机电工程技术2025，Vol.54Issue(9)：7-11,5.DOI:10.3969/j.issn.1009-9492.2025.09.002
微合金化对免热处理铸造铝合金组织和性能的影响
Influence of Microalloying on the Microstructure and Properties of Non-heat-treated Cast Aluminum Alloy
摘要
Abstract
Effects of Si,Mn,and Mg alloying elements on the microstructure and mechanical properties of as-cast aluminum alloys without heat treatment are investigated.Utilizing metallographic microscopy,scanning electron microscopy(SEM),X-ray diffraction(XRD),and the WDW-300 universal testing machine,along with an L9(33)orthogonal experiment,the changes in microstructure and mechanical properties of Sr and TCB modified and refined Al-x Si-y Mn-z Mg-0.12Fe-0.1Cr-0.1Cu(x=7.5,8,8.5;y=0.35,0.4,0.45;z=0.15,0.18,0.2;weight percentage)alloys are studied,and the composition of the experimental alloys is optimized.The study reveals that Mn has the most significant impact on the comprehensive mechanical properties of the experimental alloys,followed by Mg and Si.The optimal comprehensive mechanical properties are achieved with the element contents Mn0.35-Si8-Mg0.18.In the optimized alloy,the size of the Fe-rich phases is smaller and more uniformly distributed,and the modification effect of eutectic silicon is more pronounced.These changes contribute to the improvement of the comprehensive mechanical properties of the experimental alloy.After optimization,the tensile strength,elongation,and hardness of the alloy are increased by 3.9%,62.2%,and 0.63%,respectively,achieving an optimization of the alloy's comprehensive mechanical properties.关键词
微合金化/正交试验/免热处理/铝硅合金Key words
microalloying/orthogonal experiment/non-heat-treated/aluminum-silicon alloy分类
机械制造引用本文复制引用
赵少坤,魏作山,谭乐平,柳青,丁海民..微合金化对免热处理铸造铝合金组织和性能的影响[J].机电工程技术,2025,54(9):7-11,5.基金项目
教育部"产学合作协同育人"项目(BINTECH-KJZX-20220831-40) （BINTECH-KJZX-20220831-40）
中央高校基本科研业务费面上项目(2023MS132) （2023MS132）
