Comparative study on properties of in situ particles reinforced Al-Si-X (Mg, Ti, Ni) composites by centrifugal casting

2022 5th International Conference on Advanced Electronic Materials, Computers and Software Engineering (AEMCSE) Pub Date : 2022-04-01 DOI:10.1109/AEMCSE55572.2022.00027

X. Lin, Linxian Che, Jian Sun, Weibo Li

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Abstract

In this study, Al-Si-X (Mg, Ti, Ni) composite tubular castings were prepared by centrifugal casting. The segregation behavior of primary particles formed in different alloys under the action of centrifugal field was analyzed, and the hardness and wear resistance of different composites were tested. The results show that primary Si/Mg2Si particle reinforcement layer is formed in the inner layer of the casting by Al-Si-Mg composite, the primary TiAlSi particle reinforcement layer is formed in the outer layer of the casting by Al-Si-Ti composites, and the primary NiAb3/Si particle reinforcement layer is formed in the inner and outer layers of the casting for Al-Si-Ni composites, respectively. The hardness of particle reinforced layer in Al-18Si-7Mg (Ti, Ni) alloy castings reaches HRB71.5, HRB67 and HRB67.5, respectively. The volume wear of Al-18Si-7Mg alloy is the least. The difference of hardness and wear resistance of particle reinforcement layer is mainly related to the volume fraction, size and particle morphology of primary particles in the alloy.

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离心铸造原位颗粒增强Al-Si-X (Mg, Ti, Ni)复合材料性能的对比研究

采用离心铸造法制备了Al-Si-X (Mg, Ti, Ni)复合管状铸件。分析了不同合金在离心力作用下形成的初生颗粒的偏析行为，并测试了不同复合材料的硬度和耐磨性。结果表明:Al-Si-Mg复合材料在铸件内层形成初生Si/Mg2Si颗粒增强层，Al-Si-Ti复合材料在铸件外层形成初生TiAlSi颗粒增强层，Al-Si-Ni复合材料在铸件内层和外层分别形成初生NiAb3/Si颗粒增强层。Al-18Si-7Mg (Ti, Ni)合金铸件的颗粒增强层硬度分别达到HRB71.5、HRB67和HRB67.5。Al-18Si-7Mg合金的体积磨损最小。颗粒增强层硬度和耐磨性的差异主要与合金中初生颗粒的体积分数、尺寸和颗粒形貌有关。

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2022 5th International Conference on Advanced Electronic Materials, Computers and Software Engineering (AEMCSE)

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