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Aluminum alloy sheet and aluminum alloy sheet manufacturing method

A technology of aluminum alloy plate and manufacturing method, applied in the field of 6000 series aluminum alloy plate

Active Publication Date: 2018-11-23
KOBE STEEL LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0021] Therefore, there is still room for improvement in order to achieve both good formability and high BH properties in the Al-Mg-Si-based aluminum alloy sheet after long-term room temperature aging in such a high-temperature bake-coating hardening treatment.
[0022] In addition, after achieving both good formability and high BH properties in the bake coating hardening treatment at a high temperature, high BH properties can also be obtained in the bake coating hardening treatment at a low temperature. room for improvement
[0023] That is, there is still room for improvement in the technical problem of simultaneously achieving elongation, high-temperature BH properties, and low-temperature BH properties, which can be said to be contradictory

Method used

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  • Aluminum alloy sheet and aluminum alloy sheet manufacturing method
  • Aluminum alloy sheet and aluminum alloy sheet manufacturing method
  • Aluminum alloy sheet and aluminum alloy sheet manufacturing method

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Experimental program
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Embodiment

[0099] Next, examples of the present invention will be described. 6000-series aluminum alloy sheets having different structures specified by DSC according to the present invention were produced by changing the composition and production conditions. Then, after the board was kept at room temperature for 100 days after manufacture, the As yield strength (yield strength before bake coating hardening treatment) and AB yield strength (yield strength after bake coating hardening treatment), and the elongation at break were measured and evaluated respectively. Elongation, BH (coating bake hardening). The results are shown in Tables 1 and 2.

[0100] Specifically, the separate production method was performed by variously changing the pre-aging treatment conditions after solution treatment and quenching treatment as shown in Table 2 for 6000 series aluminum alloy plates having the compositions shown in Table 1. Here, in the display of the content of each element in Table 1, the numer...

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Abstract

In a differential scanning calorimetric curve of an Al-Mg-Si aluminum alloy sheet with a specific composition in which the total content of Mg and Si is greater than 1.2%, the ratio (B / A) of an endothermic peak in the 150-230 DEG C temperature range with a height A of 3-10 [mu]W / mg to an exothermic peak in the 230 DEG C to less than 330 DEG C temperature range with a height B of 20-50 [mu]W / mg isin a specified range.

Description

technical field [0001] The present invention relates to a 6000-series aluminum alloy sheet produced by ordinary rolling, and is a 6000-series aluminum alloy sheet excellent in formability and bake hardenability. Background technique [0002] In recent years, from the perspective of the global environment and the like, social demands for reducing the weight of automobile bodies have been increasing. In order to meet such demands, in automobile bodies, aluminum alloy materials are used for large body panels (outer panels, inner panels) instead of conventional steel materials such as steel plates. [0003] In the large vehicle body panel, in panels such as an outer panel (outer panel) and an inner panel (inner panel) of a panel structure such as a hood, a fender, a door, a roof, and a trunk lid, as As the thin-walled high-strength aluminum alloy plate, Al-Mg-Si-based AA to JIS 6000-series (hereinafter, all are referred to as 6000-series) aluminum alloy plates are used. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22C21/06C22C21/12C22F1/05C22F1/00
CPCC22C21/02C22C21/08C22C21/12C22F1/05C22C2202/00
Inventor 宍户久郎北村智之
Owner KOBE STEEL LTD
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