我厂高压开关产品中有一种密度继电器,它是由铍青铜波纹管和Hp_b59-1黄铜座焊接而成。焊后要求波纹管不退火,保持其母材原有的弹性,以使密度继电器能可靠的进行吸合、断开。并要求焊缝有良好的致密性,其漏率应小于10~(-10)托·升/秒,试压后不得有任何变形。针对上述技术要求,我们经过反复试验,最后 I plant a high-voltage switchgear in a density relay, which is made of beryllium bronze bellows and Hp_b59-1 brass seat welded together. After welding the bellows is not required to be annealed and the original flexibility of the parent metal is maintained so that the density relay can be reliably pulled and disconnected. And requires a good weld density, the leakage rate should be less than 10 ~ (-10) Torr · liter / sec, after the pressure test without any deformation. In response to the above technical requirements, we have repeatedly tested, and finally