高圧溶接雰囲気におけるステンレス鋼溶接金属の窒素吸収 : 高圧下における溶接金属の窒素吸収(第2報)

概要

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20Cr-10Ni stainless steel was welded in N_2 and N_2-Ar atmospheres at 1〜30 atm pressures. Effects of welding conditions and the nitrogen partial pressure on the nitrogen content of stainless steel weld metal were systematically studied. The results are summarized as follows : (1) In the nitrogen welding atmosphere, the nitrogen content of the weld metal decreased with increasing the welding current and increasing the travel speed, and with decreasing the arc voltage.(2) In the nitrogen welding atmosphere, the nitrogen content of the weld metal increased with the nitrogen pressure, but the nitrogen absorption of the weld metal does not obey the Sieverts' law.(3) In N_2-Ar welding atmosphere, the nitrogen content of the weld metal was lower in high atmospheric pressure than in low pressure at the same nitrogen partial pressure.(4) Using thermodynamic data obtained by equilibrium study, the nitrogen absorption into the stainless steel weld metal in the nitrogen atmosphere of high pressure was discussed.(5) All stainless steel weld metals had no porosity.
社団法人溶接学会の論文
1985-11-05