金属热处理 ›› 2021, Vol. 46 ›› Issue (11): 195-198.DOI: 10.13251/j.issn.0254-6051.2021.11.034

• 工艺研究 • 上一篇    下一篇

254SMO不锈钢铸态组织及其高温固溶处理工艺

高昂1, 钱张信2, 刘德学2   

  1. 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
  • 收稿日期:2021-05-15 出版日期:2021-11-25 发布日期:2021-12-08
  • 通讯作者: 刘德学,教授,博士生导师,E-mail:dexeliu@hotmail.com
  • 作者简介:高 昂(1996—),男,硕士研究生,主要研究方向为耐蚀材料,E-mail:806958033@qq.com

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

Gao Ang1, Qian Zhangxin2, Liu Dexue2   

  1. 1. School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou Gansu 730050, China;
    2. Jiuquan Iron and Steel(Group) Co., Ltd., Jiayuguan Gansu 735100, China
  • Received:2021-05-15 Online:2021-11-25 Published:2021-12-08

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。

关键词: 固溶处理, 254SMO不锈钢, σ相, 铸态组织

Abstract: 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 the σ phase 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 the σ phase gradually dissolves and transforms into δ phase (ferrite). The optimum solid solution treatment process is 1280 ℃×9 h.

Key words: solid solution treatment, 254SMO stainless steel, σ phase, as-cast microstructure

中图分类号: