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김민남(MIM-NAM KIM),김복인(BOK-IN KIM),한정동(JEONG-DONG HAN) 한국해양공학회 2000 韓國海洋工學會誌 Vol.14 No.4
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 specimens. and that of UWE-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 impact value of UWE-01 were about 15.5%, and those of UWE-02 were about 21.7% higher 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.