Structure formation in steel 20 at the macro, meso, and nano levels in diffusional austenite decomposition after controllable thermoplastic hardening

Effect of Thermomechanical Treatment on the Properties of Steel with a Mixed Martensitic-Bainitic Structure

“…They were heated to 910 °C, exposed at this temperature for 20 minutes and deformed on the SCAMEX hydraulic press with an extent of 40%. This degree of deformation is most efficient and ensures the formation of an equiaxed austenite microstructure with high resistance to static recrystallization [5]. After that the samples were rapidly cooled in a salt melt heated to a temperature of 270 °C.…”

“…High rates of structural strength of steel can be achieved by technological processes combining operations of hot plastic deformation and thermal hardening. Various types of high-disperse structures having high resistance to degradation under dynamic and cyclic loads may be formed by thermomechanical treatment of steel [3,4,5,6,7]. Another promising trend to increase characteristics of structural strength is to make a mixed structure consisting of two or more components, some of which provide high strength, while the other improves crack propagation resistance of steel [8,9].…”