Bimetallic Screw Barrel (Nitrided) 

Bimetallic Screw Barrel(welded) Specification: Screw diameter: Φ 15mm-Φ 300mm Maximal length: 8000mm Barrel inner diameter: 15-300mm Maximal length: 4000mm Different bimetallic alloys are available for different raw materials. Technical Information Base Materials: 1)38CrMoAlA(JIS SACM645) 2)42CrMo(AISI 4140) 3)9Cr18MOV Bimetallic alloy materials: 1)Fe-based alloy 2)Ni-based alloy/Deloro alloy 3)Co-based alloy 4)NiCo-based alloy 5)Tungsten carbide/Wolfram carbide Technics: Heat treatment High-frequency quenching Nitriding treatment Hard-chrome electroplating Bimetallic alloy welding Bimetallic alloy centrifugal casting Technical parameter: Nitrided layer depth: 0.5-0.8mm Nitrided hardness: 900-1000HV Nitrided brittleness: Less than grade 1 Surface roughness: Ra0.4 Linearity of screw: 0.015mm Hard-chrome plating hardness after nitriding: >=950HV Chrome-plating layer depth: 0.025-0.085mm Bimetallic layer depth: 3mm Warranty a…