1. Material Composition & Design
Bimetal bushings combine a steel backing with sintered bronze/copper alloy layers for enhanced load capacity and wear resistance. Key material configurations include:
· Base Layer: Low-carbon steel (e.g., DIN St12) for structural strength and shock absorption.
· Friction Layer:
· CuPb10Sn10: High lead-tin bronze alloy for heavy loads (static load ≤120 N/mm²) and moderate speeds
· CuSn6Zn6Pb3: Zinc-modified bronze for improved corrosion resistance in marine environments38.
· Surface Treatments: PTFE coatings or graphite impregnation for self-lubrication in oil-starved conditions
2. Manufacturing Processes
00001. Powder Sintering:
· Bronze/copper alloy powders (e.g., CuPb10Sn10) sintered onto steel substrates at 800–900°C to form metallurgical bonds
· Porosity controlled at 15–25% for oil retention in oil-impregnated variants
00002. Groove Engineering:
· Laser-engraved diamond or helical oil grooves to optimize lubricant distribution under high-speed rotation (>3000 rpm)
00003. Post-Processing:
· Electroplating (e.g., tin or nickel) for corrosion resistance in acidic or humid environments
3. Performance Advantages
|
Parameter |
Value/Feature |
|
Load Capacity |
Static: ≤120 N/mm²; Dynamic: ≤60 N/mm² |
|
Friction Coefficient |
0.08–0.12 (dry); 0.03–0.06 (lubricated) |
|
Temperature Range |
-30°C to +180°C (continuous operation) |
|
Wear Resistance |
≤0.1 mm/1000h under 50 N/mm² load |
4. Industrial Applications
· Automotive:
· Balance shaft bushings in heavy-duty trucks (e.g., AMW trucks) and gearbox bearings for EVs58.
· Engine components (e.g., connecting rod bushings) requiring high thermal stability
· Construction Machinery:
· Track rollers in bulldozers and excavator pivot joints subjected to impact loads (>50 kN)
· Renewable Energy:
· Wind turbine yaw systems with graphite-embedded variants for maintenance-free operation
5. Market Trends & Innovations
00001. Sustainability: Adoption of low-energy sintering processes reducing CO₂ emissions by 15–20%
00002. Customization: On-demand laser grooving for niche applications (e.g., aerospace actuators)
00003. Hybrid Materials: Steel-aluminum composite bushings for lightweight electric vehicles (25% mass reduction)
Global Market Outlook: Bimetal bushings dominate 35% of the self-lubricating bearing market, with a projected CAGR of 4.8% (2025–2030), driven by EV adoption and industrial automation
6. Contact Information:
Company name: Hunan Jintai Hardware And Machinery Co.,Ltd
Address: Rm.426, Hunan International Commerce Centre,Jintai Square,410001 Changsha,Hunan,P.R.China
Contact: Ms. Susan Shi
Cell(whatsapp): 0086 13517489983
Email: susan@slide-bearing.com
Wechat: s33606