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http://dx.doi.org/10.5781/KWJS.2008.26.1.050

A Characteristics of the Multiple Repair Welding HAZs in a Low Alloy-Steel(2.25Cr-1.0Mo)  

Lee, Chul-Ku (Dept. of Mechanical Engineering, Seoul National University)
Ahn, Jong-Seok (Power Generation Dept. Korea East-West Power Co., Ltd)
Lee, Nam-Hyuck (Power Generation Dept. Korea East-West Power Co., Ltd)
Lee, Gil-Jae (Power Generation Dept. Korea East-West Power Co., Ltd)
Publication Information
Journal of Welding and Joining / v.26, no.1, 2008 , pp. 50-55 More about this Journal
Abstract
A low alloy-steel(2.25Cr-1.0Mo) has been widely used for boiler piping, header and tubes in high temperature and pressure conditions of the thermal power plant. It is common knowledge that the repair welding is permitted two or three times by customary practice rule, but there is no regulation to limit the number of repair welding base on the study heat-affected zone(HAZ), which is the weakest zone when repair welding is under taken, by experiments about the metallographic degradation and mechanical properties. Therefore, this study aims to verify the reliability of 5 times repair welding through conducting the experimental observation in the mechanical and the metallographic change on HAZ varying repair welding times. In results of the experiments, it is concluded that the reliability was kept in HAZ even up to the fifth repairs.
Keywords
Thermal power plant; Low alloy-steel; Heat-affected zone; Metallographic degradation;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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