【摘要】 在金刚石锯片切割研磨性较弱的材料时，通常需要对胎体性能进行弱化处理，以此提升刀头的自锐性，实现锯片锋利度的优化。为明确不同粒度石墨添加对金刚石锯片刀头胎体性能及锯片锋利度的影响，本文开展了系统性研究。研究结果显示：相较于未添加石墨的空白对照组，添加30-40目粗粒度石墨的金刚石锯片切割效率提升幅度可达23%～58%;添加40-60目中粒度石墨的锯片切割效率提升约14%～28%;而添加200-300目以及325目细粒度石墨的锯片，切割效率提升幅度相对较小，仅为5%～10%。针对这一差异的机理分析表明：粗粒度石墨在胎体中的分布间距更大，可形成孔径更大的连通润滑通道，能够在切割过程中更有效地发挥润滑减摩作用，因此对切割效率的提升效果更为显著；细粒度石墨在胎体中分散性更好、分布更均匀，可优化胎体整体组织结构的均匀性，能够获得平整度更高的切割面。更多还原

【Abstract】 When cutting materials with weak abrasive properties with diamond saw blades, it is usually necessary to weaken the performance of the matrix in order to improve the self sharpness of the blade and optimize the sharpness of the saw blade. To clarify the effect of adding graphite of different particle sizes on the performance of diamond saw blade head matrix and blade sharpness, this paper conducted a systematic study. The research results show that compared to the blank control group without added graphite, the diamond saw blade with 30-40 mesh coarse-grained graphite can increase the cutting efficiency by 23% to 58%. The cutting efficiency of saw blades with 40-60 mesh graphite particles is improved by about 14% to 28%. However, the addition of 200-300 mesh and 325 mesh fine-grained graphite saw blades resulted in a relatively small increase in cutting efficiency, only 5% to 10%. The mechanism analysis for this difference shows that the distribution spacing of coarse-grained graphite in the matrix is larger, which can form connected lubrication channels with larger pore sizes, and can more effectively exert lubrication and friction reduction effects during the cutting process. Therefore, the improvement effect on cutting efficiency is more significant. Fine grained graphite has better dispersion and more uniform distribution in the carcass, which can optimize the uniformity of the overall microstructure of the carcass and obtain a cutting surface with higher flatness.更多还原