Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Microstructure and Machinability with Alloying Elements in the 304 Stainless Steel

304 스테인레스강에서 첨가원소에 따른 미세조직 및 절삭성 연구

  • Kang, S.S. (Department of Materials Science and Engineering, Changwon National University) ;
  • Kim, H.C. (Department of Materials Science and Engineering, Changwon National University) ;
  • Lee, J.H. (Department of Materials Science and Engineering, Changwon National University) ;
  • Cho, J.R. (Department of Mechanical Engineering, Changwon National University) ;
  • Jung, Y.G. (Department of Mechanical Engineering, Changwon National University) ;
  • Jang, C.H. (R&D Center, Changwon Specialty Steel Co.) ;
  • Hwang, H.S. (R&D Center, Changwon Specialty Steel Co.)
  • 강석순 (창원대학교 재료공학과) ;
  • 김현철 (창원대학교 재료공학과) ;
  • 이재현 (창원대학교 재료공학과) ;
  • 조종래 (창원대학교 기계공학과) ;
  • 정윤교 (창원대학교 기계공학과) ;
  • 장철호 (창원특수강(주) 기술연구소) ;
  • 황호순 (창원특수강(주) 기술연구소)
  • Published : 2006.09.27
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Abstract

To enhance the machinability of the austenite stainless alloys, Mn and S were added to form MnS in the austenite matrix. Recently, Ca is also added to increase machinability. The alloying elements, such as C, Mn, S, Ca, and Al, are known to affect machinability, but those roles are not well understood. In this study, the ingots, controlled of alloying elements, C, Mn, S, Ca, Al, were prepared in the 304 stainless steel. The relationship between microstructure and machinability was compared to understand the role of alloying elements. It was proved that Mn and S enhanced machinability but C reduced it by analyzing cutting force on machining in the lathe. The alloying elements, Ca and Al, made a complex oxide compound of Mn-S-Ca-Al-Si-O, which results in increasing tool life. The ferrite volume fraction was changed with alloying elements and the effect of the ferrite fraction on machining was also discussed.

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References

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