Rubber extruder screw barrel technical parameters

Quenched hardness: HB260-290

Hardness of nitration: HV800-1050

Nitriding depth :0.4-0 .7 mm

Nitride crispness: ≤ a

Surface roughness: Ra0.4

Screw straightness: 0.015mm

Nitride surface chrome layer hardness: ≥ 900HV

Chrome thickness :0.05-0 .10 mm

Dual alloy hardness: HRC56-65

Alloy depth :0.8-2 .0 mm