摘要
针对高体积分数SiCp/Al复合材料精密加工问题,研究了磨削加工高体积分数SiCp/Al复合材料表面形貌的形成机制.使用金刚石砂轮在干式和湿式两种磨削条件下对高体积分数SiCp/Al复合材料进行磨削实验研究,通过表面粗糙度仪对表面粗糙度进行测量,运用扫描电镜对磨削加工的表面形貌进行观测研究.结果表明:该材料磨削表面的主要缺陷为SiC颗粒拔出、破碎、压入和Al基体的涂敷等,SiC颗粒的破碎和脱落是磨削加工该材料表面形成的主要机制.两种磨削条件下工件进给速度对表面粗糙度的影响比磨削深度更显著,湿式磨削无论是在工件已加工表面形貌和微观结构还是表面粗糙度上都好于干式磨削.
To solve the precision machining problem for the SiCp/Al composite with high volume fraction,the formation mechanism of surface morphology of the grinded SiCp/Al composite with high volume fraction was studied.The grinding experiments for the SiCp/Al composite with high volume fraction were carried out with diamond wheel under both dry and wet grinding conditions.The surface roughness was measured with surface roughness tester,and the surface morphologies of the grinded composite were observed with scanning electron microscope（SEM）.The results indicate that the main defects on the grinded surface of the composite are the draw-out,crushing and press-in of SiC particles as well as the coating of Al matrix.In addition,the crushing and falling of SiC particles are the main formation mechanism of grinded surface of the composite.Under both wet and dry grinding conditions,the influence of feeding speed of workpiece on the surface roughness is more significant than that of grinding depth.The wet grinding is superior to the dry grinding in the surface morphology,microstructure and roughness of machined workpiece.
出处
《沈阳工业大学学报》
EI
CAS
北大核心
2012年第6期666-670,709,共6页
Journal of Shenyang University of Technology
基金
国家自然科学基金资助项目(50975184)
