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Technique for improving performance of aluminum alloy control arm for automobile

A process method and aluminum alloy technology, which is applied in the field of aluminum alloy process, can solve the problems of no coarse grains in the low-magnification structure of the profile, coarse grain rings in the low-magnification structure of the profile, and large temperature difference, so as to achieve uniform and sufficient cooling and improve various performance, the effect of small temperature difference

Active Publication Date: 2018-01-23
CHINA ZHONGWANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of this, the present invention aims to solve the problem that the aluminum alloy control arm for automobiles is supplied by extruding round bars, and the large temperature difference between the center and the edge of the round bar profile leads to the problem of coarse-grained rings in the low-magnification structure of the profile after solution heat treatment. , to provide a process method for improving the performance of aluminum alloy control arms for automobiles, the temperature difference between the center and the edge of the prepared profile is smaller than that of the round bar during solution heat treatment, and the low-magnification structure of the profile has no coarse grains

Method used

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  • Technique for improving performance of aluminum alloy control arm for automobile
  • Technique for improving performance of aluminum alloy control arm for automobile
  • Technique for improving performance of aluminum alloy control arm for automobile

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Experimental program
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Embodiment 1

[0030] A process method for improving the performance of an aluminum alloy control arm for automobiles, comprising the following steps:

[0031] A. Ingredients: aluminum alloy ingots are made according to the following mass percentages:

[0032] element

Si

Fe

Cu

mn

Mg

Cr

Ni

Zn

Ti

Al

content

1.15

0.18

0.1

0.8

0.9

0.1

0.05

0.05

0.03

margin

[0033] It also includes other single elements ≤0.03%, and the sum of other elements ≤0.1%;

[0034] B. Melting: put the prepared aluminum alloy raw materials in a melting furnace to melt into liquid aluminum alloy, and melt and cast the liquid aluminum alloy into aluminum alloy ingots. The melting temperature is 720°C, and 2% of aluminum, titanium, boron Refining agent, after the aluminum alloy raw material in the smelting furnace is completely melted, it is evenly stirred by the stirring device;

[0035] C. Homogenization treatment: homogenize the al...

Embodiment 2

[0042] The difference between embodiment 2 and embodiment 1 is that in step A, the aluminum alloy ingot is proportioned according to the following mass percentages:

[0043] element

[0044] It also includes other single elements ≤ 0.03%, and the sum of other elements ≤ 0.1%.

Embodiment 3

[0046] The difference between embodiment 3 and embodiment 1 is that in step A, the aluminum alloy ingot is proportioned according to the following mass percentages:

[0047] element

[0048] It also includes other single elements ≤ 0.03%, and the sum of other elements ≤ 0.1%.

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Abstract

The invention belongs to the technical field of aluminum alloy techniques, and relates to a technique for improving the performance of an aluminum alloy control arm for an automobile. Alloy elements of an aluminum alloy cast ingot include 1.15%-1.25% of Si, 0.18-0.25% of Fe, no more than 0.1% of Cu, 0.8%-0.9% of Mn, 0.9%-1.0% of Mg, 0.1%-0.2% of Cr, no more than 0.05% of Ni, no more than 0.05% ofZn, 0.03%-0.08% of Ti, no more than 0.03% of each of other elements, wherein the total content of other elements is no more than 0.1%. According to the technique for improving the performance of the aluminum alloy control arm for the automobile, a 75MN horizontal extruder is adopted, the section of the 75MN horizontal extruder is approximately in a T shape, the heating temperature of a mold is 450-500 DEG C, the heating temperature of an extrusion cylinder is 420-460 DEG C, the heating temperature for the cast ingot is 480-510 DEG C, the extrusion speed is 1-3 m / min, and the extrusion ratio is14.7; and a water mist cooling method is adopted, the microstructure of a profile is free of coarse grains after solid solution heat treatment (at the temperature of 545+ / -5 DEG C for 2h), and the performance of the profile meets agreement standards through aging heat treatment after solid solution heat treatment.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy technology, and relates to a process method for improving the performance of an aluminum alloy control arm for automobiles. Background technique [0002] Due to the shortage of resources and environmental pollution, automobile lightweight has become the focus of attention of various enterprises in the industry. Therefore, aluminum with high strength and only one-third of the density of iron has become the best choice for lightweight materials for automobiles. [0003] Nowadays, in the automobile chassis assembly, the control arm parts have widely used aluminum alloy instead of steel materials, and the technological innovation brought about by this can be imagined. Due to the high cost of aluminum alloy welding, the manufacturing process of the control arm has changed from the original stamping and welding of steel plates to aluminum alloy extrusion profiles, cutting materials, bending prof...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22F1/043C22C1/06
Inventor 高爽王睿李延军刘建生高彤远继才杨明
Owner CHINA ZHONGWANG
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