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
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[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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