Conical twin screw barrel
Specification: φ 45 - φ 200
Materials and technology:
Nitriding treatment of 1.38CrMoAlA
Nitriding depth: 0.5-0.8mm, nitriding hardness: HV ≥ 920
2.42crmo electroplating: high frequency quenching + electroplating / bimetallic PTA + electroplating
Chromium plating hardness: ≥ HV800, thickness 0.03-0.05mm, roughness Ra0.2Um
3. SKD61 quenching and tempering, vacuum quenching + whole hardening treatment
Hardness index: HRC > 55 - 58, straightness 0.015mm/m, roughness ra0.4um
4.9cr18mov vacuum quenching and CNC round grinding
Hardness index: HRC > 50 -- 55, straightness 0.015mm/m, roughness ra0.4um
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