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Study on Microstructure of 6061 Aluminum Alloy Brazed with Al-Si-Zn Filler Metals Bearing Sr and Ti
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Study on Microstructure of 6061 Aluminum Alloy Brazed with Al-Si-Zn Filler Metals Bearing Sr and Ti
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Foundation of Scientist and Technician Serve the Enterprise; The Ministry of Science and Technology, China (2009GJC20040)

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    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

    Abstract:

    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 °C to around 520 °C. 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 α-Al phase is also refined. The main phases in the filler metals as well as the brazed seams are α-Al, η-Zn, and Si phases. The large clusters of Al-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 eutectic is homogeneously distributed among α-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

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戴 玮,薛松柏,孙 波,娄 江,王水庆. Study on Microstructure of 6061 Aluminum Alloy Brazed with Al-Si-Zn Filler Metals Bearing Sr and Ti[J].稀有金属材料与工程,2013,42(12):2442~2446.[Dai Wei, Xue Songbai, Sun Bo, Lou Jiang, Wang Suiqing. Study on Microstructure of 6061 Aluminum Alloy Brazed with Al-Si-Zn Filler Metals Bearing Sr and Ti[J]. Rare Metal Materials and Engineering,2013,42(12):2442~2446.]
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  • 收稿日期:2012-12-22
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