Understand the operation steps of sintering gas in a vacuum tube furnace in 3 minutes

Operation steps for sintering gas in vacuum tube furnace:

1. The first thing to pay attention to is to close the working gas path and connect the gas outlet end of the tube furnace to the vacuum pump

2. Turn on the power of the vacuum pump, open the exhaust valve, and evacuate the tube body and gas pipeline.

3. When the vacuum gauge of the tube furnace reaches -0.1 (when the pointer reaches the end), close the inlet valve. If the vacuum gauge of the tube furnace remains at -0.1 even after standing still for one hour, it indicates that the sealing of the tube furnace is good. Otherwise, the leakage point should be identified and corrected. Inert gas pressurization can also be used to test airtightness, with a pressure generally not exceeding 0.05Mpa.

4. Rotate the knob to open the main valve of the gas cylinder, slowly open the outlet pressure reducing valve, and keep the outlet pressure within a reasonable range. (The applicable range is indicated on the pressure gauge)

5. Slowly open the inlet valve of the tube furnace; At the same time, pay attention to the pressure gauge of the tube furnace and confirm that the pressure is below 0.05MPa (if the pressure is higher than 0.05MPa, use the tube furnace exhaust valve to release the gas).

When the pressure of the tube furnace is stable, close the inlet valve of the tube furnace, open the outlet valve, evacuate to -0.1, and close the outlet valve of the tube furnace.

After repeating the extraction three times, close the inlet and outlet valves, and connect the outlet hole to the conical bottle.

8. Open the inlet valve of the tube furnace and blow out the air valve, so that the speed of bubbles appearing in the conical flask is 2/s. The discharged gas should be discharged outdoors or into the exhaust cabinet.

9. Heat up after ten minutes of ventilation