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Aluminum alloy extrudate with excellent bending crushing strength and corrosion resistance

A corrosion-resistant, extruded material technology, which is applied in the field of Al-Mg-Si aluminum alloy extruded materials and its manufacturing, can solve the problems of poor corrosion resistance, difficult recycling, and many alloy components, and achieve corrosion resistance Excellent, the effect of improving the bending crushability

Inactive Publication Date: 2014-02-19
KOBE STEEL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the 7000-series aluminum alloy extruded material has many alloy components, so it is difficult to carry out the aforementioned recycling, and the production cost is also high.
In addition, there is also the problem of poorer corrosion resistance than 6000 series aluminum alloy extrusions.

Method used

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  • Aluminum alloy extrudate with excellent bending crushing strength and corrosion resistance
  • Aluminum alloy extrudate with excellent bending crushing strength and corrosion resistance
  • Aluminum alloy extrudate with excellent bending crushing strength and corrosion resistance

Examples

Experimental program
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Effect test

Embodiment

[0112] Next, examples of the present invention will be described. According to the components shown in Tables 1 and 2, and under the conditions shown in Tables 3 and 4, 6000-series aluminum alloy extrusions with a Japanese cross-section were manufactured. As shown in Tables 5 and 6, the structure of the extrusions was investigated. In addition, the properties (mechanical properties, bending crushability) were investigated.

[0113] 【Table 1】

[0114] Chemical composition (mass%)

[0115]

[0116] *Except for the provisions of the present invention

[0117] 【Table 2】

[0118] Chemical composition (mass%)

[0119]

[0120] *Outside the specified scope of the present invention

[0121] 【table 3】

[0122] Manufacturing method

[0123]

[0124] *Except for the provisions of the present invention

[0125] 【Table 4】

[0126] Manufacturing method

[0127]

[0128] *Except for the provisions of the present invention

[0129] More specifically, the extruded materi...

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Abstract

Disclosed is an Al—Mg—Si aluminum alloy extrudate which contains, in terms of mass %, 0.60-1.20% Mg, 0.30-0.95% Si, 0.01-0.40% Fe, 0.30-0.52% Mn, 0.001-0.65% Cu, and 0.001-0.10% Ti and in which the contents of Mg and Si satisfy Mg(%)−(1.73×Si(%)−0.25)≧0 and the remainder comprises Al. The extrudate has an equi-axed recrystallized grain texture in which the areal proportion of recrystallized grains is 65% or higher. In examination with a TEM having a magnification of 5,000, intergranular precipitate grains having a size of 1 μm or more in terms of center-of-gravity diameter are apart from one another at an average spacing exceeding 25 μm. The average areal proportion of Goss-orientation grains is less than 8% throughout the whole thickness of this extrudate.

Description

technical field [0001] The present invention relates to an Al-Mg-Si-based aluminum alloy extruded material excellent in bending crushability and a method for producing the same (hereinafter, aluminum is simply referred to as Al). In addition, the aluminum alloy extruded material mentioned in the present invention refers to an extruded material subjected to hot extrusion, but also includes a member assembled as an automobile body reinforcement (energy absorbing member) described later. Hereinafter, the Al-Mg-Si system is also referred to as the 6000 system. Background technique [0002] In order to use such a 6000-series aluminum alloy extruded material as the aforementioned reinforcing material, there have been proposals related to the structure of the extruded material to improve the lateral crushability of the reinforcing material and to improve the bending workability of the reinforcing material. propose. [0003] For example, Patent Document 1 proposes improving bendin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/08C22F1/05
CPCC22C21/08C22C21/02B21C23/002
Inventor 伊原健太郎志镰隆广
Owner KOBE STEEL LTD