微细金属粉末对金属结合剂砂轮性能的影响  

Application of fine powder in metal bonded grinding wheels

作　　者：李国伟 韩欣[2] 王冻冻[2] 牛俊凯 

机构地区：[1]超硬材料磨具国家重点实验室,郑州450001 [2]郑州磨料磨具磨削研究所有限公司,郑州450001

出　　处：《金刚石与磨料磨具工程》2017年第4期53-55,61,共4页Diamond & Abrasives Engineering

摘　　要：为研究微细粉末对金属结合剂砂轮性能的影响,将微细粉末和普通粉末按照设计的比例均匀混合,采用热压烧结的方法制成胎体试块,且在混合粉末中添加超硬磨料制成金属结合剂超硬材料砂轮,利用硬度计、抗折试验机、扫描电镜、切割试验机等设备,分别测试金属结合剂胎体硬度、抗折强度、断口形貌以及金属结合剂超硬材料砂轮切割性能。结果表明:微细粉末的添加有利于提高金属结合剂胎体的抗折强度,最高可以提升20%;另一方面,还可增加超硬材料砂轮的耐磨性,相同试验条件下测得半径磨损量降低了25.7%。In order to explore the effect of fine powder on the performance of metal bonded grinding wheel,the fine powder and ordinary powder with different ratios were mixed homogeneously and were made into matrix body-blocks by hot pressure sintering method.Moreover,superabrasive were added to the above mixed powder and were made into metal bonded superabrasives.By employing the sclerometer,the bending test machine,the scanning electron microscopy,the cutting machine and so on,we tested the hardness of metal bond matrix,the bending strength,the fracture morphology and the cutting performance respectively.The results show that fine powder is favorable to raise the bending strength of metal bond matix and the maximum increase is 20%,and that it also increases the wear resistance of superabrasives,with radius abrasion reduced by 25.7% at the same conditions.

关 键 词：微细粉末 金属结合剂 半径磨损量 

分 类 号：TG74[金属学及工艺—刀具与模具]