ISSN:1000-8365 CN:61-1134/TG
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Study of Homogenization Treatment on Microstructure of 6061 Aluminum Alloy Rod
Author of the article:TAN Guoyin;ZHANG Jianyu;XU Fushun;LI Heng;SUN Yanhua;YUE Youcheng;CHEN Yue;FENG Shaotang
Author's Workplace: Kunming Metallurgical Institute,Kunming 650031,China;State Key Laboratory of Pressure Hydrometallurgical Technology of Associated Nonferrous Metal Resources,Kunming 650031,China;Yunnan Aluminium Zexin Co.,Ltd.,Qujing 655500,China
Key Words:homogenization treatment; 6061 aluminum alloy; microstructure; precipitated phase particles
Abstract:Using metallographic microscope and SEM studied the microstructure of 6061 aluminum alloy after homogenization treatment.The results show that there are many coarse precipitate particles observed on the grain boundary of as-casted microstructure.After homogenization treatment,the grain size increases remarkably.The existing network non-equilibrium phase and dendritic structure dissolved back into the aluminum matrix substantially,and the amount of coarse precipitate particles on the grain boundary is reduced.SEM analysis shown that the precipitated phase particles in the as-casted alloy were slender needle-like Al(MnFe)Si phase.After homogenization treatment,the needle-like Al(MnFe)Si phase started to be broken and partially dissolved into the matrix,while the residual portion exhibited spheroidization characteristics.The existence of such precipitated phase particles is good to improve the strength and plasticity of the alloy and the subsequent processing ability of the product.