대한금속재료학회지 (Korean Journal of Metals and Materials)

  • 제49권3호
  • /
  • Pages.197-202
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  • 2011
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  • 1738-8228(pISSN)
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  • 2288-8241(eISSN)
대한금속재료학회 (The Korean Institute of Metals and Materials)
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25Cr-7Ni-4Mo-0.2N 슈퍼 2상 스테인리스강의 기계적 성질에 미치는 χ상의 영향

Effect of χ Phase Formation on the Mechanical Properties of 25Cr-7Ni-4Mo-0.2N Super Duplex Stainless Steel

  • 강창룡 (부경대학교 금속공학과) ;
  • 김재환 (부경대학교 친환경수송시스템 연구소)
  • Kang, Chang Yong (Dept. of Metallurgical Engineering, Pukyong National University) ;
  • Kim, Jae Hwan (Green Transportation System Institute, Engineering Research Centers, Pukyong National University)
  • 투고 : 2010.09.03
  • 발행 : 2011.03.25
⟨ 이전 논문 다음 논문 ⟩

초록

This study was carried out to investigate the precipitation behavior of ${\chi}$ phase and effect of ${\chi}-phase$ which precipitated at the initial stage of aging on mechanical properties of 25%Cr-7%Ni-4%Mo-0.2%N super duplex stainless steel. ${\chi}-phase$ was precipitated mainly at the interface of ferrite / austenite phases and inside of the ferrite phase at the initial stage of aging, and it was transformed into ${\sigma}-phase$ with an increase of aging time. The ferrite phase was decomposed into new $austenite({\gamma}_2)phase$ and ${\sigma}-phase$ by aging treatment. The hardness and tensile strength of the initial stage of aging when ${\chi}-phase$ was precipitated did not changed considerably, while elongation rapidly decreased. Accordingly, it is considered that ${\chi}-phase$ didn't affect the hardness and strength significantly, but it affected the elongation.

키워드

참고문헌

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