single screw and barrel
•Product Specification and technical data
•inner Diameter : Ø20-Ø300
•Effective length: 12000mm
•Hardness of quenching and tempering: HB240°～280°
•Hardness of nitration: HV850°～1000°
•Depth of Nitrated Layer: 0.45～0.7mm
•Fragility of nitration: ≤Grade 2
•Surface roughness : Ra0.4
•straightness: 0.015mm
•Hardness of Cr-coating Layer: HV≥900HV
•Nitrided layer thickness: 0.05～0.10mm
•Thickness of Cr-coated Layer: 0.8～2.0mm :
•Hardness of bimetallic alloy: HRC56°～65°(Ni-based alloy)
•Material :quality alloy steels
•① 38CrMoALA(JIS SACM645)
•② 42CMo(JIS SCM440)
•③ 9Cr18MoV
•④ CW6Mo5Cr4V2
•Heat-treatment:
Nitriding treatment
Nitriding treatment
•Electroplated hard-chrome finish
•High-frequency quenching
•Spray coating Bimetallic-alloy
•vacuum quenching