通过聚晶金刚石刀具对SiC晶须增强铝基复合材料SiCw/LD2的超精密切削试验,并用原子力显微镜AFM对加工表面的微观形貌进行检测分析证明:SiCw/Al铝基复合材料的加工表面粗糙度值可以达到超精密级Ra0.01μm,但比切铝基体材料的表面粗糙度值大一级,且粗糙度值随着切削速度的增加、进给量的减小而减小,而吃刀量的影响不大;晶须的破坏方式对加工表面粗糙度也有直接影响。 The ultra-precision cutting tests of SiC whiskers reinforced SiC composites SiCw / LD2 by polycrystalline diamond tools and the microscopic morphology of the machined surfaces by atomic force microscopy (AFM) showed that the surface roughness of SiCw / Al composites Degree of ultra-precision level can reach Ra0.01μm, but than the cut aluminum base material surface roughness value of one level, and the roughness value increases with the cutting speed, reducing the amount of feed decreases, and eat knife The amount of impact is not; whisker damage to the processing of the surface roughness also has a direct impact.