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Aluminum alloy high and low temperature stress relief aging method

An aging method and high and low temperature technology, applied in the field of high and low temperature stress relief aging of aluminum alloys, can solve the problems of lack of military equipment, shortened manufacturing cycle, product deformation size, etc., and achieve good product dimensional stability, shortened production cycle, and high precision. Effect

Active Publication Date: 2014-02-05
苏州市新鸿基精密部品有限公司
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the actual processing process, because the raw material manufacturer shortens the manufacturing cycle or does not fully follow the manufacturing process, the internal stress of the material is released after the machining manufacturer's precision machining, resulting in product deformation and resulting in a size out of tolerance
General mechanical processing factories consider shortening product delivery time and adding artificial aging process after rough machining. Artificial aging process is barely suitable for general precision or product use conditions that are not harsh, but it is lacking for high-demand military equipment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] After rough machining of aluminum alloy rods, plates or casting blanks, enter the high and low temperature aging process, the steps:

[0019] 1) Preheat the high-temperature furnace to 170-190°C in advance, and then put the aluminum alloy product into the high-temperature furnace for 2-4 hours;

[0020] 2) Preheat the high-temperature furnace to 140-160°C in advance, and then put the aluminum alloy product into the high-temperature furnace for 0.5-1.5 hours;

[0021] 3) Pre-cool the low temperature furnace to -50~-60°C in advance, then transfer the aluminum alloy product from the high temperature furnace to the low temperature furnace within 40 seconds, and keep it warm for 0.5~1.5 hours;

[0022] 4) Repeat step 2) and step 3) for a total of 2 to 4 times, and then perform precision machining.

[0023] The best aging process is:

[0024] 1) Preheat the high-temperature furnace to 180°C in advance, and then put the aluminum alloy product into the high-temperature furnac...

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PUM

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Abstract

The invention provides an aluminum alloy high and low temperature stress relief aging method, comprising the following process steps: 1) a high temperature furnace is preheated to reach 170 DEG C-190 DEG C in advance, and then an aluminum alloy product is placed in the high temperature furnace to be subjected to heat preservation for 2-4 hours; 2) the high temperature furnace is preheated to reach 140 DEG C-160 DEG C in advance, and then the aluminum alloy product is placed in the high temperature furnace to be subjected to heat preservation for 0.5-1.5 hours; 3) a low temperature furnace is pre-cooled to reach minus 50- minus 60 DEG C, and then the aluminum alloy product is transferred to the low temperature from the high temperature furnace in 40 seconds and is subjected to heat preservation for 0.5-1.5 hours; and 4) the step 2) and the step 3) are sequentially and repeatedly performed for 2-4 times. According to the method, the high temperature furnace and the low temperature furnace are adopted for aging process treatment, precision machining size is stable after treatment, the high-precision size requirement which is higher than 0.005 mm can be met, and the manufacturing requirements which cannot be achieved by common processes are realized; the production cycle is shortened, and the product size stability is good and the precision is very high after precision machining.

Description

technical field [0001] The invention relates to an aluminum alloy high and low temperature stress relief aging method. Background technique [0002] For the manufacture of aerospace thin-walled parts, the common process is: raw material (rod, plate or casting) - rough machining - natural aging - finishing. [0003] In the actual processing process, because the raw material manufacturer shortens the manufacturing cycle or does not fully follow the manufacturing process, the internal stress of the material is released after the precision machining by the machining manufacturer, causing the product to deform and make the size out of tolerance. General mechanical processing factories consider shortening product delivery time and adding artificial aging process after rough machining. Artificial aging process is barely suitable for general precision or product use conditions that are not harsh, but it is lacking for high-demand military equipment. Contents of the invention [0...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/04
Inventor 李坚
Owner 苏州市新鸿基精密部品有限公司