In this investigation, the effect of pouring temperature and the surface angle of vortex casting on microstructural evolution and mechanical properties of 7050Al-3 wt%SiC composite was studied. Two pouring temperatures of 700 °C and 800 °C were employed during the vortex casting. As well, two surface angles of 45° and 90° were used for the vortex casting. Cast microstructures were analyzed by Scanning Electron Microscope (SEM), Transmission Electron Microscope (TEM), and optical microscope. Mechanical properties were measured by uniaxial tensile test, Vickers hardness and Charpy impact test. Microstructural studies showed a uniform distribution of SiC particles in the 7050 Al matrix is achievable by increasing the pouring temperature from 700 °C to 800 °C and also by decreasing the surface angle from 90° to 45°. This uniform distribution of particles was coincided with the breaking of the dendrite arms in the microstructure of 7050 Al-3 wt% SiC. Mechanical properties measurements showed that the yield strength, hardness and fracture energy of the composite were increased by increasing the pouring temperature and reducing the surface angle during the vortex casting.

在这项研究中，研究了浇注温度和涡流铸件的表面角度对7050Al-3 wt％SiC复合材料的组织演变和力学性能的影响。在涡流铸造过程中采用两个倾倒温度分别为700°C和800°C。同样，将两个45°和90°的表面角用于涡旋铸造。通过扫描电子显微镜（SEM），透射电子显微镜（TEM）和光学显微镜分析铸件的组织。通过单轴拉伸试验，维氏硬度和夏比冲击试验测量机械性能。显微组织研究表明，通过将浇铸温度从700°C升高到800°C并将表面角度从90°降低到45°，可以在7050 Al基体中实现SiC颗粒的均匀分布。颗粒的这种均匀分布与7050 Al-3 wt％SiC的微观结构中枝晶臂的断裂相吻合。力学性能测量表明，在涡流铸造过程中，通过提高浇铸温度和减小表面角度，可以提高复合材料的屈服强度，硬度和断裂能。