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Preparation method of titanium-nickel-cobalt memory alloy

A technology of memory alloy and titanium-nickel, which is applied in the field of preparation of titanium-nickel-cobalt memory alloy body, can solve the problems of reducing the temperature of R-phase transformation into martensite phase and expanding the temperature range of R-phase, so as to improve the shape recovery characteristics and increase the The effect of cycle stability

Inactive Publication Date: 2018-09-07
苏州诺弘添恒材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a method for preparing a titanium-nickel-cobalt memory alloy body, which overcomes the difficulty in controlling the porosity, pore diameter and pore type in the existing porous TiNiCo shape memory alloy preparation method and the damping performance and other mechanical properties of the alloy product Defects that still need to be improved, the TiNiCo shape memory alloy processed by this method has an internal grain size of submicron order, and the fine grain size and precipitated phase can strengthen the TiNiCo shape memory alloy matrix, thereby reducing the R phase transformation into Martensitic The temperature of the bulk phase expands the temperature range in which the R phase exists

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The mixed powder is prepared in the following parts by weight

[0024] 25 parts of titanium powder;

[0025] 42 parts of nickel powder;

[0026] 12 Cobalt Powder

[0027] Yttrium powder 0.5 part

[0028] The mixed powder was placed in a stainless steel ball mill, filled with anhydrous ethanol, sealed, and milled on a planetary ball mill for 3 hours. The good mixed powder is taken out and placed on filter paper for 6 minutes to obtain raw material powder.

[0029] The above-mentioned raw material powder is evenly mixed with the decrystallized water KCl particles, and the consumption of the decrystallized water KCl particles is 65% of the volume percentage of the mixture of the mixed powder and the decrystallized water KCl particles, and the mixture is mixed in a mixer for 45min. Into a stainless steel mold coated with zinc stearate on the inner wall, pressurize 380MPa in one direction to obtain a green body, then put the green body into an alumina crucible, and place...

Embodiment 2

[0033] The mixed powder is prepared in the following parts by weight

[0034] 28 parts of titanium powder;

[0035] 45 parts of nickel powder;

[0036] 16 Cobalt Powder

[0037] 1.5 parts yttrium powder

[0038] Put the mixed powder in a stainless steel ball mill tank, fill it with anhydrous ethanol, seal it, and mill it on a planetary ball mill for 3-4 hours. After that, take out the ball-milled mixed powder and place it on filter paper for 6-8 minutes to obtain raw material powder.

[0039] The above-mentioned raw material powder is evenly mixed with the decrystallized water KCl particles, and the consumption of the decrystallized water KCl particles is 75% of the volume percentage of the mixture of the mixed powder and the decrystallized water KCl particles, and the mixture is mixed in the mixer for 50min. Into a stainless steel mold coated with zinc stearate on the inner wall, press 400MPa in one direction to obtain a green body, and then put the green body into an alu...

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Abstract

The invention discloses a preparation method of a titanium-nickel-cobalt memory alloy. By adopting the method provided by the invention, the defects of an existing porous TiNiCo shape memory alloy preparation method that the porosity, pore diameter and pore shape are difficult to control, and the damping performance and other mechanical properties of an alloy product still need to be improved areovercome. An inner crystal grain size of a TiNiCo shape memory alloy treated by the method has a sub-micron order of magnitude; the fine crystal grain size and a separation phase can be used for reinforcing a TiNiCo shape memory alloy matrix so that the temperature of converting an R phase into a martensitic phase is reduced and a temperature range of the R phase is enlarged. Therefore, the R phase is used for providing convenient conditions; meanwhile, shape recovery properties of the alloy are improved, and the circulating stability of the alloy is improved.

Description

technical field [0001] The invention relates to the field of alloy material manufacturing, in particular to a preparation method of a titanium-nickel-cobalt memory alloy body. Background technique [0002] Shape Memory Alloy (SMA) refers to an alloy that can automatically perform work and restore the shape before deformation under certain physical conditions after proper deformation. Shape memory alloys have become an important functional material and have been widely used because of their high recoverable deformation. Nickel-titanium-based shape memory has the characteristics of memory recovery, non-magnetic, wear-resistant and corrosion-resistant, high-temperature resistance, and non-toxic. However, the yield strength of current shape memory alloys is generally below 700 MPa. [0003] Memory alloys are often used in surgical implants such as human joints. Compared with stainless steel and titanium alloys, their mechanical properties are closer to those of cortical bone a...

Claims

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Application Information

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IPC IPC(8): C22C19/03C22C30/00C22C1/08C22F1/10C22F1/02
CPCC22C19/03B22F3/1134C22C19/007C22C30/00C22F1/006C22F1/02C22F1/10
Inventor 不公告发明人
Owner 苏州诺弘添恒材料科技有限公司
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