摘要
采用预先高频钎焊钯合金管过渡接头,再使用脉冲激光焊的方法,对钯合金扩散室密排列钯合金管束与不锈钢法兰进行了密封焊接工艺研究,通过对激光焊接接头的观察和气密性检测分析,确定了激光焊接功率、离焦量、脉冲频率、脉冲宽度及焊接速度等主要焊接参数。正式样件经气密性检测和氦质谱检漏达到了氢纯化分离用钯扩散装置的使用要求,从而确定激光焊技术可推广应用于钯合金扩散室密集阵列管束批量焊接生产。
A study on the sealing welding process between palladium alloy tube bundles and stainless steel flanges in a densely arranged palladium alloy diffusion chamber was conducted using pre-brazed palladium alloy tube transition joints and pulsed laser welding method.Through the observation of the welded joint and the gas tightness test analysis,the main welding process parameters such as laser welding power,defocusing amount,pulse frequency,pulse width,welding speed,etc.were determined.The formal sample has met the requirements for the use of a palladium diffusion device for hydrogen purification and separation through gas tightness testing and helium mass spectrometry leak detection.It is confirmed that laser beam welding technology can be popularized and applied to batch welding production of dense array tube bundles in palladium alloy diffusion chamber.
作者
贾志华
郑晶
操齐高
姜婷
孟晗琪
JIA Zhihua;ZHENG Jing;CAO Qigao;JIANG Ting;MENG Hanqi(Northwest Institute for Nonferrous Metal Research,Xi'an 710016,Shaanxi,China)
关键词
钯合金管
激光焊接
扩散室
工艺参数
palladium alloy tube
laser welding
diffusion chamber
process parameters
