Aluminum alloy extrusion material with impact-resistant energy absorption characteristic and manufacturing method thereof

A technology of aluminum alloy and extruded material, which is applied in the field of aluminum alloy processing, can solve the problem of insufficient plasticity, impact toughness and stress corrosion cracking resistance, the inability to provide effective protection for the safety of cars and drivers, anti-collision beams and absorbers The energy box is easy to break and break, so as to improve the impact toughness and stress corrosion cracking resistance, improve the impact resistance and energy absorption effect, and eliminate the harm of plasticity and toughness

Active Publication Date: 2019-03-15
GUANGDONG INST OF NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when used to manufacture anti-collision beams and energy-absorbing boxes of automobile bumpers, the plasticity, impact toughness and stress corrosion cracking resistance of the existing Al-Mg-Si-Mn series aluminum alloys are still insufficient. In high-speed collisions, aluminum alloy anti-collision beams and energy-absorbing boxes are easily broken and broken, and the impact-resistant and energy-absorbing effect is greatly reduced, which cannot effectively protect the safety of the car and drivers.

Method used

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  • Aluminum alloy extrusion material with impact-resistant energy absorption characteristic and manufacturing method thereof
  • Aluminum alloy extrusion material with impact-resistant energy absorption characteristic and manufacturing method thereof
  • Aluminum alloy extrusion material with impact-resistant energy absorption characteristic and manufacturing method thereof

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Experimental program
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Effect test

Embodiment 1

[0053] The aluminum alloy extrusion material is composed of the following components by mass percentage: Mg 0.8%, Si 1.0%, Mn 0.5%, Cr 0.21%, Er 0.07%, La 0.15%, Sr 0.08%, Ti 0.015%, B 0.003%, Fe≤0.15%, the balance is Al and other unavoidable impurities, the individual content of other unavoidable impurities is ≤0.05%, and the total amount is ≤0.15%; its manufacturing method includes the following steps:

[0054] The first step: according to the composition and mass percentage of the aluminum alloy extruded material, select the aluminum ingot of the brand Al99.70, the magnesium ingot of the brand Mg9980, AlSi20 alloy, AlMn10 alloy, AlCr10 alloy, AlEr10 alloy, AlLa10 alloy, AlSr5 Alloy rods and AlTi5B1 alloy rods are used as raw materials for batching;

[0055] Step 2: Heat and melt the aluminum ingot at 750°C, then add magnesium ingot, AlSi20 alloy, AlMn10 alloy, AlCr10 alloy, AlEr10 alloy and AlLa10 alloy, stir and melt to form an aluminum alloy liquid;

[0056] The third st...

Embodiment 2

[0064] The aluminum alloy extrusion material is composed of the following components by mass percentage: Mg 0.6%, Si 1.1%, Mn 0.4%, Cr 0.3%, Er 0.1%, La 0.1%, Sr 0.1%, Ti 0.01%, B 0.002%, Fe≤0.15%, the balance is Al and other unavoidable impurities, the individual content of other unavoidable impurities is ≤0.05%, and the total amount is ≤0.15%; its manufacturing method includes the following steps:

[0065] The first step: according to the composition and mass percentage of the aluminum alloy extruded material, select the aluminum ingot of the brand Al99.70, the magnesium ingot of the brand Mg9980, AlSi20 alloy, AlMn10 alloy, AlCr10 alloy, AlEr10 alloy, AlLa10 alloy, AlSr5 Alloy rods and AlTi5B1 alloy rods are used as raw materials for batching;

[0066] Step 2: Heat and melt the aluminum ingot at 760°C, then add magnesium ingot, AlSi20 alloy, AlMn10 alloy, AlCr10 alloy, AlEr10 alloy and AlLa10 alloy, stir and melt to form an aluminum alloy liquid;

[0067] The third step: u...

Embodiment 3

[0075] The aluminum alloy extrusion material is composed of the following components by mass percentage: Mg 0.9%, Si 0.9%, Mn 0.6%, Cr 0.15%, Er 0.05%, La 0.2%, Sr 0.05%, Ti 0.02%, B 0.004%, Fe≤0.15%, the balance is Al and other unavoidable impurities, the individual content of other unavoidable impurities is ≤0.05%, and the total amount is ≤0.15%; its manufacturing method includes the following steps:

[0076] The first step: according to the composition and mass percentage of the aluminum alloy extruded material, select the aluminum ingot of the brand Al99.70, the magnesium ingot of the brand Mg9980, AlSi20 alloy, AlMn10 alloy, AlCr10 alloy, AlEr10 alloy, AlLa10 alloy, AlSr5 Alloy rods and AlTi5B1 alloy rods are used as raw materials for batching;

[0077] Step 2: Heat and melt the aluminum ingot at 740°C, then add magnesium ingot, AlSi20 alloy, AlMn10 alloy, AlCr10 alloy, AlEr10 alloy and AlLa10 alloy, stir and melt to form an aluminum alloy liquid;

[0078] The third step...

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Abstract

The invention provides an aluminum alloy extrusion material with an impact-resistant energy absorption characteristic and a manufacturing method thereof. The aluminum alloy is Al-Mg-Si-Mn alloy, and comprises main alloy elements Mg, Si, Mn and microelements Cr, Er, La, Sr, Ti and B. The manufacturing method comprises the following steps of smelting and preparing aluminum alloy liquid, blowing andrefining in a furnace, online refining and modification, online degassing and filtering, semi-continuous casting, ingot casting homogenization, heating extrusion, on-line quenching and artificial aging. According to the manufacturing method, the modified needle-shaped beta-Fe-rich phase and the excess Si phase are refined and converted into fine and uniform particles and dispersed and distributedin an alpha-Al substrate, so that the harm of the relative strength and plasticity of the needle-shaped Fe-rich phase and the excess Si is eliminated. By forming the multi-element co-lattice dispersedphase particles, recrystallization and crystal grain growth are inhibited, the aluminum alloy extruded material keeps fine fiber crystal tissues, and the impact toughness and the corrosion resistanceare improved. The aluminum alloy extrusion material has an excellent impact-resistant energy absorption effect and is suitable for manufacturing an energy absorption component subjected to impact collision.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy processing, and in particular relates to an aluminum alloy extruded material with impact resistance and energy absorption properties and a manufacturing method thereof. Background technique [0002] Automobile lightweight is to reduce the weight of the automobile as much as possible, improve the dynamic performance of the automobile, reduce fuel consumption, and reduce exhaust pollution on the premise of ensuring the strength and safety performance of the automobile. Lightweight is one of the important measures to achieve energy saving and emission reduction of automobiles, and it is of great significance to the sustainable development of the automobile industry. Aluminum alloy has the advantages of low density, high specific strength, and recyclability. It is the preferred material for automobile lightweight, and its application in automobiles has been expanding in recent years. [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/04C22C1/03C22C1/06C22F1/043
CPCC22C1/026C22C1/03C22C1/06C22C21/04C22F1/043
Inventor 王顺成李新涛周楠黄正华
Owner GUANGDONG INST OF NEW MATERIALS
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