Automobile body part
AssigneeNovelis Inc.
InventorsCorrado Bassi, Juergen Timm
Life of this patent
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Abstract
In a car body or component thereof with at least one first component of sheet metal of a first aluminum alloy and at least one second component of sheet metal of a second aluminum alloy, the first and second aluminum alloys are of type AlMgSi and in the sheet metal of the second aluminum alloy a substantial part of the elements Mg and Si, which are required to achieve artificial ageing in solid solution, is present in the form of separate Mg2Si and/or Si particles in order to avoid artificial ageing. By reduction of the hardening capacity of the second component during artificial ageing of the body as part of the paint baking cycle, the car body has an improved impact protection for pedestrians in comparison with solutions according to the prior art.
Claims20
A sheet metal AlMgSi type aluminum alloy automobile body part, wherein a substantial part of the elements Mg and Si in the sheet metal, which are required to achieve artificial ageing in solid solution, are present as separate Mg2Si and/or Si particles to avoid artificial ageing.
An automobile body or component thereof comprising at least a first sheet metal component of a first aluminum alloy (A) and at least a second sheet metal component of a second aluminum alloy (B), whereby the first and second aluminum alloys are AlMgSi type aluminum alloys and, after artificial ageing of the body or component thereof, the second components have lower mechanical strength than the first components,
- wherein at least in the sheet metal of the second aluminum alloy (B), a substantial part of the elements Mg and Si, which are required to achieve artificial ageing in solid solution, are present as separate Mg2Si and/or Si particles before artificial ageing of the body or body part in order to avoid artificial ageing.
A sheet metal AlMgSi type aluminum alloy comprising:
- 0.30 to 0.50 weight percent silicon;
- 0.30 to 0.50 weight percent magnesium;
- max. 0.20 weight percent copper;
- 0.05 to 0.20 weight percent iron,
- max. 0.10 weight percent manganese;
- max. 0.15 weight percent vanadium;
- with production-related contaminants, individually a maximum of 0.05 weight percent, total maximum of 0.15 weight percent, and aluminum as the remainder.
Dependencies are inferred from the claim text.