Injection Screw Barrel for plastic machinery
Sketch of Business Flow
Technical specifications:
Hardness of adjuster: HB260-290
Hardness of nitration: HV800-1050
Depth of nitration: 0.4-0.7mm
Fragility of nitration: Less than grade 1
Roughness of the surface: Ra0.4
Linearity of the screw: 0.015mm
The surface hard chromium plating hardness after nitrogenation: ≥900HV
Chromium-plating layer thickness: 0.05-0.1mm
Hardness of double alloys: HRC56-65
Depth of double alloys: 0.8-2.0mm
Materials and processes:
Quality 38CrMoAIA
Quality twin-phase stainless
Quality satellite powder of surface spray
Cold alloys hot alloys
Advanced nitriding
Process of hot sprayed hard alloys
|
Technical Parameter |
| Steel Material | DIN 41CrA1Mo7 / AST M4140 / GB 38CrMoAlA |
| Deepness of Nitriding Layer | 0.7 mm -0.9 mm |
| Hardness of Nitriding | HV900 - HV1,000 |
| Nitriding Brittleness | ≤Grade 1 |
|
Chromate plating
|
Thickness 0.05 mm - 0.10 mm, hardness HV950 |
|
Special treatment
|
Carbide coating on screw flight and bimetallic barrel |
| Screw straight tolerance | 0.015 mm/m |
| Surface roughness | Ra 0.4μm |