A Study on Characteristics of Repair Welding for Cast Iron Part of Diesel Engine for Ship

J. Ocean Eng. Technol. 2006;20(2):41-45.

Kim Jin-Gyeong;Kang Myung-Shin;Kim Young-Sik;

Korea Institute Maritime and Fisheries Technology;Graduate Shoot, Korea Maritime University;Korea Maritime University;

선박용 디젤기관의 주철부품 보수용접 특성에 관한 연구

김진경;강명신;김영식;

한국해양수산연수원;한국해양대학교 대학원;한국해양대학교;

Keywords: Ni-electrode, NiFe-electrode, Heat affected zone(HAZ), Hardness, Blow hole

핵심용어: 니켈계 용접봉, 니켈-철계 용접봉, 용접열영향부, 경도, 기공

Abstract

Arc welding is sometimes used to repair damaged cast iron parts in diesel engine for driving n ship. In this case cold arc welding is good for saving the time and results in good repairing. But if some difference in hardness on welding zones made with AWS E Ni-CI and NiFe-CI happen, repaired parts would be cracked in a short. In order to overcome this default, the study is performed on varying preheating temperature of welding parts, selecting welding rod and welding work way. The result will be used on ship's working shop.