Orthogonal tests of copper-clad aluminum bimetal continuous casting by nitrogen pressure core-illing  

作　　者：Xue Zhiyong Liang He Yu Wanhua Wu Chunjing 

机构地区：[1]School of Energy and Power Engineering, North China Electric Power University [2]Beijing General Research Institute for Nonferrous Metals [3]School of Materials Science and Engineering, University of Science and Technology Beijing

出　　处：《China Foundry》2013年第6期385-390,共6页中国铸造（英文版）

基　　金：financially supported by the Program for New Century Excellent Talents in University(NCET-12-0849);the Fundamental Research Funds for the Central Universities(13ZD12);the National Natural Science Foundation of China(No.51006034)

摘　　要：To provide theoretical basis and practical guidance for preparing composite rods by direct continuous casting, copper-clad aluminum composite rods of external copper layer diameter 12 mm and inner aluminum core diameter 8 mm were manufactured. Orthogonal tests consisted of three factors and three levels were carried out to research the effects of melting copper temperature, continuous casting speed and nitrogen pressure on the performance of composite rods. Results showed that nitrogen pressure is the most important factor in influencing the surface quality; continuous casting speed is the most important factor in influencing copper & aluminum inter diffusion amount. Nitrogen pressure can noticeably improve the surface quality and make the rods easily be drawn out, but the surface quality does not show visible improvement when the nitrogen pressure is above 0.05 MPa. Measured by tests, the compound layer can be divided into three types according to its cladding layer degree: deficient cladding, normal cladding and excess cladding. The diameter of normal copper-clad aluminum composite rods can be successfully drawn less than 0.6 mm without annealing.To provide theoretical basis and practical guidance for preparing composite rods by direct continuous casting, copper-clad aluminum composite rods of external copper layer diameter 12 mm and inner aluminum core diameter 8 mm were manufactured. Orthogonal tests consisted of three factors and three levels were carried out to research the effects of melting copper temperature, continuous casting speed and nitrogen pressure on the performance of composite rods. Results showed that nitrogen pressure is the most important factor in influencing the surface quality; continuous casting speed is the most important factor in influencing copper ＆ aluminum inter diffusion amount. Nitrogen pressure can noticeably improve the surface quality and make the rods easily be drawn out, but the surface quality does not show visible improvement when the nitrogen pressure is above 0.05 MPa. Measured by tests, the compound layer can be divided into three types according to its cladding layer degree： deficient cladding, normal cladding and excess cladding. The diameter of normal copper-clad aluminum composite rods can be successfully drawn less than 0.6 mm without annealing.

关 键 词：copper-clad aluminum nitrogen pressing continuous casting orthogonal test 

分 类 号：TG249.7[金属学及工艺—铸造]