Performance Indicators of Grinding Tools with Cubic Boron Nitride Grains with Combined Wear-Resistant Coatings

IF 1.2 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY Journal of Superhard Materials Pub Date : 2024-09-06 DOI:10.3103/S1063457624040087

V. I. Lavrinenko, V. G. Poltoratskyi, O. O. Pasichnyi, V. Yu. Solod

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Abstract

We investigated the effect of surface coatings on cubic boron nitride (cBN) grains regarding tool wear resistance and processing efficiency. At a low processing rate (50 mm³/min), the wear resistance enhancement factor was 1.66 for the B₂O₃ + CeO₂ coating. Conversely, at a higher processing rate (200 mm³/min), the wear resistance enhancement factor decreased to 1.13 for the B₂O₃ + B₄C coating. The study demonstrated that under these processing conditions, surface coating of cBN grains with a combination of oxide and carbide (B₂O₃ + SiC) is preferable. This preference is based on improved grinding wheel wear resistance and reduced surface roughness (R_a) of the machined surface. Furthermore, at increased grinding efficiency, any coating on cBN grain surfaces decreases the t50 parameter, thereby decreasing the holding capacity of the rough surface generated during grinding with such wheels.

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立方氮化硼晶粒与复合耐磨涂层磨削工具的性能指标

摘要我们研究了立方氮化硼（cBN）晶粒表面涂层对刀具耐磨性和加工效率的影响。在低加工率（50 mm3/min）下，B2O3 + CeO2 涂层的耐磨性增强系数为 1.66。相反，在较高的加工率（200 mm3/min）下，B2O3 + B4C 涂层的耐磨性增强因子降至 1.13。研究表明，在这些加工条件下，采用氧化物和碳化物组合（B2O3 + SiC）对 cBN 晶粒进行表面涂层更为可取。这种优选是基于砂轮耐磨性的提高和加工表面粗糙度（Ra）的降低。此外，在磨削效率提高的情况下，CBN 晶粒表面的任何涂层都会降低 t50 参数，从而降低使用此类砂轮磨削时产生的粗糙表面的保持能力。

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来源期刊

Journal of Superhard Materials MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

1.80

自引率

66.70%

发文量

审稿时长

2 months

期刊介绍： Journal of Superhard Materials presents up-to-date results of basic and applied research on production, properties, and applications of superhard materials and related tools. It publishes the results of fundamental research on physicochemical processes of forming and growth of single-crystal, polycrystalline, and dispersed materials, diamond and diamond-like films; developments of methods for spontaneous and controlled synthesis of superhard materials and methods for static, explosive and epitaxial synthesis. The focus of the journal is large single crystals of synthetic diamonds; elite grinding powders and micron powders of synthetic diamonds and cubic boron nitride; polycrystalline and composite superhard materials based on diamond and cubic boron nitride; diamond and carbide tools for highly efficient metal-working, boring, stone-working, coal mining and geological exploration; articles of ceramic; polishing pastes for high-precision optics; precision lathes for diamond turning; technologies of precise machining of metals, glass, and ceramics. The journal covers all fundamental and technological aspects of synthesis, characterization, properties, devices and applications of these materials. The journal welcomes manuscripts from all countries in the English language.