摘要
研究了铜基非晶钎料液相的生成和铺展润湿过程。结果表明:非晶钎料由于熔化前固相扩散比较充分,使得钎料中的共晶组织被破坏,生成了大量高熔点的铜固溶体以及铜和镍的化合物,致使非晶钎料产生的液相相对晶态钎料少,因此液相铺展和流动过程较弱。而晶态钎料生成了大量液相,故液相的铺展和流动是晶态钎料钎焊的主过程。由于非晶态钎料非常薄,钎料中原子扩散距离短,有利于快速溶进基材;而普通钎料比较厚,溶解时间较非晶钎料长得多。随钎焊温度的升高和保温时间的延长,钎料残余层的厚度减小。在相同的钎焊温度和保温时间下,非晶态钎料残余层的厚度比晶态钎料小。
The formation, wetting and spreading process of the liquid amorphous filler metal were investigated. The results indicate that the eutectic phase of the amorphous filler metal is damaged and plenty of high melting-point copper solid solution and copper-nickel compound are generated due to the full solid-phase diffusion before melting. Therefore, relatively less liquid phase is produced by amorphous filler metal than crystalline filler metal and the liquid phase spreading and flow is weak. However, the crystalline filler metal generates a large amount of liquid phase. Spreading and flowing of the liquid phase is the main process of crystalline filler metal brazing. As the amorphous filler metal is very thin, the atomic diffusion distance is very short in the filler metal, which is quite favorable for the rapid dissolution into the base metals. The ordinary filler metal is relatively thick, and it tends to take longer time to dissolve than the amorphous filler metal. The thickness of the residual filler metal decreases with the increase of brazing temperature and dwell time. The thickness of the residual layer of amorphous filler metal is smaller than that of the crystalline filler metal under the same brazing temperature and dwell time.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2013年第4期688-691,共4页
Rare Metal Materials and Engineering
基金
The National Natural Science Foundation of China(50965012)
The Doctoral Foundation of the Lanzhou University of Technology(BS01200902)
关键词
非晶态钎料
钎焊
残余层
润湿铺展
amorphous filler metal
brazing
residual layer
wetting
spreading
