A kind of method for preparing bulk nanocrystalline alloy material

A technology for nanocrystalline alloys and nanocrystalline materials is applied in the field of preparing bulk nanocrystalline alloy materials by using cold pressure welding technology, and can solve the problems of difficulty in preparing nanometer metals and alloy solids, difficulty in obtaining metal amorphous, and limited application scope, etc. Achieve low cost, prevent nanocrystal growth, and high efficiency

Active Publication Date: 2016-08-17
昊石新材料科技南通有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In order to prevent oxidation, the above steps are generally carried out in a vacuum, which brings great difficulties to the preparation of nano-metal and alloy solids; the amorphous crystallization method is widely used in recent years to prepare nano-metal bulk materials A method of this method, the key of this method is how to form metal amorphous and then obtain nanocrystalline material or nanocomposite material through controllable heat treatment method, but because it is difficult to obtain metal amorphous, the scope of application of this method is limited; The plastic deformation method (Severe plastic deformation, SPD) is to plastically deform the material at room temperature or relatively low temperature. When the deformation is large enough, ultra-fine-grained materials can be obtained. However, so far, there is no effective method. Method to prepare dense bulk nanocrystalline alloy materials

Method used

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  • A kind of method for preparing bulk nanocrystalline alloy material
  • A kind of method for preparing bulk nanocrystalline alloy material

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Embodiment 1

[0019] This embodiment specifically implements a method for preparing bulk nanocrystalline aluminum alloy, wherein the aluminum alloy used is 7055, and the thickness of the desired nanocrystalline material is 10mm; the nanocrystalline 7055 aluminum alloy strip prepared by the melt rotation method Place it horizontally on the 7055 aluminum alloy material with a thickness of 5mm and a length and width of 20mm. The surface of the block alloy is flat and has been degreased and derusted in advance. The punch pressurizes cold welding, one welding spot follows the previous welding spot until the base material is fully welded; the positioning mold is made of die steel, the inner hole size section is 0.5mm×0.5mm, the height is 2.5mm, and the pre-loading pressure It is 40MPa; the cold punch is made of die steel, the end face size is 0.5mm×0.5mm, and the height is 3.0mm; the loading stress of pressurized cold welding is 2300MPa, and the loading duration is 0.5s; The position of the solde...

Embodiment 2

[0021] This embodiment specifically implements a method for preparing bulk nanocrystalline aluminum alloy, wherein the aluminum alloy used is 6061, and the thickness of the desired nanocrystalline material is 15mm; the nanocrystalline 6061 alloy strip prepared by the melt rotation method is horizontally Placed on the 6061 aluminum alloy material with a thickness of 10mm and a length and width of 25mm each. The surface of the block alloy is flat and has been degreased and derusted in advance. Pressure cold welding, one welding point follows the previous welding point until the block material is fully welded. Among them, the positioning die is made of die steel, the size of the inner hole is 2.0mm×2.0mm, the height is 4.0mm, and the preloading pressure is 50MPa; the cold punch is made of die steel, the end surface size is 2.0mm×2.0mm, the height 5.0mm; the loading stress of pressurized cold welding is 2000MPa, and the loading duration is 1.5s; the position of the last solder joi...

Embodiment 3

[0023] The present embodiment specifically implements a method for preparing bulk nanocrystalline titanium alloy, wherein the titanium alloy used is Ti6Al4V, and the thickness of the nanocrystalline material desired to be obtained is 12 mm; the nanocrystalline Ti6Al4V titanium alloy strip prepared by the melt rotation method Place it horizontally on the Ti6Al4V titanium alloy material with a thickness of 6mm and a length and width of 20mm each. The surface of the block alloy is flat and has been degreased and derusted in advance. Pressurized cold welding, one welding spot followed by the previous welding spot until the base material is fully welded; among them, the positioning mold is made of die steel, the inner hole size section is 1.0mm×1.0mm, the height is 3.5mm, and the pre-loading pressure 30MPa; the cold punch is made of die steel, the end face size is 1.0mm×1.0mm, and the height is 4.0mm; the loading stress of pressurized cold welding is 2500MPa, and the loading duratio...

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Abstract

The invention relates to nanocrystalline alloys, in particular to a method for preparing bulk nanocrystalline alloy materials using cold pressure welding technology. The present invention utilizes the property that the strip-shaped or flake-shaped alloy material is combined with the base material through severe plastic deformation cold welding under huge pressure, and cold-welds the strip-shaped nanocrystalline alloy material into a block material. Due to the cold pressure welding process There is no obvious temperature rise phenomenon, so the grains of the finally obtained bulk material will not be significantly different from the original strips, that is, they are still nanocrystalline.

Description

technical field [0001] The invention relates to nanocrystalline alloys, in particular to a method for preparing bulk nanocrystalline alloy materials using cold pressure welding technology. Background technique [0002] According to the Hall-Patch relationship, the strength of metal materials is inversely proportional to the grain size of the material, and grain refinement is one of the effective methods to improve the strength of structural materials; at the same time, the plasticity and toughness of the material after grain refinement, and even physical The performance has been greatly improved; therefore, without changing the composition of the material, the grain refinement can effectively improve the strength of the material and improve the plasticity and toughness of the material; through grain refinement, ultra-fine grain materials ( It is generally believed that the grain size is 10~1000nm), because ultra-fine-grained materials have excellent comprehensive mechanical ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K20/00
CPCF16B11/004
Inventor 陈刚赵玉涛季鹏飞姜柱
Owner 昊石新材料科技南通有限公司
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