| 학회 |
한국재료학회 |
| 학술대회 |
2020년 가을 (11/18 ~ 11/20, 휘닉스 제주 섭지코지) |
| 권호 |
26권 1호 |
| 발표분야 |
D. 구조 재료 분과 |
| 제목 |
Low-temperature mechanical properties according to SAW welding of thick plate steel for offshore plants |
| 초록 |
Recently, offshore plants and ships are operating in extreme environments to develop energy resources in the polar region. In order to develop a suitable plant, high strength and low temperature toughness of steel are required. Accordingly, in the shipbuilding industry, the use of TMCP (Thermo-Mechanical Control Process) high-strength steel, which has advantages such as excellent economic efficiency, improved mechanical properties, and reduced carbon equivalent, is increasing. Welding is essential for the construction of offshore plants and ships, but SAW(Submerged Arc Welding) has an advantage of superior productivity compared to other multi-pass welding. However, due to the deep penetration of SAW, a wide HAZ (Heat Affected Zone) appears. It is necessary to study the properties of weld zone and HAZ, which have weaker mechanical properties than the base material. Therefore, this study performs to study the low temperature characteristics of TMCP high strength steel and SAW weld zone. In this study, a thick plate steel of 80mm thickness manufactured by TMCP was used as the base material, and SAW welding was performed. In order to investigate the effect of microstructure on the low-temperature impact toughness, the correlations between Charpy impact absorption energy and microstructure was studied under the conditions of from -60°C to 20°C. |
| 저자 |
최병찬1, 이상준2, 최동기1, 신상용2, 조성규3, 김양도4, 김형찬5
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| 소속 |
1한국생산기술(연), 2부산대, 3하이드로훼스트 기술(연), 4울산대, 5현대제철 R&D센터 |
| 키워드 |
Steel; TMCP; SAW; Microstructure; Charpy impact properties
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| E-Mail |
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