Cu-P变质对Al-Si-Zn钎料钎缝组织的影响  

Microstructure of Al-Si-Zn filler metal and brazed seam modified with Cu-P

作　　者：戴玮[1] 薛松柏[1] 孙波 娄江 王水庆 

机构地区：[1]南京航空航天大学材料科学与技术学院,南京210016 [2]浙江新锐焊接材料有限公司,嵊州312452

出　　处：《焊接学报》2013年第11期53-56,115-116,共4页Transactions of The China Welding Institution

基　　金：科技部科技人员服务企业行动资助项目(2009GJ20040)

摘　　要：研究了Cu-P合金变质对Al-Si-Zn钎料6061铝合金钎缝组织及性能的影响.结果表明,Cu-P变质能提高Al-Si-Zn钎料接头的抗拉强度,并且在Cu-P合金添加量为1.5%时达到最大值144 MPa.P元素的加入不仅能变质初晶硅及共晶硅,还能细化钎料基体.变质后的钎料合金中,初晶硅以AlP为衬底生长,使得初晶硅明显细化,同时磷的加入使得Al-Si共晶点偏移,初晶硅数量增多.变质前后的两种钎料的6061铝合金钎焊接头微观组织分析结果表明,Al-Si-Zn钎料6061铝合金钎缝由α-Al,η-Zn,硅颗粒组成,变质后的6061铝合金Al-Si-Zn钎缝组织中大块初晶硅消失,产物主要为α-Al,η-Zn,小块状硅颗粒、AlP相.The effect of Cu-P modification on the microstructure of Al-Si-Zn filler metal and 6061 aluminum brazed joints were investigated. Experimental results showed that the tensile strength of 6061 aluminum brazed joints were improved by Cu-P addition,and the highest value was achieved at 144 MPa when the content of Cu-P was 1. 5%. A small amount of P addition can modify the primary Si and refine α-Al in the filler metal. Primary Si growth based on the finely AlP phases were induced by Cu-P addition,and the size of primary Si was much smaller than that without P. Meanwhile,after P addition,the eutectic point of Al-Si moves to the Si side. It can be found that the phases in Al-Si-Zn brazed 6061 aluminum joint are α-Al,η-Zn,and Si particles,and the phases in Al-Si-Zn-Cu-P brazed seam are α-Al,η-Zn,fine Si particles,AlP phase.

关 键 词：变质处理 钎焊 6061铝合金 硅 

分 类 号：TG425[金属学及工艺—焊接]