Pit Type Annealing Heating Treatment Furnace

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Pit Type Annealing Heating Treatment Furnace
Details
The Pit Type Annealing Heating Treatment Furnace is designed for precise thermal processing of steel wire rods, coils, and industrial components. Its vertical pit structure allows heavy batch loads, uniform heat distribution, and efficient atmosphere control, ensuring high-quality annealing for automotive fasteners, aerospace wire rods, bearing steel, and low- to medium-carbon steel.
This furnace is widely used for spheroidizing annealing, softening, stress relieving, and other annealing applications where oxidation prevention and metallurgical consistency are critical.
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Pit Furnace
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Description

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

 

 

 

Advantages of Pit Type annealing Furnaces 

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

 

Pit Type Annealing Furnaces

 

 

 

 

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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