Keywords: Pressure, medium, coolingcapacity, gas, liquidmedium, pressure, workpiecesurface, heatremoval, sprayquenching, vacuumheattreatmentfurnace,

The influence of pressure on the cooling capacity of the medium
　　Gas or liquid medium passes through the surface of the workpiece at a higher pressure, and the speed of taking away heat is faster than that under normal pressure, especially in spray quenching When the pressure is greater, the cooling capacity of the medium is stronger. The cooling capacity of the high-pressure nitrogen gas strongly circulating quenching used in the vacuum heat treatment furnace can be increased by more than 3 times compared with that at normal pressure.

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