Abstract
V8C7-Cr3C2 nanocomposite was synthesized by an in-situ microwave heating method using nanometer oxides and nanometer carbon black as raw materials. The effect of V8C7-Cr3C2 nanocomposite on microstructure and properties of vitrified bond cBN grinding tools prepared by microwave heating method was investigated. The vitrified bond cBN grinding tool doped with 4.0 wt% nanocomposite presented an improved microstructure and possessed excellent properties. The fluidity and refractoriness of vitrified bond were increased and reduced by about 45% and 50 °C, respectively. Additionally, the bending strength and Rockwell hardness of vitrified bond cBN grinding tools were increased by about 4.6% and 9.3%, respectively.
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