フラックス入りワイヤによる水カーテン式水中炭酸ガスアーク溶接について(第 1 報) : 単層突合せ溶接

概要

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We have proposed the water curtain type underwater CO_2 arc welding as a method of underwater welding. With this method we could make nozzle-to-work distance longer than 2∿3 times compared with that for conventional underwater CO_2 arc welding because of good shielding effects. But, in case of welding with solid wires, welding speed was limited up to 30cm/min. For the purpose of solution to this trouble, we tried single pass butt welding on mild steel at 0.3m underwater by using flux cored wires. Results obtained are as follows : 1) At high speed welding 120cm/min as underwater welding, we succeeded to get good welds without blowholes and cracks. 2) The welds obtained from this method have excellent mechanical properties at bending test and tensile test. 3) Maximum hardness in welds was Hv 300. 4) This method had a weak point of poor visibility in the cause of melting of flux and slag into the water.
社団法人溶接学会の論文
1974-01-25