Rationalization of Heat Treatment Parameters of Steel 70Kh3G2VTB on the Basis of a Study of Phase Composition

Peculiarities of Thermal Hardening of Experimental Sparingly-Alloy Tool-Class Steels

“…We have investigated the behavior of the carbide phase in various stages of thermal hardening, studied the mechanism of precipitation hardening steels experienced during tempering [2]. A set of mechanical tests was conducted, performance characteristics of the new steels [3] was and the kinetics of phase transformations during continuous cooling from the austenitic field, allowing to optimize the heat treatment regimes [1] and to improve the reliability and durability of the finished tool with a minimal cost to produce it were studied.…”

“…The study of the kinetics of phase transformations in advanced steels [2], allowed to recommend optimal parameters quenching austenitizing in the temperature range 900 -1000 °C, which contributes to the formation of the structure of the packet and lath martensite, provides the hardness of hardened steels within the 63 -65 HRC for 70H3G2VTB and 70H3G2FTR and 56 -58 HRC for steel 100H3G2MTR that is associated with an increase in the structure amount of the retained austenite up to 15-20%.…”