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      1. Planetary mechanical screw barrel

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        Base material:

         

        (1) 38CrMoAlA(JIS SACM645)

        (2)42CrMo(AISI 4140)

         

        Treatment process:

        1. Heat treatment

        2. Nitriding treatment

         

        Technical parameters:

        1. Nitriding depth: 0.4mm-0.6mm

        2. Nitriding hardness: 850-950hv

        3. Nitriding brittleness: < = 1

        4. Surface roughness: Ra0.4

        5. Straightness of screw: 0.015mm

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