采用不同的半固态搅拌工艺(变化搅拌速度和搅拌时间),制备了SiC颗粒增强A356复合材料.利用金相显微镜(OM)、扫描电镜(SEM)和磨损试验机研究了搅拌工艺参数对复合材料中SiC颗粒的分布、孔隙率以及磨损量的影响.结果表明,在搅拌速度550 r/min、搅拌时间30 min下,制备的SiCp/A356复合材料SiC颗粒分布均匀,孔隙率相对较低,耐磨性好.
SiC particle reinforced A356 composite material was prepared by semi-solid stirring at different speeds for different times.The effects of stirring parameters on the distribution of SiC particles,porosity and wear loss in the composite were investigated using metallographic microscope (OM),scanning electron microscopy (SEM) and wear testing machine.The results showed that the SiCp/A356 composite which was prepared at the mixing speed of 550 r/min and mixing time of 30 min possessed a uniform distribution of SiC particles,relatively low porosity and good wear resistance.
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