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Method for preparing nano-sized twin crystal Cu-Al or Cu-Zn alloy

A nano-twin, cu-zn technology is applied in the field of preparation of nano-twin materials, which can solve the problem of high process requirements, achieve the effects of simple preparation process, increase density, and promote deformation twinning

Inactive Publication Date: 2015-03-25
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the process requirements are relatively high, and the thickness of the prepared nano-twinned Cu is only 390-1120 microns

Method used

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  • Method for preparing nano-sized twin crystal Cu-Al or Cu-Zn alloy
  • Method for preparing nano-sized twin crystal Cu-Al or Cu-Zn alloy
  • Method for preparing nano-sized twin crystal Cu-Al or Cu-Zn alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The Cu-2.2%Al alloy is processed into a square material of 12.2mm×12.2mm×80mm.

[0030] Carry out solid solution treatment to Cu-2.2%Al alloy, the solution temperature is 800℃, and the holding time is 1.5h. Carrying out solid solution treatment to Cu-Al alloy can play the role of solid solution strengthening. In the subsequent cooling process, First cool the alloy to 500-600°C with the furnace, and then perform brine cooling to make the internal structure of the Cu-Al alloy more uniform.

[0031] The Cu-2.2%Al alloy cooled by brine was soaked in liquid nitrogen for 5 minutes, and a secondary equal-channel deformation was carried out quickly, such as figure 1 As shown, the inner corner of the mold undergoing equal channel deformation is 120°, the mold outer angle ψ is 0°, and the deformation speed is 15-60mm / min. The Cu-2.2%Al alloy after equal channel deformation was subjected to cryogenic treatment and soaked in liquid nitrogen for 40min, and the mechanical properti...

Embodiment 2

[0034] The Cu-4.5%Al alloy is processed into a square material of 12.2mm×12.2mm×80mm.

[0035] Carry out solid solution treatment to Cu-4.5%Al alloy, the solution temperature is 900℃, and the holding time is 2h. Carrying out solid solution treatment on Cu-Al alloy can play the role of solid solution strengthening. In the subsequent cooling process, first Cool the alloy to 500-600°C with the furnace, and then perform brine cooling to make the internal structure of the Cu-Al alloy more uniform.

[0036] The Cu-4.5% Al alloy cooled by brine was soaked in liquid nitrogen for 30 minutes, and a secondary equal channel deformation was carried out quickly, and the inner corner of the mold is 120°, the mold outer angle ψ is 0°, and the deformation speed is 15-60mm / min. The Cu-4.5%Al alloy after equal channel deformation was cryogenically treated and soaked in liquid nitrogen for 50 minutes, and the mechanical properties of the material were further optimized by cryogenic treatment. ...

Embodiment 3

[0039] The Cu-7.0%Al alloy is processed into a square material of 12.2mm×12.2mm×80mm.

[0040] Carry out solid solution treatment to Cu-7.0%Al alloy, the solution temperature is 850℃, and the holding time is 1.5h. Carrying out solid solution treatment to Cu-Al alloy can play the role of solid solution strengthening. In the subsequent cooling process, Cool to 500-600°C with the furnace first, and then perform brine cooling to make the internal structure of the Cu-Al alloy more uniform.

[0041] The Cu-7.0% Al alloy cooled by brine was soaked in liquid nitrogen for 15 minutes, and a secondary equal channel deformation was carried out quickly, and the inner corner of the mold is 120°, the mold outer angle ψ is 0°, and the deformation speed is 15-60mm / min. The Cu-7.0%Al alloy after equal channel deformation was cryogenically treated and soaked in liquid nitrogen for 40 minutes, and the mechanical properties of the material were further optimized by cryogenic treatment.

[0042]...

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Abstract

The invention provides a method for preparing a nano-sized crystal twin Cu-Al or Cu-Zn alloy. The method comprises the following steps: carrying out solution treatment on Cu-Al or Cu-Zn alloy; during solution treatment, firstly carrying out furnace cooling on the Cu-Al or Cu-Zn alloy and then cooling with saline water; soaking the Cu-Al or Cu-Zn alloy cooled by the saline water in liquid nitrogen; rapidly carrying out equal-channel pressing on the Cu-Al or Cu-Zn alloy; and carrying out subzero treatment on the Cu-Al or Cu-Zn alloy which is subjected to equal-channel pressing. The micro hardness and strength of the nano-sized twin crystal Cu-Al or Cu-Zn alloy prepared by the method are significantly improved; the nano-sized crystal twin Cu-Al or Cu-Zn alloy has good plasticity; the production process of the method is simple; and preparation of the nano-sized twin crystal alloy of a large-size sample can be achieved under the condition that the sample and the size are not changed.

Description

technical field [0001] The invention belongs to the field of preparation of nano twin crystal materials, in particular to a preparation method of nano twin crystal Cu-Al or Cu-Zn alloy. Background technique [0002] Cu-Al or Cu-Zn alloys have excellent physical, chemical, mechanical, wear-resistant and corrosion-resistant properties. They are a class of engineering materials with excellent comprehensive properties and are widely used in machinery, automobile manufacturing, home appliances and other industries. Copper-aluminum alloys are relatively cheap and have become partial substitutes for some expensive metal materials, such as tin bronze, stainless steel, nickel-based alloys, etc. However, with the advancement of science and technology, the mechanical properties of ordinary copper-aluminum alloys such as hardness and strength cannot meet the practical application, and it is urgent to further improve the comprehensive mechanical properties of the alloy. [0003] At pres...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/08
CPCC22F1/08
Inventor 魏伟荀永德魏坤霞杜庆柏胡静
Owner CHANGZHOU UNIV
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