REINFORCED DURABLE TOOL STEEL, METHOD FOR THE PRODUCTION THEREOF, METHOD FOR PRODUCING PARTS MADE OF SAID STEEL, AND PARTS THUS OBTAINED.

摘要

The invention relates to a tool steel, whereby the composition thereof comprises the following expressed in wt. %: 0.8 <= C <= 1.5; 5.0 <= Cr <= 14; 0.2 <= Mn <= 3; Ni <= 5; V <= 1; Nb <= 0.1; Si+Al <= 2; Cu <= 1; S <= 0.3; Ca <= 0.1; Se <= 0.1; Te <= 0.1; 1.0 <= Mo+W/2 <= 4; 0.06 <= Ti+Zr/2 <= 0.15; 0.004 <= N <= 0.02. The rest of the composition is comprised of iron and impurities resulting from the production process, including 2.5.10-4 %2 <= (Ti + Zr/2) x N. The invention also relates to a method for producing parts made of said steel and parts thus obtained.