Experimental determination of the temperature evolution within the quenchant during immersion quenching in still water
International Journal of Microstructure and Materials Properties
Experimentally, steel quenching processing is studied by inserting thermocouples into a probe or actual part to determine cooling curves. However, this is not always possible. To explore the possibilities and limitations of a technique based on measuring the temperature increase of the quenchant in the vicinity of the cooling metal surface, experimental work with a conical-end cylindrical AISI 304 stainless steel test probe quenched in still water at 60°C, with thermocouples located within the probe and in the quenchant, was conducted. The thermal response in the quenchant was quite sensitive to the proximity of the thermocouple to the surface of the metal as well as to the thermocouple position in the vertical direction. The quenchant volume must also be considered carefully.