소성∙가공 (Transactions of Materials Processing)

  • 제13권4호
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  • Pages.350-358
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  • 2004
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  • 1225-696X(pISSN)
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  • 2287-6359(eISSN)
한국소성∙가공학회 (The Korean Society for Technology of Plasticity and materials processing)
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중탄소강에서 합금원소 및 초석 페라이트가 기계적성질에 미치는 영향

Effects of Alloying Elements and Pro-eutectoid Ferrite on Mechanicl Properties in Medium Carbon Steels

  • 심혜정 (국민대학교 신소재공학과) ;
  • 송형락 (국민대학교 신소재공학) ;
  • 남원종 (국민대학교 신소재공학과)
  • 발행 : 2004.07.01
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초록

The effects of alloying elements on microstructural features and mechanical properties in 0.55%C medium carbon steels were investigated. The samples were austenitized at 105$0^{\circ}C$ for 30min. followed by quenching in a salt bath in the temperature range of 500 ~ $620^{\circ}C$. The addition of Cr resulted in the decrease of the volume fraction of pro-eutectoid ferrite and interlamellar spacing in pearlite and the increase of strength. However, the addition of B caused the increase of the volume fraction of pro-eutectoid ferrite. Reduction of area and Charpy impact values were influenced by the combined effect of microstructural features, such as the volume fraction of pro-eutectoid ferrite, interlamellar spacing and the thickness of lamellar cementite in pearlite.

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참고문헌

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