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Heat treatment method for regulating and controlling residual stress of aluminum-based composite material/aluminum alloy

A heat treatment method and aluminum-based composite material technology, which is applied in the field of regulating aluminum-based composite material/aluminum alloy residual stress treatment, can solve the problem of reducing fluidity, increasing dynamic viscosity, and not realizing deep cooling and rapid heat treatment of materials in a real sense. problem, to achieve high efficiency and simple process

Active Publication Date: 2021-11-09
AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In fact, since the ultra-low temperature aluminum alloy / aluminum matrix composite material enters the high temperature liquid environment, it will absorb a large amount of heat energy instantaneously, reduce the temperature of the liquid around the material, increase its dynamic viscosity (reduce fluidity), etc., the surface heat transfer of the low temperature material depends on the near The temperature and flow rate of the medium on the surface of the material do not depend on the temperature of the remote medium, so the above method does not realize the deep cooling and rapid heat treatment of the material in the true sense

Method used

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  • Heat treatment method for regulating and controlling residual stress of aluminum-based composite material/aluminum alloy
  • Heat treatment method for regulating and controlling residual stress of aluminum-based composite material/aluminum alloy
  • Heat treatment method for regulating and controlling residual stress of aluminum-based composite material/aluminum alloy

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Embodiment 1

[0065] In this embodiment, silicon carbide particle-reinforced aluminum-based composite material (15% SiCp / 2009Al) is used as a sample to carry out the solid solution water fire + deep cooling and rapid thermal cycle treatment in the above embodiment of the present invention. The specific steps are:

[0066] 1) The silicon carbide particle reinforced aluminum matrix composite material (15%SiCp / 2009Al) with a thickness of 80mm was raised to 515±5°C for solution treatment, with an average heating rate of 5°C / min, kept for 4 hours, and water quenched.

[0067] 2) After blowing and drying, spray dark graphite evenly on the material. The drying + spraying process takes about 20 minutes, and then put it into a low-temperature freezer (about 0°C) for storage and transfer.

[0068] 3) Take the material out of the freezer and put it directly into the liquid nitrogen tank, store it for 5 minutes, take it out and quickly put it into the high-temperature circulating boiling water of the ab...

Embodiment 2

[0072] In this example, 2024 aluminum alloy is used as a sample for solid solution water quenching + deep cooling and rapid thermal cycle treatment. The specific steps are:

[0073] 1) Heat the 2024 aluminum alloy with a thickness of 80mm to 495±5°C for solution treatment, with an average heating rate of 20°C / min, keep it warm for 4 hours, and then quench it in water.

[0074] 2) After wiping and drying with blower, spray dark graphite evenly on the material. The drying + spraying process takes about 20 minutes, and then put it into a low-temperature freezer (about -20°C), store and transfer.

[0075] 3) Take the material out of the freezer and put it directly into a liquid nitrogen tank, store it for 30 minutes, take it out and quickly put it into the high-temperature circulating boiling water of the above-mentioned circulating fast heating device, the above-mentioned circulating fast heating device equipped with high-temperature circulating boiling water and the embodiment T...

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Abstract

The invention relates to a heat treatment method for regulating and controlling residual stress of an aluminum-based composite material / aluminum alloy. The heat treatment method comprises the following steps that the aluminum-based composite material / aluminum alloy is uniformly heated to a solid solution temperature, and water quenching treatment is performed after solute elements are completely dissolved into an aluminum matrix; after subjected to water quenching treatment, materials are cooled to the water temperature, taken out, dried and placed in an ultralow-temperature environment, and heat preservation continues for a short time after the materials are completely cooled to the ultralow-temperature environment temperature; the materials are taken out, quickly put into a circulating high-temperature liquid medium, then taken out and subjected to room-temperature water cooling treatment, and the materials are taken out to be dried after cooling to the water temperature; and the materials are put into a deep cooling box to be slowly cooled to the ultralow-temperature medium temperature (lower than -190 DEG C, such as liquid nitrogen and liquid helium), after the materials are completely cooled to the target temperature, the materials are stored for a short time and then taken out, treatment in the third step is conducted immediately, and the residual stress of the aluminum-based composite material / aluminum alloy materials can be regulated and controlled to be eliminated. By means of the heat treatment method, the quenching structure of the materials is preserved to the maximum extent, secondary phase precipitation is basically avoided, and the quenching residual stress of the material can be effectively regulated and controlled.

Description

technical field [0001] The invention relates to the technical field of regulating and controlling the residual stress of an aluminum-based composite material / aluminum alloy, in particular to a heat treatment method for regulating and controlling the residual stress of an aluminum-based composite material / aluminum alloy. Background technique [0002] As a typical light metal material, aluminum-based composites have the advantages of low density, high specific strength, good thermal conductivity, easy machining, and high specific elastic modulus. At present, they gradually replace some aluminum alloys and titanium alloys and develop into aviation An important material for the key load-bearing complex components of aerospace. With the development of automobile industry and aerospace technology, related manufacturing fields show the development trend of integral forming, net near forming and precision forming. In the field of aerospace, the performance requirements for aluminum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/04
CPCC22F1/04C22F1/002
Inventor 潘冉曾元松刘宝胜陈福龙吴为
Owner AVIC BEIJING AERONAUTICAL MFG TECH RES INST