METHOD OF DEFORMATION-THERMAL PROCESSING OF HIGH-MANGANESE STEEL Russian patent published in 2018 - IPC C21D8/00 C21D6/00 C22C38/58 

FIELD: metallurgy.

SUBSTANCE: preliminary deformation-thermal processing is carried out, including diffusion annealing of the ingots with the plasticity effect induced by twin formation in the furnace at a temperature of 1150°C for 4 hours, forging at a temperature of 1150°C to the total absolute degree of deformation ε= 1 followed by diffusion annealing in the furnace at a temperature of 1150°C for 4 hours. Further, the forging is hot rolled in a temperature range from 500 to 1150°C in 5 passes with a total absolute degree of deformation ε not less than 1.5, followed by diffusion annealing for 1 hour at a temperature of 1150°C. After that, high-manganese steel with the TWIP effect is subjected to bilateral forging under conditions of warm deformation at a temperature of 400°C to the absolute degree of deformation ε= 3. The invention may be applicable for manufacturing damper elements of seismic resistant structures.

EFFECT: obtaining high damping properties.

4 cl, 2 dwg, 2 ex