| 摘要 |
PURPOSE:To prevent the generation of high temp. cracking in the state of gas shielded arc welding of dead soft steel by using a composite wire contg. a specific content of C. CONSTITUTION:In the case of subjecting steel contg. 0.005-0.06wt% C to gas shielded arc welding, at least the 1st layer thereof is welded by using a composite wire contg. 0.1-0.34wt% C. The content of C in the composite wire is determined by the iron powder, disoxidizing agent, alloying materials, graphite, carbonate, etc. of the sheath material and packed flux of the wire. Good results are obtained if the content of C in the wire is controlled beforehand according to specifications. |
