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OwnerClaudia Ernst, Volker Schuler +2inventors
InventorsClaudia Ernst, Volker Schuler, Bernd Gehricke, Ingolf Schruff
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This invention relates to a nitrogen-alloyed steel with a high wear resistance, which is manufactured via spray compacting and has the following composition (in mass-%): C: 0.8-2.5%, N: 0.03-0.75%, Si: 0.15-1.8%, Mn: ≦1.0%, P: ≦0.03%, S: ≦0.05%, Cr: 4.0-11.5%, Mo: 0.5-6.0%, V: ≦4.0%, Nb: ≦4.0%, W: ≦3.5%, O2: ≦0.005%, other ally constituents as needed, residual iron and usual contaminants as the residue. The chemical composition has been optimized to have the carbide-carbonitride-forming elements satisfy a wear factor Sv, and to maintain the silicon-nitrogen ratio VSiN in order to minimize the residual austenite contents. In addition, the invention relates to a procedure for manufacturing this type of steel and a composite manufactured using steel according to the invention. The steel material according to the invention has an improved wear resistance and dimensional stability.
A nitrogen-alloyed steel with a high wear resistance fabricated via spray compacting and having the following composition (in mass-%):
The steel according to one of the preceding claims, characterized in that it contains up to 0.05 mass-% boron.
The steel according to one of the preceding claims, characterized in that it contains up to 0.5 mass-% titanium.
The steel according to one of the preceding claims, characterized in that it contains up to 0.5% zirconium.
The steel according to one of the preceding claims, characterized in that it contains up to 0.25 mass-% aluminum.
The steel according to one of the preceding claims, characterized in that it contains additional hard materials, such as titanium carbide, silicon carbide, niobium carbide, chromium carbide, titanium nitride, tungsten carbide, in its matrix, which were injected into the spray jet during spray compacting as solid particles.
A procedure for manufacturing a steel according to one of the preceding claims, characterized in that
Dependencies are inferred from the claim text.