摘要
为降低热管散热器铝制翅片与铜热管之间的传热热阻从而改善散热器的性能,研究了铝制翅片与铜热管之间的低温钎焊连接工艺。提出通过表面电镀Ni/Sn镀层的方法来改善低温钎料在铝板表面的润湿性能。采用Sn-3Ag-0.5Cu(简称SAC)钎料焊接电镀Ni/Sn铝板,结果表明,采用这一工艺方法可以实现铝板与铝板以及铝板与铜之间的低温钎焊连接,所获得的Al-Al搭接接头的抗剪强度为20.4 MPa,Cu-Al搭接接头的抗剪强度为26.2 MPa,可以满足散热器铝制翅片的焊接强度要求。
To decrease its thermal resistance,the low temperature soldering process for Al fins and Cu thermotube interconnection in the heatsink was developed.The electroplating process was used to deposit Ni/Sn onto the surface of Al fins to increase the wettability of solder materials on Al fins surface.The shear strength of Al/Al joint soldered with SAC solder is 20.4 MPa as well as the shear strength of 26.2 MPa for Cu/Al joint,which can meet the strength requirement of fin interconnections in Al heatsink.
出处
《焊接》
北大核心
2013年第1期22-24,69,共3页
Welding & Joining
关键词
铝制翅片
镀层
低温钎焊
Al fins
electroplating layer
low temperature soldering
