屏蔽型核主泵电机定子屏蔽套密封焊接技术研究

摘要

Can is the critical part of canned nuclear reactor coolant pump motor. This article mainly analyzes the construction of stator can circumferential weld and weldability of can material Hastelloy C276 so far as to provide proper technology method solving difficulty in welding process. A whole technology procedure for can circumferential welding had been summarized and applied in canned RCP motor manufacturing by means of improvement of material cleaning, impulse current applied, back inactive gas shielding, cooling copper chill ring and adjustment position of tungsten electrode and welding wire.%屏蔽套作为屏蔽式核主泵电机的核心部件至兲重要,本文着重分析了定子屏蔽套环焊缝的结构特性、材料焊接特性.针对焊接过程的技术难点,采取合理的工艺措施方法加以避免和解决.通过材料清洁、使用脉冲焊接、背部惰性气体保护、使用冷却铜环、钨极焊丝位置调节等工艺过程改善和控制,形成一整套定子屏蔽套环焊缝的焊接工艺方法.