摘要
Two kinds of silver based medium temperature brazing filler metals(45AgCuZnSn and 60AgCuSn) were selected to braze and seal brass flange pipe and copper pipe by high frequency heating brazing. In this paper, the quality of the braze was evaluated by immersion ultrasound, and the microstructure of the brazed joint was observed by SEM and EDS. The experimental results show that the high frequency heating brazing can quickly achieve the device sealing;through the ultrasonic flaw detection image calculation, the brazed bonding rate obtained by 60AgCuSn brazing is 87%, and by 45AgCuZnSn brazing is 71%;the cross-sectional area of the brazed joint obtained by two kinds of silver based medium temperature brazing filler metals is observed, the brazed joint obtained by 45AgCuZnSn brazing has defects visual, and a large amount of Zn element gathered in the defects, there is no obvious porosity in the brazed joint by 60AgCuSn brazing,and the bonding layer is dense and coherent. Through the contrast test, the choice of 60AgCuSn alloy brazing can meet the needs of high frequency brazing of brass flange pipe and copper pipe.
作者
Huang Xiaomeng
Song Wenjie
Qi Yuefeng
Liu Xu
Wang Wei
黄晓猛;宋文杰;齐岳峰;柳旭;王炜(Beijing Non-ferrous Metal and Rare Earth Research Institute,Beijing 100012;Beijing Engineering Technology Research Center of New Brazing Materials for Electronic Information,Beijing 100012)
基金
supported by the National Key R&D Program of China(Grant No. 2017YFB0305702)。
