The Nitrogen Contents of Fe-Cr-Ni Weld Metals
Fundamental Study on the Nitrogen Absorption by Fe-Cr-Ni Weld Metals (Report 3)
1971 Volume 40 Issue 5 Pages 448-458
Details
1971 Volume 40 Issue 5 Pages 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.
