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US 10,472,705 B2Granted
Cold work tool steel
AssigneeUddeholms AB
InventorsPetter Damm, Thomas Hillskog, Kjell Bengtsson, Annika Engström Svensson, Sebastian Ejnermark, Lars Ekman, Victoria Bergqvist
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Abstract
The invention relates to a cold work tool steel. The steel comprises the following main components (in wt. %): C 0.5-2, N 1.3-3, Si 0.05-1.2, Mn 0.05-1, Cr 2.5-5.5, Mo 0.8-2.2, V 6-18, with a balance of optional elements, iron, and impurities.
Claims12
A steel for cold working, consisting of, in weight %:
- C 0.5-2.1
- N 1.3-3.5
- Si 0.05-1.2
- Mn 0.05-1.5
- Cr 2.5-5.5
- Mo 0.8-2.0
- V 6-18
- W ≤0.40
- optionally one or more of
- P ≤0.05
- S ≤0.5
- Cu ≤3
- Co ≤12
- Ni ≤3
- Nb ≤2
- Ti ≤0.1
- Zr ≤0.1
- Ta ≤0.1
- B ≤0.6
- Be ≤0.2
- Bi ≤0.2
- Se ≤0.3
- Ca 0.0003-0.009
- Mg ≤0.01
- REM ≤0.2
- balance Fe apart from impurities, and
- wherein the steel has a microstructure including carbides and carbonitrides, in volume %, such that M6X≤3, M is a metal, and X is one or more of C, N, and B.
24 more elements
Dependencies are inferred from the claim text.