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http://dx.doi.org/10.5916/jkosme.2007.31.6.729

A Study on the Effect of Preheating in Cold AC Arc Welding Process of the Cast Iron  

Kim, Jin-Gyeong (한국해양수산연수원 교육연구처)
Kim, Young-Sik (한국해양대학교 공과대학)
Yu, Dae-Won (㈜종합 폴스타)
Publication Information
Journal of Advanced Marine Engineering and Technology / v.31, no.6, 2007 , pp. 729-735 More about this Journal
Abstract
AC cold arc welding process with AWS E Ni-CI and NiFe-CI is sometimes used to repair damaged cast iron parts in diesel engine room. But if some difference in hardness on welding zones, repaired parts would be cracked in a short. To overcome this default. this study is performed on varying preheating temperature of welding parts, selecting welding rod etc. Experimental results showed that difference in hardness on welding zones at $200^{\circ}C$ was less than $100^{\circ}C$ and less low current than high current. From this study we could conclude that repair welding at $200^{\circ}C$ preheating and low current as possible as welding in damaged cast iron parts was a little difference in hardness on welding zones.
Keywords
Ni-Electrode; NiFe-Electrode; HAZ; Hardness; Blow Hole;
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  • Reference
1 Nikuma, Soejima, Point of Cast Steel and Cast iron welding, Gendaiyosetsugijutsu-daikei(No. 25), pp.108-109, Sanpo publishing Co. Ltd. Tokyo, 1980
2 Committee on Welding Iron Castings, Guide for Welding Iron Castings, pp.4-6, AWS, 1989