Cu元素对铝/铜钎焊用Zn-Al钎料性能的影响
Influence of Cu on Properties of Zn-Al Solders for Al/Cu Brazing
刘凤美， 杨凯珍， 刘师田， 刘正林
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作者单位：广州有色金属研究院，广东 广州510650
中文关键字：铝/铜钎焊；Zn-Al钎料；剪切强度；铺展性；熔化温度
英文关键字：Al-Cu brazing; Zn-Al solders; shear strength; wettability; melting point
中文摘要：研究了Cu元素对铝/铜钎焊用Zn-Al钎料的熔化温度、铺展性、接头剪切强度及焊缝组织的影响。结果表明，在Zn-10Al钎料中通过添加Cu元素，可以改善在铝表面上的铺展性能，却降低了在铜表面上的铺展性能，其熔化温度（液相点）降低。当添加一定比例的Cu元素时，可使焊缝中钎料层与铜母材之间界面的组织变细小，从而提高钎焊接头的剪切强度。Cu元素含量过高时，在靠铜侧钎料层会生成层状相。
英文摘要：The influences of copper on properties of Zn-Al solders for Al/Cu brazing, which include wettability, shear strength of joint, microstructure of weld and melting point were studied. The results show that Zn-Al solders, into which element of Cu was added, improve wettability on the surface of Al, but decrease it on the surface of Cu and also decrease the liquidus point. While adding certain ratio of copper into this type of solders, the shear strength of joint can be increased and the microstructure between solder layer and Cu becomes fine. When the content of element Cu is over high, the laminar phase can be formed near the side of Cu part.