黄铜与304不锈钢的电阻软钎焊封装工艺

针对某热量表的温度传感器中由于尼龙成分的存在导致其构成材料黄铜和304不锈钢不能在高温下焊接的问题，采用电阻软钎焊的低温连接方法进行焊接试验，以实现密封连接效果. 结果表明，在0.3 MPa的焊接压力下，当焊接电流设定为26 kA时，以双层Sn-Pb箔片为钎料的焊件进行的试验效果良好，达到了可靠的连接，且黄铜中心尼龙成分未受到焊接温度的影响而损坏. 在扫描电镜下观察到钎料与不锈钢和黄铜均发生了表面扩散. 将焊接后的样品置于水中进行密封性试验，结果显示焊缝区域实现了可靠地连接，达到了密封防水效果.

Study on brass and 304 stainless steel packaging process by resistance soldering

Aiming at the failure to join for the constituent materials brass and 304 stainless steel using resistance soldering at high temperatures, due to the presence of a nylon component, welding experiments were conducted using low-temperature connection method of resistance soldering so as to achieve sealing effect. The results show that under the pressure 0.3 MPa and the welding current 26 kA, the joining with double-layer Sn-Pb foil as brazing filler is available, and the brass center nylon component is not damaged. Observed by scanning electron microscope, surface diffusion occurred between solder and stainless steel or brass. The results of sealing test in water show that the weld area is sealed and the waterproof effect is achieved.