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Aluminum alloy sheet having high mold-ability

An aluminum alloy plate and formability technology, applied in the field of Al-Mg-Si series aluminum alloy plate, can solve the problems of high formability, failure to achieve, and reduce the strength of 6000 series aluminum alloy plate, and achieve the effect of high formability

Inactive Publication Date: 2018-11-23
KOBE STEEL LTD
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Problems solved by technology

Therefore, although the combination of formability is also taken into consideration, the level does not exceed the range of the usual hemming workability and press formability, and it does not achieve such a strict high formability that is required for the panel materials of automobiles in recent years. sexual purpose
[0023] Therefore, in order to achieve the strict high formability required for such automotive panel applications, the actual situation so far has been to take well-known countermeasures in the past, that is, to change the panel design and change the forming conditions to ease the forming stress. Load, or reduce the strength of the 6000 series aluminum alloy plate during forming, etc.

Method used

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Embodiment

[0160] Next, examples of the present invention will be described. Like the composition shown in Table 1 and the structure shown in Table 2, the composition, the amount of solid solution Si, and the amount of solid solution Cu were produced by changing the manufacturing conditions, and the dislocation density when 5% tensile deformation was applied 6000 series aluminum alloy plates with different structures.

[0161] Then, the amount of solid-solution Si, the amount of solid-solution Cu, the dislocation density when a 5% tensile deformation was applied, the 0.2% yield strength, Tensile strength, yield ratio (0.2% yield strength / tensile strength), total elongation. These results are also shown in Table 2. Here, Table 2 follows Table 1, and the alloy numbers in Table 1 and the numbers in Table 2 correspond to each other the same.

[0162] Specifically, in the separate production method, for the 6000-series aluminum alloy sheet with the chemical composition shown in Table 1, as...

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Abstract

The invention aims to provide a 6000 series aluminum alloy sheet having high mold-ability capable of being manufactured as for an automotive panel material without largely changing a conventional composition or manufacturing condition. High work hardening property is achieved by increasing a solid solution Si amount and a solid solution Cu amount of an Al-Mg-Si-based aluminum alloy sheet at good balance, suppressing localization of transition introduced into a material by tensile deformation during press molding to an automotive panel material with transition density in a specific range when tensile deformation in low strain region to the sheet, increasing transition uniformly from low strain range to high strain range and suppressing non-uniform deformation in molding to the automotive panel material.

Description

[0001] This application is a divisional application of the application with the application number 201610906737.9 and the invention name "High Formability Aluminum Alloy Plate" submitted by the applicant on October 18, 2016. technical field [0002] The present invention relates to an Al-Mg-Si-based aluminum alloy sheet excellent in formability. 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 member or sheet to be used after being subjected to quenching and tempering such as solution treatment and quenching treatment. Aluminum alloy plate before painting and baking hardening. In addition, in the following description, aluminum is also called Al. Background technique [0003] In recent years, social demands for reducing the weight of automobiles and other vehicles have been increasing due to considerations such as the global environment. In order to meet this demand, as a mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22F1/04
CPCC22C21/00C22C21/02C22C21/08C22C21/10C22C21/14C22C21/16C22C21/18C22F1/04C22F1/043C22F1/047C22F1/05C22F1/053C22F1/057
Inventor 有贺康博宍户久郎
Owner KOBE STEEL LTD
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