Car Bottom Hearth Furnace For Forgings

Loading

● Forgings, ingots, or large steel components are placed on the car bottom using cranes or manipulators.

● Loading is performed outside the furnace, improving safety and reducing furnace downtime.

Furnace Entry

● The car moves along rails into the furnace chamber.

● Furnace doors close to ensure thermal sealing and pressure stability.

Heating Stage

● Burners or electric heating elements raise the furnace temperature according to a predefined heating curve.

● Controlled heating rates prevent thermal stress and cracking in large forgings.

Soaking / Holding

● The forgings are held at target temperature to achieve thermal uniformity throughout the cross-section.

● This stage is critical for large or thick-section components.

Furnace Exit

● After completion of the thermal cycle, the car is withdrawn from the furnace.

● Furnace doors open only briefly, minimizing heat loss.

Unloading / Transfer

● Heated forgings are removed for forging deformation, normalizing, annealing, or quenching preparation.

Structural Characteristics

● Movable car bottom acts as the furnace hearth.

● Large furnace chamber, suitable for oversized and heavy forgings.

● Robust refractory lining designed for high thermal mass.

Operation Mode

● Batch operation, with each charge treated independently.

● High flexibility in heating schedules and workpiece configurations.

Thermal Performance

● Excellent temperature uniformity, especially for large forgings.

● Precise temperature control across multiple heating zones.

● Lower heating rates compared to continuous furnaces, reducing internal stress.

Productivity and Efficiency

● Lower throughput than continuous furnaces.

● Efficient for low-volume, high-value forgings.

● Higher specific energy consumption per ton, but justified by product quality.

Maintenance and Safety

● External loading/unloading reduces operator exposure to heat.

● Easy access to hearth, burners, and refractory for maintenance.