Heat treatment process of aluminum alloy components, aluminum alloy components and 3D printing method

An aluminum alloy component and heat treatment technology, applied in the field of material processing, can solve the problems of loss of precipitation phase dispersion strengthening, low level of plasticity and toughness, reduced mechanical strength of materials, etc. Effect

Active Publication Date: 2020-01-07
北京星驰恒动科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the defects in the heat treatment method of the existing additive manufacturing Al-Si series aluminum alloy components are: 1) In order to retain the mechanical strength strengthening effect brought by the rapid solidification of the additive manufacturing Al-Si series aluminum alloy components to the greatest extent, use Although the lower annealing temperature inhibits the growth of the matrix Si phase, it also inhibits the recovery process of the aluminum alloy, so that the internal residual stress of the material is less eliminated, and the level of plasticity and toughness is low; 2) In order to obtain a better effect of stress relief, Using a higher annealing temperature causes the rapid growth of the Si phase in the material, thus losing the effect of the original precipitation phase dispersion strengthening, and greatly reducing the mechanical strength of the material.

Method used

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  • Heat treatment process of aluminum alloy components, aluminum alloy components and 3D printing method
  • Heat treatment process of aluminum alloy components, aluminum alloy components and 3D printing method
  • Heat treatment process of aluminum alloy components, aluminum alloy components and 3D printing method

Examples

Experimental program
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Effect test

Embodiment 1

[0037] A heat treatment process for an aluminum-silicon-based aluminum alloy component manufactured by additive manufacturing. The grade of the aluminum alloy component is AlSi10Mg, such as figure 1 As shown, the heat treatment process includes the following steps:

[0038] (1) Put the components into an air heat treatment furnace, and heat them to heat up the components to the stress relief treatment temperature, and control the heating rate to 4°C / min;

[0039] (2) Control the stress relief treatment temperature to be 160°C, keep warm for 130min, and complete the stress relief treatment;

[0040] (3) Continue to heat the component that has completed the stress relief treatment in the air heat treatment furnace, so that the temperature of the component is raised to the temperature of the plasticizing and toughening treatment, and the heating rate is controlled to be 5°C / min;

[0041] (4) Control the plastic-toughening treatment temperature to 270°C, keep warm for 45 minutes,...

Embodiment 2

[0052] A heat treatment process for additively manufactured aluminum-silicon-based aluminum alloy components. The grade of the aluminum alloy component is AlSi7Mg, which is processed into components by 3D printing. The specific method of 3D printing is realized according to the existing technology, such as image 3 As shown, the heat treatment process includes the following steps:

[0053] (1) Put the component into an air heat treatment furnace and heat it to heat up the component to the stress relief treatment temperature, and control the heating rate to 5°C / min;

[0054] (2) Control the stress relief treatment temperature to be 180°C, heat for 120 minutes, and complete the stress relief treatment;

[0055] (3) Continue to heat the component that has completed the stress relief treatment in the air heat treatment furnace, so that the temperature of the component is raised to the temperature of the plasticizing and toughening treatment, and the heating rate is controlled to b...

Embodiment 3

[0060] A heat treatment process for an aluminum-silicon-based aluminum alloy component manufactured by additive manufacturing. The grade of the aluminum alloy component is AlSi12Mg, which is processed into a component by 3D printing. The specific method of 3D printing is realized according to the existing technology, such as Figure 4 As shown, the heat treatment process includes the following steps:

[0061] (1) Put the component into an air heat treatment furnace and perform heat treatment to raise the temperature of the component to the stress relief treatment temperature, and control the heating rate to 4.5°C / min;

[0062] (2) Control the stress relief treatment temperature to be 170°C, keep the heat for 150min, and complete the stress relief treatment;

[0063] (3) Continue to heat the component that has completed the stress relief treatment in the air heat treatment furnace, so that the temperature of the component is raised to the temperature of the plasticizing and tou...

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Abstract

The invention relates to the technical field of material machining, and specifically relates to a heat treatment process of an aluminum-silicon aluminum alloy component of additive manufacturing, an aluminum alloy component and a 3D printing method. The process comprises the following steps that heating treatment is carried out on the component, and heating is carried out to a stress relief treatment temperature; and the stress relief treatment temperature is controlled to be 160-180 DEG C, and heat preservation is kept for 120-150 minutes; the heating treatment is continued, the component isheated to a de-plasticizing toughening treatment temperature; a plastic toughening treatment temperature is controlled to be 260-300 DEG C, and the heat preservation is kept for 30-50 minutes; and cooling is carried out. The residual stress of a component material is removed by the stress relief treatment, meanwhile, the cores of the Si phase particles are more formed in a material matrix, the number of the Si phase particles is increased, and the rapid growth of the Si phase is inhibited; the strengthening effect brought by rapid solidification when the component material is printed and formed through the plastic toughening treatment, the plastic toughness of the material is improved, meanwhile, a high-temperature short-time treatment mode enables the cores of the Si phase formed in an earlier stage only generates a small amount of growth, so that the residual stress of a treated part is small, and the plastic toughness is improved.

Description

technical field [0001] The present application relates to the technical field of material processing, specifically, to a heat treatment process of an aluminum-silicon-based aluminum alloy component manufactured by additive manufacturing, to an aluminum alloy component, and to a 3D printing method for an aluminum alloy component. Background technique [0002] Al-Si aluminum alloys are the most widely used materials in the field of metal additive manufacturing, and are used in the manufacture of metal structural parts in aerospace, medical, machinery and other fields. However, due to the large stress, poor plasticity and toughness of the aluminum alloy components manufactured by additive materials, they cannot be used directly. The residual stress inside the material must be eliminated by heat treatment, and the shape and distribution of the secondary precipitated phase of the aluminum alloy matrix must be controlled. In order to improve the plasticity and toughness of parts, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/043B33Y40/00
Inventor 苗伟蒋疆樊勇杨三强邓明鲁王慧如李群陈嘉琦孟伟杰
Owner 北京星驰恒动科技发展有限公司
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