刚玉磨料显微试样的磨削工艺研究

采用超细树脂金刚石砂轮直接磨削及手工研磨2种方式，对锆刚玉(ZA)、微晶刚玉(SG)、棕刚玉(A)和黑刚玉(BA)4种刚玉类磨料试样制样，通过对其表面粗糙度、显微硬度及表面形貌的对比分析，研究了2种制样方式的质量和效率，并优化了4种刚玉类磨料试样直接磨削制样的工艺参数。结果表明:直接磨削的刚玉类磨料试样表面粗糙度R_a、R_z及显微硬度与手工研磨制样的基本一致，但前者的制样效率比后者高至少2倍；ZA、SG和A磨料直接选用粗磨、精磨工序即可满足显微硬度测试要求，而BA磨料则在粗磨、精磨工序基础上，再增加光磨2次工序，也可达到显微硬度测试要求。 

Study on grinding process of corundum abrasive microscopic samples

The sample preparation methods of four corundum abrasives, namely zircon corundum (ZA), microcrystalline corundum (SG), brown corundum (A) and black corundum (BA), were studied. The samples were prepared by direct grinding with ultra-fine resin diamond wheel and manual polishing. The surface roughness, microhardness and surface morphology were compared and analyzed. The quality and efficiency of two kinds of sample preparation methods were studied, and the process parameters of direct grinding of four kinds of corundum abrasive samples were optimized. The results show that the surface roughness R_a,R_z and microhardness of corundum abrasives by direct grinding are basically the same as those by manual grinding, while the efficiency of the former is at least double times higher than that of the latter; ZA, SG and A can meet the microhardness test requirements by directly selecting the coarse grinding and fine grinding processes, while BA abrasives require two additional spark-our grinding processes to meet the microhardness test requirements on the basis of coarse grinding and fine grinding processes.