Regulating the grinding performance of grindstones via using basalt fibers

For adapting to the working condition of high-speed rail grinding with strong impact and heat, the basalt fibers reinforced grindstones (BFRGs) were prepared. Their performances were evaluated from three aspects, including the mechanical properties of grindstones themselves, grinding behavior and grinding quality. The results show that basalt fibers significantly improve the strength of grindstone, which has reached up to 78.3 MPa increased by 25.5%. The heat effect of BFRGs drops as low as 159 ℃. After grinding, the thickness of white etching layer is reduced to 0.5 µm. The content of basalt fiber at 6.7 wt% in resin can achieve the optimum comprehensive performance, mainly depending on the advantages in blocking effect and rolling bearing of basalt fibers.