Steel for shaping tools
AssigneeThyssen France SA
InventorsJacques Adrien, Remi Bertrand
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Abstract
A steel obtained via the metallurgy of a high purity pre-alloyed, agglomerated and densified powder, the steel has the following weight composition: Manganese <1%, silicon <1%, chromium 4.50-6.45%, molybdenum 4-6%, vanadium 6.10-6.5%, tungsten 18.20-18.70%, sulfur <0.0020%, phosphorus .ltoreq.0.030%, oxygen .ltoreq.100 ppm, cobalt 5-7%, nitrogen 0.050-0.080%, .ltoreq.aluminum 0.020%, carbon 1.80-1.95%, balance iron and the impurities which are characteristic of producing steel. The steel has for the most part a dispersion of vanadium MC type carbides.
Claims2
A powder-metallurgy formed from a high-purity agglomerated densified pre-alloyed powder and having the following weight composition:
- ______________________________________ Manganese <1% Silicon <1% Chromium 4.50- 6.45% Molybdenum 4- 6% Vanadium 6.10- 6.5% Tungsten 18.20- 18.70% Sulfur .ltoreq. 0.0020% Phosphorus .ltoreq.0.030% Oxygen .ltoreq.100 ppm Cobalt 5- 7% Nitrogen 0.050- 0.080% Aluminum .ltoreq.0.020% Carbon 1.83- 1.90% Balance iron and usual steel-making impurities. ______________________________________
Dependencies are inferred from the claim text.