한국신뢰성학회지:신뢰성응용연구 (Journal of Applied Reliability)

  • 제15권4호
  • /
  • Pages.262-269
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  • 2015
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  • 1738-9895(pISSN)
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  • 2733-8320(eISSN)
한국신뢰성학회 (The Korean Reliability Society)
권호 표지

고온 플랜트용 내열 합금강 가속열화 기구의 현장 사용재 비교 검증

Comparative Verification of Accelerated Degradation Mechanism of Heat-Resistant Steel for High Temperature Plant with that Used in the Field

  • 이승미 (서울과학기술대학교 NID 대학원) ;
  • 김재연 (서울과학기술대학교 신소재공학과) ;
  • 변재원 (서울과학기술대학교 신소재공학과)
  • Lee, Seung-Mi (Department of Graduate School NID Fusion Technology, Seoul national university of science & technology) ;
  • Kim, Jae-Yeon (Department of Materials Science and Engineering, Seoul National University of Science and Technology) ;
  • Byeon, Jai-Won (Department of Materials Science and Engineering, Seoul National University of Science and Technology)
  • 투고 : 2015.09.30
  • 심사 : 2015.10.30
  • 발행 : 2015.12.25
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초록

Accelerated degradation mechanism of the heat-resistant steel for high temperature plant was analysed in terms of microstructure and hardness. In order to simulate the microstructure of the steel actually used at $540^{\circ}C$ in the field, isothermal exposure was carried out at $630^{\circ}C$ up to 4,800 hours. The artificial degradation mechanism was comparatively verified to successfully simulate degradation of the long-time used field material. For the artificially degraded specimens, databases including size and aspect ratio of carbide, chemical composition (i.e., Cr/Mo ratio) of grain boundary carbide were built up. These degradation parameters were suggested as fingerprints for PHM (i.e., prognostics health management) of power plants.

키워드

참고문헌

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