Bell furnace SGV-730/0.6-I2

Purpose of the Bell-Type Vacuum Furnace SGV-730/0.6-I2

The equipment is designed for vacuum heat treatment (annealing) in a protective atmosphere (or under vacuum) of coils (bundles) of non-ferrous metal strip (e.g., copper, brass, aluminum).

Technological processes for which the furnace is used:

• Bright annealing — heating metal without air access to relieve stresses, soften, or recrystallize without scale formation.

Processing is carried out in a rarefied atmosphere (residual pressure 200–300 mm Hg), which prevents contact with oxygen and ensures a bright surface without scale.

• Vacuum heat treatment* — removal of gases and contaminants from the strip surface.
• Drying or degassing of coils before further processing.

*Residual pressure in the working chamber — no more than 200 mm Hg (operating range 200–300 mm Hg depending on seal condition and water temperature).

Why in coil form

• Space saving and productivity.
• Prevention of sticking.
• Uniform heating and cooling.
• Geometry preservation.

Typical process:

• Rolling → coiling into a bundle.
• The bundle is placed on a bogie with a muffle.
• The bogie is rolled under the bell, thermocouple and vacuum system are connected.
• Vacuum annealing is performed.
• Upon cycle completion, the bell is lifted, the bogie is rolled out.
• The bundle cools on the bogie (thermocouple remains in the muffle to monitor cooling temperature).
• The next bogie with a workpiece moves into the vacated position.

*The description is given as an example and may differ from your practice.

Video of furnace operation.

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