Tungsten carbide (silicon) roller

　　technical requirement

　　●Coaxiality and cylindricity (jump measurement) ≤ 0.002mm

　　●Dynamic balance g2.5

　　●Straightness ≤ 0.002mm

　　●Tightness test: air pressure test 6kg, pressure holding for 3 hours, no leakage

　　●Thickness of WC layer ≥ 200um

　　●Shaft head conditioning hrc27-30

　　●Surface hardness HRC ≥ 65

　　●Surface roughness Ra ≤ 0.01um

　　●The internal flow passage adopts cross convection structure

　　●The surface temperature difference is within ± 0.5 ° and the thermal imaging report is provided