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Heat treatment process of aluminium wheels

A wheel and process technology, which is applied in the field of heat treatment of aluminum wheels, can solve problems such as high strength, high degree of lattice distortion, and deformation of parts, and achieve the effect of high comprehensive performance and small deformation of parts

Inactive Publication Date: 2014-04-30
CITIC DICASTAL
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  • Application Information

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Problems solved by technology

Because water quenching is generally used for quenching, the deformation of parts is serious, and because of the high degree of lattice distortion during quenching, after aging, the strength is high and the elongation is low

Method used

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  • Heat treatment process of aluminium wheels
  • Heat treatment process of aluminium wheels
  • Heat treatment process of aluminium wheels

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Embodiment Construction

[0015] In order to better understand the technical features of the present invention, the present invention will be further described below in conjunction with the examples. It should be noted that the examples are not intended to limit the protection scope of the present invention.

[0016] Prepare 6 ZL101A cast aluminum alloy wheels, and measure the end face deformation and rim depth of each wheel in the as-cast state. Take 3 of the wheels for normal T6 heat treatment. The heat treatment adopts a materialless frame heat treatment furnace with a solid solution temperature of 540°C and a time of 280 minutes. The quenching medium is water quenching, the quenching water temperature is 80°C, the quenching time is 180s, the quenching transfer time is 20s, the aging temperature is 155°C, and the time is 200 minutes. The temperature fluctuation range of solid solution, quenching and aging is controlled within ±5°C, the heating time of the workpiece in the solid solution furnace is 4...

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Abstract

The invention discloses a heat treatment process of aluminium wheels. The process comprises the following steps: putting an as-cast blank in a solution treatment furnace, heating and carrying out solution treatment at the temperature of 530-550 DEG C, holding the temperature for 240-300 minutes, taking out of the solution treatment furnace, putting in a salt bath furnace, carrying out high temperature nitrate bath quenching treatment at the temperature of 150-170 DEG C, taking out of the salt bath furnace, cooling in an air medium and removing the salt membrane, wherein the holding time of the aging treatment is 150-200 minutes. According to the invention, the T6 heat treatment process and the salt bath quenching process are organically combined to achieve the purpose of low deformation and high performance number. Compared with the standard T6 heat treatment process, the process disclosed by the invention has the advantages that high elongation rate and low deformation degree can be obtained while high strength is obtained at the same time; the alloy microstructure is guaranteed to achieve an ideal state of the standard T6 treatment.

Description

technical field [0001] The invention relates to a heat treatment method for cast AlSi7Mg alloy, especially a heat treatment process for aluminum wheels. The method can achieve uniform transformation of the structure while meeting the heat treatment T6 temperature, so that the aluminum alloy wheel hub has high strength and high performance. shaping and minor deformation. Background technique [0002] AlSi7Mg alloy is widely used in low-pressure casting aluminum alloy wheels. In order to meet the various mechanical performance requirements of the alloy materials of the automobile hub, an important process is to implement T6 heat treatment. Because water quenching is generally used for quenching, the deformation of parts is serious, and because of the high degree of lattice distortion during quenching, the strength after aging is high and the elongation is low. It is of great significance to research and develop a heat treatment process with both high comprehensive performanc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/04
Inventor 邢东刘利华李昌海杜德喜王永宁朱志华
Owner CITIC DICASTAL