超声波辅助Zn-14Al过共晶钎料钎焊Cu/Al接头显微组织演变规律研究
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摘要
采用固定间隙超声波辅助钎焊工艺制备了Zn-14Al过共晶钎料钎焊Cu/Al异质金属接头,研究了在不同钎焊温度和钎焊时间时Cu/Al钎焊接头显微组织的演变规律。研究结果表明:无钎剂超声波辅助钎焊接头冶金结合良好,钎焊温度至410℃时,铜界面润湿良好,产生不连续CuZn_5层;随着温度进一步升高,界面层连续化,并逐步向Al_(4.2)Cu_(3.2)Zn_(0.7)相转变;440℃时,Cu界面层完全转变为Al_(4.2)Cu_(3.2)Zn_(0.7)相;同时发现随着钎焊时间的延长,界面CuZn_5相也会向Al_(4.2)Cu_(3.2)Zn_(0.7)相转变。
引文
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[2]Yong Xiao,Hongjun Ji,Mingyu Li,et al.Ultrasound-induced equiaxial flower-like Cu Zn5/Al composite microstructure formation in Al/Zn-Al/Cu joint[J].Materials Science and Engineering A,2014,594:135-139.
[3]Mehta K P,Badheka V J.A review on dissimilar friction stir welding of copper to aluminum:process,properties,and variants[J].Materials and Manufacturing Processes,2016,31(3):233-254.
[4]Zhang Y,Li Y,Luo Z,et al.Feasibility study of dissimilar joining of aluminum alloy 5052 to pure copper via thermo-compensated resistance spot welding[J].Materials&Design,2016,106:235-246.
[5]Hoseini-Athar M M,Tolaminejad B.Interface morphology and mechanical properties of Al-Cu-Al laminated composites fabricated by explosive welding and subsequent rolling process[J].Metals and Materials International,2016,22(4):670-680.
[6]Skorb E V,Shchukin D G,M觟hwald H,et al.Ultrasound-driven design of metal surface nanofoams[J].Nanoscale,2010,2(5):722-727.
[7]Mendez PF,Rice CS and Brown SB.Joining using semisolid metals[J].Welding Res,2002,9:181-7.
[8]肖勇.超声波辅助Cu/Al液相钎焊接头冶金连接机制及性能研究[D].黑龙江哈尔滨:哈尔滨工业大学,2014.
[9]Murray J.The Al-Zn(aluminum-zinc)system[J].Journal of Phase Equilibria,1983,4(1):55-73.
[10]Sritharan K,Strobl C J,Schneider M F,et al.Acoustic mixing at low reynold’s numbers[J].Applied Physics Letters,2006,88(5):054102-054103.
[11]Liang H,Chang Y A.A thermodynamic description for the AlCu-Zn system[J].Journal of Phase Equilibria and Diffusion,1998,19(1):25-37.
[12]Ji F,Xue S B,Lou J Y,et al.Microstructure and properties of Cu/Al joints brazed with Zn-Al filler metals[J].Transactions of Nonferrous Metals Society of China,2012,22(281):281-287.