Nitriding furnace control cabinet

Nitriding furnace nitriding process

Pass ammonia gas into the stainless steel vacuum sealed tank in the nitriding furnace, heat to 520℃, maintain the appropriate time,

According to the workpiece material and infiltration layer requirements of 3-90 hours, so that nitriding workpiece surface to obtain a nitrogenous strengthening layer, high hardness, high wear resistance, high fatigue limit and good wear resistance.

Nitriding furnace operation method:

1. The mold before nitriding must be a workpiece that has been normalized or tempered first.

2. Scrub the surface of the workpiece with gasoline and alcohol first, and there shall be no rust, oil and dirt.

3. After loading into the furnace, tighten the furnace cover compression bolt symmetrically.

4. The water inlet of the furnace tank and the furnace cover is passed into the cooling water for circulating water cooling. The lower end of the cooling water in the pipe on the furnace cover is the water inlet, and the upper end is the water outlet. The furnace pot is separately fed into and drained separately. All the water pipes on the furnace cover can be connected in series according to the principle of low inlet and high inlet.

5. Nitrogen exhaust should be sent before heating up, and the flow rate of exhaust should be more than twice that of use.

After 10 minutes of venting, set the temperature controller (as shown below) to 150℃, turn the automatic heating switch on, heat 150℃ while venting to maintain 2h exhaust, and then set the temperature controller to 530℃, reduce the ammonia flow rate, maintain the positive pressure in the furnace, and have a small upward pressure of air flow at the exhaust port. When the furnace temperature rises to 530℃, constant temperature and constant flow nitriding for 3-20h. Then increase the ammonia pressure, so that the exhaust gas to maintain moderate pressure, 4-70h nitriding, and then reduce the ammonia pressure, denitrification 1-2h, cut off the power supply, stop heating, give a small amount of ammonia, so that the furnace to maintain positive pressure, until the furnace temperature drops below 150℃ to stop the ammonia oven.