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China, Chinese Screw and Barrel for Plastic Extrusion Line1 Industrial Products Supplier Manufacturer Details, price list catalog:
China Industrial Products Supplier Manufacturer List Catalog
Plastic MachineryPlastic Machinery PartsStainess Steel Screw and BarrelWear Resistant Extruder Screw
GPM Machinery (Shanghai) Co., Ltd.
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Product Description Product DescriptionCommon Materials At present, China has a material commonly used screw 45 steel, 40Cr, ammoniation steel, 38CrMOAl, high-temperature alloys.1) 45 steel cheap, processing performance, but poor corrosion resistance wear.Heat treatment: quenching HB220-270, induction hardening HRC45--48.Performance2) 40Cr steel is better than 45, but often coated with chromium to improve their resistance to corrosion and wear. But require a higher layer of chrome coating is too thin easy to wear, thick is easy peeling, flaking but accelerated corrosion, has been rarely used.Heat treatment: quenching HB220-270, hard chrome plating HRC> 553) nitriding steel, 38CrMoAl relatively excellent overall performance, used widely. Usually the nitride layer of 0.4-0.6 mm. But this material ability to resist corrosion of hydrogen chloride is low, and the price is higher.4) high-temperature alloy material is superior to other materials, the material without coating, injection molding machine is mainly used for raw halogen-free screw, the material is anti-oxidation high corrosion resistance, heat hra55`60.Quenched HB220-270, nitriding HRC> 65Titanium carbide coated foreign helpful ways to improve the corrosion resistance of the surface of the screw, but it was reported that its abrasion resistance is not good enough.Foreign taken a series of measures in improving the screw wear corrosion resistance. One approach is the use of highly wear-resistant alloy steel. As 34CrAlNi ,, 31CrMo12 like. There take the screw surface coating Xaloy alloy method. This Xaloy alloy with high wear and corrosion properties.
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