• Proceedings of the KWS Conference
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• 2001.10a
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• pp.60-61
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• 2001

• Journal of Welding and Joining
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• v.14 no.5
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• pp.40-48
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• 1996

• Proceedings of the KWS Conference
• /
• 2000.04a
• /
• pp.267-271
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• 2000

• Journal of Welding and Joining
• /
• v.12 no.3
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• pp.1-17
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• 1994

• Proceedings of the KWS Conference
• /
• 1996.10a
• /
• pp.160-162
• /
• 1996

• Proceedings of the KWS Conference
• /
• 1992.10a
• /
• pp.132-134
• /
• 1992

• Proceedings of the Korea Committee for Ocean Resources and Engineering Conference
• /
• 2004.11a
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• pp.283-287
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• 2004

Arc welding is sometimes used to repair damaged cast iron parts in diesel engine for driving a ship. In this case cola 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 repair working shop.

• Journal of Ocean Engineering and Technology
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• v.10 no.2
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• pp.69-76
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• 1996

In-process quality control and high reliability of the weld are the major concerns in applying friction welding to the economical and qualified mass-production. Experimental examinations and quantitative analysis were performed for the optimiaztion of similar friction welding of hydraulic valve spool steels(SNCM220, SCM435, SACM645, SCM415, ${\varphi}24). The quantitative correlations were found between the initial cumulative counts of acoustic emission(AE) occurring during plastic deformation periods of the welding and the fatigue life as well as weld strength and welding conditions. A real-time evaluation system was developed for the friction weld quality by AE.

• Proceedings of the KWS Conference
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• 2004.05a
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• pp.330-332
• /
• 2004

1970년대 구조용강의 경량화를 위해 합금 원소를 많이 첨가해 미세조직을 강화시킨 고강도강(high- yield)을 많이 사용했다. 하지만 탄소량의 증가로 저수소계 용접봉을 사용하고 예열과 후열처리 때문에 강재의 용접성과 생산성이 떨어졌다. (중략)

• Proceedings of the KWS Conference
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• 2006.05a
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• pp.118-120
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• 2006