金属热处理 ›› 2023, Vol. 48 ›› Issue (11): 120-126.DOI: 10.13251/j.issn.0254-6051.2023.11.018

• 工艺研究 • 上一篇    下一篇

固溶处理对多股绞丝焊接S32205双相不锈钢焊接接头组织及性能的影响

陈泽方1, 彭康1, 陈希章1, 王琪晨2   

  1. 1.温州大学 机电工程学院, 浙江 温州 325035;
    2.烟台中集海洋工程研究院, 山东 烟台 264000
  • 收稿日期:2023-05-26 修回日期:2023-09-24 出版日期:2023-11-25 发布日期:2023-12-27
  • 通讯作者: 陈希章,教授,博士,E-mail:chenxizhang@wzu.edu.cn
  • 作者简介:陈泽方(1997—),男,硕士研究生,主要研究方向为新型绞股焊丝研发及金属热处理,E-mail:1365168276@qq.com。
  • 基金资助:
    国家自然科学基金(51975419)

Effect of solution treatment on microstructure and properties of welded joint of S32205 duplex stainless steel with multi-stranded wires

Chen Zefang1, Peng Kang1, Chen Xizhang1, Wang Qichen2   

  1. 1. School of Mechanical and Electrical Engineering, Wenzhou University, Wenzhou Zhejiang 325035, China;
    2. CIMC Offshore Engineering Institute Limited Company, Yantai Shandong 264000, China
  • Received:2023-05-26 Revised:2023-09-24 Online:2023-11-25 Published:2023-12-27

摘要: 针对多股绞丝焊接的S32205双相不锈钢焊接接头,进行1080 ℃固溶处理。采用电子背散射衍射、扫描电镜、电子万能试验机以及电化学试验等手段,对比分析了固溶处理对焊接接头显微组织、力学性能以及耐点蚀性能的影响。结果表明,经过1080 ℃固溶处理,焊接接头主要合金元素得到充分扩散,组织更均匀,焊缝奥氏体体积分数增加11.2%,两相比例更均衡;焊接接头的平均抗拉强度提高了32.7 MPa,塑性略有改善,同时焊接接头的耐点蚀性能也有明显的提高。

关键词: 固溶处理, S32205双相不锈钢, 焊接接头, 力学性能, 耐点蚀性能

Abstract: Solution treatment was performed at 1080 ℃ for S32205 duplex stainless steel welded joint welded with multi-stranded wire, and the effect of which on microstructure, mechanical properties and pitting corrosion resistance of the welded joint was analyzed by means of electronic backscatter diffraction, scanning electron microscope, electronic universal test machine and electrochemical test. The results show that after solution treatment at 1080 ℃, the main alloying elements of the welded joint are fully diffused, the microstructure is more uniform, the austenite volume fraction of the weld is increased by 11.2%, and the ratio of ferrite and austenite is more balanced. After the solution treatment, the average tensile strength of the welded joints increases by 32.7 MPa, the plasticity improves slightly, and at the same time, the pitting corrosion resistance of the welded joints is significantly improved.

Key words: solution treatment, S32205 duplex stainless steel, welded joint, mechanical properties, pitting corrosion resistance

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