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立方氮化硼是继人造金刚石之后的又一种新型超硬磨料。它具有一系列优异的物理、化学性能,具体表现在以下几个方面: 1.硬度仅次于金刚石,达莫氏硬度9.8; 2.具有良好的热稳定性,达1300～1500℃; 3.具有高的化学惰性,在加工高速钢、工具钢、模具钢、轴承钢、不锈钢、镍钴基合金等硬韧性钢材及冷硬铸铁时具有特别好的磨削效果——磨削声音轻快、工效高、工件表面无烧伤、光洁度和加工质量也高。 4.耐磨性好,立方氮化硼磨料的耐磨度约为普通刚玉磨料耐磨度的1400左右。但在干磨条件下,立方氮化硼砂轮与普通刚玉砂轮相比,其耐用度仅相对高100倍左右。这是因为:CBN砂轮的粘结剂由于磨屑的作用而破坏,以
Cubic boron nitride is a new type of super-hard abrasive after the synthetic diamond. It has a series of excellent physical and chemical properties, in particular in the following areas: 1. Hardness second only to diamond, hardness of 9.8; 2. Has good thermal stability, up to 1300 ~ 1500 ℃; Highly inert chemical for grinding high-speed steel, tool steel, tool steel, bearing steel, stainless steel, nickel-cobalt based alloy and other tough ductile steel and chilled cast iron with particularly good grinding effect - grinding sound and light, ergonomic High, the surface of the workpiece without burn, finish and processing quality is high. 4. Good wear resistance, cubic boron nitride abrasive abrasion resistance of about ordinary corundum abrasive 1400 or so. However, dry grinding conditions, cubic boron nitride grinding wheel compared with the ordinary corundum, its durability is relatively high only about 100 times. This is because: CBN wheel binder damage due to the role of wear debris to