AZ계 마그네슘 합금의 열간 정수압 압출특성 연구

The Characteristics of Hot Hydrostatic Extrusion of AZ Magnesium Alloy

  • 윤덕재 (한국생산기술연구원) ;
  • 유봉선 (한국기계연구원부설 재료연구소) ;
  • 임성주 (한국생산기술연구원) ;
  • 김응주 (한국생산기술연구원)
  • 발행 : 2008.10.09

초록

Extrusion characteristics of Mg alloys were studied experimentally. The Al-Zn-Mg alloys, AZ31, AZ6l, AZ80, and AZ91 were extruded with hot hydrostatic extrusion process. The hydrostatic process was efficient to reduce surface friction and extend steady state region in extrusion which made it more convenient to examine deformation behavior of the alloys avoiding the disturbance caused by temporary contact state between billet and die, and billet and container. High pressure was cooperative to expand forming limit of the alloys which were applied on the billet during the extrusion process. Extrusion limits were traced in temperature and extrusion speed domain with changing composition of the alloying elements. Effects of process parameters on extrusion load and microstructure evolution were investigated also.

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