车轩,宫文彪,李于朋,周志洋

• 1:长春工业大学教育部先进结构材料重点实验室
• 2:长春工业大学材料科学与工程学院

摘要(Abstract)：

采用冷金属过渡焊接(Cold metal transfer welding, CMT)对4 mm厚的410不锈钢进行焊接，焊后对CMT接头进行搅拌摩擦加工(Friction stir processing, FSP)。采用光学显微镜、扫描电镜、万能试验机和显微硬度仪等研究了CMT接头和FSP后接头的表面形貌、微观结构和力学性能。结果表明：410不锈钢CMT接头经过FSP处理后，接头焊缝表面成型良好，内部无孔洞等缺陷，焊缝由大尺寸的柱状晶转变为细小的等轴晶，平均晶粒尺寸由155.07μm减小到17.78μm,大角度晶界比例从41.3%显著增加到67.19%;FSP接头焊核区的平均硬度达到300 HV0.2,抗拉强度为575.48 MPa,相比CMT焊接接头(514.27 MPa)提升了12%,伸长率从10%降至6%。

关键词(KeyWords)： 不锈钢;冷金属过渡焊接;搅拌摩擦加工;微观组织;力学性能

Abstract:

Keywords:

基金项目(Foundation): 吉林省自然科学基金(YDZJ202501ZYTS351)

作者(Author): 车轩,宫文彪,李于朋,周志洋

DOI: 10.13289/j.issn.1009-6264.2025-0039

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