张秋征,宫文彪,刘杰

• 1:长春工业大学材料科学与工程学院
• 2:长春轨道客车股份有限公司

摘要(Abstract)：

采用搅拌摩擦焊对35 mm厚的6005A-T6铝合金分别进行单、双面对接焊接,对焊缝的微观组织、焊缝整体和沿厚度方向上的力学性能变化、焊缝的腐蚀电流密度和电位进行了研究。结果表明,单面焊焊核区的平均晶粒尺寸为9.14μm,双面焊为6.33μm。单、双面FSW焊缝前进侧与母材有明显的界面,两种焊缝接头均出现明显的软化;沿焊缝厚度方向单面焊的硬度最低点出现在焊缝根部,双面焊则出现在两次焊接的重合部位。单面焊接头的平均抗拉强度为182 MPa,为母材的65.9%;双面焊接头的平均抗拉强度为209 MPa,为母材强度的75.7%;双面焊焊缝的腐蚀电流密度低于单面焊而电位高于单面焊。

关键词(KeyWords)： 铝合金;搅拌摩擦焊;单面焊;双面焊;组织;性能

Abstract:

Keywords:

基金项目(Foundation): 吉林省科技厅高科技资助项目(20100362)

作者(Author): 张秋征,宫文彪,刘杰

DOI: 10.13289/j.issn.1009-6264.2014.06.014

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