Journal of Advanced Marine Engineering and Technology

The Korean Society of Marine Engineering (한국마린엔지니어링학회)
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A Study on the Effect of Preheating in Cold AC Arc Welding Process of the Cast Iron

주철의 냉간 시공 교류아크용접에서 예열효과에 관한 연구

  • Published : 2007.09.30
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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.

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References

  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