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A kind of high energy absorption al-mg-si-cu alloy and preparation method thereof

An energy-absorbing, al-si technology, which is applied in the field of high energy-absorbing Al-Mg-Si-Cu alloy and its preparation, can solve the problems of limited application fields and poor energy-absorbing performance of aluminum alloy profiles, and achieves extended service. range, improved strength and casting fluidity, improved hot work plasticity

Active Publication Date: 2021-02-09
CHINA ZHONGWANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention provides a high energy-absorbing Al-Mg-Si-Cu alloy and a preparation method thereof in order to solve the problem of poor energy-absorbing performance of the existing aluminum alloy profiles and limiting its application field

Method used

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  • A kind of high energy absorption al-mg-si-cu alloy and preparation method thereof
  • A kind of high energy absorption al-mg-si-cu alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A preparation method for a high energy-absorbing Al-Mg-Si-Cu alloy, comprising the following steps:

[0029] A. Calculate the amount of each aluminum alloy raw material and prepare the aluminum alloy raw material according to the ratio. The ratio of the mass percentage of each element of the aluminum alloy plate raw material is as follows:

[0030] element Si Fe Cu mn Mg Cr V Ti Impurities Al content 0.6 0.35 0.4 0.3 0.6 0.1 0.1 0.1 0.1 margin

[0031] Preheat all raw materials at 200±10°C, first put pure aluminum into the melting furnace for melting, the melting temperature is 690±5°C, add Al-Si master alloy when the pure aluminum starts to melt, wait for Al-Si After the alloy is melted, Al-Cu, Al-Cr, Al-Mn, and Al-V alloys are sequentially added to the center of the melt in the furnace. After the alloy is fully melted and mixed, the temperature is lowered. When the temperature drops to 670°C, pure magnesium is quickly add...

Embodiment 2

[0038] The difference between embodiment 2 and embodiment 1 is that in step A, the mass percentage ratio of each element of the aluminum alloy plate raw material is as follows:

[0039] element Si Fe Cu mn Mg Cr V Ti Impurities Al content 0.8 0.35 0.5 0.3 0.8 0.2 0.2 0.1 0.1 margin

[0040] Preheat all raw materials at 200±10°C, first put pure aluminum into the melting furnace for melting, the melting temperature is 690±5°C, add Al-Si master alloy when the pure aluminum starts to melt, wait for Al-Si After the alloy is melted, Al-Cu, Al-Cr, Al-Mn, and Al-V alloys are added to the center of the melt in the furnace in sequence. After the alloy is fully melted and mixed, the temperature is lowered. When the temperature drops to 670°C, pure magnesium is quickly added.

Embodiment 3

[0042] The difference between Example 3 and Example 1 is that in step F, the stretched and straightened aluminum alloy profile is subjected to double-stage artificial aging within 24 hours, the first-stage artificial aging process is 150°C×2h, and the second-stage artificial aging The process is 220°C×4h to obtain high energy-absorbing Al-Mg-Si-Cu aluminum alloy extruded profiles.

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Abstract

The invention belongs to the field of aluminum alloy material manufacturing and relates to an Al-Mg-Si-Cu alloy with a high energy absorption property, the alloy is prepared by the following elementsin percentage by weight: 0.6-1.0% of Si, less than or equal to 0.35% of Fe, 0.4-0.7% of Cu, less than or equal to 0.3% of Mn, 0.6-1.0% of Mg, 0.1-0.3% of Cr, 0.1-0.3% of V, less than or equal to 0.1%of Ti, less than or equal to 0.05% of the rest single impurity content, less than or equal to 0.15% of total impurity and the balance of Al. in the preparation method, the stretched and straightened aluminum alloy profile is subjected to two-stage artificial aging within 24 hours, the first-stage artificial aging process is 150+ / -5 DEG C * (1-2)h, and the second-stage artificial aging process is 220+ / -5 DEG C * (4-5)h; aluminum alloy materials with better mechanical properties and energy absorption properties can be produced by adjusting alloy compositions and subsequent production processes,the safety of the aluminum alloy as an energy absorption element is improved, and the application range of the aluminum alloy in traffic products is enlarged.

Description

technical field [0001] The invention belongs to the field of aluminum alloy material manufacture, and relates to a high energy-absorbing Al-Mg-Si-Cu alloy and a preparation method thereof. Background technique [0002] Due to its excellent performance, Al-Mg-Si-Cu alloy has been widely used in automobiles, subways, high-speed rails and other vehicles. In order to improve the safety of traffic products, in addition to some common safety devices, crash energy-absorbing components are indispensable. Aluminum alloy profiles used in transportation products often need to withstand certain impact loads, so the energy absorption performance of aluminum alloys when they are impacted by collisions has attracted much attention. [0003] Aluminum alloys have been used in the design of energy-absorbing structures due to their good impact energy-absorbing performance and formability, but the domestic industry is relatively backward in this field, and most of the energy-absorbing componen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/02C22C21/08C22C1/03C22C1/06C22F1/05
CPCC22C1/026C22C1/03C22C1/06C22C21/02C22C21/08C22F1/002C22F1/05
Inventor 孙亮祝哮谢方亮刘兆伟
Owner CHINA ZHONGWANG
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