Detailed Product Description
Zhongyang screw manufacturing co.,ltd insisted in "quality leads to develop, credit leads to market" all the time. We manufacture screws and barrels for many kind of machinery such as extruder, injection machinery, plastic and rubber processing machinery. If you have any requirement, you can contactr me. We also can design according to your specication. Please view technicals and parameter for some of our screws and barrels.
Material: 38CrMoAlA 40CrMo 42CrMo high quality alloy steel
Technology: Nitriding treatment, alloy coating spraying, heating treatment, screw fully hardening,
Depth of nitrition layer: 0.5-0.8mm
Nitriding treatment, surface hardness: HV≥900-1000
Fragility of nitrition: Less than grade 1
Surface roughness: Ra 0.4um
Straightness of screw: 0.015mm
Surface of hardness of nitrated Cr coating layer: ≥950HV
Hardness of Cr coating layer: HRC55-62
Thickness of alloy plating: 0.03-0.08mm
Depth of alloy layer: 2mm
