Key Performance Indicators and Technologies of Clutch Friction Plates
1. Friction Stability
Dynamic Response: The fluctuation of the friction coefficient must be maintained at <±15% within the sliding speed range of 0.1-10 m/s, which is achieved by adding molybdenum disulfide (MoS₂) or graphite.
Thermal Fade Control:
Mechanism: When the temperature exceeds 250℃, the binder decomposes to produce gaseous products (such as CO₂), resulting in a sharp drop in the friction coefficient (thermal fade rate > 30%).
Solution: Nano-sized ceramic particles (such as Al₂O₃) are used to reinforce the binder, increasing the initial temperature of thermal fade to 350℃.
2. Wear Resistance Life
Wear Mechanisms:
Adhesive Wear: Micro-protrusions on the surface of the metal counterpart embed into the friction plate, leading to material transfer (wear rate: 0.1-0.5 mm per 10³ cycles).
Abrasive Wear: Hard particles (such as clutch debris) scratch the surface, and this type of wear can be reduced by adding 3-5% silicon carbide whiskers.
Life Test: In accordance with the GB/T 5764-2023 standard, the wear rate at 300℃ must be ≤0.3 mm per 10³ cycles. This can be improved to ≤0.15 mm per 10³ cycles through laser surface cladding technology.
3. Thermal Management Capability
Heat Dissipation Design:
Structural Optimization: A wavy friction surface is adopted to increase the heat dissipation area by 30%. Combined with axial ventilation grooves, the heat flux density is reduced to below 1.5 W/cm².
Material Innovation: The new 2025 material "Thermofiber 2025X" improves thermal conductivity through a copper wire braided layer, with a heat dissipation rate 40% higher than that of traditional AOM (Advanced Organic Matrix) materials.
