한국주조공학회지 (Journal of Korea Foundry Society)

  • 제30권4호
  • /
  • Pages.142-146
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  • 2010
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  • 1598-706X(pISSN)
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  • 2288-8381(eISSN)
한국주조공학회 (Korea Foundry Society)
권호 표지

슈퍼 듀플렉스 스테인리스강의 캐비테이션 마모 특성에 대한 연구

A Study on the Characteristics of Cavitation Erosion of Super Duplex Stainless Steel

  • Jeon, Soon-Hyeok (Department of Materials Science and Engineering, Yonsei University) ;
  • Kim, Soon-Tae (Department of Materials Science and Engineering, Yonsei University) ;
  • Lee, In-Sung (Department of Materials Science and Engineering, Yonsei University) ;
  • Park, Yong-Soo (Department of Materials Science and Engineering, Yonsei University)
  • 투고 : 2010.06.30
  • 심사 : 2010.08.10
  • 발행 : 2010.08.30
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초록

To elucidate the characteristics of cavitation erosion of super duplex stainless steel, a cavitation erosion test, an optical microstructure, a hardness test, and a transmission electron microscope (TEM) analysis were conducted. As aging time at $475^{\circ}C$ increased, the hardness of ferrite phase increased whereas that of austenite phase was nearly constant. The reason why the cavitation erosion resistance increased with an increase of aging time was due to the formation of W-rich phases (${\alpha}$') of a nanometer scale with the high hardness that were precipitated within ${\alpha}$-grains and at ${\alpha}$-grain boundaries during aging, compared with that of the solution annealed alloy.

키워드

참고문헌

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