Effect of V8_C_7-Cr_3C_2 nanocomposite on microstructure and properties of vitrified bond cBN grinding tools prepared by microwave heating method

摘要

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 degrees 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. (C) 2018 Elsevier B.V. All rights reserved.