| 摘要 |
PURPOSE:To develop a flux cored wire for arc welding which does not contain any harmful hydrogen source material and has stable feedability by coating a mixture of a solid lubricant such as graphite or molybdenum bisulfide and glass powder on the surface of a wire for arc welding. CONSTITUTION:A mixture of 1 or both of graphite and molybdnum bisulfide and 10-60wt% glass powder is coated as a lubricant on the surface of a flux cored wire for gas shielded arc welding at 5X10<-2>-5X10<-4>% ratio based on the weight of the wire. Both graphite and molybdenum bisulfide have excellent characteristics as a solid lubricant and since no hydrogen sources are contained in the covering material, there is no generation of pits and blow holes in weld metal by hydrogen and the wire has excellent feedability. |
