| 摘要 |
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 > 0.5C/s in the range of temperatures Ac3 and T=800-270xC*-90xMn-37xNi-70xCr-83x(Mo+W/2) and approximately to T-50C; after that, the sheet is cooled at a rate of 0.1<=Vr<=1150 ep-1.7 in the range of temperatures T-100C (ep is the sheet thickness in mm); cooled to the ambient air temperature, and levelled if required. ^ EFFECT: wear-resistance. ^ 7 cl, 1 tbl |
