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Cast aluminum alloy applied to automobile suspension bracket and preparation method of cast aluminum alloy

A technology for casting aluminum alloys and automobile mounts, applied in the field of casting aluminum alloy materials, can solve the problems of not conforming to the development direction of lightweight automobiles, reducing the service life of brackets, increasing the self-weight of automobiles, etc., so as to reduce adverse effects and reduce The effect of reducing raw material cost and weight reduction

Inactive Publication Date: 2014-10-29
CHONGQING CHANGAN AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The suspension bracket made of ordinary cast aluminum alloy, due to various casting defects, greatly reduces the service life of the bracket, and in order to improve the strength of the bracket, replace it with cast iron with higher density, which will increase the weight of the vehicle, which is not suitable for lightweight vehicles. direction of development

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The new cast aluminum alloy material for automobile suspension brackets has a chemical composition of Si: 6.3%, Cu: 3.4%, La: 0.02% and Ce: 0.04%, and the rest is Al. Named as 1# alloy.

[0025] The preparation steps are as follows:

[0026] (1) Firstly, the raw materials are weighed in proportion, the main raw materials include: industrial pure aluminum, industrial pure silicon, electrolytic copper and aluminum rare earth master alloy.

[0027] (2) After heating the industrial pure aluminum, industrial pure silicon and electrolytic copper to 750-850°C in the smelting furnace to melt, add the weighed aluminum rare earth master alloy and keep stirring until uniform.

[0028] (3) Rapid determination of the content of alloying elements in the casting sample, and adjusting the alloying elements to the predetermined range by adding raw materials.

[0029] (4) Cast aluminum liquid into a metal mold to make a blank, and heat it at 150°C for 6-10h for artificial aging. Examp...

Embodiment 2

[0030] The new cast aluminum alloy material for automobile suspension brackets has a chemical composition of Si: 6.7%, Cu: 3.9%, La: 0.03% and Ce: 0.07%, and the rest is Al. Named as 2# alloy.

[0031] The preparation method is the same as in Example 1.

Embodiment 3

[0033] The new cast aluminum alloy material for automobile suspension brackets has a chemical composition of Si: 6.3%, Cu: 3.5%, La: 0.02% and Ce: 0.05%, and the rest is Al. Named as 3# alloy.

[0034] The preparation method is the same as in Example 1.

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PUM

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Abstract

The invention discloses cast aluminum alloy applied to an automobile suspension bracket. The cast aluminum alloy comprises the following chemical components in percentage by weight: 6-7% of Si, 3-4% of Cu, 0.05-0.12% of Re (La, Ce) and the balance of Al, wherein Re (La, Ce) comprises the following components in percentage by weight: 33% of La and 66% of Ce. The cast aluminum alloy is a novel material which is prepared by adding La-Ce mixture rare earth on the basis of the components of aluminum alloy with the brand number being ZL107, and strictly controlling the lower limit of a main alloy element in the national standard range and the content of impurity element Fe; the rare earth elements are added in a manner of Al-Re intermediate alloy. The suspension bracket produced by using the material is good in strength, good in anti-fatigue performance and relatively high in specific strength.

Description

technical field [0001] The invention belongs to the field of non-ferrous metal materials, in particular to casting aluminum alloy materials used in automobiles. Background technique [0002] As the key component of the limit, vibration isolation and load bearing of the automobile engine, the suspension bracket has attracted more and more attention. Since the suspension bracket bears the entire weight of the car engine, and also bears the vibration caused by the running of the car engine and the impact load during rapid acceleration, rapid deceleration and when the car passes through special road conditions, the suspension bracket needs to have good Strength, fatigue resistance and high specific strength. [0003] The suspension bracket made of ordinary cast aluminum alloy, due to various casting defects, greatly reduces the service life of the bracket, and in order to improve the strength of the bracket, replace it with cast iron with higher density, which will increase the...

Claims

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Application Information

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IPC IPC(8): C22C21/02C22C1/03
Inventor 钟宇杨梅王琴彭红
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
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