Press-hardened component and method for the production of a press-hardened component
View Patent ↗A method for the production of press-hardened components, in particular a vehicle body component, from a semifinished product ( 2 ) made of unhardened, hot-workable steel sheet. A component blank ( 10 ) is formed from the semifinished product ( 2 ), pre-coated with a first coating ( 33 ), by a cold-forming method, in particular a drawing method. The component blank ( 10 ) is trimmed at the margins to a marginal contour ( 12 ′) approximately corresponding to the component ( 1 ) to be produced. The trimmed component blank ( 17 ) is heated and press-hardened in a hot-forming tool ( 23 ); then the press-hardened component blank ( 18 ) is covered with a second, anticorrosion coating ( 34 ) in a coating step.
1. A method for the production of a press-hardened component from a semifinished product made of unhardened, hot-workable steel sheet and precoated with a first coating, comprising the following method steps:
forming a component blank from the semifinished product by cold-forming;
trimming the component blank at a margin to a marginal contour approximately corresponding to the component to be produced;
heating and press-hardening the trimmed component blank in a hot-forming tool; and
covering the press-hardened component blank with a second, anticorrosion coating.
2. The method as recited in claim 1 wherein the press-hardened component is a vehicle body component.
3. The method as recited in claim 1 wherein the cold forming includes drawing.
4. The method as recited in claim 1 wherein the second coating is applied to the press-hardened component blank by a hot galvanizing process.
5. The method as recited in claim 1 wherein the second coating is applied to the press-hardened component blank by a thermal diffusion process.
6. The method as recited in claim 1 wherein the second coating is deposited on both the first coating and uncoated regions of the component blank uncoated by the first coating.
7. The method as recited in claim 1 further comprising freeing the coated component blank coated by the second coating of residues of the covering step after the covering step.
8. The method as recited in claim 1 further comprising tempering the coated component blank after the covering step.
9. A method for the production of a press-hardened component from a semifinished product made of unhardened, hot-workable steel sheet and precoated with a first coating, comprising the following method steps:
heating and press-hardening the semifinished product in a hot-forming tool so as to define a component blank;
trimming the component blank at a margin to a marginal contour corresponding to the component to be produced;
covering the press-hardened component blank with a second, anticorrosion coating.
10. The method as recited in claim 9 wherein the press-hardened component is a vehicle body component.
11. The method as recited in claim 9 wherein the second coating is applied to the press-hardened component blank by a hot galvanizing process.
12. The method as recited in claim 9 wherein the second coating is applied to the press-hardened component blank by a thermal diffusion process.
13. The method as recited in claim 9 wherein the second coating is deposited on both the first coating and uncoated regions of the component blank uncoated by the first coating.
14. The method as recited in claim 9 further comprising freeing the coated component blank coated by the second coating of residues of the covering step after the covering step.
15. The method as recited in claim 9 further comprising tempering the coated component blank after the covering step.
16. A press-hardened component, the press-hardened component being produced by:
providing a semifinished product made of unhardened, hot-workable steel sheet and precoated with a first coating;
forming a component blank from the semifinished product by cold-forming;
trimming the component blank at a margin to a marginal contour approximately corresponding to the component to be produced;
heating and press-hardening the trimmed component blank in a hot-forming tool; and
covering the first coating of the press-hardened component blank directly with a second, anticorrosion coating so as to obtain the press-hardened component.
17. The press-hardened component as recited in claim 16 wherein the first coating includes aluminum and the second, anticorrosion coating includes zinc.
18. A press-hardened component, the press-hardened component being produced by:
providing a semifinished product made of unhardened, hot-workable steel sheet and precoated with a first coating:
heating and press-hardening the semifinished product in a hot-forming tool so as to define a component blank;
trimming the component blank at a margin to a marginal contour corresponding to the component to be produced; and
covering the first coating of the press-hardened component blank directly with a second, anticorrosion coating so as to obtain the press-hardened component.
19. The press-hardened component as recited in claim 18 wherein the first coating includes aluminum and the second, anticorrosion coating includes zinc.
20. A method for the production of a press-hardened component from a semifinished product made of unhardened, hot-workable steel sheet and precoated with a first coating comprising at least one of aluminum, an aluminum alloy and an aluminum-silicon alloy, comprising the following method steps:
forming a component blank from the semifinished product by cold-forming;
trimming the component blank at a margin to a marginal contour approximately corresponding to the component to be produced;
heating and press-hardening the trimmed component blank in a hot-forming tool; and
covering the press-hardened component blank with a second, anticorrosion coating, wherein the covering is performed by at least one of a thermal diffusion with the second, anticorrosion coating comprising at least one of zinc and a zinc alloy, and a hot galvanizing with the second, anticorrosion coating comprising at least one of zinc, a zinc alloy and zinc chloride.
21. A method for the production of a press-hardened component from a semifinished product made of unhardened, hot-workable steel sheet and precoated with a first coating comprising at least one of aluminum, an aluminum alloy and an aluminum-silicon alloy, comprising the following method steps:
heating and press-hardening the semifinished product in a hot-forming tool so as to define a component blank;
trimming the component blank at a margin to a marginal contour corresponding to the component to be produced;
covering the press-hardened component blank with a second, anticorrosion coating, wherein the covering is performed by at least one of a thermal diffusion with the second, anticorrosion coating comprising at least one of zinc and a zinc alloy, and a hot galvanizing with the second, anticorrosion coating comprising at least one of zinc, a zinc alloy and zinc chloride.