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Aluminum alloy section of secondary stress member of automobile bumper and preparation method thereof

A technology for automobile bumpers and aluminum alloy profiles, which is applied in the field of aluminum alloy profiles and their preparation for secondary stress-bearing components of automobile bumpers, and can solve problems such as the inability to form stable large-scale production capacity

Active Publication Date: 2011-03-09
天津锐新昌科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The conventional 6060 (Al-Mg-Si) alloy is difficult to meet this special requirement due to its wide range of alloying elements, the number, shape and distribution of strengthening phases caused by alloying elements, and the history of heat treatment, let alone form a stable Large-scale production capacity

Method used

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  • Aluminum alloy section of secondary stress member of automobile bumper and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] An aluminum alloy profile of a secondary stress-bearing component of an automobile bumper, the 6060 aluminum alloy material used for the component is composed of the following components by weight and number,

[0017] Mg 0.56 Si 0.32 Fe 0.1

[0018] Mn 0.01 Cu 0.01 Ti 0.01

[0019] Zn 0.02 Cr 0.02 The rest is Al.

[0020] The preparation method of the aluminum alloy profile of the secondary stress-bearing member of the above-mentioned automobile bumper is carried out according to the following steps, 1) the aluminum alloy extruded round ingot that meets the above-mentioned composition requirements and adopts the conventional ingot casting process is prepared, and the ingot heating temperature is 490- 510°C; 2) The aluminum alloy extruded round ingot adopts the conventional extrusion process, and the quenching temperature is 520-530°C. After obtaining the extruded profile, it is placed in an aging heat treatment furnace within 48 hours, according to the aging temperatur...

Embodiment 2

[0022] An aluminum alloy profile of a secondary stress-bearing component of an automobile bumper, the 6060 aluminum alloy material used for the component is composed of the following components by weight and number,

[0023] Mg 0.58 Si 0.35 Fe 0.2

[0024] Mn 0.02 Cu 0.02 Ti 0.02

[0025] Zn 0.03 Cr 0.03 The rest is Al.

[0026] The preparation method of the aluminum alloy profile of the secondary force-bearing member of the automobile bumper is carried out according to the steps of Example 1.

Embodiment 3

[0028] An aluminum alloy profile of a secondary stress-bearing component of an automobile bumper, the 6060 aluminum alloy material used for the component is composed of the following components by weight and number,

[0029] Mg 0.57 Si 0.33 Fe 0.15

[0030] Mn 0.005 Cu 0.008 Ti 0.01

[0031] Zn 0.02 Cr 0.02 The rest is Al.

[0032] The preparation method of the aluminum alloy profile of the secondary force-bearing member of the automobile bumper is carried out according to the steps in Example 1. After the above selective control, the excess Mg type 6060 aluminum alloy is obtained; the amount of Mg2Si strengthening phase is 0.93%, and the amount of excess Mg is 0.1%. At the same time, the content of Fe as a harmful element and the influence of other impurities are strictly limited.

[0033] Using the unconventional artificial aging process of extruded profiles, the arithmetic mean value of the test data based on 20 samples is as follows:

[0034] Tensile strength Rm=228Mpa,...

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Abstract

The invention relates to an aluminum alloy section of a secondary stress member of an automobile bumper and a preparation method thereof. The invention is characterized in that the 6060 aluminum alloy material of the member comprises the following components in parts by weight: 0.56-0.58 part of Mg, 0.32-0.35 part of Si, no more than 0.2 part of Fe, no more than 0.02 part of Mn, no more than 0.02 part of Cu, no more than 0.02 part of Ti, no more than 0.03 part of Zn, no more than 0.03 part of Cr, and the balance of Al. The preparation method comprises the following steps: preparing an aluminum alloy round ingot from the raw materials; extruding a section and placing the section in an aging thermal treatment furnace within 48 h, wherein the aging temperature is between 165 and 170 DEG C; and preserving heat for 3.5 h and then performing the aging thermal treatment. The invention has the beneficial effects that by introducing alloy elements, the precipitation phase number is selectively controlled and a proper amount of precipitation phase distribution is formed; the special requirements on the mechanical property of the secondary stress member of the automobile bumper can be satisfied; and batch production can be realized.

Description

technical field [0001] The invention belongs to a preparation method of an aluminum alloy extruded member, in particular to an aluminum alloy profile of a secondary force-bearing member of an automobile bumper and a preparation method thereof. Background technique [0002] For specific functional purposes, certain aluminum alloy extrusion components often have special functional requirements for the mechanical properties of materials and products. For example, it is used in the "crash box" 6060 aluminum alloy extruded component in the rear bumper frame assembly of the automobile. As a secondary stressed component whose main function is to absorb sudden impact energy, the control range of the mechanical properties of the supplied product The following special requirements are put forward: tensile strength Rm≥190Mpa; non-proportional elongation strength Rpo.2=180±20Mpa and elongation after break A5≥12%. This requirement stipulates that the extruded member must meet the requir...

Claims

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Application Information

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IPC IPC(8): C22C21/08C22F1/047
Inventor 国占昌
Owner 天津锐新昌科技股份有限公司
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