锌铝药芯钎焊丝钎焊铝/铜接头性能及组织  

Properties and microstructures of the Al/Cu joints brazed by Zn-Al flux cored wires

作　　者：邹家生[1] 杨芬[1] 许祥平[1] 

机构地区：[1]江苏科技大学先进焊接技术省级重点实验室,江苏镇江212003

出　　处：《江苏科技大学学报（自然科学版）》2013年第5期444-448,共5页Journal of Jiangsu University of Science and Technology:Natural Science Edition

基　　金：镇江市国际科技合作项目资助(GJ2010006)

摘　　要：采用5种不同成分的锌铝药芯钎焊丝钎焊铝/铜接头,研究钎料成分对接头剪切强度和耐蚀性的影响.研究结果表明:对于同成分的锌铝药芯钎焊丝,采用火焰钎焊的铝/铜接头抗剪强度比炉中钎焊高,Zn80Al20药芯钎焊丝钎焊的铝/铜接头强度最高;随钎料中Al含量降低,铝/铜接头的耐蚀性变差,Zn72Al28药芯钎焊丝钎焊的铝/铜接头耐腐蚀性最好.相同条件下,火焰钎焊铝/铜接头的耐蚀性明显好于炉中钎焊的接头;Zn80Al20药芯钎焊丝钎焊的铝/铜接头钎缝组织呈块状.锌铝药芯钎焊丝中适中的Zn,Al含量有利于使铝/铜接头铜侧界面得到固溶体组织,并避免铝侧母材的过度熔蚀.Five kinds of Zn/Al flux cored wires with different compositions were used to braze Al/Cu joints,and the joints’ shear strengths and corrosion resistances which were affected by compositions were studied. It is shown that for the Zn/Al flux cored wires with the same compositions,the shear strength of the joint brazed by flame brazing is higher than furnace brazing,and the shear strength of the joint brazed by Zn80Al20 flux cored wire is the highest. The corrosion resistance of Al/Cu joint gets worse with the decrease of Al in the solder and that of Al/Cu joint brazed by Zn72Al28 flux cored wire is the best. Under the same conditions,the corrosion resistance of Al/Cu joint brazed by flame brazing is obviously better than furnace brazing and the microstructure of Al/Cu joint brazed by Zn80Al20 flux cored wires is massive. Moderate contents of Zn and Al in the Zn/Al flux cored wire are beneficial to gain solid solution structure in the Cu side of Al/Cu joint and avoid the excessive corrosion of base metal in the side of Al.

关 键 词：ZN-AL钎料 药芯钎焊丝 铝 铜接头 剪切强度 微观组织 

分 类 号：TG115.6[金属学及工艺—物理冶金]