Spheroidizing Annealing Furnace for Bearing Steel Parameter Table
| Item | Specification |
|---|---|
| Furnace Type | Strong Convection Spheroidizing Annealing Furnace |
| Workpiece | Bearing Steel Wire Rods & Coils |
| Batch Capacity | 2–40 Tons |
| Effective Diameter | 1200–4000 mm |
| Effective Height | 1800–4000 mm |
| Heating Method | Electric or Natural Gas |
| Heating Rate | 75–650 kW |
| Protective Atmosphere | Nitrogen / Cracked Ammonia / Mixed Gas |
| Control System | PLC Automatic Control |
| Optional Devices | Oxygen Probe, Carbon Potential System, Infrared Analyzer |
Spheroidizing Annealing Furnace Technical Advantages
Excellent Spheroidization Performance
The furnace combines precise temperature control with strong forced convection to promote uniform carbide spheroidization throughout the entire steel coil. This produces a fine and evenly distributed spheroidized structure, improving machinability while reducing forming resistance.
Benefits
- High spheroidization rate
- Uniform carbide distribution
- Improved cold forming performance
- Better machining efficiency
Uniform Heating Throughout Large Coil Batches
Bearing steel coils have high density and require excellent heat penetration. The strong convection circulation system continuously transfers heat throughout the furnace chamber, reducing temperature differences between the center and outer layers of the load.
Benefits
- Consistent hardness
- Reduced temperature deviation
- Stable metallurgical structure
- Improved product quality
Protective Atmosphere for Surface Integrity
A controlled atmosphere minimizes oxidation and decarburization during long annealing cycles, helping maintain the original surface condition of bearing steel.
Benefits
- Clean surface finish
- Low decarburization
- Reduced oxide scale
- Stable processing environment
Intelligent Control for Repeatable Production
The furnace adopts a PLC-based automation system that manages every stage of the annealing cycle, from heating and soaking to controlled cooling. Multiple process recipes can be stored for different bearing steel grades, improving production consistency while reducing operator intervention.
Features
- Automatic temperature programming
- Multi-zone temperature control
- Process data recording
- Alarm and safety protection
- Recipe management
The furnace is suitable for a variety of spheroidizing and annealing processes, including:
- Spheroidizing annealing of bearing steel wire rods
- Soft annealing of high-carbon steel
- Annealing before cold heading
- Annealing before wire drawing
- Heat treatment of spring steel coils
- Stress relief after forming
- Batch heat treatment of alloy steel coils
Typical materials include:
- GCr15 bearing steel
- SAE 52100 bearing steel
- High-carbon steel
- Spring steel
- Chromium alloy steel
- Cold heading steel
- Medium carbon alloy steel
FAQ
1.What types of bearing steel can be processed?
The furnace is suitable for GCr15, SAE 52100, chromium bearing steels, alloy bearing steels, and other high-carbon bearing materials.
2.What is the purpose of spheroidizing annealing?
Spheroidizing annealing transforms lamellar carbides into fine spherical carbides, improving machinability, ductility, and cold-forming performance while reducing tool wear.
3.How does the furnace improve spheroidization quality?
A combination of precise temperature control, strong convection heating, and controlled cooling promotes uniform carbide transformation throughout the entire coil.
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