| Message: | a.Advanced Nitriding Technology. b.Anti-corrosion and Wear-resisting Duplex Metal Spraying Technology . c.we uses special alloy powders being sprayed and welded on the screw's ridge,and usesdifferent alloy and welding methods for the screw of different functions. Specification:screw diameterø20-ø500mmMaximum screw length10000mmBarrel inner bore diameterø500mmMaterailA.38crmoala in high quality B.alloy steel in high qualityTechnologyA.nitriding treatment B.alloy coating spraying C.heating treatment D.screw fully hardening E.vacuum quenching F.electroplate hard chromeTechnical parameterA:depth of nitrition layer: 0.6-0.8mm B:nitriding treatment for 7 day and night, surface hardness HV>900 C:fragility of nitriding: less than grade 1 D:surface roughness: ra0.4um E:streightness of screw: 0.015mm F:depth of bimetallic layer>2mm G:hardness of alloy platig: HRC 62-72 H:surface of hardness of chrome coating layer: HRC 62-72 I:thickness of chrome coating layer: 0.03-0.06mmPackaging: Company Information Waiting for your inquiry.Welcome to visit our company. url:http://www.pbplastic.com |
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