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High-strength cast aluminum-silicon alloy material and application thereof to hydraulic shell

A technology of casting aluminum-silicon alloy and hydraulic housing, which is applied to casting aluminum alloy materials and its application fields in automobiles, aviation and aerospace, and can solve the problems that A356 materials cannot meet the technical requirements.

Inactive Publication Date: 2013-09-04
上海嘉朗实业有限公司
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0003] General automobiles use A356 material to make hydraulic housings, and the performance can only reach a tensile strength of 200Mpa.
However, foreign (Russian) products are tested for tensile properties at room temperature, Rm=240MPa, Rp0.2=234MPa, A=0.68%, so A356 materials cannot meet foreign technical requirements

Method used

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  • High-strength cast aluminum-silicon alloy material and application thereof to hydraulic shell
  • High-strength cast aluminum-silicon alloy material and application thereof to hydraulic shell
  • High-strength cast aluminum-silicon alloy material and application thereof to hydraulic shell

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Embodiment 2）

[0037] The hydraulic casing made of this high-strength cast aluminum-silicon alloy (as in Example 2) must be tested in the following aspects:

[0038] 1. Metallographic structure ( Figure 1-3 )

[0039] From the microstructure point of view, no overburned triangles or grain boundary melting, remelted balls, and remelted eutectic structures were found, indicating that the organization was normal, and no overheated or overheated structures were found. From the perspective of thick wall and thin wall metallographic structure, the eutectic silicon is small, the corners of eutectic silicon are smooth, distributed along the dendrite network, the organization is evenly distributed, and the dendrite network is basically evenly distributed.

[0040] 2. Performance test

[0041] 2.1 Tensile and hardness tests at room temperature

[0042] The product was sampled for testing, and the test results are shown in the table below:

[0043]

[0044] 2.2 High temperature tensile test

...

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Abstract

The invention relates to a high-strength cast aluminum-silicon alloy material and application thereof to a hydraulic shell. The alloy material comprises the following chemical components: 6.0 to 8.0 percent of Si, 0.2 percent of Fe, 0.3 to 0.6 percent of Cu, 0.2 percent of Mn, 0.55 to 0.75 percent of Mg, 0.2 percent of Zn, 0.1 to 0.2 percent of Ti, 0.01 to 0.02 percent of Sr and the balance of Al. according to the application of the alloy material to the files of automobiles, aviation and aerospace, the invention comprises: (1) according to the alloy material, the components are smelted and proportioned, and refined to remove gas to form a melt; (2) a casting process; and (3) a heat treatment process. Based on the alloy material and the heat treatment process, products can meet the using performance requirements.

Description

technical field [0001] The invention relates to a cast aluminum alloy material and its application in automobiles, aviation and aerospace, in particular to a high-strength cast aluminum-silicon alloy material and its application in hydraulic housings. Background technique [0002] With the needs of large-scale, complex, corrosion-resistant, high-temperature-resistant and high-performance aluminum castings in modern engineering, it is very necessary to research and develop new aluminum-silicon alloys. In particular, aluminum castings are widely used in aviation and aerospace fields, and are used for products with large volume and complex shapes. An aviation hydraulic factory used existing materials to make hydraulic shells and run-in tests during assembly and test runs. After 6 hours of testing, the high-pressure zone broke. The interior of the product met the Ministry of Aviation's Class 2 standard through X-ray flaw detection and fluorescent flaw detection, and was airtight...

Claims

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Application Information

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IPC IPC(8): C22C21/02B22D21/04C21D1/18C22F1/043
Inventor 李盾
Owner 上海嘉朗实业有限公司
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