Behavior of Hydrogen in Arc Welding (Report 1) : Hydrogen Absorption in Tungsten Arc Melting

概要

論文の詳細を見る
A new technique is developed which allows the evaluation of the hydrogen content in molten metals. A specimen is melted by a tungsten electrode in Ar+H_2 mixture in a copper crucible and is enclosed in it immediately after an arc-off. Hydrogen evolved from the specimen is led to an oxidizing furnace and resulting water is accumulated in a cold trap as ice. The deposited ice is then evaporated to vapor which undergoes volumetric determination. The relation between hydrogen partial pressure in the arc atmosphere and absorbed hydrogen within P_<H_2>=0.2 atm in the melts of pure iron, low carbon steel, 1.7%Mn steel, 18-8 and 15-35 stainless steels is found to agree with Sieverts' law at 2000° to 2200℃. For all metals the gas contents are nearly the same if they are converted into the activity of hydrogen.
社団法人溶接学会の論文