Studies on the Kinetics of very Rapid Cooling in Different Quenching Liquids- Application to Some Alloys of Iron, Nickel and Carbon

Abstract

0NE can set the problem of quenching metals and alloys in the following manner. Let us consider a structural transformation arising in the metal or alloy within a certain interval of temperature 01, 02. Let its suppose that this transformation, without induction period, has an initial speed characterized by finite values at all the temperatures within the interval 01, 02, and by negligible value, at the boundaries 01 and 02 of this interval. This speed of transformation can be measured for all the temperatures within the interval 01, O2 by recording, against time, the variations of a physical property of the sample in direct relation with its structure.With the well-known isothermal thermodilatometer of Prof. Cheve-narci, this physical property is the length of a cylin-drical wire of some millimetres in diameter and 50 millimetres in length.