TiNiNb/NbTi memory alloy composite material and preparation method thereof

A composite material and memory alloy technology, which is applied to the composite material of TiNiNb memory alloy and its preparation, and the field of TiNiNb/NbTi memory alloy composite material and its preparation, can solve the problems of limited application of damping materials, low yield strength, etc., to meet the demand , good plasticity and toughness

Inactive Publication Date: 2010-02-24
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the TiNi and TiNiNb memory alloys commonly used are generally in the martensitic state when they have high damping characteristics, and the yield strength is very low, generally not exceeding 200MPa, so they are subject to certain restrictions when used as damping materials.

Method used

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  • TiNiNb/NbTi memory alloy composite material and preparation method thereof
  • TiNiNb/NbTi memory alloy composite material and preparation method thereof
  • TiNiNb/NbTi memory alloy composite material and preparation method thereof

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preparation example Construction

[0039] The preparation method of TiNiNb / NbTi memory alloy composite material provided by the invention can comprise the following specific steps:

[0040] (1) selecting niobium with a purity of 99.9wt.%, titanium with a purity of 99.9wt.%, and nickel with a purity of 99.9wt.% according to the composition ratio of the composite material;

[0041] (2) Putting the above-mentioned composite material components into a smelting furnace, smelting to obtain a TiNiNb / NbTi memory alloy composite material, and casting it into an ingot;

[0042] (3) In a vacuum furnace, perform homogenization annealing on the cast ingot at 950°C for 10 hours;

[0043] (4) Hot forging the annealed ingot at 850°C radially into a cake-shaped material;

[0044] (5) Plastic processing is repeated on the cake-shaped material obtained by hot forging until the required profile is obtained.

Embodiment 1

[0045] Embodiment 1: Preparation of Nb 60 Ti 25 Ni 15 memory alloy composite

[0046] (1) by Nb content 60at.%, the ratio of Ti and Ni atomic ratio 5: 3 selects the niobium that purity is 99.9wt.%, the titanium that purity is 99.9wt.%, the nickel that purity is 99.9wt.%, wherein , the sum of the atomic percentages of Nb, Ti and Ni is 100%;

[0047] (2) Put the above-mentioned alloy components into a smelting furnace, melt and cast them into ingots under the protection of -0.5MPa argon;

[0048] (3) In a vacuum furnace, the ingot is homogenized and annealed at 950°C for 10 hours;

[0049] (4) hot forging the annealed button-shaped ingot at 850°C radially into a cake-shaped material with a thickness of 10 mm;

[0050] (5) Carry out cold rolling to the pie-shaped material that hot forging obtains, and the distortion of cold rolling is 50%-60%;

[0051] (6) Anneal the cold-rolled material at 800°C for 20 minutes;

[0052] (7) Step (5) and step (6) are repeated until a plate...

Embodiment 2

[0055] Embodiment 2: Preparation of Nb 54 Ti 26 Ni 20 memory alloy composite

[0056] (1) According to Nb content 54at.%, the ratio of Ti and Ni atomic ratio 1.3: 1 selects the niobium that purity is 99.9wt.%, the titanium that purity is 99.9wt.%, the nickel that purity is 99.9wt.%, wherein , the sum of the atomic percentages of Nb, Ti and Ni is 100%;

[0057] (2) Put the above-mentioned alloy components into a vacuum melting furnace, and melt them into ingots under the protection of -0.5MPa argon;

[0058] (3) Homogenize and anneal the smelted ingot at 950°C for 10 hours in a vacuum furnace;

[0059] (4) Hot forging the annealed ingot at 850°C into a rod-shaped material;

[0060] (5) At 470°C, hot-draw the hot-forged rod-shaped material;

[0061] (6) Step (5) is repeated until a wire with a diameter of 0.5 mm is obtained.

[0062] Cut off the 100mm long wire from the wire material obtained in step (6), after annealing at 400°C for 20min, observe the microstructure with...

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Abstract

The invention relates to a TiNiNb / NbTi memory alloy composite material and a preparation method thereof. The composite material comprises the following compositions in percentage by weight: 31 to 95 atomic percent of Nb element, and Ti element and Ni element in an atomic ratio of 1:1 to 2.5:1, wherein the total atomic percentage of the Ti element, the Ni element and the Nb element is 100 percent.The preparation method comprises the following steps: selecting elementary niobium, titanium and nickel with the purity of more than 99 weight percent in the composition ratio of the TiNiNb / NbTi memory alloy composite material; and putting the elementary niobium, titanium and nickel into a melting furnace at a vacuum degree of higher than 10-1 Pa or with inert gas protection to be melted into the TiNiNb / NbTi memory alloy composite material. The composite material provided by the invention has the property of a memory alloy intelligent composite material, and has the characteristics of high strength, good interface bonding, wide application temperature range and the like.

Description

technical field [0001] The invention belongs to the field of metal composite materials, and relates to a TiNiNb / NbTi memory alloy composite material and a preparation method thereof, in particular to a composite material with an in-situ self-generated TiNiNb memory alloy and a preparation method thereof. Background technique [0002] Due to the characteristics of shape memory effect, superelasticity, viscoelasticity, and high damping, TiNi-based shape memory alloys have attracted more and more attention from scholars at home and abroad for their intelligent properties of composite materials. Combining millimeter-scale TiNi wires in aluminum (alloy), magnesium alloy, polymer and cement can make the composite material have the characteristics of self-reinforcing when the temperature rises, controlling deformation, inhibiting crack growth, improving impact toughness, shock absorption and noise reduction; 200580036111.7 No. patent application discloses a memory alloy fiber-reinf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/03C22C1/02C22F1/10
Inventor 崔立山姜大强郑雁军赵新青李岩蒋小华
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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