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A preparation method of multi-scale precipitation heterogeneous layered structure aluminum alloy

An aluminum alloy, multi-scale technology, applied in the direction of heat exchange equipment, stators, transmissions, etc., can solve the problems of small sample size, poor heat resistance, high requirements for equipment and molds, and achieve the effect of controllable layer thickness

Active Publication Date: 2022-01-14
NANJING UNIV OF SCI & TECH
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Problems solved by technology

However, there are the following problems in this technology: (1) It is difficult to control the oxidation of the interface; (2) The sample size obtained by high-pressure torsion is too small, and the requirements for equipment and molds are very high;
However, the mixed crystal material prepared in this way has a single component and poor heat resistance

Method used

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  • A preparation method of multi-scale precipitation heterogeneous layered structure aluminum alloy
  • A preparation method of multi-scale precipitation heterogeneous layered structure aluminum alloy
  • A preparation method of multi-scale precipitation heterogeneous layered structure aluminum alloy

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Embodiment 1

[0022] The following is a detailed description of the embodiments of the present invention. This embodiment is implemented on the premise of the technical solution of the present invention, and provides detailed implementation methods and specific operation processes. Such as Figure 1~4 As shown, according to the melting points of various aluminum alloys, industrial pure aluminum with a higher melting point is selected as the solid material, and 7075 aluminum alloy with a lower melting point is used as the liquid material. The specific operation involves the following three steps: pretreatment, casting, multi-scale precipitation, in:

[0023] (1) Pretreatment: such as figure 1 As shown, the surface of the solid pure aluminum sheet is chemically cleaned to remove oil and oxides on the surface, and then the surface is galvanized. The galvanized layer is electroplated, and the thickness of the zinc layer is 30 μm. The treated pure aluminum is preset in the cavity of the mold 1...

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Abstract

The invention provides a method for preparing a multi-scale precipitation heterogeneous layered structure aluminum alloy material, including: pretreatment, casting and multi-scale precipitation, etc., selecting two or more aluminum alloys with different age hardening behaviors, and solidifying Liquid inlay casting to form a multi-layer composite aluminum alloy block. Then, through rolling and subsequent aging treatment, multi-scale precipitates are formed between different layers, and a multi-scale precipitated heterogeneous layered structure aluminum alloy material is obtained.

Description

technical field [0001] The present invention relates to a method for preparing aluminum alloys with a multi-scale precipitation lamellar structure, specifically a method for preparing an aluminum alloy with a solid-liquid combination of two or more aluminum alloys with different precipitation strengthening effects by using an inlaid casting technology, and for the obtained The lamellar structure materials are subjected to aging treatment, and the different precipitation strengthening effects of aluminum alloys are used to obtain the technology of multi-scale precipitation of heterogeneous layered structure aluminum alloys. Background technique [0002] Compared with other metal materials, aluminum alloy has many excellent characteristics, such as low density, only 2.7g / cm 3 , about 1 / 3 of copper or steel; good corrosion resistance and weather resistance; good plasticity and processing properties. Therefore, aluminum alloys have been widely used in aviation, aerospace, autom...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D19/00C22F1/04
CPCB22D19/0081C22F1/04
Inventor 高波周浩陈雪飞潘志驿李玉胜曹阳聂金凤
Owner NANJING UNIV OF SCI & TECH
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