METHOD OF PRESSURE REGIME CARRYING OUT DURING CONVENTIONAL BELL ANNEALING FURNACE'S OPERATION

摘要

The method concerns increasing safety when using a combustible protective atmosphere. The problem is solved in that, prior to the start of annealing and/or prior to the start of cooling, the working pressure of 1 to 5 kPa is increased by 2 to 5 kPa and then reduced to 1 to 2 kPa to a pressure constantly above working pressure and, after ten to thirty minutes from the drop in pressure, this drop in pressure is checked.