Ar-CO_2雰囲気における鉄溶接金属の酸素吸収について : アーク溶接過程における鉄溶接金属の酸素吸収について(第2報)

概要

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Pure iron was welded in controlled arc atmosphere. Effects of the welding conditions and the partial pressure of carbon dioxide in Ar-CO_2 welding atmosphere on the oxygen content of iron weld metal were systematically studied. The results are summarized as follows : 1. The oxygen content of iron weld metal decreases with increasing welding current and increases with increasing arc voltage. 2. The oxygen content of iron weld metal increases with the partial pressure of carbon dioxide in Ar-CO_2 welding atmosphere. The oxygen content of iron weld metal in Ar-CO_2 welding atmosphere is smaller than that in Ar-O_2 welding atmosphere. 3. The carbon content of iron weld metal increases with the partial pressure of carbon dioxide in Ar-CO_2 welding atmosphere. The carbon content of iron weld metal is about 0.027 wt.% under the welding current of 250 A in carbon dioxide welding atmosphere. 4. The high partial pressure of carbon dioxide, blow holes are observed in iron weld metal. 5. Behaviour of oxygen absorption into iron weld metal is discussed by using equilibrium data.
社団法人溶接学会の論文
1983-05-05