Ningbo Tianze Machinery Technology Co.,

Specification:<br /> Diameter: Ø15-Ø500<br /> L/D ratio:15-55<br /> Base Materials:1)38CrMoAlA(SACM 645)<br /> 2)42CrMo(AISI 4140)<br /> 3)Cr12MoV(SKD11)<br /> 4)4Cr5MoSiV1(SKD61)<br /> 5)9Cr18MoV<br /> 6)40Cr<br /> Bimetallic Alloy Materials:1)Fe-based alloy<br /> 2)Ni-based alloy<br /> 3)Co-based alloy<br /> 4)Tungsten carbide<br /> Processing Technology:Heat treatment<br /> High-frequency quenching<br /> Nitriding treatment<br /> Hard-chrome electroplating<br /> Bimetallic alloy welding<br /> Technical Parameter:Nitrided layer depth:0.50-0.80mm<br /> Nitrided hardness: 900-1100HV<br /> Nitrided brittleness: Less than 2 level<br /> Surface roughness: Ra 0.4<br /> Linearity of screw: 0.015mm<br /> Hard-chrome plating hardness: ≥950HV<br /> Chrome-plating layer depth: 0.025~0.10mm<br /> Bimetallic layer depth: 2 mm<br /> Bimetallic hardness: HRC50-65<br /> Material to be extruded:PP, PE, PVC, ABS, AS, PS etc.<br /> We can manufacture all types of screws and barrels according to clients’ requirement.