1. Open the water inlet valve of the sealed water bucket of the quenching furnace, fill the water bucket with water until the liquid level just overflows, then adjust the water inlet volume, and seal the sealing port at any time to prevent air from entering the furnace.Process Of Preventing Deformation And Cracking Of Mold By Vacuum Heat Treatment 2. Check the height of the liquid level and water seal in the quenching tank so that the liquid level can seal between the furnace and the outside world and prevent air from entering the furnace. 3. Check whether the various gas sources are normal and whether the pipelines are smooth to ensure normal working needs.Heat treatment process for wide and thick plates 4. Check whether the fan cooling water pipe is smooth to ensure the normal operation of the fan. 5. Check whether the power line is normal to ensure normal heating in the furnace.Vacuum sintered powder alloy high speed steel 6. Check whether the transmission and lifting are stuck. 1. First close the gas source valve and flow meter. 2. Turn off other operating equipment in the reverse order of temperature rise. 3. When the furnace temperature drops to 400°C, the "control loop" switch can be closed and the air switch can be disconnected.vacuum-brazing-repair-method-for-cracks
