Pit Type Heat Treatment Furnace
The furnace combines strong convection heating, reinforced insulation, and PLC-based automation to provide precise temperature control. Crane-assisted loading simplifies handling of wire coils or batch steel components while maintaining uniform annealing results.
Applications
- Spheroidizing Annealing: Improves ductility of medium- and high-carbon steel wire.
- Softening Annealing: Reduces hardness for better machinability.
- Stress Relieving: Removes residual stresses after forming or coiling.
- General Annealing: Suitable for automotive fasteners, aerospace components, bearing steel rods, and industrial wire coils.
Suitable Workpieces
- Steel wire coils (automotive, aerospace, and industrial applications)
- Bearing steel wire rods
- Low- and medium-carbon steel rods
- Fasteners and bolts
- Forged or machined steel components
- The vertical pit design minimizes deformation, ensures uniform metallurgical properties, and protects surfaces from oxidation and decarburization.
Pit Type Heat Treatment Furnace Features
Vertical Pit Structure
- Supports heavy and large batches of wire coils or components
- Space-efficient vertical loading
- Crane-assisted operation for safe handling
Durable Industrial Design
- High-grade ceramic fiber insulation
- Reinforced furnace structure for long-term industrial use
- Energy-efficient operation with reduced heat loss
Strong Convection Heating
- Optimized airflow ensures uniform temperature distribution
- Efficient heat transfer improves cycle consistency
Protective Atmosphere
- Optional nitrogen atmosphere reduces oxidation and decarburization
- Provides high-quality surface finish and improved spheroidization rate
| Serial No | Model | Power | Max Load Capacity | Loading Size | External Dimensions | Crane Height |
|---|---|---|---|---|---|---|
| 1 | TE-A-MH-W-180/240 | 200 kW | 8T | φ1800×H2400 | φ3200×H3250 | 5500 mm |
| 2 | TE-A-MH-W-240/240 | 300 kW | 16T | φ2400×H2400 | φ3800×H3250 | 5500 mm |
| 3 | TE-A-MH-W-340/240 | 400 kW | 20T | φ3200×H2400 | φ4800×H3250 | 5500 mm |
| 4 | TE-A-MH-W-360/240 | 500 kW | 24T | φ3600×H2400 | φ5200×H3250 | 5500 mm |
High Surface Quality: Oxidation-free, slight decarburization, excellent spheroidization rate
Uniform Heating: Strong convection ensures even temperature throughout the batch
Large Batch Capacity: Handles multiple coils or components per cycle
Flexible Annealing Processes: Supports spheroidizing, softening, and stress relieving
Long Service Life: Durable insulation and robust construction minimize maintenance

FAQ
1. What types of materials can be processed in this furnace?
The furnace is suitable for medium- and low-carbon steel wire, alloy steel, bearing steel rods, fasteners, and other industrial steel components.
2. Can this furnace perform spheroidizing annealing?
Yes. The pit type furnace is designed to achieve a high spheroidization rate, improving ductility and machinability of steel wire and rods.
3. What is the maximum batch capacity?
Depending on the model, the furnace can handle 8–24 tons per batch. Custom sizes can be configured for larger or smaller loads.
4. What is the protective atmosphere used?
Typically, a nitrogen atmosphere is used to prevent oxidation and decarburization. Optional vacuum or other protective atmospheres can be configured.
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