Tungsten carbide roller ring is a kind of metallurgical tool which consists of tungsten carbide and cobalt with high hardness and wear resistance. It has advantage of high wear resistance,Website:http://www.kdroll.com, long life and high efficiency during the high speed rolling. 1. Geometry Tolerance Axial Run-outRadial Run-outEnd Face Run-outEnd Face ParallelismEnd Face Flatness≦0.015mm≦0.02mm≦0.015mm≦0.01mm≦0.01mm2. RoughnessInner HoleOuter CircleEnd FaceGroove Face≦ 0.3 μm≦ 0.4 μm≦ 0.4 μm≦ 0.8 μm3. PerformanceNo.Chemical CompositionMechanical PropertiesPhysical PropertiesCo+Ni %WC %HardnessHRATRSISO BMPaPress StrengthMPaYoung's ModulusKN/mmDensityg/cm3Thermal ConductivityCal/cm/sec/c11090≥86.0≥2500350056014.2-14.50.221585≥83.5≥2520330054013.8-14.20.232080≥82.0≥2570310048013.3-13.90.1842575≥79.0≥2400280042012.9-13.40.1753070≥78.5≥2200260030012.6-13.10.16