A Study of Mechanical Properties of Underwater Wet Welding Electrode

J. Ocean Eng. Technol. 2000;14(4):56-61.

습식 수중 용접봉의 기계적 성질에 관한 연구

김민남,김복인,한정동

부경대학교 기계공학부,부경대학교 대학원 기계공학부,부경대학교 대학원 기계공학부

Keywords: Underwater wet arc welding, Underwater welding electrode, HAZ, Weld metal, Mechanical properties

핵심용어: 습식수중 아크용접, 수중 용접용, 열 영향부, 용접금속, 기계적 성질

Abstract

This study has been performed for mechanical properties of underwater wet welding electrode with rolled steel (KR-RA) for ship structure, one kind (E 4313) of domestic covered arc welding electrode used in the air and two kinds (UWE-01, UWE-02) of underwater covered arc welding electrode experimentally developed on the same welding condition. The results obtained were as follows : The hardness value of underwater covered arc welding electrode (UWE-01) was about 8.3% lower than domestic covered arc welding electrode(E 4313) in heat affected zone of test of UWF-02 was lower about 4.5%. Tensile strengths of UWE-01 were about 0.9%, and those of UWE-02 were about 6.5% higher than those of domestic covered arc welding electrodes (E 4313) in test specimens. The impect value of UWE-01 were about 15.5%, and those of UWE-02 were about 21.7% highter than those of domestic covered arc welding electrodes(E 4313) in test specimens. So mechanical properties of the underwater arc welding electrode were improved by the composition ratios of covering materials