曲面の肉盛溶接方法及びそれを用いたランスの製造方法

摘要

A curved surface weld overlay method comprises: a first step of tack welding either steel or stainless steel netting material (29-31) in weld regions which are formed in the outer side of a bent portion (16) in the radial direction at the inner part of an inner pipe (14) of a lance, which is formed in whole or in part from a curved surface; and a second step of carrying out an overlay weld with a metal having heat and abrasion resistance upon the netting material (29-31) and forming overlays (19-21) in the weld regions. It is thus possible to smoothly carry out on an inner-side surface of a steel structure having a curved surface (for example, a pipe having a bent portion) an overlay weld with a metal having heat and abrasion resistance.