Keywords: Nitriding Furnace, Nitriding, Operation Procedure, Vacuum Pump, Furnace Charging, Ammonia, Cooling, Vacuum, Heat Treatment, Industrial Furnace, Electric Furnace, Industrial Electric Furnace, Gas Nitriding,

Nitriding Furnace Operation Procedure

I. Nitriding furnace loading requirements

1、Before loading the furnace, the dust and impurities in the furnace must be cleaned up.

2、Workpiece must be loaded from the bottom to the top of the order of the furnace (to prevent the workpiece falling danger)

3、the short end of the workpiece is placed in the round pads and then pushed into the working disk, there are small holes in the face inward

4、The position of the workpiece is the same as the previous loading position (about 200pcs/furnace).

5、After the workpiece is loaded into the furnace, the white sealing ring must be cleaned with alcohol.

6、Use the traveling crane to lift the furnace canister carefully, reach the safe height, move to the furnace body directly above, to be stable and then slowly down, the loading of the furnace is complete.

Second, the nitriding furnace must be checked before turning on the power supply.

1、Furnace cooling water circulation must be opened (the valve in the horizontal state is open, vertical state is closed).

2、Vacuum pump butterfly valve must be closed.

3、Ammonia tank and carbon dioxide tank should be closed.

4, anode quick connector to be connected to the furnace body (and water cooling pipe together with the green line connector)

5、Black pulse control panel “voltage” knob, “duty cycle” knob should be rotated to the left of the smallest value

6, yellow ammonia reversing valve handle in the center (up) position

Third, the nitriding furnace power running steps

1、Open the general control power of nitriding furnace

2、Electrical cabinet control panel “manual/automatic” knob, hit the automatic

3, enter the control system touch screen, click “(a) playing arc parameter setting”, select the number of open insulation segment 09, finished exit

4, click “(B) temperature insulation parameter settings”, check whether the parameters are correct, 9 insulation time of 300min, click on the “pressure preservation parameter settings”, 5 to reach the pressure 350Pa

5, into the system operation, select the confirmation of the furnace, No. 1 furnace (left), No. 2 furnace (right), if the furnace is not to work furnace, click on the “furnace switch”, (furnace work process must not press the furnace switch button)

6, vacuum: the upper-left corner of the system start button from red to green, vacuum pump 1 (3), 2 (4) button becomes green, check whether the two vacuum pumps are running, such as not running, open the lower right door of the electronic control cabinet, check whether the trip, to confirm that the two vacuum pumps have been started after the work, open the butterfly valve of the vacuum pump (before it must be closed or the vacuum pump in the oil will be pressed by the air pressure into the furnace), start vacuuming, when the pressure reaches 100Pa or so, click on “furnace switch”, (furnace work process must not press the furnace switching button). When the pressure reaches 100Pa or so, close the 1 (3) vacuum pump butterfly valve, when the pressure reaches 60Pa or so, the vacuum pump 1 (3) automatically shut down (green light off), high pressure button is automatically turned on!

7, black pulse control panel, the voltage knob to the left automatic knob, duty cycle knob to the right automatic (automatic when the temperature rise time is long, according to the actual situation can be adjusted to manual control), the voltage knob, duty cycle knob rotated to the right position (peak current = 100 ~ 200, current A ≤ 150), the furnace began to work safely, the workpiece in the tank began to play the arc

8, extinguish the arc to send ammonia furnace temperature to 90 degrees, the furnace canister after the stabilization of the glow (not flash arc), open the ammonia tank, the yellow reversing valve to the left side of the No. 1 furnace (the right side of the No. 2 furnace), ammonia flow rate does not need to be adjusted, the controller will be based on the pressure of the furnace will be automatically adjusted

9, plus send carbon dioxide gas about 9 ~ 10 hours after the temperature rise to 500 ℃ when the duty cycle knob to the automatic state, and then continue to raise the temperature to 510 ℃ to the insulation state, open the carbon dioxide gas valve, set the screen 2 kinds of gas flow rate (ratio of about 7%)

10, the beginning of insulation, insulation 5 hours to the end (the time has been set, the end of the people to watch), the

11, close the ammonia tank (off the main valve, the blue valve does not move), close the carbon dioxide tank, close the vacuum pump butterfly valve, rotate the black pulse power supply box, the voltage, duty cycle knob rotated to the minimum (that is, the leftmost), at this time through the nitrogen, so that the pressure in the tank to reach 20Kpa (the purpose of the shortening of the cooling time), turn off the general control power supply

12、After 6~8 hours of cooling in the nitriding furnace

13、Observe the cooling temperature in the furnace, turn on the general control power supply, watch the temperature in the furnace in the upper left corner, when the temperature is lower than 150 ℃ can be out of the furnace.

14, out of the preparation: lift the vacuum in the furnace to open the air inlet valve between the two butterfly valves (directly pull out), no ringing sound, pull down the anode quick connector (and water cooling pipe together with the green line connector)

15, crane lifting bell: crane hook moved to the ring, aligned with the center of the ring free suspension, the hook up and down, left and right are not touching the ring, indicating that it can be lifted vertically and smoothly.

16、Cooling in air to room temperature (not hot)

17、Unloading:according to the variety, the workshop is placed on the shelf, the operation is completed.

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