Research on the Structure and Properties of High Temperature and High Pressure Composite PCBN Tool Materials

IF 1.2 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Superhard Materials Pub Date : 2023-07-19 DOI:10.3103/S1063457623030188

Mo Peicheng, Chen Jiarong, Chen Chao, Hu Qiaofan, Xiao Leyin, Lin Feng, Pan Xiaoyi

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Abstract

Using CBN, Si₃N₄, Al₂O₃, AlN and Y₂O₃ as raw materials, PCBN tool materials were prepared by high temperature and high pressure. The effects of sintering temperature (1400–1700°C) on the microstructure, mechanical properties and cutting performance of tool materials were studied. The results show that PCBN tool materials with higher density and better comprehensive properties can be obtained by using high temperature and high pressure technology. At 1500°C, it was observed that the α-Si₃N₄ in the binder had a tendency to transform to β-Si₃N₄, and the grains were well developed. With the increase of sintering temperature, the density, flexural strength, and hardness of the samples increased continuously. At 1700°C, the flexural strength and hardness reached 879.6 MPa and 38.8 GPa, respectively. At the same time, the cutting performance of the samples sintered at 1700°C is also the best. When cutting ductile cast iron with a cutting distance of 7 km, the tool wear is the smallest, which is 0.26 mm.

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高温高压复合PCBN刀具材料的结构与性能研究

以CBN、Si3N4、Al2O3、AlN和Y2O3为原料，通过高温高压制备了PCBN刀具材料。研究了烧结温度(1400 ~ 1700℃)对刀具材料显微组织、力学性能和切削性能的影响。结果表明，采用高温高压技术可获得密度更高、综合性能更好的PCBN刀具材料。在1500℃时，观察到粘结剂中的α-Si3N4有向β-Si3N4转变的趋势，晶粒发育良好。随着烧结温度的升高，试样的密度、抗弯强度和硬度不断增大。在1700℃时，其抗弯强度和硬度分别达到879.6 MPa和38.8 GPa。同时，1700℃烧结试样的切削性能也最好。切削距离为7 km的球墨铸铁时，刀具磨损最小，为0.26 mm。

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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.