METHOD OF MANUFACTURE OF ABRASION-RESISTANT SHEET STEEL AND SHEET MANUFACTURED USING THIS METHOD Russian patent published in 2008 - IPC C22C38/54 C22C38/42 C21D8/02 

FIELD: metallurgy.

SUBSTANCE: said utility invention relates to the field of metallurgy, in particular, to a method of manufacture of wear-resistant steel sheets. To enhance the steel sheet wear resistance, it is manufactured of steel containing the following components, % weight: 0.1%≤C≤0.23, 0≤Si≤2, 0≤Al≤2, 0.5≤Si+Al≤2, 0≤Mn≤2.5, 0≤Ni≤5, 0≤Cr≤5, 0≤Mo≤1, 0≤W≤2, 0.05≤Mo+W/2≤1, 0≤B≤0.02, 0≤Ti≤0.67, 0≤Zr≤1.34, 0.05≤Ti+Zr/2≤0.67, 0≤S≤0.15, N≤0.03, if required, 0 to 1.5 of Cu; if required, Nb, Ta, and V with such a content so that Nb/2+Ta/4+V≤0.5; if required, Se, Te, Ca, Bi, and Pb with a content less than or equal to 0.1%; iron and impurities being the remaining. Besides that: 0.095%≤C*=C-Ti/4-Zr/8+7xN/8, Ti+Zr/2-7xN/2>0.05% and 1.05xMn+0.54xNi+0.50xCr+0.3x(Mo+W/2)^1/2+K≥1.8 at K=1 if B≥0.0005% and K=0 if B<0.0005%. After austenitisation, the sheet is cooled at a rate > 0.5°C/s in the range of temperatures Ac₃ and T=800-270xC*-90xMn-37xNi-70xCr-83x(Mo+W/2) and approximately to T-50°C; after that, the sheet is cooled at a rate of 0.1≤Vr≤1150 ×ep^-1.7 in the range of temperatures T-100°C (ep is the sheet thickness in mm); cooled to the ambient air temperature, and levelled if required.

EFFECT: wear-resistance.

7 cl, 1 tbl