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A kind of preparation method of cu-al-mn shape memory alloy gradient functional material

A technology of gradient functional materials and memory alloys, which is applied in the field of metal material preparation, can solve the problems of inability to prepare and have stability, and achieve the effects of small influence of martensitic transformation temperature, high controllability and simple process operation.

Active Publication Date: 2017-05-31
UNIV OF SCI & TECH BEIJING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a preparation method of Cu-Al-Mn shape memory alloy gradient functional material, which solves the problem that the traditional composition gradient design cannot prepare shape memory alloy gradient functional material with stable martensitic transformation temperature, and satisfies the The demand for performance diversification in the practical application of shape memory alloys; the present invention adopts a gradient heat treatment method, the heat treatment process parameters of the gradient heat treatment method, (wherein, the heat treatment temperature or time is controllable), and utilizes bainite precipitation phase strengthening The mechanism and the law that the content of bainite precipitates increases with the increase of heat treatment temperature or time prolongs, so that the phase composition of the alloy presents a gradient change, thereby obtaining a Cu-Al with gradient changes in strength, hardness, superelasticity and other properties. -Mn shape memory alloy gradient functional material

Method used

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  • A kind of preparation method of cu-al-mn shape memory alloy gradient functional material
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  • A kind of preparation method of cu-al-mn shape memory alloy gradient functional material

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Effect test

Embodiment 1

[0044] Preparation of gradient functional guide wires

[0045] Adopt the continuous directional solidification method, use the pull-down continuous directional solidification equipment, use oxygen-free copper, electrolytic aluminum and electrolytic manganese with a purity of 99.95% as raw materials, according to the chemical formula Cu 71.5 al 17 mn 11.5 Proportioning, through mixing, vacuum smelting and down-drawing, etc., a smooth columnar crystal structure Cu with a diameter of 4mm is prepared. 71.5 al 17 mn 11.5 For the alloy wire rod, the vacuum melting temperature is 1200°C, the temperature of the graphite casting mold is controlled to be 1100°C, and the casting speed is 20mm / min. The columnar grain structure Cu prepared by measuring 71.5 al 17 mn 11.5 The starting temperature of the martensitic transformation of the alloy wire is -24.1°C, its superelasticity is 13.1% at room temperature, the Vickers hardness is 256Hv, and the critical stress of the martensitic tr...

Embodiment 2

[0052] Fabrication of Rods for Functional Gradient Robotic Arms

[0053] Adopt the continuous directional solidification method, use the pull-down continuous directional solidification equipment, use oxygen-free copper, electrolytic aluminum and electrolytic manganese with a purity of 99.95% as raw materials, according to the chemical formula Cu 71 al 19 mn 10 Proportioning, and then through the processes of mixing, vacuum smelting and down drawing, a columnar crystal structure Cu with a diameter of 10mm is prepared. 71 al 19 mn 10 Alloy rods, wherein the vacuum melting temperature is 1150°C, the casting mold temperature is 1050°C, and the casting speed is 10mm / min; the columnar grain structure Cu 71 al 19 mn 10 The starting temperature of the martensitic transformation of the alloy billet is -43.2°C, its superelasticity is 13% at room temperature, the Vickers hardness is 266Hv, and the critical stress of the martensitic transformation is 278MPa.

[0054] The gradient h...

Embodiment 3

[0060] Fabrication of Functionally Gradient Foldable Electronic Device Panels

[0061] Using the directional solidification method, using oxygen-free copper, electrolytic aluminum and electrolytic manganese with a purity of 99.95% as raw materials, according to the chemical formula Cu 70 al 20 mn 10 Proportioning, and then through smelting (melting temperature is 1200°C) and directional solidification (the graphite mold is heated in the circumferential direction, the temperature is 1100°C; the base of the water-cooled copper mold is cooled), and the columnar crystal structure Cu with a size of 150mm×80mm×50mm is prepared. 70 al 20 mn 10 (at.%) cast slab, measured the columnar grain structure Cu 70 al 20 mn 10 (at.%) The starting temperature of the martensitic transformation of the slab is -61.2°C, the superelasticity is 15% at room temperature, the Vickers hardness is 230Hv, the critical stress of the martensitic transformation is 192MPa, and the wire cutting is 150mm×80...

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Abstract

The invention relates to a preparing method of Cu-Al-Mn shape memory alloy functional gradient materials, and belongs to the field of metal material preparing. The preparing method comprises the steps that an ultra-high elasticity Cu-Al-Mn alloy material of a columnar crystal structure is utilized as a raw material, thermal treatment is carried out on the Cu-Al-Mn alloy material in the assigned direction through a gradient thermal treatment method according to product performance, air cooling or water quenching is carried out after thermal treatment, and the Cu-Al-Mn shape memory alloy functional gradient materials with the alloy performance in gradient change in the assigned direction are obtained through preparing. According to the preparing method of the Cu-Al-Mn shape memory alloy functional gradient materials, alloy components are not changed, the influence on the martensite phase transformation temperature of alloy is weak, the large-range change of the alloy performance can be achieved, and the technology operation is simple; and controllability is high, continuous thermal treatment can be achieved, and efficiency is high.

Description

technical field [0001] The invention belongs to the field of metal material preparation and relates to a preparation method of a Cu-Al-Mn shape memory alloy gradient functional material. Background technique [0002] Cu-Al-Mn shape memory alloy is an important copper-based shape memory alloy. Its price is low, equivalent to 1 / 10 of NiTi shape memory alloy. It has good electrical and thermal conductivity and can be made into sensors, detectors, and damping devices. , energy converters and smart micro-devices, etc., and can be widely used in many fields such as electronic communications, medical and health care, machinery manufacturing, aerospace, energy and chemical industry, and daily life. [0003] At present, components made of shape memory alloys, such as smart drives, robotic arms, guide wires, etc., need to be connected with other components, such as structural components made of stainless steel, aluminum alloy, etc. When connecting with these structural components, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/01C22C1/02C22F1/08
Inventor 黄海友刘记立谢建新
Owner UNIV OF SCI & TECH BEIJING
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