AlTiB和Ce耦合作用对A356铝合金组织与性能的影响

兰州理工大学学报 ›› 2026, Vol. 52 ›› Issue (1): 1-7.

• 材料科学与工程 • 下一篇

AlTiB和Ce耦合作用对A356铝合金组织与性能的影响

曹驰^*1, 杨依帆^1,2, 韩剑³, 赵葵³, 胡一迪², 王坤²

1.兰州理工大学材料科学与工程学院, 甘肃兰州 730050;
2.浙江工贸职业技术学院, 浙江温州 325026;
3.温州瑞明工业股份有限公司, 浙江温州 325000

收稿日期:2025-04-08 出版日期:2026-02-28 发布日期:2026-03-05
通讯作者: 曹驰(1969-),男,内蒙古赤峰人,博士,高级工程师.Email:caochi@lut.edu.cn
基金资助:
浙江省“ 尖兵领雁+X”科技计划项目(2025C03018),温州市科研项目(ZZG2024002),温州市特种泵阀材料重点实验室资助(2024ZDSYS)

The influence of AlTiB and Ce coupling on the microstructure and properties of A356 aluminum alloy

CAO Chi¹, YANG Yi-fan^1,2, HAN Jian³, ZHAO Kui³, HU Yi-di², WANG Kun²

1. School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050;
2. Zhejiang Vocational and Technical College of Industry and Trade, Wenzhou 325026;
3. Wenzhou Ruiming Industrial Co. Ltd., Wenzhou 325000

Received:2025-04-08 Online:2026-02-28 Published:2026-03-05

摘要/Abstract

摘要： 为了提高A356铝合金晶粒细化和变质细化的耦合效果.添加不同比例的AlTiB和Ce,T6热处理后,采用XRD、OM和TEM及力学性能测试,研究了复合处理对α-Al晶粒与共晶Si相的组织调控规律及力学性能提升机制.结果表明:AlTiB和Ce的耦合作用能够显著细化α-Al晶粒并改善共晶Si的形貌.添加0.9%AlTiB和0.3%Ce,α-Al二次枝晶间距由23.71 μm细化至17.44 μm,共晶Si的平均长度由22.3 μm缩短至7.4 μm,其形态由粗针状转变为圆棒状.原位析出的Ti₂Al₂₀Ce以弥散分布的形态存在基体中,与富Si相界面结合良好,形成高效异质形核位点;合金的抗拉强度、屈服强度、延伸率和布氏硬度分别达到288.5、189 MPa、4.9%和59.5 HB,与原始态铝合金相比分别提高了61.5%、23.8%、53.1%和29.4%.

关键词: A356铝合金, 晶粒细化, 复合处理, 力学性能, 共晶Si改性

Abstract: In order to improve the coupling effect of grain refinement and metamorphic refinement of A356 aluminum alloy. The mechanism of the composite treatment of adding AlTiB and Ce on the organization regulation law of α-Al grains and eutectic Si phase and the enhancement of mechanical properties were systematically investigated by using XRD, OM and TEM and mechanical property tests after heat treatment. The results showed that the coupling mechanism of AlTiB and Ce can significantly refine the α-Al grains and improve the morphology of eutectic Si. With the addition of 0.9% AlTiB and 0.3% Ce, α-Al secondary dendrite spacing refine from 23.71 μm to 17.44 μm, the average length of eutectic Si is shortened from 22.3 μm to 7.4 μm, and its morphology is transformed from a coarse needle-like shape to a rounded rod. The in-situ precipitated Ti₂Al₂₀Ce exists in the matrix in a diffusely distributed morphology, and combines well with the interface of the Si rich phase to form highly efficient heterogeneous nucleation sites; The tensile strength, elongation and Brinell hardness of the alloy in this composition reach288.5 MPa, 189 MPa, 4.9% and 59.5 HB, respectively, which are 61.5%, 23.8%, 53.1% and 29.4%higher compared with the pristine state of the aluminum alloy, respectively.

Key words: A356 aluminum alloy, grain refinement, composite modification, mechanical properties, eutectic Si modification

中图分类号:

TG292

曹驰, 杨依帆, 韩剑, 赵葵, 胡一迪, 王坤. AlTiB和Ce耦合作用对A356铝合金组织与性能的影响[J]. 兰州理工大学学报, 2026, 52(1): 1-7.

CAO Chi, YANG Yi-fan, HAN Jian, ZHAO Kui, HU Yi-di, WANG Kun. The influence of AlTiB and Ce coupling on the microstructure and properties of A356 aluminum alloy[J]. Journal of Lanzhou University of Technology, 2026, 52(1): 1-7.

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AlTiB和Ce耦合作用对A356铝合金组织与性能的影响

The influence of AlTiB and Ce coupling on the microstructure and properties of A356 aluminum alloy

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