Introduction to Truck Brake Shoes Metallic-Based Mixture
Truck brake shoes metallic-based mixtures are advanced friction materials engineered to deliver superior braking performance under heavy-duty conditions. These formulations combine metallic components with binding agents and additives to optimize friction efficiency, thermal stability, and durability. Below is a detailed overview of their composition, technical specifications, advantages, and storage guidelines.
Technical Parameters
The following table outlines key properties of a typical metallic-based brake shoes mixture:
| Parameter | Specification | Remarks |
|---|---|---|
| Metallic Content | 50-70% (Iron, Copper, Steel fibers) | Enhances heat dissipation |
| Density | 2.6-3.2 g/cm³ | Balances weight and strength |
| Friction Coefficient (μ) | 0.35-0.45 (Dry) | Stable across temperature ranges |
| Operating Temperature | -50°C to 700°C | Resists thermal fade |
| Compressive Strength | ≥300 MPa | Withstands high hydraulic pressure |
| Wear Rate | ≤0.5 cm³/MJ | Extended service life |
| Shore Hardness | 60-75 Shore D | Optimized for drum contact |
Key Advantages
- High Thermal Resistance
Metallic components (e.g., iron, copper) efficiently dissipate heat, reducing brake fade during prolonged use . - Consistent Friction Performance
The brake shoes formula ensures stable friction coefficients across varying speeds and temperatures, critical for heavy trucks . - Durability
Reinforced with steel fibers, the brake shoes friction materials exhibit low wear rates, suitable for high-mileage applications . - Noise Reduction
Additives like graphite or ceramic particles minimize vibration and squeal . - Compatibility
Designed to work seamlessly with cast iron or composite brake drums .
Storage and Packaging
- Moisture Control: Store in sealed, moisture-resistant packaging to prevent oxidation of metallic components.
- Temperature: Avoid prolonged exposure to temperatures above 40°C or below -10°C.
- Stacking: Limit stacking height to 5 layers to prevent deformation.
- Shelf Life: 24 months in original, unopened packaging.
Application of brake shoes mixes
The brake shoes mixes are molded under high pressure (15-30 MPa) and vulcanized to ensure adhesion between the friction layer and shoe plate . Post-production, they undergo rigorous testing for shear strength (≥3.8 MPa) and thermal cycling resistance .
For customized formulations or bulk orders, manufacturers often adjust the brake shoes mixture ratios to meet specific OEM or aftermarket requirements .
This combination of advanced materials and precision engineering ensures reliable braking performance for commercial vehicles operating in demanding environments.