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Gradient nano-structure metal material and preparation method thereof

A technology of metal materials and nanostructures, which is applied in the field of precision processing, can solve the problems that the toughness and strength of metal materials cannot be improved at the same time, and achieve the effects of simple and easy to operate preparation methods, fulfilling use requirements, and great flexibility

Active Publication Date: 2021-06-01
SHENZHEN TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of this application is to provide a gradient nanostructure material and its preparation method, aiming to solve the problem that the processing methods in the prior art can only form a partial gradient nanostructure on the surface of the metal material, which leads to the inability to simultaneously improve the toughness and strength of the metal material The problem

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  • Gradient nano-structure metal material and preparation method thereof
  • Gradient nano-structure metal material and preparation method thereof
  • Gradient nano-structure metal material and preparation method thereof

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preparation example Construction

[0034] The first aspect of the embodiment of the present application provides a method for preparing a gradient nanostructure metal material, such as figure 1 shown, including the following steps:

[0035] S01. Provide n pieces of raw metal materials, and use the equal-diameter angular extrusion process to perform extrusion processing on the raw metal materials in different passes to obtain n pieces of metal materials with different grain sizes, wherein n is not less than 3;

[0036]S02. Cutting the n pieces of the metal material by a wire cutting process respectively, and performing impurity removal treatment, to obtain n pieces of metal material sheets with different grain sizes;

[0037] S03. Provide original metal material sheets, coarse-grained metal material sheets, and n pieces of said metal material sheets are sequentially stacked according to the size of the grain size, and the cumulative stack rolling welding process is used to sequentially stack rolling to prepare ...

Embodiment 1

[0071] Pure copper gradient nanostructure metal material and preparation method thereof

[0072] Preparation method of pure copper gradient nanostructure metal material

[0073] The preparation method of the pure copper gradient nanostructure metal material comprises the following steps:

[0074] Provide pure copper raw metal materials, wherein the raw material is selected from pure copper rods with a diameter of 15mm and an average grain size of about 7μm;

[0075] Three pieces of pure copper rods were extruded in 4 passes, 6 passes, and 8 passes respectively by using the equal diameter angular extrusion process to obtain 3 pieces of metal materials with different grain sizes; among them, extrusion The processing temperature is room temperature 25°C, the inner mold corner Φ where the channels intersect is 90°; the mold center angle Ψ where the channels intersect is 90° for equal radial extrusion treatment. Further, the average grain size of the pure copper material subjec...

Embodiment 2

[0083] 6061 aluminum alloy gradient nanostructure metal material and preparation method thereof

[0084] Preparation method of 6061 aluminum alloy gradient nanostructure metal material

[0085] The preparation method of the 6061 aluminum alloy gradient nanostructure metal material comprises the following steps:

[0086] Provide 6061 aluminum alloy raw metal materials, wherein the raw materials are selected from pure copper rods with a diameter of 15mm and an average grain size of about 7μm;

[0087] Three pieces of 6061 aluminum alloy bars were extruded for 4 passes, 6 passes, and 8 passes respectively by using the equal-diameter angular extrusion process to obtain 3 pieces of metal materials with different grain sizes; among them, extrusion The temperature of the press treatment is room temperature 25°C, the corner Φ of the inner mold where the channels intersect is 90°; the central angle Ψ of the mold where the channels intersect is 90°, and the equal radial angle extrusi...

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Abstract

The invention relates to the technical field of precision machining, and provides a preparation method of a gradient nano-structure metal material. The preparation method comprises the following steps: providing n original metal materials, and carrying out extrusion treatment of different passes on the original metal materials respectively through an equal channel angular extrusion process to obtain n metal materials with different grain sizes; cutting the n metal materials through a linear cutting process, and carrying out impurity removal treatment to obtain n metal material sheets with different grain sizes; providing the original metal material sheets and coarse-grain metal material sheets, and sequentially stacking the original metal material sheets, the coarse-grain metal material sheets and the n metal material sheets according to the grain sizes, and sequentially carrying out ply rolling treatment on the original metal material sheets, the coarse-grain metal material sheets and the n metal material sheets through an accumulation ply rolling welding process to prepare the gradient nano-structure metal material. The preparation method is simple and convenient, and flexibility is high, so that the obtained gradient nano-structure metal material can ensure high material strength and material toughness simultaneously.

Description

technical field [0001] The application belongs to the technical field of precision machining, and in particular relates to a gradient nanostructure metal material and a preparation method thereof. Background technique [0002] The performance of metal materials determines the scope of application of materials and the rationality of applications. The properties of metal materials are mainly divided into four aspects, namely: mechanical properties, chemical properties, physical properties, and process properties. Based on the excellent performance of the four aspects of metal materials, its application fields are becoming more and more extensive. However, a large number of studies have shown that when the internal grain size of the metal material is reduced and the material strength is enhanced, the toughness of the material will be greatly reduced. Wide range of applications of materials. [0003] Usually one of the strategies to improve the toughness of materials is to ch...

Claims

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Application Information

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IPC IPC(8): B23P15/00C21D7/02C22F1/00C22F1/04C22F1/08
CPCB23P15/00C21D7/02C22F1/00C22F1/04C22F1/08
Inventor 陆建勋程涛伍博伍晓宇李岱阮双琛
Owner SHENZHEN TECH UNIV
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