Corrosion Science and Technology

  • 제14권2호
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  • Pages.76-84
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  • 2015
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  • 1598-6462(pISSN)
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  • 2288-6524(eISSN)
한국부식방식학회 (The Corrosion Science Society of Korea)
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Vanadium-Boride코팅의 고온 내입자침식성 평가

Evaluation of High Temperature Particle Erosion Resistance of Vanadium-Boride Coating

  • 이의열 (안동대학교 신소재공학부 금속재료공학과) ;
  • 김종하 (안동대학교 신소재공학부 금속재료공학과) ;
  • 정세일 (안동대학교 신소재공학부 금속재료공학과) ;
  • 이선호 (두산중공업 기술연구소) ;
  • 엄기원 (두산중공업 기술연구소)
  • Lee, E.Y. (Department of Materials Science and Engineering, Andong National University) ;
  • Kim, J.H. (Department of Materials Science and Engineering, Andong National University) ;
  • Jeong, S.I. (Department of Materials Science and Engineering, Andong National University) ;
  • Lee, S.H. (Corporate R&D Institute Doosan Heavy Industries & Construction Co.) ;
  • Eum, G.W. (Corporate R&D Institute Doosan Heavy Industries & Construction Co.)
  • 투고 : 2015.02.03
  • 심사 : 2015.04.29
  • 발행 : 2015.04.30
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초록

The components in ultra super critical (USC) steam turbine, which is under development for high efficient power generation, are encountering harsher solid particle erosion by iron oxide scales than ones in the existing steam turbines. Therefore, the currently used boride coating will not be able to hold effective protection from particle erosion in USC system and should be replaced by new particle erosion resistant coatings. One of the best protective coatings developed for USC steam turbine parts was found to be vanadium-boride (V-boride) coating which has a hardness of about 3000 HV, much higher than that of boride, 1600~2000 HV. In order to evaluate particle erosion resistance of the various coatings such as V-boride, boride and Cr-carbide coatings at high temperature, particle erosion test equipments were designed and manufactured. In addition, erosion particle velocity was simulated using FLUENT software based on semi-implicity method for pressure linked equations revised (SIMPLER). Based on experimental results of this work, the vanadium-boride coating was found to be superior to others and to be a candidate coating to replace the boride coating.

키워드

참고문헌

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