Hydrogen in Electroslag Weld Metal

Abstract

In this study, diffusible hydrogen in electroslag weld metal changing the polarity was determined by IIW-hydrogen determination method after sampling from molten weld metal by vacuum quartz tube. Residual hydrogen was measured by hot vacuum extraction method at 650°C after diffusible hydrogen determination.
The obtained results are as follows;
1) Hydrogen content in electroslag weld metal is not influenced by welding polarity, welding current and basicity of flux.
2) Hydrogen content in electroslag weld metal decreases as the increase of CaF₂ contents in flux.
3) Hydrogen distribution in electroslag welded joint was higher content at the starting part and lower content at the end part.