C - Chemistry – Metallurgy – 22 – C
Patent
C - Chemistry, Metallurgy
22
C
C22C 38/24 (2006.01) C21D 6/00 (2006.01) C22C 38/22 (2006.01) C21D 1/18 (2006.01) C21D 9/00 (2006.01)
Patent
CA 2488790
The invention concerns a steel, particularly a steel for mould tools for plastic moulding, having the following chemical composition in weight-%:0.43 - 0.60 Cfrom traces to 1.5 Sifrom traces to 1.5 (Si+Al)0.1-2.0 Mn3.0-7.0 Cr 1.5- 4.0 (Mo+ ), however max. 1.0 W0.30-0.70 Vmax. 0.1 of each of Nb, Ti and Zr max. 2.0 Comax. 2.0 Nibalance essentially only iron and unavoidable impurities. After hardening and high temperature tempering at 520-560~C, the steel has a hardness of 56-58 HRC.
L'invention concerne de l'acier, particulièrement de l'acier pour outils de moulage servant à mouler des pièces en plastique, dont la formule chimique en pourcentage massique est la suivante : 0, 43 0,60 C ; une teneur en Si comprise entre des traces et 1,5 ; une teneur en (Si + Al) comprise entre des traces et 1,5 ; 0,1-2,0 Mn ; 3,0-7,0 Cr ; 1,5-4,0 (Mo+W/2), max. 1,0 W ; 0,30-0,70 V ; max. 0,1 Nb, Ti et Zr ; max. 2,0 Co ; max. 2,0 Ni ; le reste étant essentiellement constitué de fer et d'impuretés inévitables. Après durcissement et trempe à des températures élevées comprises entre 520 et 560·C, la dureté de l'acier se situe entre 56 et 58 HRC.
Ridout & Maybee Llp
Uddeholm Tooling Aktiebolag
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