Introduce ammonia into the Nitriding Furnace inner Stainless Steel Vacuum Seal tank, heat to 520°C, keep it for an appropriate time, which varies from 3-90 Hour according to the workpiece material and Case layer requirement, so that the Nitriding workpiece surface obtains a nitrogen-containing strengthening layer, getting high Hardness , high Wear Resistance , high Fatigue Limit and good Wear Resistance .
Operation method:
1. The mold before Nitriding must be a work piece that has previously undergone Normalizing or quenching and tempering treatment.
2. First, use gasoline and alcohol to scrub the surface of the workpiece. There must be no rust spots, oil stains or dirt present.
3. After loading into the furnace, symmetrically tighten the Furnace Lid compression bolts.
4. Pass cooling water into the furnace tank and Furnace Lid water inlet for circulating water cooling. On Furnace Lid , the lower end of the outer water jacket of the upper pipeline is the water inlet, and the upper end is the water outlet. The furnace tank has independent water inlet and independent water drainage. All water pipes of Furnace Lid can be connected in series according to the principle of low inlet and high outlet, with water entering from one port and draining from one port.
5. Liter Before heating, nitrogen should be introduced first for exhaust gas discharge, and the flow rate during exhaust should be more than twice that during use.
After 10 Minute exhausts, set the temperature control instrument to 150°C, flip Automatic the heating switch to on, heat while exhausting, maintain 150°C for 2h to exhaust, then set the temperature control instrument to 530°C, adjust the ammonia flow rate to be smaller, keep positive pressure inside the furnace, the exhaust port has a small upward air flow pressure, when the furnace temperature Liter reaches 530°C, perform constant temperature and constant flow Nitriding for 3-20h, then adjust the ammonia pressure to be larger, let the exhaust maintain a moderate pressure, Nitriding for 4-70h, then adjust the ammonia pressure to be smaller, perform denitrification for 1-2h, cut off the power supply, stop heating, supply a small amount of ammonia to keep positive pressure inside the furnace, stop ammonia supply and take out the product from the furnace only after the furnace temperature drops below 150°C.
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