열처리공학회지 (Journal of the Korean Society for Heat Treatment)

  • 제31권3호
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  • Pages.91-96
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  • 2018
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  • 1225-1070(pISSN)
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  • 2508-4046(eISSN)
한국열처리공학회 (The Korean Society for Heat Treatment)
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크리프와 등온열화에 따른 초초임계압 발전설비용 페라이트계 11Cr-3.45W 내열합금강의 미세조직 변화

Microstructural Development of Ferritic 11Cr-3.45W Heat-resistance Steel for Ultra-supercritical Power Plant During Creep and Thermal Aging

  • 김정석 (조선대학교 재료공학과)
  • Kim, Chung-Seok (Department of Materials Science and Engineering, Chosun University)
  • 투고 : 2018.03.06
  • 심사 : 2018.04.02
  • 발행 : 2018.05.30
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초록

Microstructural development of ferritic 11Cr-3.45W heat-resistance steel for ultra-supercritical power plant during creep and thermal aging was investigated using electron microscopy. The test samples were isothermally aged at $700^{\circ}C$ for up to 4000 hours and subjected to creep loading at $700^{\circ}C$ for predetermined periods of lifetime to prepare the damaged materials. In this structural material, a various secondary phases are the primary influence on mechanical properties of ferritic heat-resistance steel. The typical precipitates of $M_{23}C_6$, MX and $M_2X$ secondary phases had been analyzed through qualitative and quantitative manner. Coarsening of precipitates and increase of lath width were observed during creep and thermal aging. This phenomenon was remarkable for creep process compared with isothermal aging process.

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참고문헌

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피인용 문헌

  1. 고내열 페라이트계 스테인레스 주강의 고온인장특성 평가 vol.34, pp.1, 2018, https://doi.org/10.12656/jksht.2021.34.1.10