ELECTROLESS NICKEL COMPOSITES COMPONENT COATING
Electroless nickel composites coatings from ESK increase the functionality of parts by optimizing important properties:
- Wear protection
- Increasing friction (EKagrip®)
- Reducing friction
The surface properties are adjusted by choosing the dispersed substances individually. Hard substances, such as diamond, silicon carbide (SiC), boron carbide (B4C) or silicon nitride (Si3N4) can be incorporated to produce wear-resistant surfaces or selectively increase their coefficient of static friction.
Increasing Friction with EKagrip®
Increasing friction has become established as valuable design feature in, for example, mechanical engineering, textile machinery, power station engineering and auto racing. EKagrip® from ESK provides a friction-enhancing coating that permits lighter and more compact designs without compromises in force or torque transmission, for example in shaft/hub connections or interference fits.
Nickel Composites Coatings to Minimize Friction
Friction-minimizing nickel-composites coatings from ESK have a proven track record in auto racing and are increasingly being used in industrial applications. Boron nitride (hBN), PTFE (polytetrafluoroethylene) or PFA (perfluoroalkoxy copolymer) is embedded in the nickel layer. The sliding and emergency dry-running properties of these substances can result in surfaces with remarkably low friction and optimize the wear properties of tribological systems.
| Functional Coatings | |||
| Material properties | EKagrip® 10 | EKagrip® 20 PLUS | EKagrip® 25 PLUS |
| Form as supplied | Shim with EKagrip® 10 coating |
Shim with EKagrip® 20 PLUS coating |
Shim with EKagrip® 25 PLUS coating |
| Hard particle | Diamond | Diamond | Diamond |
| Mean particle size | 10 µm | 20 µm | 25 µm |
| Diamond-surface concentration |
8-16% | 8-20% | 8-25% |
| Matrix material | Electroless nickel phosphorus |
Electroless nickel phosphorus |
Electroless nickel phosphorus |
| Thickness of matrix y | 5-9 µm | 10-15 µm | 10-20 µm |
| Total layer thickness x | 10-20 µm | 20-30 µm | 25-35 µm |
| Heat treatment | 150°C ± 10°C 350°C ± 10°C |
150°C ± 10°C / 350°C ± 10°C |
350°C ± 10°C |
| Hardness of nickelphosphorus matrix |
approx. 600 HV / 900 HV |
approx. 600 HV / 900 HV |
approx. 900 HV |
| Color | metallic or charcoal | metallic or charcoal | metallic or charcoal |
| Shim material (preferably) | C 75 S (acc. to EN 10132-4) |
C 75 S (acc. to EN 10132-4) |
C 75 S (acc. to EN 10132-4) |
| Shim thickness d | 0.1 mm (others available on request) | 0.1 mm (others available on request) | 0.1 mm (others available on request) |
| Max. diameter for 0.1 mm thick shims (others available on request) |
200 mm | 200 mm | 200 mm |
| Thickness tolerance of base part before coating |
± 0.01 mm | ± 0.01 mm | ± 0.006 mm |
| Base part production by | Laser cutting or stamping |
Laser cutting or stamping |
Laser cutting or stamping |
| Mean roughness Rz of counterpart surface (transversal to direction of machining) |
Rz << 10 µm | Rz << 20 µm | Rz << 25 µm |
| Min. contact pressure | P > 50 MPa | P > 50 MPa | P > 50 MPa |
| Max. service temperature | 400°C | 400°C | 400°C |
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