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Method for removing ultra-deep cold stress of aluminum alloy

An aluminum alloy and stress technology, which is applied in the field of aluminum alloy processing, can solve the problems of low residual stress removal rate of aluminum alloy parts, unsatisfactory users, unsatisfactory realization effect, etc., and achieve the effect of improving quality and quality

Pending Publication Date: 2022-06-24
苏州镭翼精工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The patent application number is CN 202011589530.6 "a method for stress relief of thin-walled aluminum alloy castings". heat treatment stress, and at the same time maintain the mechanical properties of castings after solution treatment; also ensure the stability of parts precision.” Although the above-mentioned patent can remove stress from aluminum alloy parts, it uses vibration to remove stress, and the effect is not as good as Not ideal, the residual stress removal rate for aluminum alloy parts is not high, and cannot meet the needs of users

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  • Method for removing ultra-deep cold stress of aluminum alloy

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Embodiment 1

[0027] The invention provides a method for removing ultra-cryogenic stress of aluminum alloy, comprising the following steps:

[0028] (1) Take the aluminum alloy parts containing residual stress, and place the aluminum alloy parts in a heating furnace for heating and heat preservation.

[0029] Further, placing the aluminum alloy part in a heating furnace for heating and heat preservation treatment is to heat the aluminum alloy part to 360° C., hold the temperature for 10 minutes, and then heat it to 500° C. for 20 minutes.

[0030] (2) Quenching the aluminum alloy piece treated in step (1) into still water for water quenching treatment.

[0031] Further, the temperature of the still water was 25°C.

[0032] (3) The aluminum alloy parts after water quenching are cooled twice with liquid nitrogen.

[0033] Further, the two cooling with liquid nitrogen is to first use liquid nitrogen at -90°C to cool the aluminum alloy parts for 20 minutes, and then use liquid nitrogen at -19...

Embodiment 2

[0042] The invention provides a method for removing ultra-cryogenic stress of aluminum alloy, comprising the following steps:

[0043] (1) Take the aluminum alloy parts containing residual stress, and place the aluminum alloy parts in a heating furnace for heating and heat preservation.

[0044] Further, placing the aluminum alloy part in a heating furnace for heating and heat preservation treatment is to heat the aluminum alloy part to 360° C., hold the temperature for 15 minutes, and then heat it to 500° C. and hold the temperature for 25 minutes.

[0045] (2) Quenching the aluminum alloy piece treated in step (1) into still water for water quenching treatment.

[0046] Further, the temperature of the still water was 25°C.

[0047] (3) The aluminum alloy parts after water quenching are cooled twice with liquid nitrogen.

[0048] Further, two cooling with liquid nitrogen is to first use -90 ℃ liquid nitrogen to cool the aluminum alloy parts for 25 minutes, and then use -196...

Embodiment 3

[0057] The invention provides a method for removing ultra-cryogenic stress of aluminum alloy, comprising the following steps:

[0058] (1) Take the aluminum alloy parts containing residual stress, and place the aluminum alloy parts in a heating furnace for heating and heat preservation.

[0059] Further, placing the aluminum alloy parts in a heating furnace for heating and heat preservation treatment is to heat the aluminum alloy parts to 360° C., hold the temperature for 20 minutes, and then heat the aluminum alloy parts to 500° C. for 30 minutes.

[0060] (2) Quenching the aluminum alloy piece treated in step (1) into still water for water quenching treatment.

[0061] Further, the temperature of the still water was 25°C.

[0062] (3) The aluminum alloy parts after water quenching are cooled twice with liquid nitrogen.

[0063] Further, two cooling with liquid nitrogen is to first use -90 ℃ liquid nitrogen to cool the aluminum alloy parts for 30 minutes, and then use -196 ...

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Abstract

The invention relates to the technical field of aluminum alloy machining, in particular to an aluminum alloy ultra-deep cold stress removing method. According to the method, the aluminum alloy part is heated twice, then subjected to water quenching treatment and liquid nitrogen cooling, and finally subjected to quenching treatment after multiple times of repeating, so that stress of the treated aluminum alloy part can be effectively removed, and the quality of the aluminum alloy part is improved.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy processing, in particular to an aluminum alloy ultra-cryogenic stress removal method. Background technique [0002] Aluminum alloy is an alloy based on aluminum with a certain amount of other alloying elements added, and it is one of the light metal materials. In the processing of aluminum alloy parts, residual stress is a very important factor, which will affect the aluminum alloy parts from beginning to end. Impact. Under the action of the continuously released residual stress, the processed parts are very likely to have secondary deformation, which is fatal to the high-precision thin-walled parts that have been processed. Therefore, it is necessary to remove the residual stress of machining aluminum alloy parts. [0003] The patent application number is CN 202011589530.6 for "a method for stress removal of thin-walled aluminum alloy castings", which is described in the description as ...

Claims

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Application Information

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IPC IPC(8): C22F1/04
CPCC22F1/04C22F1/002
Inventor 孙志国
Owner 苏州镭翼精工科技有限公司
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