Maintenance is especially important for high-temperature sintering furnaces, as it affects both service life and performance. Here are some key maintenance methods:
- Drying New Furnaces or After Refractory Replacement
- Conduct staged heating during the drying process.
- At the beginning, raise the temperature slowly and maintain for a long time, because the furnace is cold and contains high moisture.
- Keep the furnace door open below 400 °C to release water vapor.
- When reaching 700 °C, maintain temperature for a while to ensure uniform heating of the furnace body.
- Regular Cleaning
- Using CO or other carbon-containing gases may decompose hydrocarbons, depositing carbon on furnace walls and heating elements, which contaminates the furnace, erodes refractory materials, and damages electric heating elements.
- Check Heating Elements and Wiring
- Inspect connections to prevent poor contact and sparking.
- Prevent Contamination from Low-Melting Impurities
- Impurities like sulfur, lead, zinc in pressed powders can erode furnace materials and heating elements.
- Regularly clean the furnace, especially the preheating zone.
- Avoid adding sulfur or similar elements during powder metallurgy to protect the furnace.
- Avoid Introducing Oil-Contaminated Boats or Trays
- Oil increases dew point drastically and affects normal operation.
- Leak Testing
- Since low-dew-point operation is required, regularly check bolt-sealed flange connections for leaks.
- Keep Furnace Body Clean
- Periodically remove iron oxide scales, graphite fragments, zinc oxide, and other debris.
- Avoid Long-Term Opening of Furnace Doors at High Temperature
- Prevent air ingress that can damage heating elements.
- Strictly Avoid Over-Temperature Operation
(Content is for reference only. For any issues or emergencies, please contact the manufacturer or service provider.)