铸态组织 

分 类 号：TG156.1[金属学及工艺—热处理]