Heat treatment process of aluminum wheels
A wheel and process technology, which is applied in the field of heat treatment process of aluminum wheels, can solve the problems of high degree of lattice distortion, high strength, low elongation, etc., and achieve the effect of small deformation of parts and high comprehensive performance
Inactive Publication Date: 2016-07-13
QINGDAO QINDE RIGGING HARDWARE
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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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Embodiment Construction
[0010] In order to better understand the technical characteristics 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.
[0011] 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 furna...
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The invention discloses a heat treatment process of aluminum wheels. The process comprises the following steps: putting an as-cast blank into a solid solution treatment furnace and heating up, carrying out solid solution treatment at a solid solution temperature, carrying out high-temperature salt bath quenching treatment after discharging out of the solid solution treatment furnace, cooling in an air medium after discharging out of a salt bath furnace, and removing a salt film. The temperature of the solid solution treatment is 530-550 DEG C, and the heat preservation temperature of the solid solution treatment is 240-300 minutes; nitrate bath is adopted, the temperature of the salt bath treatment is 150-170 DEG C, and the heat preservation time of aging treatment is 150-200 minutes. The T6 heat treatment process and the salt bath quenching process are organically combined to achieve the purposes of low deformation and high performance number. Compared with a standard T6 heat treatment process, the process disclosed by the invention has the advantages that relatively high elongation rate and relatively low deformation degree can be obtained while relatively high strength is obtained; 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 alloy materials for automobile wheels, 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 performance an...
Claims
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IPC IPC(8): C22F1/043
Inventor 范勤德
Owner QINGDAO QINDE RIGGING HARDWARE