Double alloy screw barrel


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                  Screw diameter: 15-300mm

                  Maximum length: 8000mm

                  Inner diameter of barrel: 15-300mm

                  Maximum length: 4000mm


                  Different alloy materials can be selected according to different raw materials


                  Base material:

                  1)38CrMoAlA(JIS SACM645)

                  Alloy material:

                  1) Nickel base alloy + tungsten carbide



                  Treatment process:

                  heat treatment

                  Nitriding treatment

                  Spraying bimetal alloy

                  Centrifugal casting of bimetal alloy


                  Technical parameters:

                  Nitriding depth: 0.50mm-0.80mm

                  Nitriding hardness: 58-62hrc

                  Surface roughness: RA 0.4

                  Straightness of screw: 0.015mm

                  Double alloy depth: 3mm

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