P对过共晶Al-25%Si合金微观组织和力学性能的影响  

Effect of P on the Microstructure and Mechanical Properties of Hypereutectic Al-25%Si Alloy

作　　者：孙雪 石为喜[1] 李祉澈 王浩宇 张译文 SUN Xue;SHI Weixi;LI Zhiche;WANG Haoyu;ZHANG Yiwen(School of Metallurgy and Materials Engineering,Liaoning Institute of Science and Technology,Benxi Liaoning 117004,China)

机构地区：[1]辽宁科技学院冶金与材料工程学院,辽宁本溪117004

出　　处：《辽宁科技学院学报》2024年第6期15-17,25,共4页Journal of Liaoning Institute of Science and Technology

基　　金：2025年辽宁科技学院大学生创新创业训练计划项目(202511430022);辽宁省教育厅基本科研项目(面上项目)(LJKZ1066)。

摘　　要：文章以过共晶Al-25%Si合金为研究对象,采用Cu-14%P对其进行变质研究。经P变质处理后,Al-25%Si合金中初晶硅形态变化明显,初晶硅由粗大的块状变为细小的颗粒状,平均晶粒尺寸由未变质的150~200μm细化到变质后的30~50μm。共晶硅以长针状分布,分布密度明显降低。XRD测试结果表明,经P变质处理后的Al-25%Si合金样品中还出现了新的衍射峰,经判断为AlP相和CuAl2相的衍射峰。力学性能测试结果表明,经P变质处理后Al-25%Si合金的抗拉强度与硬度均有所提高。Cu-14%P was adopted as a modifier for the hypereutectic Al-25%Si alloy.After P modification treatment,the mor⁃phology of primary silicon in the Al-25%Si alloy changed significantly.Specifically,the primary silicon in the alloy transformed from coarse blocks into fine particles,with the average grain size being refined from 150-200μm(before modification)to 30-50μm(after modification).Eutectic silicon exhibited an elongated needle-shaped distribution,with a significantly decreased density.XRD analysis revealed the emergence of new diffraction peaks in the modified alloy,identified as those belonging to the AlP and CuAl2 phases.The mechanical testing demonstrated an improvement in both tensile strength and hardness of the modified Al-25%Si alloy.

关 键 词：齿轮 齿根裂纹 动力学模型 定子电流分析 

分 类 号：TG146.2[一般工业技术—材料科学与工程] TG113[金属学及工艺—金属材料]