Ar-O_2,Ar-CO_2およびCO_2-O_2雰囲気における鋼溶接金属の酸素吸収について : ガス・メタル・アーク溶接における鋼溶接金属の酸素吸収について(第1報)

概要

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In an oxidizing gas welding atmosphere of Ar-O_2,Ar-CO_2 or CO_2-O_2 gas mixture, oxygen absorption behavior by steel weld metal has been investigated metallurgically, using a popular Fe-Si-Mn electrode wire and two types of base metal, that is, pure iron and rolled steel for welded structure. As an addition of oxygen to argon-based mixture, the oxygen content in steel weld metal extremely increases and the losses of alloying elements such as silicon and manganese steadily increase. As an addition of carbon-dioxide to argon-based mixture, the oxygen content in steel weld metal increases somewhat and limited amount of alloying elements losses. As an addition of oxygen to carbon-dioxide-based mixture, only a little amount of oxygen is absorbed into the steel weld metal. Despite the active gas of CO_2 instead of Ar adds into the welding atmosphere, unexpectedly, the oxygen content of steel weld metal under CO_2-O_2 is lower than that of the weld metal under Ar-O_2 for the same oxygen partial pressure over the range of 0.01 MPa. The losses of alloying elements are not so significant in this atmosphere.
社団法人溶接学会の論文
1992-08-05