| 摘要 |
PROBLEM TO BE SOLVED: To provide a welding method for a duplex stainless steel with low nitrogen content, such as SUS329 J1, which prevents weld cracking and a reduction in corrosion resistance by improving a weld metal structure.SOLUTION: This invention relates to a welding method for a duplex stainless steel which is used as a base material 1 and contains, by mass%, less than 0.08% of nitrogen. In this welding method, an electric voltage is applied between the base material 1 and a weld material 2 to generate an arc therebetween. Thus, when an arc is generated between the base material 1 and the weld material 2, the weld material 2 is melted by intense arc heat, and the molten droplet is transferred to the base material 1 so that a weld metal 4 containing, by mass%, 0.17-0.40% of nitrogen is formed on the base material 1. |
