Hot-working material, component and use
Assigneethyssenkrupp AG
InventorsJens-Ulrik Becker, Stefan Myslowicki
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Abstract
The invention relates to a hot-forming material composed of a three-layer composite material, comprising a core layer of a hardenable steel which in the press-hardened state of the hot-forming material has a tensile strength >1900 MPa and/or a hardness >575 HV10. Two outer layers are bonded substance-to-substance with the core layer and composed of a steel which is softer in comparison with the core layer and which in the press-hardened state of the hot-forming material have a tensile strength >750 MPa and/or a hardness >235 HV10. The invention further relates to a component and also to a corresponding use.
Claims18
A hot-forming material composed of a three-layer composite material, comprising a core layer of a hardenable steel which in a press-hardened state of the hot-forming material has at least one of a tensile strength >1900 MPa and a hardness >575 HV10, and two outer layers bonded substance-to-substance with the core layer and composed of a steel which is softer in comparison with the core layer and which in the press-hardened state of the hot-forming material have at least one of a tensile strength >750 MPa and a hardness >235 HV10, wherein the core layer, besides Fe and unavoidable production-related impurities, in wt %, consists of:
- C:
- 0.31-0.6%, Si:
- up to 0.5%, Mn:
- 0.5-2.0%, P:
- up to 0.06%, S:
- up to 0.03%, Al:
- up to 0.2%, Cr+Mo:
- up to 1.2%, Cu:
- up to 0.2%, N:
- up to 0.01%, Nb+Ti:
- up to 0.2%, Ni:
- up to 0.4%, V:
- up to 0.2%, B:
- up to 0.01%, As:
- up to 0.02%, Ca:
- up to 0.01%, Co:
- up to 0.02%, Sn:
- up to 0.05%;
- and
- wherein the outer layers, besides Fe and unavoidable production-related impurities, in wt %, consist of:
- C:
- 0.13-0.3%, Si:
- up to 1.0%, Mn:
- 0.3-3.0%, P:
- up to 0.1%, S:
- up to 0.06%, Al:
- up to 1.0%, Cr+Mo:
- up to 1.5%, Cu:
- up to 0.3%, N:
- up to 0.01%, Ni:
- up to 0.3%, Nb+Ti:
- up to 0.25%, V:
- up to 0.05%, B:
- up to 0.01%, Sn:
- up to 0.05%, Ca:
- up to 0.01%, Co:
- up to 0.02%.
A hot-forming material composed of a three-layer composite material, comprising a core layer of a hardenable steel which in a press-hardened state of the hot-forming material have at least one of a tensile strength >1900 MPa and/or a hardness >575 HV10, and two outer layers bonded substance-to-substance with the core layer and composed of a steel which is softer in comparison with the core layer and which in the press-hardened state of the hot-forming material have at least one of a tensile strength >1200 MPa and a hardness >370 HV10.
A hot-forming material composed of a three-layer composite material, comprising a core layer of a hardenable steel which in a press-hardened state of the hot-forming material has at least one of a tensile strength >1900 MPa and a hardness >575 HV10, and two outer layers bonded substance-to-substance with the core layer and composed of a steel which is softer in comparison with the core layer and which in the press-hardened state of the hot-forming material have at least one of a tensile strength >750 MPa and a hardness >235 HV10;
- wherein the core layer, besides Fe and unavoidable production-related impurities, in wt %, consists of:
- C:
- 0.31-0.6%, Si:
- up to 0.5%, Mn:
- 0.5-2.0%, P:
- up to 0.06%, S:
- up to 0.03%, Al:
- up to 0.2%, Cr+Mo:
- up to 1.2%, Cu:
- up to 0.2%, N:
- up to 0.01%, Nb+Ti:
- up to 0.2%, Ni:
- up to 0.4%, V:
- up to 0.2%, B:
- up to 0.01%, As:
- up to 0.02%, Ca:
- up to 0.01%, Co:
- up to 0.02%, Sn:
- up to 0.05%;
- wherein the outer layers, besides Fe and unavoidable production-related impurities, in wt %, consist of:
- C:
- 0.08-0.3%, Si:
- up to 1.0%, Mn:
- 0.3-3.0%, P:
- up to 0.1%, S:
- up to 0.06%, Al:
- up to 1.0%, Cr+Mo:
- up to 1.5%, Cu:
- up to 0.3%, N:
- up to 0.01%, Ni:
- up to 0.3%, Nb+Ti:
- up to 0.25%, V:
- up to 0.05%, B:
- up to 0.01%, Sn:
- up to 0.05%, Ca:
- up to 0.01%, Co:
- up to 0.02%;
- and
- wherein the ratio of C content of the core layer to the C content of the outer layer is <3.
Dependencies are inferred from the claim text.