中文摘要：

本文使用SiC砂轮和金刚石砂轮对颗粒尺寸大、体积分数高的SiCP/Al复合材料进行了平面磨削实验,研究了磨削深度和工件进给速度对磨削力的影响,并利用扫描电镜对已加工表面形貌进行了研究。结果表明：使用SiC砂轮加工时,磨削力随磨削深度的增加而增大;工件进给速度较低时,磨削力随工件进给速度增加而减小,当工件进给速度超过12 m/min后,磨削力随工件进给速度增加而增大。使用金刚石砂轮加工时,磨削力随磨削深度和工件进给速度的增加而逐渐增大。通过对磨削表面微观形貌的观察可以发现：复合材料中的SiC颗粒增强相主要发生脆性断裂,使用金刚石砂轮能获得较好的表面质量。

英文摘要：

In this paper,the surface grinding of SiCp/Al composite with high volume fraction and larger particles was carried out by using SiC grinding wheel and diamond grinding wheel.The influences of grinding parameters including workpiece feed rate and the depth of grinding on grinding forces were investigated and the workpiece surface morphology was examined.For the SiC grinding wheel,the grinding forces increased with the increase of the grinding depth;when the feed rate was low,the grinding forces decreased with the increase of the feed rate;however when the feed rate was more than 12 m/min,the grinding forces increased with the increase of the feed rate.For the diamond wheel,the grinding forces increased with the increase of the grinding depth and the feed rate.Through SEM observation of the morphology of the ground surface,we found that brittle fracture occurred to the SiC particles which constituted the reinforced phase of the composites.Better surface finish can be achieved by using the diamond grinding wheel.