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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2013.12
- 수록면
- 8 - 16 (9page)
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이 논문의 연구 히스토리 (4)
2015
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As the energy consumption increases rapidly, power generation needs the high energy efficiency continuously. To achieve the high efficiency of power generation, the materials used have to endure the higher temperature and pressure. The 9-12%Cr steels possess good mechanical properties, corrosion resistance, and creep strength in high temperature due to high Cr contents. Therefore, the 9-12%Cr steels are widely used for the high-temperature components in power plants. Even though the steels usually have a fully martensitic microstructure, they are susceptible to the formation of δ-ferrite specifically during the welding process. The formation of δ-ferrite has several detrimental effects on creep, ductility and toughness. Therefore, it is necessary to avoid its formation. As the volume fraction of δ-ferrite is less than 2% in microstructure, it has the isolated island morphology and causes no significant degradation on mechanical properties. For δ-ferrite above 2%, it has a polygonal shape affecting the detrimental influence on the mechanical properties. The formation of δ-ferrite is affected by two factors: a chemical composition and a welding heat input. The most effective ways to get a fully martensite microstructure are to reduce the chromium equivalent less than 13.5, to keep the difference between the chromium and nickel equivalent less than 8, and to reduce the welding heat input.
목차
Abstract
1. 서론
2. 9-12%Cr강의 δ-ferrite 및 탄화물 생성
3. 9-12%Cr강에 미치는 δ-ferrite의 영향
4. 결론
Reference
참고문헌 (31)
참고문헌 신청
F. Abe / 1998 / Alloy design of advanced ferritic steels for 659 C USC Boilers / Conference proceeding advanced heat resistant steel for power generation :84~87
T. Masse / 2013 / Creep mechanical behavior of modified 9Cr1Mo steel weldments: Experimental analysis and modeling / Nuclear Engineering and Design 254:97~110
Y.H Lee / 1992 / Study on Softening Characteristics of 9Cr-1Mo Steel Weldments for High Temperature and Pressure Vessels Application / Journal of KWS 10(3):40~53
M. Sireesha / 2001 / Microstructure and mechanical properties of weld fusion zones in modified 9Cr-1Mo steel / Journal of Materials Engineering Performance 10:320~330
B. Arivazhagan / 2011 / A study on influence of heat input variation on microstructure of reduced activation ferritic martensitic steel weld metal produced by GTAW process / Fusion Engineering and Design 86:192~197
T. Masse / 2013 / Creep mechanical behavior of modified 9Cr1Mo steel weldments: Experimental analysis and modeling / Nuclear Engineering and Design 254:97~110
Y.H Lee / 1992 / Study on Softening Characteristics of 9Cr-1Mo Steel Weldments for High Temperature and Pressure Vessels Application / Journal of KWS 10(3):40~53
M. Sireesha / 2001 / Microstructure and mechanical properties of weld fusion zones in modified 9Cr-1Mo steel / Journal of Materials Engineering Performance 10:320~330
B. Arivazhagan / 2011 / A study on influence of heat input variation on microstructure of reduced activation ferritic martensitic steel weld metal produced by GTAW process / Fusion Engineering and Design 86:192~197
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