RHN vacuum nitriding furnace

RHN vacuum nitriding furnace equipment working principle

RHN vacuum nitriding furnace equipment is the main ability to deal with nitriding, can deal with low temperature objects and workpieces in a certain period of time, the operation time is relatively short, the workpiece can be deformed smaller characteristics, has a certain wear resistance.

Specific RHN vacuum nitriding furnace operation method:

1. The mold or workpiece before the use of RHN vacuum nitriding furnace must be the workpiece that has been normalized or tempered first

2. You can scrub the surface of the workpiece with gasoline and alcohol first, and there must be no rust, oil, and dirty things on it.

3. After loading into the RHN vacuum nitriding furnace, the lid pressing bolt can be tightened on the scale.

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 RHN vacuum nitriding furnace cover is water inlet, and the upper end is water outlet. The furnace tank is separately water inlet and drainage. All the water pipes under 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.

RHN vacuum nitriding furnace operating temperature: mainly hard nitriding operating temperature is generally between 480 ° C and 550 ° C, the common temperature is 490 ° C to 530 ° C

Working principle of RHN vacuum nitriding furnace: NH3=N+3/2H2, where N is active nitrogen, plays the role of nitriding. Attention of RHN vacuum nitrification furnace: The survival cycle of active nitrogen is very short, if it is not adsorbed by the workpiece, it will quickly combine to form nitrogen and lose activity. Nitrogen does not have any nitriding capacity

RHN vacuum nitriding furnace internal atmosphere composition: NH3, N2, H2

Definition of nitrogen potential: KN=PNH3/(PH2)1.5=[1- (4/3) PH2]/ (PH2)1.5