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A kind of preparation method of porous copper base shape memory alloy

A technology of memory alloy and porous copper, which is applied in the field of preparation of porous copper-based shape memory alloy, can solve the problems of high preparation cost and low production safety, and achieve the effects of reducing production cost, excellent rolling formability and increasing cost

Inactive Publication Date: 2019-02-22
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is: to provide a preparation method of porous copper-based shape memory alloy, which adopts powder metallurgy technology to prepare Cu-Al- Mn pre-alloyed powder is used as the matrix material, which overcomes the defects of high product preparation cost and low production safety existing in the prior art

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  • A kind of preparation method of porous copper base shape memory alloy
  • A kind of preparation method of porous copper base shape memory alloy
  • A kind of preparation method of porous copper base shape memory alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The first step, the preparation of Cu-Al-Mn pre-alloyed powder:

[0043] Weigh raw material pure Cu powder, pure Al powder and pure Mn powder and carry out batching respectively according to need, and wherein pure Al powder accounts for 11.8% of Cu-Al-Mn mixed powder total mass, and pure Mn powder accounts for Cu-Al-Mn mixed powder total mass 2.4% of the mass, pure Cu powder as the matrix, adding stearic acid accounting for 0.08% of the total mass of Cu-Al-Mn mixed powder as an additive, and ball milling on a planetary ball mill for 8 hours under the protection of argon, the balls used in ball milling The material ratio is 10:1, and the rotating speed of the ball mill is 300 revolutions / minute, thus making Cu-Al-Mn pre-alloyed powder;

[0044] The second step, the preparation of the green body:

[0045] The Cu-Al-Mn pre-alloyed powder prepared in the first step is uniformly mixed with absolute ethanol accounting for 6% of its mass, and then uniformly mixed with decryst...

Embodiment 2

[0054] The first step, the preparation of Cu-Al-Mn pre-alloyed powder:

[0055] Weigh raw material pure Cu powder, pure Al powder and pure Mn powder and carry out batching respectively according to need, and wherein pure Al powder accounts for 11.9% of Cu-Al-Mn mixed powder total mass, and pure Mn powder accounts for Cu-Al-Mn mixed powder total mass 2.5% of the mass, pure Cu powder as the matrix, adding stearic acid accounting for 0.1% of the total mass of Cu-Al-Mn mixed powder as an additive, and ball milling on a planetary ball mill for 10 hours under the protection of argon, the balls used in ball milling The material ratio is 10:1, and the rotating speed of the ball mill is 300 rpm, thus making Cu-Al-Mn pre-alloyed powder;

[0056] The second step, the preparation of the green body:

[0057] The Cu-Al-Mn pre-alloyed powder prepared in the first step is uniformly mixed with absolute ethanol accounting for 7% of its mass, and then uniformly mixed with decrystallized water N...

Embodiment 3

[0067] Except that in the second step, the amount of decrystallization water NaCl particles accounts for 65% of the volume percentage of the mixture of Cu—Al—Mn prealloyed powder and decrystallization water NaCl particles, the others are the same as in Example 2.

[0068] The porous CuAlMn shape memory alloy product prepared in this embodiment has a through-hole structure, with an average porosity of 65.0% and an average pore diameter of 0.56 mm.

[0069] figure 1 (a) shows that the porosity obtained in this embodiment is 65.0%, and the average pore diameter is a macroscopic photo of the porous CuAlMn shape memory alloy of 0.56mm; figure 1 (b) shows the macroscopic topography photograph of the cross-section of the product that the present embodiment makes; figure 1 (c) show the macroscopic topography photo of the longitudinal section of the product made in this embodiment; figure 2 Show the porosity 65% ​​that present embodiment makes, the average pore diameter 0.56mm porou...

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Abstract

The invention discloses a preparation method of a porous copper-based shape memory alloy and relates to manufacturing of the porous shape memory alloy. Cu-Al-Mn prealloying powder prepared by compounding of original metal pure Cu powder, pure Al powder and pure Mn powder serves as a base material; the base material is uniformly mixed with absolute ethyl alcohol and then uniformly mixed with decrystallization water NaCl particles, and pressing is conducted to obtain a green body; and the green body is subjected to sinter molding, then placed in boiling water of 100 DEG C to thoroughly removing the residual NaCl particles in holes in a boiling mode and finally placed in a dryer of 60 DEG C to be subjected to heat preservation for 20-30 minutes, and the porous copper-based shape memory alloy with a through hole structure, the average porosity being 50-80% and the average pore diameter being 0.2-1.5 mm is prepared. The defects that in the prior art, the preparation cost of a product is high, and production safety is low are overcome.

Description

technical field [0001] The technical scheme of the invention relates to the manufacture of porous shape memory alloys, in particular to a method for preparing porous copper-based shape memory alloys. Background technique [0002] Porous shape memory alloys have the excellent characteristics of light weight, high specific strength, high energy absorption, shape memory alloy shape memory effect and pseudoelasticity of porous metal materials, and have abnormally high damping performance due to the superposition effect of multiple damping sources. In the past few decades, people's research has mainly focused on porous TiNi shape memory alloys. Although this alloy has excellent comprehensive properties, its high price limits its wide application to a large extent. In recent years, because copper-based shape memory alloys also have high damping capacity and excellent shape memory functional characteristics, coupled with their obvious price advantages, people have also begun to stu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/01C22C1/08B22F3/02B22F3/11B22F9/04C22F1/08
CPCB22F3/02B22F3/1134B22F9/04B22F2009/041C22C9/01C22F1/002C22F1/08
Inventor 王清周姬向薇崔春翔殷福星刘晓静焦志娴丁燕军
Owner HEBEI UNIV OF TECH
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