Function integrated support of air suspension and special high-strength cast-state ductile iron material of support

An air suspension, high-strength technology, applied in suspension, elastic suspension, transportation and packaging, etc., can solve problems such as high scrap rate, abnormal system movement, complex structure, etc., reduce cost and time, and improve fuel consumption Economical and lightweight

Active Publication Date: 2018-02-16
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The air spring supports disclosed in Patent Document 1 and Patent Document 2 do not realize the functional integration of the bracket and the air spring upper cover mounting bracket; the bracket shown in Patent Document 3 belongs to the front air suspension bracket and has no air storage function. Complexity, high risk of process defects, high casting difficulty, high scrap rate, high cost, insufficient rigidity of the main body contour, easy to cause abnormal movement of the system

Method used

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  • Function integrated support of air suspension and special high-strength cast-state ductile iron material of support
  • Function integrated support of air suspension and special high-strength cast-state ductile iron material of support
  • Function integrated support of air suspension and special high-strength cast-state ductile iron material of support

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Effect test

Embodiment 1

[0023] This embodiment is a cast ductile iron with high yield strength and high toughness, the weight percentage of its chemical composition is: C: 2.94%, S: 0.022%, P: 0.019%, Mn: 0.3%, Si: 4.4%, Cr : 0.16%, Mg: 0.04%, Re: 0.03%, and the rest is Fe.

[0024] The above materials are prepared by sand casting through batching, electric furnace smelting and spheroidizing inoculation. The production method is as follows:

[0025] Step 1: Proportion pig iron, steel scrap and other required alloy ingredients according to the given chemical composition ratio;

[0026] Step 2: Put the prepared material into the electric furnace for melting;

[0027] Step 3: Add spheroidizing inoculant during the smelting process, pour the finished sand mold after the spheroidizing incubation time is satisfied,

[0028] After cooling and molding, the casting of the required material is obtained:;

[0029] Step 4: Attach the above-mentioned casting to the test bar for tensile properties. The average ...

Embodiment 2

[0031] This embodiment is a cast ductile iron with high yield strength and high toughness, the weight percentage of its chemical composition is: C: 3.72%, S: 0.01%, P: 0.04%, Mn: 0.35%, Si: 2.2%, Cr : 0.18%, Mg: 0.02%, Re: 0.01%, and the rest is Fe.

[0032] The above materials are prepared by sand casting through batching, electric furnace smelting, spheroidizing and inoculating. Its production method is:

[0033] Step 1: Proportion pig iron, steel scrap and other required alloy ingredients according to the given chemical composition ratio;

[0034] Step 2: Put the prepared material into the electric furnace for melting;

[0035] Step 3: Add spheroidizing inoculant during the smelting process, and pour the prepared sand mold after the spheroidizing inoculation time is satisfied. After cooling and forming, the casting of the required material is obtained.

[0036] Step 4: Attach the above-mentioned casting to the test bar for tensile properties. The average results are as ...

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Abstract

The invention relates to a support of an air suspension and special high-strength cast-state ductile iron of the support. The high-yield-strength cast-state ductile iron comprises chemical componentsincluding C, S, P, Mn, Si, Cr, Sn, Mg, Re and the balance Fe. The support comprises a support body, an air spring supporting face and a middle and rear axle thrust rod base, and the support is of an integral casting structure. Compared with the prior art, according to the cast-state performance, the tensile strength sigma b is larger than or equal to 600 MPa, sigma 0.2 is larger than or equal to 400 MPa, delta is larger than or equal to 10%, the brinell hardness HB is equal to 245-287, the content of a cast-state base body is 80%, the content of cementite is 1%, the yield strength is improved,and the material performance requirement of a structure bearing piece with the medium heavy truck fatigue resisting strength can be met. In addition, the support is of the integral casting structure,welding, forging, punching and other technologies are not needed, respective assembling is not needed neither, cost is greatly reduced, and time is greatly shortened; the effective strength is guaranteed, and meanwhile material stacking is reduced as well; and the space is more compact, the lightweight degree is higher, and the fuel economy of a whole vehicle can be better improved.

Description

technical field [0001] The invention belongs to the technical field of vehicle suspension, and relates to a function-integrated bracket of an air suspension and a special high-strength cast ductile iron material for the bracket. Background technique [0002] At present, the vehicle air suspension has the advantages of keeping the natural frequency of the body basically constant, ensuring the corresponding ground clearance, improving driving comfort, and maintaining a complete compression stroke and elongation stroke under various load conditions. The medium and heavy-duty truck companies in Europe, America and other countries have fully applied the air suspension system. The number of passenger cars and tractors in China, especially road tractors with air suspension systems, is also on the rise. [0003] In the prior art prior to the present invention, the vehicle air suspension on the market is usually connected with a thrust rod, an air spring, a height valve, and a shock...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/10C22C37/04B60G11/28
CPCB60G11/28C22C37/04C22C37/06C22C37/10
Inventor 张建振吴晓涛祝洪滨李跃伟龙少雄常连霞
Owner CHINA FIRST AUTOMOBILE
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