parallel twin screw and barrel

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parallel twin screw and barrel
Posting date : Jul 07, 2010
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85-
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Material:High quality alloy steel 1)38CrMoAlA 2)42CrMo 3)9Cr18MoV Technics:1)Heat-treatment 2)Nitriding treatment 3)Hard-chrome electroplated 4)Bimetallic-alloy coating spraying Technical parameter Nitriding depth:0.50-0.80mm Nitriding hardness:900-1000HV Nitriding brittleness:Less than grade 1 Surface roughness:Ra0.4 Linearity of the screw:0.015mm Hardness of the chromium plating after nitriding:More than 950HV Chrome plating thickness:0.025-0.085mm

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