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Aluminum alloy plate and method for manufacturing aluminum alloy plate

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

Active Publication Date: 2021-06-08
KOBE STEEL LTD
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  • Summary
  • Abstract
  • Description
  • 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 plate and method for manufacturing aluminum alloy plate
  • Aluminum alloy plate and method for manufacturing aluminum alloy plate
  • Aluminum alloy plate and method for manufacturing aluminum alloy plate

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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 the differential scanning calorimetry curve of an Al-Mg-Si-based aluminum alloy plate of a specific composition with a total content of Mg and Si higher than 1.2%, the height A is 3 to 10 μW in the temperature range of 150 to 230°C The ratio (B / A) of the endothermic peak / mg to the exothermic peak having a height B of 20 to 50 μW / mg in the temperature range from 230°C to less than 330°C is within a specific 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 Patents(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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