Deep Well Type Ion Nitriding Furnace

The deep well type ion nitriding furnace is a device used for the surface nitriding treatment of metal materials.

• Furnace Body Structure: Typically adopts a cylindrical deep well structure, consisting of a furnace cover, furnace cylinder, furnace bottom plate, and base frame. The interlayers of the furnace cover, furnace cylinder, and furnace bottom plate are filled with cooling water to reduce the furnace body temperature and protect the furnace structure.
• Heating System: Generally, heating elements (such as resistance bands) are installed on the inner wall of the furnace lining. Heat is generated by the heating elements to provide the required nitriding temperature inside the furnace.
• Vacuum System: Composed of a vacuum pump, pipelines, valves, vacuum gauge, etc., it can evacuate the furnace to the required vacuum degree, creating a good vacuum environment for ion nitriding. The ultimate vacuum degree can usually reach the level of 10⁻¹Pa ~ 10⁻³Pa.
• Gas Supply System: Equipped with gas supply pipelines and flowmeters, it can accurately control the flow rate and pressure of nitrogen-containing gases (such as nitrogen, ammonia gas) injected into the furnace to meet the requirements of different nitriding processes.
• Temperature Measurement and Control System: Temperature measuring elements (such as thermocouples) are inserted into the furnace for temperature measurement, and the temperature signal is fed back to the temperature control instrument to achieve precise control of the internal furnace temperature. The temperature control accuracy can reach ±1℃ ~ ±5℃.

• In a vacuum environment, nitrogen-containing gases (such as nitrogen, ammonia gas) are filled into the furnace. The power supply of the equipment applies an electric field between the anode and cathode, ionizing the nitrogen-containing gases to generate charged particles such as nitrogen ions and electrons, forming plasma. Nitrogen ions are accelerated under the action of the electric field and bombard the surface of the metal workpiece at high speed. The kinetic energy of the ions is converted into heat energy to heat the workpiece. At the same time, nitrogen ions gain electrons on the workpiece surface and are reduced to nitrogen atoms. The nitrogen atoms penetrate the metal surface, diffuse inward, and undergo chemical reactions with metal atoms, forming a nitriding layer on the metal surface.

• Furnace Chamber Size: According to different production requirements, the furnace chamber diameter can range from 500mm to 2000mm, and the furnace chamber depth can range from 1000mm to 5000mm, to meet the nitriding treatment of workpieces with different sizes and shapes.
• Temperature Range: The commonly used working temperature is generally 500℃ ~ 650℃, and the maximum working temperature can reach about 700℃, which can meet the ion nitriding temperature requirements of most metal materials.
• Power Supply Parameters: The output voltage is generally continuously adjustable from 0V to 1000V. The output current varies according to different equipment models, with common values of 50A, 100A, 150A, etc. The frequency is usually below 100Hz.
• Vacuum Degree: The ultimate vacuum degree can usually reach 10⁻¹Pa ~ 10⁻³Pa, and the pressure rise rate is ≤0.67Pa/h to ensure the stability of the vacuum environment inside the furnace.

• Good Temperature Uniformity: Through reasonable arrangement of heating elements and installation of air guiding devices, the temperature inside the furnace can be evenly distributed, effectively avoiding local overheating and ensuring the consistency of workpiece nitriding quality.
• High Nitriding Efficiency: During the ion nitriding process, nitrogen ions directly bombard the workpiece surface, accelerating the penetration and diffusion of nitrogen atoms. Compared with the traditional gas nitriding method, the nitriding speed is faster, which can greatly shorten the nitriding time and improve production efficiency.
• Good Treatment Effect: It can form a nitriding layer with high hardness, good wear resistance, and strong corrosion resistance on the metal surface, significantly improving the surface performance of metal parts and extending their service life.
• Wide Application Range: Suitable for the nitriding treatment of metal workpieces such as carbon steel, alloy steel, stainless steel, mold steel, and titanium alloy with various shapes and sizes, especially for long-axis parts with relatively regular shapes such as shafts, gears, and molds.