Influences of different degassing processes on （不同的脱气过程的影响）.pdfVIP

CHINA FOUNDRY Research Development Vol.10 No.2 March 2013 Influences of different degassing processes on refining effect and properties of 4004 Al alloy 1 1 1 2 2 *Wang Liping , Cao Guojian , Guo Erjun , Wang Guojun , and Lü Xinyu 1. School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150080, China; 2. Northeast Light Alloy Co., Ltd., Harbin 150060, China Abstract: In order to improve the plasticity of 4004 Al alloy and subsequently the productivity of 4004 Al foil, the research studied in detail the influence of the rotary impeller degassing process on the refining effect of 4004 Al alloy, in which the impacts of four major parameters: gas flow, rotational speed, refining time, and stewing time, on degassing rate of 4004 Al alloy was systematically studied by using an orthogonal experiment methodology. Results show that the rotational speed has the greatest impact on the degassing of 4004 Al alloy, followed by gas flow and refining time; stewing time has the least impact. The optimum purification parameters -1 -1 · · obtained by current orthogonal analysis were: rotor speed of 500 r min , inert gas flow of 0.4 mL h , refining time of 15 min, and stewing time of 6 min. Degassing rate using the optimum parameters reaches 68%. In addition, the comparison experiments among C Cl refining, rotary impeller degassing, and combined