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A study on the Fabrication of Copper-clad Aluminum Composite using Hydrostatic Extrusion  

한운용 (경희대학교 대학원 기계공학과)
이경엽 (경희대학교 테크노공학대)
박훈재 (한국생산기술연구원(KITECH)
윤덕계 (한국생산기술연구원(KITECH)
김승수 (한국생산기술연구원(KITECH))
Publication Information
Journal of the Korean Society for Precision Engineering / v.21, no.7, 2004 , pp. 179-184 More about this Journal
Abstract
In this work, a copper-clad aluminum composite was fabricated using hot hydrostatic extrusion with various extrusion ratios (8.5, 19, 49) and semi-die angles (30, 45, 60 degree) at a temperature of 32$0^{\circ}C$, Material characteristics of copper-clad aluminum composites were determined from compression tests and hardness tests The results showed that for ER of 8.5, the optimum semi-die angle was below or equal to 30 degree and a pressure drop was about 31%. For ER of 19, the optimum semi-die angle was in the range of 40 to 50 degree and a pressure drop was about 38%. In the case of ER=49, the optimum semi-die angle was above or equal to 60 degree and a pressure drop was about 36%. Compressive yield strength was maximum for ER of 8.5 and semi-die angle of 30 degree and the value of maximum was 155 MPa. Uniform hardness distribution was obtained as the extrusion ratio increases and the semi-die angle decreases. In the case of ER=8.5 and semi-die angle of 30 degree, the lowest extrusion pressure and the maximum compressive yield strength was obtained. Therefor, it was concluded that the optimum extrusion condition for fabricated copper-clad aluminum composites under hydrostatic pressure environment was ER of 19 and semi-die angle of 30 degree.
Keywords
Copper-cald Aluminum composites(Copper-clad Aluminum); Hydrostatic extrusion; Extrusion pressure; Extrusion ratio(ER); Semi-die angle;
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