The Influence of Extrudate Microstructure of Die Cooling Using $N_2$ gas in Hot Extrusion for Al 6061 Alloy

Al 6061의 열간압출시 질소금형냉각이 압출재의 미세조직에 미치는 영향

  • Ko, D.H. ;
  • Yee, S.H. ;
  • Ko, D.C. ;
  • Kim, B.M.
  • 고대훈 (부산대학교 대학원 첨단정밀공학과) ;
  • 이상호 (부산대학교 대학원 정밀기계공학과) ;
  • 고대철 (부산대학교 ILIC) ;
  • 김병민 (부산대학교 기계공학부)
  • Published : 2008.10.09

Abstract

It's so difficult to obtain simultaneously both product quality and improvement of the productivity of which products are in hot aluminum extrusion process. But significant improvements in productivity and extrudate quality result from die cooling system using nitrogen gas injection during aluminum hot extrusion. These benefits are due primarily to cooling effect nitrogen gas and removal of excess heat in the extrudate temperature. This investigation is carried out hot extrusion experiment, also compared cooling system with non-cooling system to inspect cooling effects on hot aluminum extrusion. The purpose of this investigation is estimated the grain growth fur the extrudate quality, and the ram speed for the improvement of the productivity.