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基于消失模铸造技术,以SiC_p增强铝基复合材料为研究对象,研究不同SiC_p浓度、粒度的磨削层断口磨粒的分布情况及基体与SiC_p磨粒的结合情况。结果表明,加入不同浓度与粒度的SiC_p不会影响复合材料基体的显微组织;随着SiC_p含量增大,基体与SiC_p间的结合并没受到影响;在相同颗粒粒度下,SiC_p含量越高,材料实际抗弯强度越小;在相同浓度下,随着SiC_p粒度变大,抗弯强度先增大后减小。结果表明,在含46目SiC_p粒度的复合材料,具有较高的抗弯强度。
Based on the technology of lost foam casting, the SiC_p reinforced aluminum matrix composites were taken as the research object to study the distribution of abrasive grains and the combination of SiC_p abrasive grains with different SiC_p concentration and particle size. The results show that adding SiC_p with different concentration and particle size does not affect the microstructure of the composite matrix. With the increasing of SiC_p content, the bonding between matrix and SiC_p is not affected. Under the same particle size, the higher the SiC_p content, The actual bending strength of the material is smaller; at the same concentration, as the SiC_p particle size becomes larger, the flexural strength first increases and then decreases. The results show that composites with 46 mesh SiC_p have higher flexural strength.