Vacuum nitriding furnace

Vacuum nitriding furnace working principle:
Vacuum nitriding can be carried out by injecting ammonia gas into the vacuum furnace, which is similar to pulse vacuum carburizing, i.e. the workpiece begins to suction after being loaded into the vacuum furnace. When the vacuum degree reaches a set value, the furnace is heated by electricity and vacuum is pumped at the same time to maintain the vacuum degree of the furnace. When the furnace temperature reaches nitriding temperature, the heat preservation lasts for a period of time. Its function is to purify the workpiece surface and burn through. Thereafter, the vacuum is stopped and the nitriding gas is injected into the furnace, so that the furnace pressure rises to a certain value for a period of time, then the vacuum is pumped and maintained for a period of time, and then the nitriding gas is injected into the furnace. Thus, the nitriding layer is repeated many times until the depth of the nitriding layer reaches the requirements. During the whole process, the furnace temperature remains unchanged.

The steel grades used for vacuum ion nitriding are alloy structural steel, stainless acid-resistant steel, heat-resistant steel, alloy tool steel, high-speed tool steel and nodular cast iron. Common steel grades are 38CrMoAl, 18Cr2Ni4W, 40Cr, 42CrMo, 35CrMo, 45#, 20Cr, 40CrNiMo, etc.

vacuum nitriding furnace advantages:
1. Low temperature and small distortion of workpiece.
2. The process is suitable for many kinds of steel and widely used.
3. The strengthening effect is remarkable, and the wear resistance, corrosion resistance and fatigue resistance are greatly improved after treatment.
4. High efficiency, energy saving and environmental protection, shorter process cycle than general gas nitriding.

Vacuum Nitriding Furnace characteristics:
1. The heating elements are uniformly arranged along the circumference of the heating chamber, and the temperature uniformity is high.
2. High production efficiency and low cost.
3. Cooling uniformity is good and workpiece deformation is small.
4. Fast penetration and high surface hardness.

Technical Parameters: