Copper-based shape memory alloy and preparation method and application of copper-based shape memory alloy

A memory alloy and copper-based technology, applied in the field of memory alloys, can solve the problems of short service life, potential safety hazards, memory performance decline, and memory alloy material change hysteresis.

Active Publication Date: 2020-06-19
安新县华昌合金厂
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] For example, the copper-based shape memory alloy recorded in Chinese patent CN104911396A is composed of Cu-Al-Mn and trace elements, and the memory alloy material is obtained by homogenizing heat treatment and rolling process; the copper-based shape memory alloy recorded in Chinese patent CN102400008A is composed of Cu-Zn - Al element composition, the memory alloy material is obtained by homogenizing heat treatment and cold rolling; the copper-based shape memory alloy recorded in the Chinese patent CN109266887A is composed of Cu-Al-Mn and trace elements, heat-treated at 850 ° C for 15 minutes, and then in Quenching in water, then heating to 850°C for 10 minutes, cooling in water at room temperature to obtain a memory alloy material; the copper-based shape memory alloy descri...

Method used

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preparation example Construction

[0039] The present invention provides a method for preparing a copper-based shape memory alloy described in the above technical solution, comprising the following steps:

[0040] (1) carrying out eutectic melting of zinc and tin to obtain the first alloy liquid;

[0041] (2) mixing the manganese-copper master alloy and the boron-copper master alloy with the first alloy liquid described in step (1), and carrying out the first melting to obtain the second alloy liquid;

[0042] (3) aluminum, CuP14 phosphorus copper deoxidizer are mixed with the second alloy liquid described in step (2), carry out deoxidation reaction, obtain the 3rd alloy liquid;

[0043] (4) mixing the refining agent with the third alloy liquid described in step (3), and refining to obtain the fourth alloy liquid;

[0044] (5) mixing the LaCe mixed rare earth with the fourth alloy liquid described in step (4), and performing the second melting to obtain the fifth alloy liquid;

[0045] (6) homogenizing the fi...

Embodiment 1～6

[0065] In terms of 100% mass content, the chemical composition of the copper-based shape memory alloy base material of Examples 1-6 is shown in Table 1; the preparation method of the copper-based shape memory alloy base material is:

[0066] Preheat the natural gas copper melting furnace to 600°C, add electrolytic copper and retorted fruit charcoal particles, and heat up to fully melt; raise the temperature in the furnace to 1080°C, add 0# zinc and refined tin for eutectic melting, and obtain the first alloy liquid;

[0067] Control the temperature in the furnace to be 1100°C, add manganese-copper master alloy Cu75%Mn25% (mass fraction) and boron-copper master alloy Cu95%B5% (mass fraction), and perform the first melting to obtain the second alloy liquid;

[0068] Control the temperature in the furnace to 1120°C, add A00 aluminum, stir fully, add CuP14 phosphorus copper for deoxidation, stir, and carry out deoxidation reaction to obtain the third alloy liquid;

[0069] Control...

Embodiment 7～12

[0093] The copper-based shape memory alloy base material prepared in Examples 1-6 is subjected to cold and hot processing to obtain the copper-based shape memory alloy in Examples 7-12; wherein, the copper-based shape memory alloy base material prepared in Example 1 is Carry out cold and hot processing to obtain the copper-based shape memory alloy of embodiment 7; The copper-based shape memory alloy parent material prepared in embodiment 2 is carried out to obtain the copper-based shape memory alloy of embodiment 8; and so on; The specific method of hot and cold processing is as follows:

[0094] Place the copper-based shape memory alloy base material of Examples 1 to 6 in a box-type resistance furnace, and uniformly anneal for 12 hours at 850°C, then cool to room temperature with the furnace temperature, and then heat the alloy to 850°C again, at a constant temperature Homogenizing annealing for 8 hours, and then water cooling at 30°C to obtain a copper-based shape memory all...

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Abstract

The invention relates to the technical field of memory alloys, in particular to a copper-based shape memory alloy and a preparation method and application of the copper-based shape memory alloy. The copper-based shape memory alloy comprises the following chemical compositions, by mass percent, of 19-27% of Zn, 3.5-6.8% of Al, 1.0-3.5% of Mn, 0.5-3.6% of Sn, 0.01-0.3% of P, 0.01-0.05% of B, 0.02-0.6% of LaCe misch metal, and the balance Cu. The copper-based shape memory alloy has excellent memory performance, fatigue resistance and high temperature hot tearing resistance, the fatigue limit canbe improved by 55%, and the corrosion fatigue strength can be improved by 60%. The cavitation corrosion resistance is improved by 65%, the environment corrosion resistance to acidic and alkaline water, seawater and corrosive aerial fog is improved by 25 times, and thus the service life is prolonged by more than 6 times.

Description

technical field [0001] The invention relates to the technical field of memory alloys, in particular to a copper-based shape memory alloy and its preparation method and application. Background technique [0002] With the continuous development of science and technology, people have found that metals have shape memory function, and shape memory alloy is a new type of functional material that has been studied more in recent years, and will be widely used in aerospace, military industry, automobiles, instruments, automatic control , medical bioengineering, robotics, artificial intelligence equipment and other fields. At present, the shape memory alloys that are widely used are divided into three categories: Ni-Ti base system, Cu base system, and Fe base system, while copper base shape memory alloys have excellent electrical and thermal conductivity, low price, and a large phase transition temperature range. , therefore, copper-based shape memory alloys have broad application pr...

Claims

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Application Information

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IPC IPC(8): C22C9/04C22C1/03C22C1/06C22F1/08G01K5/48
CPCC22C1/03C22C1/06C22C9/04C22F1/006C22F1/08G01K5/483
Inventor 杨桂香杨景周杨景浩马明杨东华陈海深杨东娜于小芳王梦珂
Owner 安新县华昌合金厂
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