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Screw And Barrel for Single Screw Extruder

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Product Description

Material: 38CrMoAlA

Alloy (bimetal)

Technicl process

1. Heat treatment

2. Quenching

3. Nitriding treatment

4. Bimetallic alloy welding for screw

5. Bimetallic alloy centrifugal casting for barrel

6. Hard-chrome electroplating

Technical parameters

Nitriding layer depth:0.5-0.8mm

Nitrided hardness:900-1000HV

Bimetallic layer depth:3 mm

Bimetallic hardness:57~69HRC

Hard-chrome plating hardness after nitriding:≥950HV

Chrome-plating layer depth:0.03-0.09mm

Surface roughness:Ra 0.4

Linearity of screw:0.015mm


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