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China VKN Pre-Vacuum Nitriding Furnace | High-Quality Suppliers & Factory Equipment for Metal Heat Treatment
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China VKN Pre-Vacuum Nitriding Furnace | High-Quality Suppliers & Factory Equipment for Metal Heat Treatment

The VKN series pre-vacuum gas nitriding furnace represents advanced heat treatment equipment that utilizes both vacuum technology and the gas nitriding process. This innovative furnace ensures a high cleanliness environment, enabling precise control over the quality of the infiltration layer. By integrating nitrogen into the surface of metal materials, it forms a dense compound layer that significantly enhances wear resistance, corrosion resistance, heat resistance, and mechanical strength, This equipment is particularly well-suited for various applications, including gears, shafts, valves, molds, and other critical components, making it an essential tool for pre-oxidation, nitriding, nitrogen carburizing (soft nitriding), as well as for oxidation, tempering, and annealing processes. With its core advantages of high efficiency, precision, and environmental protection, the VKN series furnace is widely utilized across multiple industries, including aerospace, automotive, electric power, petroleum, and industrial manufacturing, As a leading supplier and factory in China, we are committed to providing state-of-the-art nitriding solutions tailored to meet the diverse needs of our clients in various sectors

    Characteristic 01

    Muffle tank + pre-vacuum system double isolation of oxygen and impurities, to ensure the surface finish of the workpiece, to achieve zero oxidation tempering

    Equipped with hydrogen probe and mass flow meter (MFC) to accurately control the proportion of NH₃, N₂, co2 and other gases, combined with nitrogen potential (KN value) closed-loop feedback system, to realize the precise control of the permeation layer thickness and phase structure

    High quality heat-resistant alloy Muffle tank (Inconel 600), can quickly adapt to gas nitriding, nitrogen carburizing (soft nitriding), post-oxidation, tempering and other process switching, theoretical life of more than 8 years

    Built-in high-speed turbine fan and baffle, forced air flow multi-direction circulation, to ensure the same nitriding rate of each part of the processed parts

    Exhaust gas is discharged after treatment by the combustion device, which meets environmental protection requirements; The equipment is also equipped with multiple pressure relief protection (pressure sensor, safety valve, manual pressure relief valve) to ensure safe operation

    Integrated PLC, with program controller or computer interface, touch screen, recorder, real-time monitoring furnace vacuum, temperature, nitrogen potential, pressure, support remote fault diagnosis and process tracing

    The furnace door can be opened vertically, which not only saves space, opens and closes efficiently, but also fits perfectly with the automatic production line, and can be seamlessly integrated into the automatic production process, effectively improving the overall production efficiency

    The equipment provides two types of horizontal type and well type for you to choose flexibly to meet the diversified production needs

    Common specifications 02

    Model number VKN-200 VKN-600 VKN-1000 VKN-1500 VKN-4000
    Effective working area dimension
    Width × height × length (mm)
    400×400×600 600×600×900 760×800×1200 900×900×1200 1200×1000×1500
    Temperature Maximum 750℃ / Normal operating temperature 150~700 ℃
    Cooling pressure 1 bar abs
    Handling weight approx. (Kg) 200 600 1000 1500 4000
    Installed power (KW) 80 120 160 180 240
    ※ Support the furnace effective working area size, shape and other parameters customized according to requirements, to meet the diversified production scenarios

    Frequently Asked Questions FAQ

    What processes can the VKN series gas nitriding furnace perform?
    The VKN series furnace is highly versatile and can quickly switch between gas nitriding, nitrogen carburizing (soft nitriding), post-oxidation, and tempering processes to meet diverse heat treatment requirements.
    How does the pre-vacuum system prevent oxidation during heat treatment?
    The combination of a high-quality Muffle tank and a pre-vacuum system creates a double isolation layer. This effectively removes oxygen and impurities from the chamber before heating, ensuring a bright surface finish and achieving zero-oxidation tempering.
    What is the benefit of the Inconel 600 Muffle tank?
    Inconel 600 is a high-quality, heat-resistant alloy. It provides excellent resistance to high-temperature corrosion and oxidation, allowing the furnace to adapt to rapid process switching with a theoretical service life exceeding 8 years.
    How is the nitriding layer thickness and phase structure controlled?
    The system integrates a hydrogen probe and a Mass Flow Meter (MFC) to precisely regulate the ratio of NH₃, N₂, CO₂, and other gases. Coupled with a closed-loop nitrogen potential (KN value) feedback system, it achieves precise control over the permeation layer's thickness and phase structure.
    Can the furnace dimensions be customized for specific production lines?
    Yes, we support full customization of the furnace's effective working area size, shape, and other parameters to seamlessly integrate with your production lines and satisfy diversified manufacturing scenarios.