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Aluminum alloy plate having excellent bake hardening properties

An aluminum alloy plate and hardenability technology, applied in the field of Al-Mg-Si series aluminum alloy plate, can solve the problems of reduced BH property and inability to improve yield strength, and achieve the effect of high BH property

Inactive Publication Date: 2016-04-20
KOBE STEEL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Furthermore, in the case where such aging at room temperature is large, the BH property is lowered, and the yield strength cannot be increased to the as the required strength of the panel

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0242]Next, examples of the present invention will be described. First, examples of the first embodiment of the present invention will be described. 6000-series aluminum alloy plates with different cluster conditions specified in this embodiment were prepared by stopping quenching at a relatively high temperature during solution treatment and quenching treatment and maintaining the temperature at the same temperature, and evaluated the retention at room temperature for 7 BH property (painting bake hardening property) after 100 days and 100 days. In addition, press formability and hemming workability as bending workability were also evaluated.

[0243] The above-mentioned cluster conditions specified in the present embodiment refer to the average number density of atomic aggregates, the average radius of the equivalent circle diameter, and the standard deviation of the radius of the equivalent circle diameter. In addition, the aggregate of atoms satisfies a total of 10 or mor...

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Abstract

One of the purposes of the present invention is to provide a 6000-series aluminum alloy plate exhibiting bake hardening (BH) properties and molding properties after aging at room temperature for a long period. In one embodiment of the present invention, in a Sn-containing 6000-series aluminum alloy plate, specific clusters that greatly contribute to the development of the BH properties, which are determined by means of a three-dimensional atom probe field ion microscope, are contained at a predetermined density or more, and the sizes of the atom clusters that meet the aforementioned requirement are uniformed to adjust the average radius of an equivalent circle diameter of each of the clusters to a value falling within a specified range and reduce the standard deviation of the radius of the equivalent circle diameter, whereby the BH properties after aging at room temperature for a long period can be improved.

Description

technical field [0001] The present invention relates to an Al-Mg-Si based aluminum alloy plate. The so-called aluminum alloy sheet in the present invention refers to a rolled sheet such as a hot-rolled sheet or a cold-rolled sheet after being subjected to quenching and tempering such as solution treatment and quenching treatment, and before artificial aging treatment such as baking coating hardening treatment. aluminum alloy plate. In addition, in the following description, aluminum is also called Al. Background technique [0002] In recent years, there has been an increasing social demand for weight reduction of vehicles such as automobiles in consideration of the global environment and the like. In order to respond to this demand, as a material for automotive panels, especially large body panels (outer panels, inner panels) such as hoods, doors, and roofs, in addition to steel materials such as steel sheets, excellent formability and bake hardenability , The application...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22C21/06C22F1/05C22F1/00
CPCC22C21/02C22F1/05C22C21/08C22F1/047C22F1/043C21D1/18
Inventor 穴户久郎松本克史有贺康博
Owner KOBE STEEL LTD
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