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唐鹏,刘裔源,黄惠毅,胡治流,赵艳君.稀有元素Er对Al-Si-Fe-Co合金组织与性能的影响[J].稀有金属材料与工程(英文),2020,49(10):3528~3535.[Tang Peng,Liu Yiyuan,Huang Huiyi,Hu Zhiliu and Zhao Yanjun.Effect of rare element Er on microstructure and properties of Al-Si-Fe-Co alloy[J].Rare Metal Materials and Engineering,2020,49(10):3528~3535.]
Effect of rare element Er on microstructure and properties of Al-Si-Fe-Co alloy
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Received:October 24, 2019  Revised:December 15, 2019
DOI:
Key words: Fe-rich Al-Si alloy  Er element  microstructure  refinement and modification  mechanical properties
Foundation item:国家自然科学基金资助(项目号51661004),广西自然科学基金(项目号2017GXNSFAA198271),广西创新驱动项目(项目号AA17202011-1,AA18242003),广西生态型铝产业协同创新中心项目(项目号20190255) ,南宁市科学技术项目(20171102)
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Tang Peng,Liu Yiyuan,Huang Huiyi,Hu Zhiliu and Zhao Yanjun  
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Abstract:
      In this paper, the addition of Er element in the alloy of Al10Si1.5Fe2.25Co was carried out to study the effect of different mass fractions of Er on the refinement and mechanical properties of the microstructure. The research shows that the cerium element can effectively refine the eutectic silicon structure in the high-iron aluminum-silicon alloy after Co metamorphism. When the addition amount of element Er is 0.5wt.%, the eutectic silicon has the best refining effect; At the same time, α-Al also obtained a certain refinement, and excessive Er will lead to the precipitation of acicular Al3Er phase, but the element Er has no obvious refinement effect on the bulk iron-rich phase. With the refinement of eutectic silicon, the plasticity of the alloy is enhanced and the tensile strength is also improved. When the Er content is 0.5%, the maximum tensile strength is 160.8 MPa and the elongation after fracture is 1.89%. The alloy was increased by 5% and 19.6% compared to the alloy without Er added, and the excess of Er resulted in a decrease in strength and ductility. At the same time, with the increase of Er content in the alloy, the wear rate and friction coefficient of the alloy increased. When Er content is 0.5wt%, the relative wear resistance of the alloy reaches the best.