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A Study on Mechanical Properties Changes to Improve the Confidence of Remaining Life Evaluation for the Weldment of Power Plant Boiler Tube(SA213-T12)

발전설비 보일러 튜브 용접부의 잔여수명평가 신뢰성 향상을 위한 기계적 물성 변화 연구(SA213-T12)

  • Oh, Byungjin (KEPCO-KPS Technology solution center, Ajou University, Industrial Engineering) ;
  • Jang, Joong Soon (Ajou University, Industrial Engineering)
  • 오병진 (한전KPS주식회사 솔루션센터, 아주대학교 산업공학과 대학원) ;
  • 장중순 (아주대학교 대학원 산업공학과)
  • Received : 2014.04.09
  • Accepted : 2014.06.20
  • Published : 2014.06.30

Abstract

Boiler equipment in power plant is always being operated in harsh conditions and severely exposed to the extreme environment of high temperature. Therefore periodically the state of devices should be checked, diagnosed, and analyzed to ensure the reliability of the equipment. Traditionally, such a diagnosis is based one or two physical properties of the sample taken from the equipment like hardness, microstructure, etc.. However, to enhance the confidence of the diagnosis, it is necessary to synthesize those properties together. This paper is to propose such a synthetic procedure for SA213-T12(1Cr-0.5Mo) which was developed to be used in $565^{\circ}C$ below condition. Creep test and accelerated degradation test were performed simultaneously, and the physical properties such as microstructure, tensile strength, yield strength, hardness, and indentation properties were measured. This paper proposes a method of determining the remaining life by quantitative comparison. It will provide the basis of evaluating life assessment more objective and reliable.

Keywords

References

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