SiCp/Al复合材料制孔崩边缺陷及其评价方法

Evaluation method of hole edge collapse defects in drilling particles reinforced aluminum matrix composites SiCp/Al

对中高体积分数碳化硅颗粒增强铝基(SiCp/Al)复合材料制孔崩边缺陷进行了三维试验观测和统计分析,建立了制孔崩边缺陷模型,提出了一种基于崩边体积的SiCp/Al复合材料崩边缺陷程度评价方法。研究结果表明:崩边缺陷是SiCp/Al复合材料制孔的主要缺陷,且崩边缺陷主要产生在制孔出口处。采用该方法能够对不同参数下的制孔崩边缺陷程度进行客观真实的评价,对优化制孔工艺参数具有一定的指导意义。

The hole edge collapse defects in drilling medium and high volume ratio silicon carbide particle reinforced aluminum matrix composites(SiCp/Al)were observed by 3Dtest and statistically summarized,the defect mathematics model of edge collapse was established and a geometric method based on edge collapse volume has been presented to evaluate edge collapse level.The results show that the main defects in drilling SiCp/Al composites are edge collapse defects which are mainly produced at the exit of hole.The evaluation method is objective and real to evaluate the edge collapse defect level under different parameters in drilling SiCp/Al composites,and it has a certain guiding significance to process parameters optimization.