Method of welding high nitrogen containing stainless steel and welding material therefor

摘要

On a method of welding a high nitrogen containing stainless steel using, as a base metal, a high nitrogen stainless steel containing nitrogen at or above a solubility equilibrated with N2 at 1 atm when melted, a novel welding method keeping a weld metal composition from supersaturation of N in a molten state, having a sufficient corrosion resistance in an average composition of the weld metal under sea water circumstance and capable of maintaining mechanical characteristics and corrosion resistance comparable with those of a base metal is provided, wherein welding is conducted while setting a composition of a welding material and a dilution rate to be defined latter so as to satisfy the following two relations (A) and (B): 1 $\begin{array}{c}\%N^{p}xD\leqq 0.028x\left(\%{\mathrm{Cr}}^{p}xD+\%{\mathrm{Cr}}^{\text{'}}x\left(1-D\right)\right)+0.014\left(\%{\mathrm{Mo}}^{p}xD+\%{\mathrm{Mo}}^{F}x\left(1-D\right)\right)-0.0060x(\%\text{\&e}\end{array}$