多孔CBN/Cu-Sn-Zn堆积磨料在钢轨打磨砂轮中的应用  

Application of porous CBN/Cu-Sn-Zn agglomerated abrasive in rail grinding wheel

作　　者：姚煜 刘鹏展 邹文俊[1] 彭进[1] 简亚溜 韩平[1] YAO Yu;LIU Pengzhan;ZOU Wenjun;PENG Jin;JIAN Yaliu;HAN Ping(School of Material Science and Engineering,Henan University of Technology,Zhengzhou 450000,China;State Key Laboratory of Metastable Materials Science and Technology,Yanshan University,Qinhuangdao 066004,Hebei,China)

机构地区：[1]河南工业大学材料科学与工程学院,郑州450000 [2]燕山大学亚稳材料制备技术与科学国家重点实验室,河北秦皇岛066004

出　　处：《金刚石与磨料磨具工程》2022年第1期69-75,共7页Diamond & Abrasives Engineering

摘　　要：为提高钢轨打磨砂轮的磨削效率和使用寿命,制备一种表面多孔但内部紧实的CBN/Cu-Sn-Zn堆积磨料。讨论Cu-Sn-Zn结合剂的性能、孔隙结构对CBN堆积磨料的影响以及堆积磨料对砂轮结构强度的影响,并通过钢轨被动打磨试验,对堆积磨料添加前后砂轮的磨削效果进行评价。试验结果表明:最佳的多孔CBN堆积磨料试样弯曲强度为78.5 MPa,抗冲击强度为5.5 kJ/m^(2),表面孔隙率在30%~40%。磨料的复合使用可以有效地结合CBN高硬度与锆刚玉良好的冲击韧性的特点,添加体积分数为20%的堆积磨料提高钢轨打磨砂轮的打磨效率及打磨质量。To improve the grinding efficiency and service life of rail grinding wheels,a surface porous CBN/Cu-Sn-Zn compact abrasive is prepared.This work discussed the performance of Cu-Sn metal bond used for preparing agglomerated abrasives,the influence of pore structure on CBN agglomerated abrasive and the effect of agglomerated abrasive on the structural strength of grinding wheel.The grinding effect of grinding wheel before and after compound abrasive addition was evaluated by rail grinding experiment.The results show that the best porous CBN agglomerated abrasive sample has a flexural strength of 78.5 MPa,an impact strength of 5.5 kJ/m^(2),and a surface porosity of 30%~40%.The combined use of abrasive can effectively combine the high hardness of CBN with the good impact toughness of zirconium corundum.The grinding efficiency and grinding quality of rail grinding wheels with 20%volume concentration accumulated abrasives are further improved.

关 键 词：多孔CBN堆积磨料 超硬磨具 钢轨打磨 多孔结构 

分 类 号：TG73[金属学及工艺—刀具与模具] TG58