The cooling operation can be controlled
by changing the
quenching time and cooling media condition during quenching
operations with water and air–water mixture [9]. Karaca [10]
investigated cooling media mixed water and pressurized air at a
pressure lower than 65 mmWC (millimeter water column) in his
research on the hardenability of steel. He saw that the hardenability
depth formed was at a higher level than those formed under
65 mmWC and 130 mmWC pressures