Vacuum firing furnace SNVS-400/7.0

Purpose of the Shaft-Type Vacuum Furnace SNVS-400/7.0

The top-loading vacuum furnace with pneumatic lid opening is designed for annealing copper products at temperatures up to 700 °C in a vacuum of up to 5·10⁻⁴ mmHg (6.67·10⁻² Pa).

Applications and Technology

What is the SNVS-400/7.0 furnace used for: copper vacuum annealing technology

The shaft-type furnace is intended for high-temperature low-vacuum annealing of copper cathodes, busbars, coils, and other rolled products.

The essence of the technology: Heated copper products are placed in a vacuum (~10⁻³...10⁻⁴ mmHg), which allows:

• Complete elimination of surface oxidation. In an oxygen-free environment, copper does not form an oxide film (scale), preserving its original color and high surface purity.
• Performing recrystallization annealing. After cold deformation (drawing, rolling), internal stresses and work hardening occur in copper. Heating to 600-700 °C in a vacuum relieves these stresses, restores ductility and the granular structure of the metal, preparing it for further processing.
• Ensuring high and uniform temperature throughout the entire load volume thanks to three independent control zones.

Main advantages of the technology:

• No scale, eliminating costs for subsequent pickling and cleaning.
• High and stable quality of the annealed metal.
• Ideal surface of the finished product.

Scientific Basis of the Technology

The effectiveness of vacuum annealing of copper for obtaining clean surfaces and controlled microstructure is confirmed by international research. For example, a study published in the Beilstein Journal of Nanotechnology [1] shows that annealing in a high-vacuum environment in the range of 100–300 °C leads to the formation of pure copper nanocrystals and a significant improvement in the electrophysical properties of the material. Our SNVS-400/7.0 furnace provides exactly these conditions — high vacuum and precise temperature control, ensuring reproducibility of results and high annealing quality.

Place an Order or Request a Quote

📞 Call us at 8 800 100 7167 for prompt consultation.

✉️ Request a commercial proposal by email at sales@tula-term.ru, and we will calculate the furnace cost considering your requirements.

🛠 Need a custom configuration? Our engineers will prepare a technical specification for designing a furnace tailored to your tasks.