1. Abnormal Cooling Water in Vacuum Sintering Furnace:
- Confirm that the heating power supply has been stopped.
- If there is water leakage outside the furnace or abnormal cooling water flow, take emergency measures as soon as possible. If water supply can be maintained, continue to maintain the vacuum; if not, keep the furnace in its current state and allow the equipment to cool down.
- If cooling water fails while the equipment is stopped, immediately switch to emergency cooling water.
- At high temperatures, if cooling water stops and emergency supply cannot be provided, the water-cooled electrodes, heat exchangers, vacuum chamber shell, and pumps may be damaged.
2. Compressed Air Stop in Vacuum Sintering Furnace:
- When compressed air abnormality alarms occur while the equipment is stopped, quickly activate the backup compressor room to restore operation.
- If a vacuum process is ongoing and the compressed air alarm persists for a long time, terminate the vacuum and stop the equipment.
3. Sudden Power Outage in Vacuum Sintering Furnace:
- If a power outage occurs during water interruption, immediately connect the backup cooling water supply.
- If the outage occurs when the furnace is not in heating, temperature ramping, or cooling stages, restart the equipment quickly to continue operation; if recovery will take a long time, keep the equipment in its current state.
- If the outage occurs during heating or cooling, restart the equipment if recovery is quick; otherwise, maintain the current state and let the furnace cool naturally.
4. Heating Power Failure in Vacuum Sintering Furnace:
- Low water pressure: an alarm will sound if water pressure drops below 0.15 MPa.
- Grounding faults.
- Vacuum discharge: ensure water-cooled electrode connections and heater terminals are secure, and properly insulated from reflective screens.
- When the furnace pressure is 13.3–66.5 Pa (a vacuum range prone to discharge), power failure may be caused by dielectric breakdown.
5. Gas Supply (Argon or Nitrogen) Stop:
- Before starting vacuum pumping, if gas charging takes too long or cannot be performed, check whether the gas pipelines are blocked.
- If pipelines are fine, check the solenoid valves and gas charging valves. For safety, stop all related equipment before inspection.
- If gas charging cannot be stopped, close all gas supply valves and pipelines when the pressure relief valve operates.
- Check for leaks in the gas supply lines, as leaks may affect product quality.
6. Vacuum Chamber Pressure Deterioration:
- If vacuum pumping takes longer than usual, stop the equipment for inspection. The vacuum chamber structure may cause outgassing, which can raise pressure.
- Confirm whether the pressure rise is due to leakage or outgassing using a pressure rise test or helium leak detection.