Proceedings of the Korean Society for Technology of Plasticity Conference (한국소성가공학회:학술대회논문집)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Hot Rolling Properties of Non-combustible AZ31-xCa Magnesium Alloys

난연성 AZ31-xCa 마그네슘합금의 열간압연 특성

  • Yim C. D. (Materials Technology Department, KIMM) ;
  • You B. S. (Materials Technology Department, KIMM) ;
  • Lee J. S. (School of Materials Science and Engineering, Hongik University) ;
  • Kim W. C. (School of Materials Science and Engineering, Hongik University)
  • 임창동 (재료연구부, 한국기계연구원 재료기술연구소) ;
  • 유봉선 (재료연구부, 한국기계연구원 재료기술연구소) ;
  • 이진수 (재료공학부, 홍익대학교) ;
  • 김완철 (재료공학부, 홍익대학교)
  • Published : 2004.08.01
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Abstract

In this study, the effects of Ca content and processing variables on hot rolling properties of gravity cast AZ31-xCa alloys were evaluated systematically. The number and length of side crack were decreased with increasing preheating temperature and decreasing reduction ratio per pass and Ca content. The UTS and YS were not strongly dependent on the Ca content but the elongation decreased with increasing Ca content. The decrease of elongation in Ca containing alloys was least when the sheets were fabricated under preheating temperature of $400^{\circ}C$ and reduction ratio per pass of $15\%$. The sheets had the sound external features with little side cracks by homogenization of gravity cast AZ31-xCa alloys before hot rolling. In the cases of AZ31-xCa alloys containing under $1wt.\%$ Ca, the annealed sheets after homogenization and hot rolling had the similar tensile properties to those of AZ31 sheet.

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