한국해양공학회:학술대회논문집 (Proceedings of the Korea Committee for Ocean Resources and Engineering Conference)
- 한국해양공학회 2003년도 추계학술대회 논문집
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- Pages.93-96
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- 2003
50kg급 고장력강 레이저용접부의 용접잔류응력 및 파괴인성 특성
The Characteristic of Residual Stress and Fracture Toughness on The Welded Joint of HT50 by Laser Welding
- 노찬승 (조선대학교 선박해양공학과 대학원) ;
-
방한서
(조선대학교 항공 해양공학부) ;
- 고민성 (조선대학교 선박해양공학과 대학원) ;
- 김성주 (조선대학교 선박해양공학과 대학원) ;
- 김하식 (조선이공대학 컴퓨터응용기계학부)
- Ro, Chan-Seung (Graduate School, Dept. of Naval Achitecture & Ocean Eng., Chosun Univ.) ;
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Bang, Han-Sur
(Division of Aerospace and Naval Architecture Eng., Chosun Univ.) ;
- Ko, Min-Sung (Graduate School, Dept. of Naval Achitecture & Ocean Eng., Chosun Univ.) ;
- Kim, Sung-Ju (Graduate School, Dept. of Naval Achitecture & Ocean Eng., Chosun Univ.) ;
- Kim, Ha-Sig (Division of Computer Applied Mechanics, Chosun College of Science & Technology)
- 발행 : 2003.10.24
초록
Laser beam welding process is a relatively new process in comparison with arc welding process, but it is expected to apply widely because of the many advantages, and research and development of that process is being progressed actively for the practical use. the application of this welding process has been restricted due to the high initial investment and the need of precise processing against the material, but cost reduction and thick plate welding in high speed have become practial by recent technological development, and this welding process to not only small parts in automobile, machinery and physicochemical field, but also a large structure and pipe line are being applied. In order to utilize this welding process appropriately to a steel structure, the properties of welding residual stresses and fracture toughness in welded joints are to be investigated for relibilty. On this study, after performing the finite element analysis, thermal and residual stress properties have been examined to the general structural steel (HT50) by laser beam welding. Besides, the property of fracture toughness has been investigated by the Charpy impact test and 3-points bending CTOD test carried out in the range of temperature between
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