Sr,Ti对Al-Si-Zn钎料6061铝合金钎焊接头组织的影响(英文)  

Study on Microstructure of 6061 Aluminum Alloy Brazed with Al-Si-Zn Filler Metals Bearing Sr and Ti

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,江苏南京210016 [2]浙江新锐焊接材料有限公司,浙江嵊州312452

出　　处：《稀有金属材料与工程》2013年第12期2442-2446,共5页Rare Metal Materials and Engineering

基　　金：Foundation of Scientist and Technician Serve the Enterprise;The Ministry of Science and Technology,China(2009GJC20040)

摘　　要：制备了Sr及Ti变质的Al-Si-Zn钎料,并将其应用于6061铝合金的钎焊,研究Sr及Ti对Al-Si-Zn钎料6061铝合金钎焊性能的影响。结果表明:锌的加入使得钎料熔点由铝硅共晶温度下降至520℃左右。添加少量改性元素Sr及细化晶粒元素Ti,极大优化了钎料中Al-Si共晶的形态与分布,同时也细化了钎料中的α-Al固溶体。向钎料中添加0.08%Ti元素,使得原来Al-Si-Zn-Sr-0.04Ti钎料钎缝中大块团簇状的铝硅共晶均匀分布于α-Al固溶体之间。在6061铝合金钎的焊界面处可以发现较为明显的过渡层,由于钎焊过程中母材元素发生了向钎料中扩散,母材中的锰元素与钎料中的铁杂质生成块状锰铁相避免了针状β-Fe的生成。The novel Al-Si-Zn filler metals containing Ti and Sr were used for brazing of 6061 aluminum alloy. The results indicate that the addition of Zn into the Al-Si filler metal lowers the solidus temperature from 583 ℃ to around 520 ℃. The minor addition of modification element Sr and refine element Ti into Al-Si-Zn alloy WILL cause the remarkable modification of Al-Si eutectic and the a-Al phase is also refined. The main phases in the filler metals as well as the brazed seams are a-Al, η-Zn, and Si phases. The large clusters ofAI-Si eutectic in the Al-Si-Zn-Sr-0.04Ti brazed seam are refined by further adding 0.08 wt% Ti, the refined Al-Si eutectie is homogeneously distributed among a-Al phase. Diffusion layers can be found in the brazed interface, the Mn-Fe phase is also found in the brazed seam due to the diffusion of 6061 base metal into the brazing alloy which is helpful for reduce the formation of acicular β-Fe.

关 键 词：钎焊 6061铝合金 Al-Si-Zn钎料 TI 

分 类 号：TG454[金属学及工艺—焊接]