黏结法制备铁基碳化硼磁性磨粒  

Preparation of Iron Based Boron Carbide Magnetic Abrasive by Bonding Method

作　　者：丁叶 陈燕[1] 丁云龙 刘文浩 周大鹏 DING Ye;CHEN Yan;DING Yun-long;LIU Wen-hao;ZHOU Da-peng(School of Mechanical Engineer and Automation,University of Science and Technology Liaoning,Anshan 114051,China)

机构地区：[1]辽宁科技大学机械工程与自动化学院,辽宁鞍山114051

出　　处：《表面技术》2022年第3期151-157,共7页Surface Technology

基　　金：国家自然科学基金(51775258);辽宁省自然科学基金(20170540458);精密与特种加工教育部重点实验室基金(B201703)。

摘　　要：目的 为解决现有铁磁性磨粒中研磨相材料价格昂贵、硬度不够和性价比低等问题,采用碳化硼粉末制备出一种具有成本低和性价比高的新型磁性磨粒。方法采用黏结法制备铁基碳化硼磁性磨粒,探究制备工艺中不同成分配比对其研磨性能的影响。通过扫描电子显微镜观察磁性磨粒表面形貌,并进行面扫能谱分析观察磨粒中研磨相分布情况;采用表面粗糙度测量仪与3D超景深显微镜对研磨前后的工件表面质量进行对比分析;结合钛合金平板试件的研磨试验结果评价磁性磨粒的研磨性能,最终确定黏结法制备铁基碳化硼磁性磨粒的最佳方案。结果压制力为100 kN,物料与黏结剂量比为10︰1,粒径比为4︰1时,磁性磨粒的切削刃较为明显,研磨效果达到最佳。使用此磁性磨粒研磨30 min后,钛合金平板试件的表面粗糙度由原始的Ra 0.88μm降至Ra 0.07μm,有效去除了工件原始表面的缺陷和加工纹理,改善了工件的表面质量。结论在黏结剂中加入无水乙醇可解决黏结剂过于黏稠、不利于与物料混合的问题。采用此黏结法所制备的铁基碳化硼磁性磨粒能够有效地完成对钛合金材料的加工,铁基碳化硼磁性磨粒可以作为性能优良的磨削介质参与研磨,并能够满足磁粒研磨光整加工的要求。The work aims to prepare a new type of magnetic abrasive with low cost and high-cost performance with boron carbide powder to solve the problems of high price,low hardness and low-cost performance of existing abrasive phase materials.Iron based boron carbide magnetic abrasive particles were prepared by bonding method,and the effect of different composition ratio on its grinding performance was investigated.The surface morphology of magnetic abrasive particles was observed by scanning electron microscope.The distribution of grinding phases in abrasive particles was observed by energy spectrum analysis.The surface roughness measurement instrument and 3D ultra depth of field microscope were used to compare and analyze the surface quality of workpiece before and after grinding.Then combined with the grinding test of titanium alloy plate,the grinding performance of magnetic abrasive particles was evaluated,and the best preparation process parameters of magnetic abrasive particles were finally determined.When the pressing force was 100 kN,the mass ratio of mixture to binder was 10︰1,and the particle size ratio was 4︰1,the cutting performance and grinding effect of magnetic abrasive particles were the best.After grinding for 30 min,the surface roughness of titanium alloy plate decreased from Ra 0.88μm to Ra 0.07μm,which effectively removed the defects and processing texture of the original surface of the workpiece and improved the surface quality of the workpiece.Adding anhydrous ethanol into the binder can solve the problem that the binder is too viscous and is not conducive to mixing with materials.The mechanical mixing method can solve the problem of uneven mixing.Adding anhydrous ethanol into the binder can solve the problem that the binder is too viscous and is not conducive to mixing with materials.The iron-based boron carbide magnetic abrasive prepared by this bonding method can successfully complete the processing of titanium alloy materials.The iron-based boron carbide magnetic abrasive can be used as a g

关 键 词：磁性磨粒 磁粒研磨 碳化硼 黏结法 研磨性能 钛合金 

分 类 号：TG580.68[金属学及工艺—金属切削加工及机床]