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铜合金与不锈钢搅拌摩擦焊搭接接头组织与性能

任国春,黎宇航,高士友,徐杰

任国春,黎宇航,高士友,徐杰. 铜合金与不锈钢搅拌摩擦焊搭接接头组织与性能[J]. 焊接学报, 2018, 39(10): 88-92. DOI: 10.12073/j.hjxb.2018390254
引用本文: 任国春,黎宇航,高士友,徐杰. 铜合金与不锈钢搅拌摩擦焊搭接接头组织与性能[J]. 焊接学报, 2018, 39(10): 88-92. DOI: 10.12073/j.hjxb.2018390254
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REN Guochun, LI Yuhang, GAO Shiyou, XU Jie. Microstructure and mechanical properties of friction stir welding lap joint between copper alloy–stainless steel[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2018, 39(10): 88-92. DOI: 10.12073/j.hjxb.2018390254
Citation: REN Guochun, LI Yuhang, GAO Shiyou, XU Jie. Microstructure and mechanical properties of friction stir welding lap joint between copper alloy–stainless steel[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2018, 39(10): 88-92. DOI: 10.12073/j.hjxb.2018390254
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铜合金与不锈钢搅拌摩擦焊搭接接头组织与性能

Microstructure and mechanical properties of friction stir welding lap joint between copper alloy–stainless steel

摘要

    摘要
  • 摘要: 采用搅拌摩擦搭接焊对铜合金与不锈钢异种金属进行焊接，得到外观良好、无内部缺陷的搭接接头. 利用金相、扫描电镜、能谱仪、X射线衍射及硬度计等研究了铜–钢搭接焊接头显微组织，分析了接头的物相成分，测试了接头的显微硬度. 结果表明，不锈钢与铜在焊合区形成了“洋葱环”结构，此结构在焊核区的前进侧较后退侧更为均匀；在接头的前进侧、后退侧和底部有明显的热力影响区；在条状结构中形成了新的金属间化合物NiCu4，这使焊核区不锈钢–铜界面的硬度值明显增大；接头焊核区的硬度值明显高于基体，且焊核区前进侧的硬度值较后退侧更高.
    Abstract: The dissimilar metals of copper and stainless steel were jointed by friction stir lap welding (FSW) and no internal defects were obtained in the lap joints with good appearance. The microstructures and hardness of welded joint were investigated by optical microscopy (OM), scanning electron microscopy (SEM) equipped with energy disperse spectroscopy (EDS). The results show that the onion ring structure of stainless steel and Cu was observed in the welded nugget zone (SZ), which was more uniform in advancing side (AS) compared with retreating side (RS). New intercalations were observed in the layered structure and subsequently confirmed as NiCu4, for which untypically high hardness values were registered. The hardness of the welded joints in the welded nugget zone was significantly higher than that of the matrix, which was higher in the advancing side.
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    • 参考文献(20)
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  • 收稿日期:  2017-06-12

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