Reinforced durable tool steel, method for the production...

C - Chemistry – Metallurgy – 22 – C

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C22C 38/18 (2006.01) B22D 7/02 (2006.01) C22C 38/04 (2006.01) C22C 38/22 (2006.01) C22C 38/24 (2006.01) C22C 38/28 (2006.01) C22C 38/38 (2006.01) C22C 38/50 (2006.01)

Patent

CA 2444175

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.

L'invention concerne un acier à outils dont la composition comprend, les pourcentages étant exprimés en % en poids: 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 le reste de la composition étant constitué de fer et d'impuretés résultant de l'élaboration, étant en outre entendu que: 2,5.10-4 %2 <= (Ti + Zr/2) x N, un procédé de fabrication de pièces dans cet atelier et les pièces obtenues.

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