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首页> 外文期刊>Journal of the Chinese Society of Mechanical Engineers, Series C: Transactions of the Chinese Society of Mechanical Engineers >Wear Behaviors of CBN Composites Impregnated with Micrographite
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Wear Behaviors of CBN Composites Impregnated with Micrographite

机译：浸渍微石墨的CBN复合材料的磨损行为

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摘要

The wear behaviors of cubic boron nitride (CBN) abrasive matrices incorporating micrographite particles by resin bonding were investigated. Composite specimens containing 50, 75, and 100 CBN concentrations and 0.1, 1, and 5 wt% graphite were prepared by compression molding. Cu, SiC, and A12O3 were each tested for dressing the CBN composite specimens. A carrier, attached to the spindle of the grinder, was designed and manufactured in a grinding wheel-like shape to hold the CBN composite specimens in place for the grinding processes. The worn surfaces of the CBN composites were examined using scanning electron microscopy. The surface characteristics and wear rate of the CBN composite specimens, as well as the material removal rate and the surface roughness of the SKD11 steel workpiece, were investigated under dry grinding conditions. The experimental results indicated considerable improvement in the processing performance of the graphite-impregnated CBN structure. Workpieces ground by specimens with graphite content below 1 wt% exhibited better surface roughness and topography, as well as higher material removal rates. Only a small amount of the specimen material was consumed, indicating the long lifetime of the grinding wheel. Increased CBN concentration increased the material hardness of the specimens and reduced the consumed material. Using Cu as a dressing material significantly reduced the time necessary to dress the CBN specimen. Wear of the CBN abrasive occurred mainly by the removal of CBN grains from the matrix and the retention of breakage grit on the binding resin.
机译：研究了通过树脂粘结结合了微石墨颗粒的立方氮化硼（CBN）磨料的磨损行为。通过压缩模制制备包含50、75和100 CBN浓度以及0.1、1和5 wt％的石墨的复合样品。分别测试了Cu，SiC和Al2O3来修整CBN复合材料样品。附接到磨床主轴上的支架被设计和制造成砂轮状，以将CBN复合材料样品固定在磨削过程中。使用扫描电子显微镜检查了CBN复合材料的磨损表面。在干磨条件下研究了CBN复合材料试样的表面特性和磨损率，以及SKD11钢工件的材料去除率和表面粗糙度。实验结果表明，石墨浸渍的CBN结构的加工性能有了很大的提高。用石墨含量低于1 wt％的试样研磨的工件表现出更好的表面粗糙度和形貌，以及更高的材料去除率。仅消耗了少量的样品材料，表明砂轮的使用寿命长。 CBN浓度增加会增加样品的材料硬度，并减少消耗的材料。使用铜作为修整材料可以显着减少修整CBN标本所需的时间。 CBN磨料的磨损主要是由于从基体中去除了CBN晶粒，并在粘结树脂上保留了碎屑。

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