【摘要】 通过化学镀镍的方法,分别在两种粒径的金刚石表面镀覆一层增重率不同的Ni-P合金层,利用SEM分析了镀层微观形貌;并将其与树脂混合制备成固结磨料研磨垫,分别作为粗研和精研使用,探索了其加工特性。结果表明:镀层增重率可以明显改变金刚石镀层的微观形貌;精研过程的摩擦系数、材料去除速率和工件表面粗糙度均随着镀层增重率增大呈现先增大后减小的趋势,在镀层增重率30%时达到最大值;粗研过程的材料去除速率和工件表面粗糙度随着镀层增重率增大呈现先增大后减小的趋势,在镀层增重率50%时达到最大值;粗研过程对磨粒把持力的要求高于精研过程。更多还原

【Abstract】 Layer with different Ni-P coating mass gain was prepared on two kinds of diamond particles of different size by electro-less plating. The morphology of coating was observed by SEM. Fixed abrasive pads(FAP) were prepared embedded with nickel plated diamond particles and used as coarse lapping and fine lapping respectively. The machining performance of different FAP was explored. The results demonstrate that morphology of diamond particles changes significantly with Ni-P coating mass gain. The coefficient of friction(COF),material removal rate(MRR) and roughness of work-piece increase first then decrease as the coating mass gain increasing and reach maximum when Ni-P coating mass gain is30% during fine lapping process. The MRR and roughness of work-piece increase first then decrease with the increase of coating mass gain and reach maximum when Ni-P coating mass gain is 50% during coarse lapping process. The requirements of coarse lapping process for the ability of resin matrix to hold grains is higher than fine lapping process.更多还原