Effect of Sn and Bi Microalloying on Microstructure,Mechanical Properties and Cutting Performance of 6026 Aluminum Alloy
Author of the article:NIU Yanping;SHI Changliang;TANG Weixue;ZHANG Dapeng;QIN Jianbo
Author's Workplace：Guangdong Center of Industrial Analysis and Testing,Guangzhou 510650,China;Guangdong Lingsheng New Materials Technology Co.,Ltd.,Foshan 528031,China
Key Words：6026 aluminum alloy cutting performance extrusion lead-free
Abstract：The lead and cutting free 6026 aluminum alloy were prepared by Sn and Bi instead of Pb.The effect of Sn and Bi microalloying on microstructure,mechanical properties and cutting performance of 6026 aluminum alloy were studied by means of optical microscope(OM),scanning electron microscope(SEM),tensile testing machine and high-speed lathe.The results show that the microstructure of 6026 aluminum alloy with Bi element is composed ofα-Al,Mg2Si,CuAl2 and Bi phases.The microstructure of 6026 aluminum alloy with Sn and Bi elements is composed ofα-Al,Mg2Si,CuAl2 and SnBi eutectic.The composite addition Sn and Bi elements makes 6026 aluminum alloy have better cutting performance,smaller chip size,tensile strength,yield strength and elongation are 358.3 MPa,295.7 MPa and 13.9%,respectively.
