PRODUCTION OF STEEL SHEETS OF HIGHER WEAR RESISTANCE Russian patent published in 2017 - IPC C21D8/02 C22C38/54 

FIELD: metallurgy.

SUBSTANCE: producing the slabs of steel containing, wt %: 0.17-0.28 C, 0.10-0.30 Si, 0.75-1.50 Mn, 0.60-1.20 Cr, 0.60 -1.20 Ni, 0.20 -0.40 Mo, 0.04-0.10 V, 0.02-0.08 Al, 0.001-0.010 N, 0.01 -0.10 Cu, 0.001-0.020 Nb, 0.002-0.040 Ti, 0.001-0.005 B, no more than 0.010 S, no more 0.015 P, the rest is Fe. Slabs are heated in the temperature range 1180-1250°C, the finish temperature of the finishing rolling is set no higher than 960°C, hardening, including rolling heat, is carried out at a temperature of 920-970°C. To relieve internal stresses after tempering with a temperature vacation 150-250°C.

EFFECT: providing high hardness and strength while maintaining sufficient ductility and toughness.

2 cl, 4 tbl