Fe-Cr-Ni三元系溶接金属の窒素含量
Fe-Cr-Ni系溶接金属の窒素吸収に関する基礎的研究(第3報)
1971 年 40 巻 5 号 p. 448-458
詳細
1971 年 40 巻 5 号 p. 448-458
The nitrogen contents of Fe-Cr-Ni weld metals deposited in the atmosphere of nitrogen or air were systematically determined. Some of them were compared with the solubility of nitrogen in the alloys concenred. The extent of porosity was also investigated. The main results are summarized as follows:
1. The nitrogen contents of weld metals were shown as a function of the sum of chromium and nickel content.
2. The nitrogen content of Fe-Cr-Ni weld metals were shown with contour lines of iso-nitrogen content in a ternary diagram.
3. Comparing the nitrogen contents of the Fe-Cr-Ni weld metals with the solubility of nitrogen determined by Humbert and Elliott at 1600°C, it is found that the high chromium weld metals are not saturated with nitrogen up to the solubility limit.
4. The blowholes in the weld metals seem to be reduced by increasing the chromium content of electrode wires.
