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곽희환(H. H. Kwak),김창규(C. G. Kim),김민남(M. N. Kim) 한국동력기계공학회 2004 한국동력기계공학회 학술대회 논문집 Vol.- No.-
Underwater wet arc welds were experimentally performed on 11mm thick SS400 mild steel plate as base metal by using six different types of flux coated electrodes of 4.0mm diameter; KSKR, KSKT, USBL, JPUW, UWEA, and UWES. As results, the developed flux coated underwater electrode had a good weldability compared with other domestic terrestrial electrodes. By rapid cooling rate, the hardness value of HAZ were increased by quenching effects. Mechanical properties for the multi-pass butt-welding specimen are also tested experimentally. The feasibility of the developed underwater electrode was experimentally studied and the results achieved in this wet arc welds have shown that the developed wet welding electrode UWEB can have a degree of integrity.
선체용 압연 강판의 습식 수중 아크 용접부의 부식특성에 관한 연구
황성훈(S. H. Hwang),김창규(C. G. Kim),김민남(M. N. Kim),곽희환(H. H. Kwak) 한국동력기계공학회 2004 한국동력기계공학회 학술대회 논문집 Vol.- No.-
Underwater wet arc welds were experimentally performed on 11mm thick KR-RA steel plate by using six different types of flux coated electrodes of 4.0mm diameter, KSKR, KSKT, USBL, JPUW, UWEA, and UWEB. As results, In aspect of bead appearance, detachability of slag, spatter producing and arc stability JPUW was the best condition and UWEB obtained more superior weldability than KSKR and KSKT. In bond zone, the hardness distribution of underwater wet multi-pass butt-welding had high hardness value in the most electrodes and UWES was distributed to the hardness contribution of the most favorable and stability. Upon polarization test to measure the responsiveness of corrosion, the electrodes of UWEB was showed the most excellent degree because of the low open circuit dislocation.
선체용 압연강판의 습식 수중 아크용접부의 기계적 특성에 관한 연구
김창규(C. G. KIM),곽희환(H. W. KWAK),김민남(M. N. KIM) 한국동력기계공학회 2006 한국동력기계공학회 학술대회 논문집 Vol.- No.-
Underwater wet arc welds of rolled steel plate (SM41) where studied welding and mechanical properties macro and narrow than that of the other things. Tensile strength of UWEB obtained to 521.5㎫ and of USBL was 524.1㎫, but the highest elongation value was 4.68%(UWEB). Bending strength(1166.6㎫) of USBL is the largest and of UWEB in l047㎫, But diffraction(22.73㎜) of UWEB in large than that of USBL(22.63㎜). Impact value(l44.36J/㎠) of JPUW is the largest and of UWEB(l40J/㎠) come after.