Abrasive–workpiece-material Compatibility(磨粒、工件及材料的調配)• Affinity (親和力) of an abrasive grain to the workpiece material is important• The less the reactivity of the two materials, the less wear (磨耗) and dulling (鈍化) of the grains occur during grinding• Recommendations when selecting abrasives:1. Aluminum oxide (氧化鋁): Carbon steels (碳鋼), ferrous alloys(鐵合金), and alloy steels(合金鋼).2. Silicon carbide: Nonferrous metals (非鐵金屬), cast irons(鑄鐵)、碳化物、陶瓷、玻璃及大理石3. Cubic boron nitride(立方氮化硼): Steels (>50HRC鋼料) and cast irons (鑄鐵)、高溫合金鋼4. Diamond: Ceramics (陶瓷), cemented carbides (燒結碳化物),hardened steels (硬化鋼)