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Aluminum alloy plate having excellent moldability and bake hardening properties

A kind of aluminum alloy plate and hardening technology, applied in the field of Al-Mg-Si series aluminum alloy plate

Inactive Publication Date: 2016-11-09
KOBE STEEL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In these technologies, in order to limit the amount of GPI produced, it is limited that there is no endothermic peak in the temperature range of 150 to 250°C corresponding to the melting of GPI in the DSC of T4 material (after solution treatment and natural aging).

Method used

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  • Aluminum alloy plate having excellent moldability and bake hardening properties
  • Aluminum alloy plate having excellent moldability and bake hardening properties
  • Aluminum alloy plate having excellent moldability and bake hardening properties

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Embodiment

[0107] Hereinafter, the present invention will be described in more detail by enumerating examples, but the present invention is certainly not limited by the following examples, and can also be appropriately modified and implemented within the scope of being able to meet the purpose of the foregoing and the following, and these are all included in the scope of the present invention. within the technical range.

[0108] Hereinafter, examples of the present invention will be described. In the present invention, 6000-series aluminum alloy sheets having different structures specified in DSC were produced by changing the conditions of pre-aging treatment after solution treatment and quenching treatment. Then, the BH property (coating bake hardenability) after holding at room temperature for 30 days after the plate production, the As yield strength as an index of press formability, and the hemming workability as a bending workability were measured and evaluated respectively.

[010...

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Abstract

The purpose of the present invention is to provide an aluminum alloy plate capable of having a 0.2% proof stress during molding of 110 MPa oe below and a 0.2% proof stress after BH of 170 MPa or above, and particularly provides an aluminum alloy plate including, in mass%, 0.2%-1.0% of Mg and 0.2%-1.0% of Si, fulfilling {(Mg content)+(Si content)}<=1.2%, having a 20-50 muW / mg high exothermic peak within a temperature range of 230-330 DEG C in a differential scanning calorimetry curve, and having both excellent moldability and excellent bake hardening properties.

Description

technical field [0001] The present invention relates to an Al-Mg-Si based aluminum alloy plate. The aluminum alloy sheet referred to in the present invention is a rolled sheet such as a hot-rolled sheet or a cold-rolled sheet, and refers to a sheet that has been subjected to quenching and tempering such as solution treatment and quenching treatment, and then press-formed or bake-coated and hardened. Aluminum alloy plate before processing. In addition, aluminum is also called Al in the following description. Background technique [0002] In recent years, society has increasingly demanded weight reduction of vehicles such as automobiles in consideration of the global environment and the like. In order to meet this demand, as a material for large body panel structures (outer panels, inner panels) of automobiles, in addition to steel materials such as steel sheets, aluminum alloy materials that are excellent in formability and bake hardenability and are lighter in weight appl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22C21/06C22F1/00C22F1/05
CPCC22C21/02C22C21/06C22C21/08C22F1/05C22F1/047
Inventor 穴户久郎松本克史有贺康博
Owner KOBE STEEL LTD