열처리공학회지 (Journal of the Korean Society for Heat Treatment)

  • 제34권4호
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  • Pages.179-184
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  • 2021
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  • 1225-1070(pISSN)
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  • 2508-4046(eISSN)
한국열처리공학회 (The Korean Society for Heat Treatment)
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극초고강도 이차경화형 마르텐사이트강의 기계적성질에 미치는 오스포밍 공정의 영향

The Effect of Ausforming Process on Mechanical Properties of Ultrahigh Strength Secondary Hardening Martensitic Steels

  • Kim, S.B. (School of Advanced Materials Engineering, Kookmin University) ;
  • Won, Y.J. (School of Advanced Materials Engineering, Kookmin University) ;
  • Song, Y.B. (Agency for Defense Development) ;
  • Cho, K.S. (School of Advanced Materials Engineering, Kookmin University)
  • 투고 : 2021.07.08
  • 심사 : 2021.07.21
  • 발행 : 2021.07.30
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초록

Two types of secondary hardening martensitic steels, 10Co-14Ni and 6Co-5Ni, were produced by vacuum induction melting to investigate the effect of ausforming process on mechanical properties. According to the results of present study, the alloy samples ausformed at low temperature indicated a rather low hardness level in overall aging time despite the refinement of martensite lath width. As the result can closely be related with the presence of primary carbides precipitated within the initial austenite matrix, we confirmed that, in ultrahigh strength secondary hardening martensitic alloy steels, the ausforming process can rather limit the degree of secondary hardening during the subsequent aging treatment.

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과제정보

본 논문은 정부(산업통산자원부)의 재원으로 산업기술평가관리원의 지원(No.20012296, 산업기술 알키미스트프로젝트)과 정부(국방부)의 재원으로 방위사업청의 지원을 받아 수행된 연구입니다(계약번호 UD170108GD, 국방과학연구소 연구용역 사업).

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