有序排布金刚石锯片的制备与磨粒磨损形态研究

采用一种新型阵列微孔吸附金刚石多层有序排布法制备了体积分数为20%的多层有序排布金刚石锯片, 对比研究了多层有序排布金刚石锯片和随机分布金刚石锯片在加工罗源红花岗岩时的锯切电流和单颗金刚石磨粒所受的切向锯切力, 对切割加工实验后锯片中金刚石磨粒不同磨损形态进行了观察和统计, 分析了金刚石有序排布对锯片切割性能及金刚石磨粒磨损特征的影响。结果表明, 阵列微孔吸附有序排布金刚石锯片的锯切电流和单颗金刚石磨粒所受的切向锯切力比磨粒随机分布锯片低; 在干切和湿切条件下, 有序排布金刚石锯片的脱落磨粒占总磨粒比率比随机分布金刚石锯片低, 宏观破碎和微破碎磨粒占总磨粒比率比随机分布金刚石锯片高。

Preparation and abrasive wear characteristics of orderly arrayed diamond saw blades

The multi-layer orderly arrayed diamond saw blades were prepared by a novel orderly arrayed micro-hole adsorbent method with the grit volume fraction of 20%. Cutting tests of G664 granite were carried out by using the orderly arrayed diamond saw blades and the randomly arrayed saw blades, respectively. The cutting electric current, tangential cutting force of single grit, and wear morphology of diamond grits in the cutting tests were studied and analyzed. The effects of orderly arrayed diamond grits on cutting performance and abrasive wear characteristics were investigated. The results show that, the cutting electric current and single grit tangential cutting force of orderly arrayed diamond saw blades are lower than those of randomly arrayed saw blades. Both in the dry and wet cutting conditions, the abscission particle fraction of diamond grits in total quantity of diamond grits of orderly arraying diamond saw blades is lower than that of randomly arrayed saw blades, and the particle number fraction of diamond grits in micro-fracture and macro-fracture of randomly arrayed saw blades is higher than that of randomly arrayed saw blades.