Using self-developed-high-strength composite CuCrZr material which has characteristics of high thermal conductivity, high crack resistance, high hardness, abrasion resistance and explosion resistance.Adopt cold welding technology innovatively striving to achieve seamless welding on the spring contact. Solder joint without oxide，The material is stable and no welding scar，the strength of solder joints is 75% higher than that of heat welding。
