Metal sheet and method for its manufacture

Patent metadata

Field	Value
Publication number	US-10293389-B2
Application number	US-201514963410-A
Country	US
Kind code	B2
Filing date	Dec 9, 2015
Priority date	Dec 11, 2014
Publication date	May 21, 2019
Grant date	May 21, 2019

Abstract

A metal sheet that features a substructure of a first aluminum alloy and at least one reinforcement that is pressed into at least one surface of the substructure, wherein the reinforcement has in at least a direction extending parallel to the surface a large extent in relation to the thickness of the metal sheet and consists of a second aluminum alloy that is harder than the first aluminum alloy.

First claim

What is claimed is:

1. A metal sheet comprising a substructure of a first aluminum alloy and at least one reinforcement that is pressed into at least one surface of the substructure, wherein the reinforcement has a length in at least a direction extending parallel to the at least one surface greater than a thickness of the metal sheet and consists of a second aluminum alloy that is harder than the first aluminum alloy, wherein the reinforcement is covered with a coating and the coating comprises an aluminum alloy foil.

2. The metal sheet according to claim 1 , wherein the reinforcement is selected from the group consisting of a wire, a strip, a netting or a grating.

3. The metal sheet according to claim 2 , wherein the reinforcement comprises a grating having recesses at intersecting points.

4. The metal sheet according to claim 1 , wherein the reinforcement is positively pressed into the substructure.

5. The metal sheet according to claim 1 , wherein the reinforcement comprises a hardened reinforcement affected by a heat treatment.

6. The metal sheet according to claim 1 , wherein the substructure comprises a first area situated adjacent to the pressed-in reinforcement having a first strength and a second area having a second strength, wherein the first strength is greater than the second strength due to strain-hardening of the first area.

7. A metal sheet comprising a substructure of a first aluminum alloy and at least one reinforcement that is pressed into at least one surface of the substructure, wherein the reinforcement has a length in at least a direction extending parallel to the at least one surface greater than a thickness of the metal sheet and consists of a second aluminum alloy that is harder than the first aluminum alloy, wherein the reinforcement is covered with a coating and the coating comprises a stove-enameled paint.

8. A method for manufacturing a metal sheet, comprising:
placing a reinforcement of a second aluminum alloy onto a substructure of a first aluminum alloy, wherein the second aluminum alloy is harder than the first aluminum alloy and the reinforcement has a length in at least a direction extending parallel to a surface of the substructure of the first aluminum alloy greater than a thickness of the metal sheet,
subsequently rolling the reinforcement into the substructure; and
applying a coating at least onto the reinforcement after rolling the reinforcement into the substructure, wherein the coating comprises one of an aluminum alloy foil and a stove-enameled paint.

9. The method for manufacturing a metal sheet according to claim 8 , further comprising:
forming the reinforcement by deep-drawing the metal sheet carried out after the rolling the reinforcement into the substructure.

10. The method for manufacturing a metal sheet according to claim 8 , further comprising:
hardening the reinforcement by forming the metal sheet after rolling the reinforcement into the substructure.

11. The method for manufacturing a metal sheet according to claim 8 , further comprising:
hardening the reinforcement by means heat treating the metal sheet after rolling the reinforcement into the substructure.

Assignees

• Gm Global Tech Operations Llc

Inventors

• Sanders Ronald
• Baumgart Hartmut

Classifications

• B21B3/00 Primary

  Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences {; Rolling of aluminium, copper, zinc or other non-ferrous metals}(altering special metallurgical properties of alloys, other than structure consolidation or mechanical properties resulting therefrom C21D, C22F) · CPC title

• C22F1/04

  of aluminium or alloys based thereon · CPC title

• B21B2003/001

  Aluminium or its alloys · CPC title

• C21D9/48

  deep-drawing sheets · CPC title

• Y10T428/12764

  Next to Al-base component · CPC title