한국주조공학회지 (Journal of Korea Foundry Society)

  • 제29권1호
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  • Pages.27-32
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  • 2009
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  • 1598-706X(pISSN)
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  • 2288-8381(eISSN)
한국주조공학회 (Korea Foundry Society)
권호 표지

Al-7Si-0.4Mg-1Fe 주조합금의 미세조직과 인장성질에 미치는 Mn, Cr 및 Sr 첨가의 영향

Effects of Mn, Cr, and Sr Additions on the Microstructure and Tensile Properties of Al-7Si-0.4Mg-1Fe Casting Alloy

  • 김정민 (한밭대학교 신소재공학부) ;
  • 박준식 (한밭대학교 신소재공학부) ;
  • 김하영 (한밭대학교 신소재공학부) ;
  • 조재익 (한국생산기술연구원 광주연구센터) ;
  • 정창열 (한국생산기술연구원 광주연구센터)
  • Kim, Jeong-Min (Division of Advanced Materials Engineering, Hanbat National University) ;
  • Park, Joon-Sik (Division of Advanced Materials Engineering, Hanbat National University) ;
  • Kim, Ha-Young (Division of Advanced Materials Engineering, Hanbat National University) ;
  • Cho, Jae-Ik (Kwangju R&D Center, Korea Institute of Industrial Technology) ;
  • Jung, Chang-Yeol (Kwangju R&D Center, Korea Institute of Industrial Technology)
  • 발행 : 2009.02.20
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초록

The microstructure of Al-7Si-0.4Mg-1Fe alloy mainly consists of aluminum dendrites, Al-Si eutectics, and $Al_5FeSi$ needles. When Mn was added to the alloy, the substantial amount of $Al_5FeSi$ phase was changed into Al(Mn,Fe)Si, however the needle-like morphology was almost unchanged. Combined additions of Cr or Sr with Mn to the base alloy resulted in rod-like Al(Mn, Fe,Si)Si phase. The tensile properties of as-cast alloys were enhanced by the Mn addition, especially when it was added with Sr. The tensile properties after T6 heat treatment was a little improved with 0.7%Mn addition, but Cr or Sr additions with Mn didn't show any positive effect on the properties of heat-treated alloys.

키워드

참고문헌

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