| 焊后低温热处理对马氏体不锈钢组织和性能的影响 |
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| 引用本文： | 史顺望,刘波,穆磊,姜宏伟,葛荣凡.焊后低温热处理对马氏体不锈钢组织和性能的影响[J].金属热处理,2020,45(12):136-139. |
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| 作者姓名： | 史顺望 刘波 穆磊 姜宏伟 葛荣凡 |
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| 作者单位： | 重庆水泵厂有限责任公司, 重庆 400030 |
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| 摘 要： | 对ZG06Cr13Ni4Mo马氏体不锈钢进行了焊后低温热处理工艺试验(240、300 ℃),通过显微组织分析、拉伸及弯曲试验、硬度试验及残余应力测试对不同低温热处理下焊接接头的显微组织、力学性能、硬度和残余应力等进行了研究。结果表明,经低温热处理后,接头焊缝热影响区组织为回火马氏体及碳化物,接头焊缝区的组织为低碳马氏体+块状马氏体+碳化物,接头的抗拉强度变化不大,硬度略有下降,经240 ℃低温热处理后,焊接接头焊缝处的残余应力消除了69.1%。
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| 关 键 词： | 马氏体不锈钢 低温热处理 力学性能 残余应力 |
| 收稿时间： | 2020-08-01 |
Effect of low temperature heat treatment after welding on microstructure and properties of martensitic stainless steel |
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| Shi Shunwang,Liu Bo,Mu Lei,Jiang Hongwei,Ge Rongfan.Effect of low temperature heat treatment after welding on microstructure and properties of martensitic stainless steel[J].Heat Treatment of Metals,2020,45(12):136-139. |
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| Authors: | Shi Shunwang Liu Bo Mu Lei Jiang Hongwei Ge Rongfan |
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| Affiliation: | Chongqing Pump Factory Co., Chongqing 400030, China |
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| Abstract: | Low temperature heat treatment (240 and 300 ℃) of ZG06Cr13Ni4Mo martensitic stainless steel after welding was carried out. The microstructure, mechanical properties, hardness and residual stress of the joints after different low temperature heat treatments were studied by means of OM, tensile and bending test, hardness test and residual stress test. The results show that after low temperature heat treatment, the microstructure of the HAZ of the joints is tempered martensitic and carbide, and the microstructure of the welding zone is low carbon martensitic, block martensitic and carbide. Meanwhile, the tensile strength of the joints varies little, and the hardness decreases slightly. The residual stress at welding zone of the joint after 240 ℃ low temperature heat treatment is relieved by 69.1%. |
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| Keywords: | martensitic stainless steel low temperature heat treatment mechanical properties residual stress |
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