研磨压力对聚晶金刚石表面质量的影响  

Effect of lapping pressure on surface quality of polycrystalline diamond

作　　者：孙国栋 李维翠 胡晋昭 李树强 黄树涛[2] SUN Guodong;LI Weicui;HU Jinzhao;LI Shuqiang;HUANG Shutao(Shandong Institute of Scientific and Technical Information,Jinan 250101,China;Shenyang Ligong University,Shenyang 110159,China)

机构地区：[1]山东省科学技术情报研究院,济南250101 [2]沈阳理工大学,沈阳110159

出　　处：《金刚石与磨料磨具工程》2024年第4期528-533,共6页Diamond & Abrasives Engineering

摘　　要：使用金刚石平磨盘对聚晶金刚石(polycrystalline diamond,PCD)复合片的金刚石层进行高速研磨实验,研究研磨压力对PCD研磨去除率、表面粗糙度和表面形貌的影响。结果表明:当研磨压力为0.10~0.18MPa时,随着研磨压力的增大,PCD的研磨去除率增大,表面粗糙度减小。PCD研磨表面缺陷主要包括沿晶破碎、微小凹坑、机械划痕、微裂纹等,且随着研磨压力增大,研磨表面平滑面积扩大,机械划痕变小。Objectives:Polycrystalline diamond(PCD),as a superhard material with high hardness,high wear resist-ance,and good impact toughness,has a wide range of applications in fields such as cutting tools for superhard materials.However,due to its high hardness,the precision surface processing of PCD has always been a technical challenge.This paper aims to study the influence of lapping pressure on the surface quality of PCD,particularly focusing on the materi-al removal rate,surface roughness,and changes in surface morphology under high-speed grinding conditions.Methods:The experiment adopts a single-factor test method,keeping the abrasive particle size W5 of the diamond flat grinding disc and the lapping speed of 43.3 m/s constant,while varying the lapping pressure(from 0.10 MPa to 0.18 MPa)to study its impact on the material removal rate,the surface roughness,and the surface morphology of polycrystalline dia-mond material.The experimental material is aϕ13 mm×2 mm polycrystalline diamond composite sheet with a dia-mond layer thickness of approximately 1 mm.The experimental apparatus is a high-speed grinding testing machine,which uses an electric spindle to drive the diamond flat grinding disc,with a lapping time of 20 minutes.The lapping process is conducted without the use of coolant to avoid its influence on the experimental results.Results:The experi-mental results indicate that the lapping pressure has a significant impact on the material removal rate of PCD.As the lapping pressure increases from 0.10 MPa to 0.18 MPa,the lapping removal rate increases from 0.005 mg/min to 0.030 mg/min,indicating that an increase in lapping pressure significantly improves material removal efficiency.The influ-ence of lapping pressure on the surface roughness of PCD is also significant.With an increase in lapping pressure,the surface roughness gradually decreases,reducing from a higher value at 0.10 MPa to a lower value at 0.18 MPa,with a roughness Ra reduction of approximately 0.020μm.The impact of lapping pressure on the surface

关 键 词：聚晶金刚石 高速研磨 研磨压力 材料去除率 表面质量 

分 类 号：TG580.1[金属学及工艺—金属切削加工及机床]