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J. Ocean Eng. Technol. 1987;1(2):67-73.    

An Experimental Study on Underwater Wet Arc Welding and Weldability
TMCP강의 수중 ARC용접 실험과 용접성
오세규,김민남
부산수산대학 박용기계공학과,부산개방대학 기계공학과
© 1987 The Korean Society of Ocean Engineers     Open access / Under a Creative Commons License
Keywords: underwater et arc welding, welding condition, bead appearance, HAZ, hardness, mechanical properties
핵심용어: 습식수중아크용접, 용접조건, 비드외관, 열영향부, 경도, 기계적성질
Abstract
The feasibility for a practical use of underwater wet arc welding process is experimentally investigated by using low hydrogen and high oxide type electrodes and TMCP steel plates. Main results are summarized as follows: 1)The absorption speed of the coated low hydrogen and high titanium oxide type eletrodes becomes constant after about 30 minutes in water, and more steeping time in water does not influnce welding arc behavior. 2) By bead appearance and X-ray inspection, the high titanium oxide type electrode is better than the low hydrogen type in underwater arc welding process. 3) The mechanical properties of underwater wet arc welds depend upon welding conditions more than those of in-air welds, and the optimum welding condition can be obtained. 4) Because of quenching effect by rapid cooling rate in underwater wet welding, the maximum hardness of HAZ is increased relatively higher in underwater wet welding, process.


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