Decomposition of supercooled austenite of powder phosphorus steels

The structure of powder phosphorus steels is investigated. New models of is othermal decomposition of supercooled austenite are suggested which make it possible to predict the kinetics of the gamma --> alpha transformation in the pearlite and bainite temperature ranges. It is shown that mechanical al loying has a favorable effect on the formation of structure in steels. Grai n disintegration accelerates the decomposition of austenite mainly due to t he growth of the specific surface. Ar the same time,: the contribution of 0 .65 - 1.1% phosphorus additives to the process is low.