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A new al-mg-si aluminum alloy energy-absorbing material for collision and its preparation method

A technology of energy-absorbing materials and aluminum alloys, which is applied in the field of aluminum alloy materials to achieve the effects of alleviating supersaturation, improving safety, and improving energy-absorbing capacity

Active Publication Date: 2022-05-20
CHINA ZHONGWANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In order to increase the safety of the automobile body, in addition to some common safety devices, collision energy-absorbing components are indispensable, but the existing energy-absorbing components are still mostly traditional steel structures

Method used

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  • A new al-mg-si aluminum alloy energy-absorbing material for collision and its preparation method
  • A new al-mg-si aluminum alloy energy-absorbing material for collision and its preparation method
  • A new al-mg-si aluminum alloy energy-absorbing material for collision and its preparation method

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preparation example Construction

[0032] A method for preparing a novel Al-Mg-Si aluminum alloy energy-absorbing material for collision, comprising the following steps: Aluminum ingot preparation: preparing an aluminum ingot according to the composition ratio of the Al-Mg-Si aluminum alloy energy-absorbing material; homogenizing heat treatment: The temperature is 575±5°C, the time is 4.5±0.5h, the heating rate is 80±1°C / h, and it is cooled directly after being out of the furnace, and the cooling rate is greater than 10°C / min; extrusion processing: extrude aluminum ingots with extrusion dies The profile is obtained by pressing; aging treatment: the extruded profile is pre-aged within 4±0.5h, and then artificially aged. The temperature of the treatment is 205±3°C, and the time is 7±0.5h.

[0033] In the present invention, online quenching treatment is directly carried out after extrusion processing, short-time pre-aging treatment is directly carried out after online quenching treatment, and the process of short-...

Embodiment

[0041] A kind of preparation method of Al-Mg-Si aluminum alloy energy-absorbing material for novel collision, comprises the following steps:

[0042] Ingredients: Calculate the amount of each aluminum alloy raw material and prepare the aluminum alloy raw material according to the ratio, so that the mass percentage of the alloy composition is controlled at: Si: 0.65-0.85%, Fe≤0.15%, Cu: 0.30-0.35, Mn: 0.60-0.75%, Mg : 0.65-0.75%, Cr: 0.20-0.30%, Ti ≤ 0.1%, the content of other individual impurities ≤ 0.05%; the total of other impurities ≤ 0.15%; the balance is Al.

[0043] Melting and casting: using the conventional semi-continuous casting method, casting cast rods.

[0044] Homogenization heat treatment: (575±5℃x4.5h), the heating rate is 80±1℃ / h, the ingot temperature is monitored in real time during the heating process, water cooling is performed directly after the furnace is released, the cooling rate is greater than 10℃ / min, and the lathe after cooling Car remove the 5mm ...

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Abstract

The invention relates to a novel Al-Mg-Si aluminum alloy energy-absorbing material for collision and a preparation method thereof, which belongs to the technical field of aluminum alloy materials. The Al-Mg-Si aluminum alloy energy-absorbing material contains the following mass percentage: Si: 0.65 ‑0.85%, Fe≤0.15%, Cu: 0.30‑0.35, Mn: 0.60‑0.75%, Mg: 0.65‑0.75%, Cr: 0.20‑0.30%, Ti≤0.1%, the remaining single impurity content ≤0.05%; the rest Total impurities ≤ 0.15%; the balance is Al. The invention can effectively prevent the recrystallization process by adding a large amount of Mn elements in the alloy, increase the recrystallization temperature of the profile, make the recrystallization grains significantly refined during the extrusion process, and further improve the energy absorption capacity of the material.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy materials, and relates to a novel Al-Mg-Si aluminum alloy energy-absorbing material for collision and a preparation method thereof. Background technique [0002] In automobile production, in order to meet the corporate average fuel efficiency (CAFE) standard, lightweight is one of the research directions of new automobiles. In order to solve this phenomenon, automakers began to use aluminum alloy instead of traditional steel materials. Al-Mg-Si-Cu alloy has been widely used in automobile body because of its excellent performance. In order to increase the safety of the automobile body, in addition to some common safety devices, crash energy-absorbing components are indispensable, but the existing energy-absorbing components are still mostly traditional steel structures. [0003] Aluminum alloy has been used in the design of energy-absorbing structures because of its good impact energy-abso...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/02C22C21/08C22C21/00C22F1/043C22F1/047C22F1/05C22F1/04
CPCC22C21/02C22C21/08C22C21/00C22F1/043C22F1/047C22F1/05C22F1/04C22F1/002
Inventor 张伟祝哮孙巍李秋梅孟旭董刘颖李雪科王克刘欢
Owner CHINA ZHONGWANG
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