초초임계압 보일러 헤더용 P92 강 용접부의 고온 크리프 특성 평가
Assessment of High Temperature Creep Characteristics for P92 Steel Weldment in USC Boiler Header
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초록
P92 steel weldment scheduled to use for next generation ultra super critical(USC) boiler header is assessed on creep characteristics. The test method to assess local structure of weldment is small-punch creep(SP-Creep) test, which is a kind of micro test proved the availability on evaluation of mechanical property for local structure. The results for P92 steel weldment are compared with that of tensile creep test for same microstructures of steel weldment. Overall, the creep resistance of coarse grain HAZ(CGHAZ) at 650℃ is inferior to the other structures while fine grain HAZ(FGHAZ) is most superior in the P92 steel weldment. The power law relationships can be obtained for each weldment structures(BM, ICHAZ, FGHAZ, CGHAZ and W.M) of USC boiler header.
Abstract
P92 steel weldment scheduled to use for next generation ultra super critical(USC) boiler header is assessed on creep characteristics. The test method to assess local structure of weldment is small-punch creep(SP-Creep) test, which is a kind of micro test proved the availability on evaluation of mechanical property for local structure. The results for P92 steel weldment are compared with that of tensile creep test for same microstructures of steel weldment. Overall, the creep resistance of coarse grain HAZ(CGHAZ) at 650℃ is inferior to the other structures while fine grain HAZ(FGHAZ) is most superior in the P92 steel weldment. The power law relationships can be obtained for each weldment structures(BM, ICHAZ, FGHAZ, CGHAZ and W.M) of USC boiler header.
참고문헌 (8)
- EPRI, "Manual for Investigation and Correction of Boiler Tube Failures", 1~110 (1985)
- Viswanathan R., "Damage mechanisms and life assessment of high temperature components", pp.206~208 (1993), ASM International Metals Park
- Parker J. D., "Creep Behaviour of Low Alloy Steel Weldments", Int. J. Pres. Ves. & Piping, 63, pp.55~62 (1995)
- Tu S. T., "Strength Design and Life Assessment of Welded Structures Subjected to High Temperature Creep", Int. J. Pres. & Piping, 66, pp.171~186 (1996)
- Sklenicka V., "Long-term Creep Behavior of 9-12%Cr Power Plant Steels", Materials Characterization, 51, pp.35~48 (2003)
- 임주헌, "GMAW를 이용한 V형 맞대기용접에서 용접부 개선각 변화에 따른 용접 특성 연구", 한국기계기술학회지, 15(4), pp.505~509 (2013), 한국기계기술학회
- 임주헌, "GMAW를 이용한 V형 맞대기용접에서 와이어전극돌출길이 변화에 따른 용접 특성 연구", 한국기계기술학회지, 15(4), pp.533~538 (2013), 한국기계기술학회
- Small Punch-Creep Tester and Evaluation Method of Creep Characteristics for High Temperature Structural Components, "H. S. Yu", Korea Patent Registration, ~, pp.Korea Patent Registration No. 0374697 (2003)