| 摘要 |
PURPOSE:To execute sufficient dehydrogenation by allowing a nonmetallic inclusion having a specific grain size value or above to exist in the sheath of a seamless flux wire for welding after drawing. CONSTITUTION:The nonmetallic inclusion consisting of deoxidizing materials and various alloys larger than 5mum length of the inclusions in the longitudinal direction of the seamless flux wire for welding is formed into the sheath of said wire after drawing. The dehydrogenation in the flux of such welding wire is sufficiently executable by annealing at a low temp. The hydrogen brittleness, more particularly generation of low-temp. cracks in a weld zone are prevented if welding is executed by using the welding wire obtd. in such a manner. |
