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申华,史建超,穆永亮,罗洪杰,姚广春.水冷铜模对添加Mn和Zr的6061铝合金微观组织及力学性能的影响[J].稀有金属材料与工程(英文),2019,48(1):300~308.[Shen Hua,Shi Jianchao,Mu Yongliang,Luo Hongjie and Yao Guangchun.Effects of Water-Cooling Cu Mould on Microstructure and Mechanical Properties of 6061 Aluminum Alloy with Mn and Zr Addition[J].Rare Metal Materials and Engineering,2019,48(1):300~308.]
Effects of Water-Cooling Cu Mould on Microstructure and Mechanical Properties of 6061 Aluminum Alloy with Mn and Zr Addition
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Received:May 24, 2017  Revised:October 13, 2017
DOI:
Key words: 6061 aluminum alloy  water-cooling Cu mould  sub-rapid solidification  microstructure  mechanical propertie
Foundation item:国家自然科学基金资助(No.51301109)
Author NameAffiliation
Shen Hua,Shi Jianchao,Mu Yongliang,Luo Hongjie and Yao Guangchun  
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Abstract:
      Effects of sub-rapid solidification by water-cooling Cu mould on microstructure and mechanical properties of 6061 aluminum alloy with Mn and Zr addition were investigated. Microstructure of the alloys was analyzed by optical microscopy, scanning electron microscopy and EDS energy spectrum. Solubilities of Mg, Si and Mn elements in as-cast and homogenized Al alloys were estimated by X-ray diffraction and Vegard’s Law. Tensile tests were conducted to investigate the mechanical properties of 6061 aluminum alloy. Results showed that both the segregation of Mg, Si and Mn elements and homogenization time were decreased by sub-rapid solidification. The grain size had also been refined significantly by adding Mn and Zr elements. As-cast precipitated phase was transformed into α-Fe phase of granulate from β-Fe of bone and strip by water-cooling Cu mould., and they were maily granular α-Al8(MnFe)2Si和α-Al8(MnFeCr)2Si after homogenization treatment. Tensile properties of Al alloy with Mn and Zr addition casted by water-cooling Cu mould. The UTS, YS and Elongation of homogenized alloy researches to 286Mpa, 27Mpa and 17.84%, respectively.