• 동력기계공학회지
• /
• 제11권1호
• /
• pp.107-114
• /
• 2007

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 UWEB. 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.

• 대한용접접합학회:학술대회논문집
• /
• 대한용접접합학회 1992년도 특별강연 및 춘계학술발표 개요집
• /
• pp.69-71
• /
• 1992

• 대한조선학회 특별논문집
• /
• 대한조선학회 2006년도 특별논문집
• /
• pp.128-133
• /
• 2006

Generally, porosity which was formed by pyrolysis of the primer is usually generated in the weld metal in respect of increase of the welding speed. in order to analyze the cause of porosity generation, this study was performed using FCAW(flux cored arc welding) process for three kinds of inorganic.zinc primer. in addition the evaluation by influence of welding method on porosity generation is conducted to compare between FCAW and MAG(metal active gas) welding with the same inorganic zinc primer. As the result of this investigation, not only primer of lower organic binder and zinc but also FCAW process than MAG in fillet welding have been verified the excellent resistance to the porosity generation for horizontal fillet welding.

• 해양환경안전학회지
• /
• 제21권2호
• /
• pp.194-199
• /
• 2015

본 연구에서는 도그 피스 설치량에 따른 용접 변형 실험을 수행하여 용접 변형 감소 효과를 정량적으로 평가하였고, 도그 피스 설치를 고려한 용접 변형 해석 방법을 제안하였다. 용접 변형 실험 결과, 도그 피스 설치량이 증가할수록 용접 변형이 감소하며 최대 74%의 변형 감소 효과가 있음을 확인하였다. 원판형 열속 모델을 사용한 열탄소성 유한요소 해석을 활용하여 도그 피스 설치를 고려한 용접 변형 해석 방법을 제안하고, 해석 결과와 실험 결과가 좋은 유사성을 보이고 있음을 확인하였다. 본 해석 방법은 현행 도그 피스 설치량에 대한 적정 여부를 평가하거나 도그 피스 사용량을 절감할 수 있는 설치 가이드를 마련하기 위한 해석적 툴로 활용될 수 있다.

• Journal of Welding and Joining
• /
• 제13권2호
• /
• pp.53-59
• /
• 1995

• 대한용접접합학회:학술대회논문집
• /
• 대한용접접합학회 1999년도 특별강연 및 춘계학술발표대회 개요집
• /
• pp.156-160
• /
• 1999

• 대한용접접합학회:학술대회논문집
• /
• 대한용접접합학회 2003년도 춘계학술발표대회 개요집
• /
• pp.131-134
• /
• 2003

• 대한용접접합학회:학술대회논문집
• /
• 대한용접접합학회 1995년도 특별강연 및 춘계학술발표 개요집
• /
• pp.99-102
• /
• 1995

• 한국산학기술학회:학술대회논문집
• /
• 한국산학기술학회 2011년도 춘계학술논문집 2부
• /
• pp.683-686
• /
• 2011

The effect of welding material such as welding wires and materials for contact tip on the contact tip wear was investigated. Two types welding wires such as solid and flux cored wire and a variety of contact tips made of Cu-P, Cu-Cr(0.25%), Cu-Cr(1%) and Cu-Cr-Zr were employed for the comparison of wear resistance. It was found that the wear resistance of contact tips materials was Cu-Cr-Zr, Cu-Cr(1%), Cu-Cr(0.25%), Cu-P in order while the solid wire had a better wear resistance than flux cored wire.

• Journal of Welding and Joining
• /
• 제18권6호
• /
• pp.68-73
• /
• 2000

In case of overalyered wrapping roll, beadmark shape appear at wrapping roll surface due to irregular wear between weld bead. Irregular wear of this is caused by difference of hardness between weld bead. This study aims at investigating which matrix is good for removing of beadmark at wrapping roll surface. So, we make specimen with martensitic matrix and austenitic matrix. The overlayered alloys were deposited 4 times on a SS41 steel plate using self-shielding flux cored arc welding method. Difference of hardness between weld bead of specimen with matrix of martensite was higher than specimen with matrix of austenite both as-welded and after heat treatment. Therefore, austenitic matrix is between than martensitic matrix for removing of beadmark of wrapping roll surface.