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Clad automotive sheet product

A technology for cladding sheets and products, applied in the direction of layered products, metal layered products, transportation and packaging, etc., to achieve the effect of good curling performance and holding ability

Inactive Publication Date: 2011-07-06
NOVELIS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Nothing in these prior art disclosures suggests that the combination of the alloy in the core and cladding also provides very good hemming properties after pre-straining, the hemmability remains excellent after aging, while also showing significant Ability to age harden

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment

[0033] a) Sample preparation:

[0034] Composite ingots according to the invention were cast using the method described in WO04 / 112992. The composite ingot has two cladding layers of the same composition, one on each side of the core layer.

[0035] For comparison purposes, composite ingots were also cast using the casting method described in WO04 / 112992 to provide samples according to WO07 / 128391 and JP62-207642. In the case of the samples according to WO07 / 128391, the core layer is a 6016 alloy and the two cladding layers are low solute 6XXX series alloys. In the case of the sample according to JP62-207642, the core layer is also 6016 alloy, and the two cladding layers are of the same composition and are based on AA5005.

[0036] Furthermore, formulated monolithic automotive sheet alloys AC170, AA6016 and alloys according to EP1685268 are produced by conventional DC casting routes.

[0037] The chemical compositions of the samples tested are shown in Table 1.

[0038] In...

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PUM

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Abstract

The present invention relates to an automotive clad sheet product comprising a core Sayer and at least one clad layer wherein the core comprises an alloy of the following composition in weight %: Mg 0.45-0,8, Si 0.45-0.7, Cu 0.05-0.25, Mn 0.05-0.2, Fe up to 0,35, other elements (or impurities) <0,05 each and <0.15 in total, balance aluminium; and the at least one clad layer comprises an alloy of the following composition in weight %: Mg 0.3-0.7, Si 0,3-0.7, Mn up to 0,15, Fe up to 0.35, other elements (impurities) <0.05 each and <0.15 in total, balance aluminium. The clad automotive sheet product provides excellent hemmabtlity which does not substantially change over time and yet also provides a good age-hardening response after bake hardening.

Description

technical field [0001] The present invention relates to composite aluminum panels intended mainly for automotive applications. The panel product consists of a core of 6XXX series aluminum alloy and at least one cladding layer of another 6XXX series aluminum alloy. Background technique [0002] The use of aluminum sheet material in automotive production has been established for many years. A range of different alloys are used depending on the particular requirements of the vehicle designer for specific components. In certain applications, it is desirable for the material to have high strength. Other applications however require higher formability, and in this case strength may not be considered critical. There is also a desire for the material to deform easily under impact, for example in the event of a collision with a pedestrian, such a material could have a lower strength. [0003] For automotive sheet users, formability means two requirements. There is a formability ...

Claims

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Application Information

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IPC IPC(8): B32B15/01C22C21/02C22C21/08
CPCC22C21/02C22C21/08B32B15/016Y10T428/12764Y10T428/12736C22C21/00B32B15/00
Inventor J·蒂姆C·巴锡
Owner NOVELIS INC
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