Thermal Phenomena on the Front Surface of Tools with PcBN during Turning of Hardened Steel

IF 1.2 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY Journal of Superhard Materials Pub Date : 2023-11-13 DOI:10.3103/S1063457623050064

S. A. Klymenko, S. An. Klymenko, M. Yu. Kopіeіkina, A. S. Manokhin, Yu. O. Melniychuk

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Abstract—

The paper presents the results of determining the temperature at flash spots on the front surface and the cutting temperature when turning hardened steel with a tool made of PcBN of the BH group. Based on the experimental data on the dimensions of the chip-tool contact area, its topographic characteristics, and the level of loads on the tool’s front surface, a theoretical calculation of the flash point temperature in the tool contact zone was performed. It was found that the change in temperature at the flash spots with increasing cutting speed is extreme: at a cutting speed of 2 m/s, the temperature at the flash spots exceeds 2000°C on the plastic and 1000°C on the elastic parts of the contact area. Using an experimental and computational approach, the level of cutting temperature was determined, which increases with increasing cutting speed and reaches 1200°C. It is proved that, in accordance with the decrease in the temperature at the flash spots when machining at a cutting speed of more than 2 m/s, the intensity of the increase in the cutting temperature, which characterizes the average temperature at the contact area of the tool, decreases.

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淬硬钢车削过程中PcBN刀具前表面的热现象

摘要:本文介绍了用BH族PcBN刀具车削淬硬钢时，前表面闪点温度和切削温度的测定结果。基于刀具与切屑接触区域的尺寸、形貌特征以及刀具前表面的载荷水平等实验数据，对刀具接触区域闪点温度进行了理论计算。研究发现，随着切削速度的增加，闪点处的温度变化是极端的:当切削速度为2m /s时，接触区域的塑料部分的闪点温度超过2000℃，弹性部分的闪点温度超过1000℃。采用实验和计算相结合的方法确定了切削温度水平，该温度随切削速度的增加而增加，达到1200℃。结果表明，当切削速度大于2 m/s时，切削温度升高的强度随切削速度大于2 m/s而减小，切削温度升高的强度表征刀具接触区域的平均温度。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.