| 254SMO不锈钢铸态组织及其高温固溶处理工艺 |
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| 引用本文： | 高昂,钱张信,刘德学.254SMO不锈钢铸态组织及其高温固溶处理工艺[J].金属热处理,2021,46(11):195-198. |
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| 作者姓名： | 高昂 钱张信 刘德学 |
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| 作者单位： | 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 |
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| 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。
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| 关 键 词： | 固溶处理 254SMO不锈钢 σ相 铸态组织 |
| 收稿时间： | 2021-05-15 |
As-cast microstructure and high temperature solution treatment process of 254 SMO stainless steel |
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| Gao Ang,Qian Zhangxin,Liu Dexue.As-cast microstructure and high temperature solution treatment process of 254 SMO stainless steel[J].Heat Treatment of Metals,2021,46(11):195-198. |
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| Authors: | Gao Ang Qian Zhangxin Liu Dexue |
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| Affiliation: | 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 |
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| 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. |
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| Keywords: | solid solution treatment 254SMO stainless steel σ phase as-cast microstructure |
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