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Technical parameter

Quenched and tempered hardness：HB260-290

Nitriding hardness：HV800-1050

Depth of nitriding layer：0.4-0.7mm

Nitrided brittleness：More than one level

Surface roughness：Ra0.4

Screw straightness：0.015mm

The hardness of the chromium plating layer after nitriding：≥900HV

Chromium plating thickness：0.05-0.10mm

Double alloy hardness：HRC56-65

Double alloy depth：0.8-2.0mm

Materials and processes

High quality 38CrMoAIA

High quality duplex stainless steel

High quality powder metallurgy material

Cold, hot sprayed hard metal process

Advanced nitriding process

Corrosion resistant and wear-resistant bimetallic spraying process

Rubber screw, barrel series

Basic material of screw machine barrel：38CrMoALA

Post modulation hardness：HB260-290

Nitriding depth：0.40-0.70mm

surface hardness：HV940-1050

Surface roughness：Ra0.4um

Screw straightness：0.015mm

The hardness of the chromium plating layer after nitriding:：More than 950HV

Chromium plating thickness：0.03-0.08mm

Double alloy hardness：HRC55-62