Welding method for thin-wall nickel base pipe and austenitic stainless steel pipe

The invention discloses a welding method for a thin-wall nickel base pipe and an austenitic stainless steel pipe. The method is a welding method for welding the thin-wall nickel base pipe and the stainless steel pipe in a closed welding cavity in an all-position automatic argon tungsten-arc welding mode. According to the method, a tungsten needle automatically walks, a welding pool is completely protected in an inert gas protection atmosphere, wire filling and self-melting are avoided, and a continuous, compact and defect-free welding seam is obtained. 本发明公开了一种用于薄壁镍基管与奥氏体不锈钢管的焊接方法；是一种在封闭焊接腔内全位置自动钨极氩弧焊焊接薄壁镍基管与不锈钢管的焊接方法；该方法通过钨针自动行走，将焊接熔池完全保护在惰性气体保护氛围中，不填丝自熔，获得连续、致密的、无缺陷的焊缝。