水カーテン式水中炭酸ガスアーク溶接法の研究 : 軟鋼のすみ肉溶接

概要

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In case of the butt joint, previous report indicated that good welds were obtained by using the water curtain type CO_2 arc welding method. This paper presents the results of experimental investigation of the horizontal fillet welding used by the said method, and following conclusions were reached. 1) The water curtain type CO_2 arc welding method was also effectively available for underwater horizontal fillet joint. 2) Good welds without blowholes and cracks were obtained by selection of optimum welding conditions. 3) Welding speed used with flux cored wire faster about twice than that of used with solid wire. 4) From the results of studies on effect of O_2 mixing in Ar and CO_2 shileding gas, the hardness of welds decreased with the increace of oxygen content in case of solid wire. 5) The joint with root gap up to 2∿3mm did not affect the welding result.
1974-09-05