What processes can be used for carbon tube vacuum furnace?
11-25-2025 Author: KJ technology
The process that can be achieved by a carbon tube vacuum furnace is as follows:
1. Sintering process
Ceramic material sintering: used for densification treatment of ceramic materials such as alumina, silicon nitride, and silicon carbide. By removing pores and impurities from the blank in a vacuum environment, the density is increased and the bending strength is improved. For example, after vacuum sintering at 1600 ℃, alumina ceramics can meet the strength requirements of high-speed cutting tools.
Metal material sintering: supports the sintering of metal materials such as hard alloys and powder metallurgy. Carbon tube heating element provides a uniform thermal field, ensuring uniform diffusion of material particles and reducing the risk of cracking, making it suitable for manufacturing high-performance metal components.
Composite material sintering: used for high-temperature treatment of carbon/carbon composite materials, ceramic based composite materials, etc. By precisely controlling the temperature gradient, optimizing the internal structure of the material, and improving heat resistance and mechanical properties.
2. Heat treatment process
Annealing treatment: High temperature annealing is performed on tool and die steel, high-temperature alloys, etc. to eliminate internal stress, improve organizational structure, and enhance material toughness. Vacuum environment prevents oxidation and maintains surface smoothness.
Quenching treatment: supports vacuum quenching of materials such as high-speed steel and alloy structural steel, obtaining high hardness martensitic structure through rapid cooling, while reducing deformation and cracking, and improving the fatigue strength of parts.
Tempering treatment: used for tempering high-temperature alloys and elastic alloys, adjusting the balance between material hardness and toughness, and meeting the stringent requirements for material properties in aerospace, precision machinery and other fields.
3. Chemical heat treatment
Vacuum carburizing: carburizing treatment is carried out on parts such as gears and bearings in a vacuum environment to form a uniform carbon concentration gradient. The depth deviation of the carburizing layer is controlled within ± 5%, and the surface hardness is higher, significantly improving wear resistance.
Carbon nitrogen co diffusion: By introducing nitrogen-containing gas, the synergistic diffusion of carbon and nitrogen is achieved, forming a composite infiltration layer, further improving the surface hardness, fatigue resistance, and corrosion resistance of the material.
Pulse gas supply carburizing: using a periodic gas supply method, precise control of carbon potential fluctuations, reducing carbon black deposition, suitable for deep carburizing (and processing of complex geometric workpieces, shortening processing time).
4. Purification and synthesis process
Rare earth element purification: Using a vacuum environment to reduce the volatilization temperature of impurities, efficiently separate rare earth elements, improve purity, and meet the needs of fields such as semiconductors and optical materials.
Nanomaterial synthesis: Carbon nanotubes are synthesized by catalytic cracking of methane in an argon atmosphere at 800-1200 ℃. The diameter distribution can be precisely controlled by temperature and gas ratio, resulting in higher purity and suitability for fields such as batteries and catalysts.
Semiconductor doping: Introducing gaseous compounds of phosphorus or boron at 1000 ℃ to precisely dope silicon wafers, controlling the doping concentration and depth, forming PN junctions that meet the requirements, and improving the performance of semiconductor devices.
5. Other special processes
Vacuum brazing: brazing metal components in a vacuum environment to avoid oxidation and porosity defects, improve joint strength and sealing, widely used in aerospace, electronic packaging and other fields.
Vacuum coating: By using chemical vapor deposition (CVD) technology, a thin film is deposited on the surface of materials to improve wear resistance, corrosion resistance, or optical properties, such as tool coatings, optical lens coatings, etc.
