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          Twin Screw Barrel


          Zhoushan Jianghai Screws Manufacture Co., Ltd

          We offered high quality screw and barrel as your drawing.

          Technical Information for twin screw barrel for pipe extrusion
          Main Base Materials 1.38CrMoAlA (SACM645) Main Alloy Materials 1. Ni-based alloy/Deloro alloy
            2. SKD-61 (Special Tool Steel)   2. Tungsten carbide/Wolfram carbide
            3. 42CrMo (Ultrahigh StrengthSteel)   3. NiCo-based alloy
            4. DC53 (Cold WorkDie Steel)   4. Fe-based alloy
            5. W6Mo5Cr4V2 (High-SpeedToolSteel)   5. Co-based alloy
          Processing Technics 1. Heat treatment Technical Parameters Nitriding layer depth:0.5-0.8mm
            2. Quenching   Nitrided hardness:900-1000HV
            3. Nitriding treatment   Bimetallic layer depth:3 mm
            4. Bimetallic alloy welding for screw   Bimetallic hardness:57~69HRC
            5. Bimetallic alloy centrifugal casting for barrel   Hard-chrome plating hardness after nitriding:≥950HV
            6. Hard-chrome electroplating   Chrome-plating layer depth:0.03-0.09mm
            Linearity of screw:0.015mm   Surface roughness:Ra 0.4

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