A vacuum sintering furnace uses induction heating to perform protective sintering of materials. Types include low-frequency (power-frequency), medium-frequency, and high-frequency induction furnaces. Medium-frequency vacuum induction sintering furnaces are designed for industrial production of hard alloy tools, metal dysprosium, and ceramics.
These furnaces operate under vacuum or hydrogen-protected atmospheres. The tungsten crucible inside the induction coil generates high temperatures, which are transferred to the workpiece via thermal radiation. They are suitable for research and military applications involving refractory alloys like tungsten, molybdenum, and their powders.
The installation site must maintain vacuum-grade cleanliness, dry air, and good ventilation, minimizing dust and contaminants.
Key Knowledge for Operation
- Inspect the control cabinet – Ensure all components and accessories are complete and intact.
- Secure installation – Mount the control cabinet on the designated foundation and fix it properly.
- Electrical connections – Follow wiring diagrams and electrical schematics to connect the main and control circuits. Ensure proper grounding and correct connections.
- Check movable electrical parts – All moving components should operate freely without jamming.
- Insulation resistance – Must be no less than 2 MΩ.
- Valve positions – All valves on the vacuum furnace must be closed.
- Control power switch – Set to the “OFF” position before operation.
- Manual voltage adjustment – Turn the manual voltage adjustment knob counterclockwise.
- Alarm button – Set to the “ON” position.
- Cooling water connections – Connect circulating cooling water according to the layout diagram. It is recommended to include an auxiliary water supply (e.g., tap water) at the main inlet/outlet to prevent seal damage in case of circulation failure or power outage.
Following these points ensures safe operation, protects the furnace, and maintains consistent sintering quality.