Method for making an abrasion resistant steel plate and plate obtained

Abstract

A method for producing a plate of steel which is resistant to abrasion and whose chemical composition includes, by weight: 0.24%≦C<0.35%; 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%; 0.1%≦Mo+W/2≦1%; 0%≦B≦0.02%; 0%≦Ti≦1.1%; 0%≦Zr≦2.2%; 0.35%<Ti+Zr/2≦1.1%; 0%≦S≦0.15%; N<0.03%, optionally up to 1.5% of copper; optionally at least one element selected from Nb, Ta and V at contents such that Nb/2 +Ta/4+V≦0.5%; optionally at least one element selected from among Se, Te, Ca, Bi, Pb at contents which are less than or equal to 0.1%; and the balance being iron and impurities resulting from the production operation. The chemical composition further complying with the following relationships: C*=C−Ti/4−Zr/8+7×N/8≧0.095% and 1.05×Mn+0.54×Ni+0.50×Cr+0.3×(Mo+W/2)+K>1.8 with: K=0.5 if B≧0.0005% and K=0 if B<0.0005%.