唐志超,谢志雄,吴栅,徐靖雯,董仕节,解剑英

• 1:湖北隆中实验室
• 2:湖北工业大学绿色轻工材料湖北省重点实验室
• 3:武汉轻工大学机械工程学院
• 4:台州三孚新材料科技股份有限公司

摘要(Abstract)：

采用高频感应焊接技术对304不锈钢薄壁管进行焊接,利用光学显微镜、扫描电镜、电子探针、电子背散射衍射、显微硬度仪以及拉伸试验对焊接接头的微观组织和力学性能进行了研究。结果表明:利用高频感应焊接技术焊接304不锈钢薄壁管,获得了表面成形良好、无焊接缺陷的焊缝;焊接接头呈上下宽,中间窄的腰鼓状,接头宽度约为480μm,熔化区宽度约为340μm,由蠕虫状铁素体和等轴奥氏体组成,热影响区由骨架状铁素体和柱状奥氏体组成;熔化区晶粒细小,小角度晶界占比高;热影响区变形晶粒多,大角度晶界占比高;焊接接头的抗拉强度为797 MPa,达到母材的95%,伸长率稍低于母材;焊接接头显微硬度呈“M”形对称分布,热影响区硬度高是由于冷却过程中少量弥散强化的碳化物或氮化物析出所致。

关键词(KeyWords)： 304不锈钢;高频感应焊;微观组织;力学性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51771071);; 湖北省国际科技合作项目(2022EHB020);; 湖北隆中实验室自主创新项目(2022ZZ-17)

作者(Author): 唐志超,谢志雄,吴栅,徐靖雯,董仕节,解剑英

DOI: 10.13289/j.issn.1009-6264.2024-0405

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