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Extruder screw barrel technical indicators
發表時間：2017-5-1 11:17:42  點擊：366
Technical indicators:
The
Material selection high-quality 38 chromium molybdenum aluminum (38CrMOALA) hardening and tempering hardness: HB240 ~ 280
Nitriding hardness: HV ≥ 850
Nitriding depth: 0.45 ~ 0.80mm
Nitriding brittleness: ≤ two
Surface roughness: Ra0.4
Straightness of screw: 0.015mm
Hard chrome plating after nitriding: HV ≥ 900
Chrome plating thickness: 0.03 ~ 0.10mm
Double alloy hardness: HRC56~65 (alloys use nickel base alloy)
Alloy depth: 1.2~3.0mm
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