金属/金刚石复合磨料在树脂磨具中的应用  

Application of metal/diamond composite abrasive in resin abrasive tools

作　　者：刘恒源 徐三魁[1] 韩志静 韩平[1] 邹文俊[1] LIU Hengyuan;XU Sankui;HAN Zhijing;HAN Ping;ZOU Wenjun(School of Material Science & Engineering, Henan University of Technology, Zhengzhou 450001, China)

机构地区：[1]河南工业大学材料科学与工程学院,郑州450001

出　　处：《金刚石与磨料磨具工程》2021年第2期59-63,共5页Diamond & Abrasives Engineering

摘　　要：为改善砂轮磨削钢轨的性能,通过热压烧结再固化的方法制备超硬复合磨料树脂磨具试验样条,考察不同种类的复合磨料对样条抗弯强度、抗冲击强度及磨具磨耗比的影响,并用电镜观察磨削后磨具及钢轨对磨件的形貌,表征磨削表面质量。结果显示:超硬磨料与金属结合剂造粒后,抗弯强度、抗冲击强度、磨耗比均得到明显提高,最大分别提高50%、近2倍和约12.6倍。超硬材料以复合磨料的形式添加可提高磨具对磨料的把持力,减少钢轨发蓝、烧伤等现象,提高轨面质量。To modify the grinding effect of rails,superhard composite abrasive grains were used to make resin bond test specimens through processes of press-sintering and then curing.The effects of the grain type on the bending strength,the impact strength and the abrasive wear ratio of the specimens were studied and the ground surfaces of the abrasives and rails were observed by using SEM to characterize the quality of ground surface.Results show that after the grain and metal bond are granulated,all three types of mentioned performance of the specimens are significantly improved,i.e.bending strength 50%higher,impact strength nearly 2 times larger and wear ratio about 12.6 times larger.In conclusion,superabrasive,when added as composite grains,could enhance the bonding force of the tool on its grains and reduce the phenomenons such as bluing and burning,thus achieving a better surface quality of the rail.

关 键 词：超硬复合磨料 机械性能 磨耗比 

分 类 号：TG58[金属学及工艺—金属切削加工及机床]