METHOD OF PRODUCING SHEETS OF HIGH-STRENGTH AUSTENITIC MANGANESE STEELS Russian patent published in 2019 - IPC C21D8/00 C21D6/00 C22C38/58 

FIELD: metallurgy.

SUBSTANCE: to increase strength and plasticity with preservation of permissible values of plasticity index of austenitic steel with manganese content of more than 15 wt. %, aluminium of not less than 1.5 wt. % and having TWIP-effect is subject to preliminary homogenization annealing at temperature 1223–1423 K for 1 h, subsequent hot forging at temperature 1223–1423 K to total true degree of deformation in range 1–1.19, then second homogenization annealing at temperature of 1223–1423 K for at least two hours, subsequent hot rolling without intermediate heating at temperature of 773–1423 K to total true deformation in range of 1.6–1.99, annealing is performed for 1 hour at 1223–1423 K. After annealing, cold deformation is performed by rolling at 293 K to true deformation in range of 0.22–0.4.

EFFECT: said steel can be used in automotive industry for production of car load-carrying structures, as well as in construction, including for production of damping elements used in seismic resistant structures.

1 cl, 4 dwg