Optimization of Two-stage Soaking Process for Large-size As-Cast 7005 As-Cast 7005 Aluminum Alloy
Author of the article:HE Xiaofeng-;MO Zhuoqiang;JIANG Qiumei;ZHAO Qizhong;HUANG Kuiu
Author's Workplace：Guangxi Alnan Aluminum Fabrication Co.,Ltd.,Nanning 530031,China;Guangxi Key Laboratory of Materials and Processes of Aluminum Alloys,Nanning 530031,China
Key Words：as-cast 7005 aluminum alloy two-stage homogenization treatment process microstructure hardness energy conservation and cost reduction
Abstract：In order to optimize the old two-stage homogeneous heat treatment process,which was time-consuming,energy-consuming and inefficient in industrial production,OM,SEM,image analysis software and Brinell hardness tester were used to study the effect of two-stage homogeneous heat treatment process on microstructure and hardness of large-size as-cast 7005 aluminum alloy round ingot.The results show that the MgZn2 dispersing particle is completely dissolved after the dual-stage homogenization treatment at 450℃×2 h+470℃×32 h,and only the remaining refractory phases of Al MnFe,Al MnFeSi and other Fe-containing compounds remained.The homogenization effect is consistent with that of the old process,and the ecological production of energy saving,quality improvement and efficiency enhancement could be realized in industrialization.
