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Thermodiffusion method for manufacturing wide temperature range phase transition nickel titanium alloy

A technology of nickel-titanium alloy and thermal diffusion, which is applied in the field of wide-temperature phase-change nickel-titanium alloy and its thermal diffusion preparation, can solve the problem that homogeneous nickel-titanium alloy cannot meet the temperature range of use, and achieve good damping effect and high damping temperature The effect of large interval and wide phase transition temperature range

Inactive Publication Date: 2008-08-20
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In most cases, the damping device needs to be used in a wide temperature range. The traditional homogeneous nickel-titanium alloy is difficult to meet the requirements of the temperature range. Increasing the martensitic transformation temperature range of the alloy is to improve the use of the damping device of the nickel-titanium alloy. An important way of performance

Method used

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  • Thermodiffusion method for manufacturing wide temperature range phase transition nickel titanium alloy
  • Thermodiffusion method for manufacturing wide temperature range phase transition nickel titanium alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Materials and equipment

[0021] (1-1) Nickel-titanium alloy, the composition is Ni50.9-Ti, and a hot-rolled sheet material with a thickness of 2 mm.

[0022] (1-2) Chemical reagents such as ethanol, hydrofluoric acid, and nitric acid are chemically pure.

[0023] (1-3) Argon, pure argon.

[0024] (1-4) Box-type resistance furnace.

[0025] (2) Sample preparation

[0026] (2-1) Cut the test piece by wire cutting method, and the size of the test piece is 2mm×5mm×30mm.

[0027] (2-2) Chemical cleaning sample, the pickling solution is HF:HNO 3 :H 2 O=1:2:10 (v / v), after the surface oxide falls off, rinse with plenty of water and dry with hot air.

[0028] (2-3) The test piece is solution treated in an argon protection furnace, the solution temperature is 850°C, the heating time is 15 minutes, and it is quenched into water immediately after being out of the furnace.

[0029] (2-4) Take out the test piece from the water and dry it with hot air.

[0030] (3) therm...

Embodiment 2

[0038] (1) Materials and equipment

[0039] (1-1) Nickel-titanium alloy, the composition is Ni51.3-Ti, a hot-rolled rod with a diameter of Φ20mm.

[0040] (1-2) Chemical reagents such as ethanol, hydrofluoric acid, and nitric acid are chemically pure.

[0041] (1-3) Argon, pure argon.

[0042] (1-4) Box-type resistance furnace.

[0043] (2) Sample preparation

[0044] (2-1) Cut the test piece by wire cutting method, and the size of the test piece is Φ20mm×10mm.

[0045] (2-2) Chemical cleaning sample, the pickling solution is HF:HNO 3 :H 2 O=1:2:10 (v / v), after the surface oxide falls off, rinse with plenty of water and dry with hot air.

[0046] (2-3) The test piece is solid solution treated in an argon protection furnace, the solid solution temperature is 850°C, the heating time is 30min, and it is immediately quenched into water after being out of the furnace.

[0047] (2-4) Take out the test piece from the water and dry it with hot air.

[0048] (3) thermal diffusi...

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Abstract

The invention relates to a thermal diffusion method for manufacturing a nitinol with wide temperature phase transition, pertaining to the filed of metallic functional materials. The invention is characterized in that the composition range of the nitinol with wide temperature phase transition is: Ni50.5-Ti to Ni52-Ti, and the manufacturing method comprises: (1) the nitinol with wide temperature phase transition is obtained by adopting a plurality of short-term heating and quenching; (2) the heating temperature for the quenching of the nitinol with wide temperature phase transition ranges from 300-900 DEG C; (3) the heating time for the quenching of the nitinol with wide temperature phase transition is 1-600s; (4) the treatment times for the quenching of the nitinol with wide temperature phase transition are 1-30. From the beginning of the phase transition to the end of the phase transition Ms-Mf, the temperature range is more than 50 DEG C. The temperature range of the martensitic phase transformation of the invention is wide, high damping temperature range is wide, good damping effect is performed under poor strain condition; the austenite phase always kept in the interior of the nitinol can ensure good hyperelasticity, thus leading an oscillating damper to have tightening effect to improve the damping effect; the thermal diffusion method requires simple equipment and is easily operated.

Description

Technical field: [0001] The invention belongs to the field of metal functional materials, and in particular relates to a wide-temperature phase-change nickel-titanium alloy and a thermal diffusion preparation method thereof. Background technique: [0002] Nickel-titanium alloy not only has excellent shape memory effect and superelasticity, but also is a potential damping material. Compared with conventional damping materials such as viscoelastic polymer materials and low yield point damping metals, nickel-titanium alloys have the advantages of good weather resistance, good fatigue resistance, and large recoverable deformation. Since the first memory alloy damping device came out in 1991, the research and application fields of memory alloy damping materials and devices have expanded rapidly, from space to ground, from vehicles to bridges and buildings [Chen Xin, Song Kongjie, Wang Min, Sun Lingling . Shape memory alloy superelastic damping characteristics and engineering app...

Claims

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Application Information

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IPC IPC(8): C22F1/10C22C19/03
Inventor 赵兴科陈庚王蔚黄继华张华
Owner UNIV OF SCI & TECH BEIJING
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