电触头是电器开关中最关键的接触元件,多采用铜—钨、银—钨、银—碳化钨、铜—石墨等粉末冶金合金触头,这些触头材料都具有高导热导电性、耐磨性及耐电弧性能。所以在触头的焊接技术要求方面,除具有一定的焊缝机械强度以外,还须满足电器性能,如焊缝的导电导热性,低电阻率等。同时焊接后还要求装在产品上接受电压降测量、热稳 Electrical contacts are the most critical contact elements in electrical switches. They use copper-tungsten, silver-tungsten, silver-tungsten carbide, copper-graphite and other powder metallurgy alloy contacts. All of these contact materials have high thermal conductivity, Grinding and arc resistance. Therefore, the contact welding technology requirements, in addition to having a certain mechanical strength of the weld, but also to meet the electrical properties, such as the weld thermal conductivity, low resistivity. At the same time after welding also requires installed on the product to accept the voltage drop measurement, thermal stability