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With advanced production equipment, all products undergo strict quality testing, ,and are exported to all over the world.
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Diameter: ¦Õ45-¦Õ200 £¨according to the demands of customers) L/D ratio:16-35 The compression ratio of screws can be designed according to different products and mixtures. Technical Parameter: Hardness After Hardening & Tempering:HB280-320 Nitrided hardness: 950-1100HV Nitrided layer depth:0.50-0.80mm Nitrided brittleness: Less than 2 level Surface roughness: Ra 0.4¦Ìm Linearity of screw: 0.015mm/m Bimetallic layer depth: ¡Ý3mm Bimetallic hardness: HRC60-72 Hard-chrome plating hardness after nitriding: ¡Ý950HV Chrome-plating layer depth: 0.025~0.10mm |
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