Journal of the Korean Society for Heat Treatment (열처리공학회지)

The Korean Society for Heat Treatment (한국열처리공학회)
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The Effect of Heat Treatment on Mechanical Properites of TRIP-Aided Dual Phase Steel

TRIP형 복합조직강판의 기계적특성에 미치는 열처리 방법

  • Lee, S.H. (Dept. of Metall. Eng., Sung kyun kwan Univ.) ;
  • Lee, Y.S. (Dept. of Metall. Eng., Sung kyun kwan Univ.) ;
  • Kim, Y.S. (Dept. of Metall. Eng., Sung kyun kwan Univ.) ;
  • Park, H.S. (Dept. of Metall. Eng., Sung kyun kwan Univ.)
  • 이상훈 (성균관대학교 공과대학 금속공학과) ;
  • 이영섭 (성균관대학교 공과대학 금속공학과) ;
  • 김용성 (성균관대학교 공과대학 금속공학과) ;
  • 박현순 (성균관대학교 공과대학 금속공학과)
  • Published : 1997.06.30
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Abstract

The formation processes of the retained austenite(${\gamma}_R$) in SHCP100 steel sheets were investigated in order to improve the transformation induced plasticity(TRIP) effect of ${\gamma}_R$. An excellent combination of elongation about 23% and high strength over 830 MPa was achieved by processing of intercritical annealing and isothermal holding. The mechanical properties of TRIP-aided dual phase steel was found to depend on the volume ratio of each phase and the volume fraction of ${\gamma}_R$. It was also noted that the proper mechanical stability of ${\gamma}_R$ improved the mechanical properties. In this work, the best balance of strength-ductility was obtained by holding the steel at $420^{\circ}C$ for 500sec. after annealing at $730^{\circ}C$ for 300 sec.

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Acknowledgement

Supported by : 포항종합제철주식회사