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研究复合铸造工艺参数对A356-SiCp复合材料显微组织和拉伸性能的影响。在590、600和610°C的温度条件下,分别以200、400和600 r/min的速度对样品进行半固态搅拌,搅拌时间分别为10、20和30 min。分析SiC颗粒在基体材料中的分布、样品的孔隙率和拉伸性能。结果表明,通过延长搅拌时间和降低搅拌温度,可以提升颗粒分布的均匀性;然而,随着搅拌速度的提高,颗粒分布的均匀性呈先上升后下降的趋势。同时还发现,通过增大所有的工艺参数,孔隙率得到了提高。从抗拉特性来看,最佳的搅拌速度、温度和时间分别为400 r/min、590°C和30 min。与孔隙率相比,增强相分布的均匀性对拉伸性能的影响更明显。
The effect of compound casting parameters on the microstructure and tensile properties of A356-SiCp composites was studied. The samples were subjected to semi-solid stirring at temperatures of 590, 600 and 610 ° C for 200, 400 and 600 r / min, respectively, for 10, 20 and 30 min. The distribution of SiC particles in the matrix, the porosity and tensile properties of the samples were analyzed. The results show that the uniformity of particle distribution can be improved by increasing the stirring time and decreasing the stirring temperature. However, with the increase of stirring speed, the uniformity of particle distribution firstly increases and then decreases. It has also been found that porosity is increased by increasing all process parameters. From the tensile properties, the best stirring speed, temperature and time were 400 r / min, 590 ° C and 30 min. Compared with the porosity, the uniformity of the enhanced phase distribution has a more pronounced effect on the tensile properties.