High-strength Al-Mg-Si aluminum alloy bar for automobile chassis and manufacturing method

A technology of al-mg-si and automobile chassis, which is applied in the field of aluminum alloy rods and its manufacture, can solve the problems of low tensile strength and pre-yield strength, difficulty in meeting the requirements of the carrying capacity of automobile chassis, etc., and achieve strength and plasticity enhancement Effect

Active Publication Date: 2020-03-31
NORTHEAST LIGHT ALLOY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the existing 6082 aluminum alloy bar has low tensile strength and degree of yield, and it is difficult to meet the requirements of the carrying capacity of the automobile chassis, and to provide a high-strength Al-Mg-Si aluminum alloy rod for the automobile chassis Materials and their manufacturing methods

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0021] Specific Embodiment 1: This embodiment is a high-strength Al-Mg-Si aluminum alloy bar for automobile chassis. The mass percentages of each element are as follows: Si is 0.8% to 1.6%, Cu is 0.6% to 1.2%, and Mn is 0.4%-1.0%, Mg 1.0%-2.0%, Zn 0.2%-1.0%, Ti 0.02%-0.05%, Zr 0.06%-0.14%, and the balance Al.

[0022] Advantages of this specific embodiment: the preparation method of aluminum alloy rods for automobile chassis in this specific embodiment strictly controls the percentage of each element in the alloy, and the ingot is subjected to homogenization treatment, so that the second phase in the alloy is fully dissolved into the matrix , the grain structure tends to be uniform, and there is no coarse and uneven second phase, which significantly enhances the strength and plasticity of the aluminum alloy rod after extrusion.

[0023] The aluminum alloy bar for automobile chassis in this specific embodiment is controlled by alloy composition design and heat treatment process...

specific Embodiment approach 2

[0025] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the mass percentages of each element in a high-strength Al-Mg-Si aluminum alloy rod for automobile chassis are as follows: Si is 1.2% to 1.6%, Cu 1.0% to 1.2%, Mn 0.65% to 1.0%, Mg 1.5% to 2.0%, Zn 0.8% to 1.0%, Ti 0.04% to 0.05%, Zr 0.10% to 0.14%, and the balance is Al. Others are the same as the first embodiment.

specific Embodiment approach 3

[0026] Specific embodiment three: present embodiment is a kind of manufacturing method of high-strength Al-Mg-Si aluminum alloy bar material for automobile chassis is completed according to the following steps:

[0027] 1. Weighing:

[0028] According to the mass percentage of each element in aluminum alloy rods for automobile chassis, Si is 0.8% to 1.6%, Cu is 0.6% to 1.2%, Mn is 0.4% to 1.0%, Mg is 1.0% to 2.0%, and Zn is 0.2%. ~1.0%, Ti is 0.02%~0.05%, Zr is 0.06%~0.14%, and the balance is Al. Weigh aluminum-silicon master alloy, aluminum-copper master alloy, aluminum-manganese master alloy, aluminum-zirconium master alloy, pure magnesium ingot, Al-Zn master alloy, Al-Ti master alloy and pure aluminum ingot;

[0029] 2. Melting:

[0030] Add the aluminum-silicon master alloy, aluminum-copper master alloy, aluminum-manganese master alloy, aluminum-zirconium master alloy, pure magnesium ingot, aluminum-zinc master alloy, aluminum-titanium master alloy and pure aluminum ingo...

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Abstract

The invention discloses a high-strength Al-Mg-Si aluminum alloy bar for an automobile chassis and a manufacturing method of the high-strength Al-Mg-Si aluminum alloy bar, and relates to an aluminum alloy bar and a manufacturing method thereof. The invention aims to solve the problems that the existing 6082 aluminum alloy bar is low in tensile strength and yield strength, and the requirement for the bearing capacity of the automobile chassis in the future is difficult to meet are solved. The high-strength Al-Mg-Si aluminum alloy bar for the automobile chassis is composed of Si, Cu, Mn, Mg, Zn,Ti, Zr and Al. The manufacturing method comprises the steps of first, weighing; second, smelting; third, casting an aluminum alloy round cast ingot; fourth, conducting homogenizing annealing treatment; fifth, extruding a finished bar; and sixth, performing solid solution and aging treatment. The scheme is mainly applied to the high-strength Al-Mg-Si aluminum alloy bar for the automobile chassis and the manufacturing of the high-strength Al-Mg-Si aluminum alloy bar.

Description

technical field [0001] The invention relates to an aluminum alloy rod and a manufacturing method thereof. Background technique [0002] At this stage, with the rapid development of the automotive field, higher requirements are put forward for the relevant performance indicators of materials. In order to meet customer needs, it is urgent to further develop and develop comprehensive properties such as high strength, corrosion resistance, fatigue resistance and weldability. Excellent aluminum alloy materials, and the first to occupy the market, put into application. Al-Mg-Si aluminum alloy materials that can be strengthened by heat treatment are widely used in the fields of aerospace, weaponry, transportation and modern architecture. This series of alloys has good castability, formability, weldability and corrosion resistance, but also has disadvantages such as low strength, such as high-strength 6082 aluminum alloy, the typical tensile strength is lower than 400MPa. At the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22C21/08C22C21/18C22C1/03C22F1/043C22F1/047C22F1/057
CPCC22C21/02C22C21/08C22C21/18C22C21/16C22C21/14C22C1/03C22C1/026C22F1/043C22F1/047C22F1/057
Inventor 曹永亮刘显东丛福官王京华李俊乾罗建华殷云霞陈雷刘海涛王杰轩袁丹丹王珊瑚赵胜强
Owner NORTHEAST LIGHT ALLOY CO LTD
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