Blowing machine barrel screw

Product Details

Specification:

Screw diameter: φ15-φ300

Length to diameter ratio: 15-46

product type:

For different plastic products, the screw can be used: ordinary type, pin type, barrier type, separate type, exhaust type and so on.

Base material:

1) 38CrMoAlA (JIS SACM645)

2) 42CrMo (AISI 4140)

Processing process:

Heat treatment

Nitriding treatment

Technical Parameters:

Nitriding depth: 0.50mm-0.80mm

Nitriding hardness: 900-1000HV

Nitrided brittleness: <=1 level

Surface roughness: Ra 0.4

Screw straightness: 0.015mm

Surface chrome plating hardness after nitriding: ≥950HV

Plating layer thickness: 0.025~0.085mm

Double alloy depth: 3mm