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구광모(K. M. Ku),오경석(K. S. Oh),서정열(J. Y. Seo),이봉상(B. S. Lee),강권호(K. H. Kang),송창빈(C. B. Song) 한국소성가공학회 2010 한국소성가공학회 학술대회 논문집 Vol.2010 No.10
The quality of aluminum extrudate is decided during extrusion process which involves heat generated mainly by plastic deformation energy and friction between billet and die. The extra heat should be eliminated to appropriate level in order to prevent grain growth of an extrudate. In aluminum industry, the die temperature is managed by nitrogen gas which is safe and relatively cheap. In this study, the flow pattern of nitrogen gas in die cooling system and cooling behavior were analyzed by computational fluid dynamic code, ANSYS CFX 12. The fundamental cooling behavior of die was obtained through the analysis and effective cooling channel design was suggested based on the flow patterns according to gas velocity.