APPARATUS FOR MEASURING RAPID COOLING RATES

摘要

An apparatus has been developed which, in conjunction with a Speedomax recorder, makes it possible to measure very rapid cooling rates. A rotating poteniometer disk is used to produce a varying potential which is applied to the thermocouple of the quenched specimen so that the drop in potential of the thermocouple is compensated for by the voltage from the rotating potentiometer disk. The Speedomax is then re¬quired to measure only the difference between the two changing potentials.