4D printing method and application of titanium-nickel shape memory alloy

A memory alloy, titanium-nickel alloy technology, applied in the field of shape memory alloy preparation, can solve the problems of accelerating the pace of application, and achieve the effect of large thermal stress and low thermal conductivity

Active Publication Date: 2019-04-19
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, it effectively solves the problems encountered by traditional processes, making its production more environmentally friendly and efficient, and greatly speeding up its application.

Method used

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  • 4D printing method and application of titanium-nickel shape memory alloy
  • 4D printing method and application of titanium-nickel shape memory alloy
  • 4D printing method and application of titanium-nickel shape memory alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Milling. Dosing is carried out according to the following titanium-nickel atomic ratio: Ti 50.6at.%, Ni49.4at.%. Titanium-nickel alloy rods are smelted under vacuum conditions. Use AMC-EIGA-50 powder making equipment to heat the rod to 1350°C, atomize the rod under 4.5MPa argon pressure, collect the obtained raw powder, and carry out screening treatment to control the particle size of the target powder at In the range of 15-53μm.

[0032] (2) Powder modification. Put the titanium-nickel alloy powder into a stainless steel ball mill tank in a vacuum glove box (no stainless steel balls or other ball milling media are added to the ball mill tank); take out the stainless steel tank, and pour high-purity argon gas (0.15-0.2MPa) into the vacuum tank body; The stainless steel tank was placed in a Plasma-BM-S plasma ball mill for discharge treatment. The control parameters are: voltage 125V, current control at 1.4A, electrode rotation speed 800r / min, duration of each di...

Embodiment 2

[0036] (1) Milling. Dosing is carried out according to the following titanium-nickel atomic ratio: Ti 49.5 at.%, Ni 50.5 at.%. Titanium-nickel alloy rods are smelted under vacuum conditions. Use AMC-EIGA-50 powder making equipment to heat the rod to 1400°C, atomize the rod under 3MPa argon pressure, collect the obtained raw powder, and carry out screening treatment to control the particle size of the target powder at 15 ~53μm range.

[0037] (2) Powder modification. Put the titanium-nickel alloy powder into a stainless steel ball mill tank in a vacuum glove box (no stainless steel balls or other ball milling media are added to the ball mill tank); take out the stainless steel tank, and pour high-purity argon gas (0.15-0.2MPa) into the vacuum tank body; The stainless steel tank was placed in a Plasma-BM-S plasma ball mill for discharge treatment. The control parameters are: voltage 135V, current control at 1.7A, electrode rotation speed 1000r / min, duration of each discharge...

Embodiment 3

[0041] (1) Milling. Dosing according to the following titanium-nickel atomic ratio: Ti 44at.%, Ni 56at.%. Titanium-nickel alloy rods are smelted under vacuum conditions. Use AMC-EIGA-50 powder making equipment to heat the bar to 1250°C, atomize the bar under 2.5MPa argon pressure, collect the obtained raw powder, and carry out screening treatment to control the particle size of the target powder at In the range of 15-53μm.

[0042] (2) Powder modification. Put the titanium-nickel alloy powder into a stainless steel ball mill tank in a vacuum glove box (no stainless steel balls or other ball milling media are added to the ball mill tank); take out the stainless steel tank, and pour high-purity argon gas (0.15-0.2 MPa) into the vacuum tank body; The stainless steel tank was placed in a Plasma-BM-S plasma ball mill for discharge treatment. The control parameters are: voltage 125V, current control at 1.2A, electrode rotation speed 1200r / min, duration of each discharge treatmen...

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Abstract

The invention belongs to the technical field of preparation of shape memory alloys, and discloses a 4D printing method and application of a titanium-nickel shape memory alloy. Pure titanium and pure nickel are matched and smelted, and titanium-nickel alloy bars are obtained; then alloy powder is prepared through a rotating electrode atomization method, the powder is screened, and titanium-nickel alloy powder with the grain size of 15 micrometers to 53 micrometers is obtained; and the obtained titanium-nickel alloy powder is placed in a discharge plasma assisted ball mill to be subjected to discharge treatment, the powder is subjected to surface modification, and finally the titanium-nickel shape memory alloy is formed by means of SLM forming. The phase composition of the obtained titanium-nickel shape memory alloy is composed of a B2 austenite phase of a CsC1 type structure, a B19' Martensite phase of a monocline structure and a Ti2Ni precipitated phase. The microstructure comprises nano-sized afterbirth-like crystals and micro dendrite, and the afterbirth-like crystals and the dendrite are alternately distributed in a layered manner. The advantages of being unique in organizationstructure, nearly fully dense and ultrahigh in performance are achieved.

Description

technical field [0001] The invention belongs to the technical field of shape memory alloy preparation, and in particular relates to a 4D printing method and application of a titanium-nickel shape memory alloy. Background technique [0002] Among many shape memory alloys, titanium-nickel shape memory alloys have excellent biocompatibility and are widely used in biomedicine such as orthodontic wires, spinal correction rods, intramedullary nails / nails, angioplasty rings, and micro forceps for surgery. field. At the same time, using its excellent shape memory effect and superelasticity, it is widely used in pipeline joints, pipeline fixing, spring drive devices, temperature controllers, temperature sensor triggers and other fields; using its high damping performance, it is widely used in vibration control Components, conical dampers and other fields; with its excellent corrosion resistance, it has application prospects in chemical industry, ship parts and other fields. [0003...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/105B22F9/08B22F1/00B33Y10/00B33Y40/00B33Y30/00
CPCB22F9/082B33Y10/00B33Y30/00B33Y40/00B22F10/00B22F1/14B22F10/36B22F10/34B22F10/28Y02P10/25C22C19/03C22C19/007B22F2998/10B22F2999/00C22C1/0433C22C1/0458B33Y70/00B33Y40/10B22F2009/0836B22F1/142B22F2202/13B22F2009/043B22F2009/041B23K26/342B23K2103/14B22F2301/15B22F2304/10
Inventor 杨超卢海洲马宏伟
Owner SOUTH CHINA UNIV OF TECH
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