METHOD OF DETERMINATION OF PROCESS CHARACTERISTICS EFFECT TO STABILITY OF OVERCOOLED AUSTENITE

FIELD: metallurgy. ^ SUBSTANCE: to determine direction and intensity of process characteristics effect to stability of overcooled austenite of low and medium carbon low alloyed steel for specifying modes of plastic and thermo treatment of items this method includes heating of sample in form of bar with length not less than 50-55 mm and with side length in cross section not less than 7-8 mm up to temperature of austenite formation, then this method includes deformation effecting onto sample, successive volume-end tempering, measurement of hardness along length of sample on two ground diametrically opposite surfaces, curve construction and analysis of hardness distribution after various effecting onto sample. Determination of technological characteristics effect onto stability of overcooled austenite is obtained on base of variations of position of hardness distribution curves. ^ EFFECT: upgraded accuracy of determination of direction and intensity of process characteristics effect on stability of overcooled austenite. ^ 3 dwg