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Extruder screw barrel technical indicators
發表時間：9/6/2017 11:48:00 AM  點擊：38
Technical indicators:
Material selection of high quality 38 chrome molybdenum aluminum(38CrMOALA)quenched and tempered:HB240~280
Nitriding hardness:HV≥850
Nitriding depth:0.45to 0.80mm
Nitriding brittleness:≤ two
Surface roughness:Ra0.4
Screw Straightness:0.015mm
After the nitriding surface hard chrome plating:HV ≥ 900
Chromium layer thickness:0.03 ~ 0.10mm
Double alloy hardness:HRC56 ~ 65 (alloy with nickel-based alloy)
Alloy depth:1.2~3.0mm

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