... Chilled steel, 2High-speed steel, High-carbon steel 1.silicon carbide fiber disc, has good flexibility, high Intensity and high Wear-resisting ... quantity of ZrO increases.2.Only no harder than Boron carbide and Diamond, friable, its girt is sharp, and Thermal conductivity3 ... strength metallic and Nonmetallic material, i.e. single alundum silicon carbide fiber disc