Martensitic stainless steel for injection moulds and injection mould frames

摘要

The invention concerns mold or mold frame parts for plastic material injection molding made of quenched and tempered martensitic stainless steel consisting, in wt. %, of: 0.02%=C=0.09%, 0.025%=N=0.12% with 0.05%=C+N=0.17%; Si=0.34% Al=0.080% with Si+23 Al=0.20% and Si+0.6 Al=0.25%; and 0.00025=Al×N=0.0020 0; 0.55%=Mn=1.8%; 11.5%=Cr=16% optionally up to 0.48% of copper, up to 0.90% of the sum Mo+W/2, up to 0.90% of nickel, up to 0.090% of vanadium, up to 0.090% of niobium, up to 0.025% of titanium, optionally up to 0.25 of sulphur, the rest being iron and impurities derived from preparation, the composition further satisfying the condition: 6.5=F═(Cr+Mo)+2(Si+V+Nb)−27(C+N)−(Ni+Mn/2+Cu/3)=13.

主权项

1. Mold component or mold frame component for the injection-molding of plastics materials, which component is composed of quenched and tempered martensitic stainless steel whose composition consists of, in % by weight:
0.02%≦C≦0.09% 0.025%≦N≦0.12% with 0.05%≦C+N≦0.14% Si<0.17% Al≦0.080% with Si+23 Al≧0.20% and Si+0.6 Al≦0.17% and 0.00025≦Al×N≦0.0020 1.056.5≦F═(Cr+Mo)+2(Si+V+Nb)−27(C+N)−(Ni+Mn/2+Cu/3)≦13.