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Ni-free super elastic Ti-based shape memory alloy and products thereof

A memory alloy, super-elastic technology, applied in the field of titanium-based shape memory alloy, to achieve the effect of wide application, high corrosion resistance and low cost

Inactive Publication Date: 2009-11-18
深圳市星河泉新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far there is still no nickel-free shape memory alloy with shape memory performance and phase change superelasticity comparable to titanium-nickel shape memory alloys, so it is necessary to research and develop new nickel-free shape memory alloys

Method used

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  • Ni-free super elastic Ti-based shape memory alloy and products thereof
  • Ni-free super elastic Ti-based shape memory alloy and products thereof
  • Ni-free super elastic Ti-based shape memory alloy and products thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Example 1 : Ti-21.5Zr-23.5Nb-1.2Al-0.6Ce alloy

[0043] The chemical composition range of the alloy according to the present invention:

[0044] Zr: 13-26wt%;

[0045] Nb: 13-26wt%;

[0046] Al: 0.3-2.8wt%;

[0047] Ce: 0.1-1.3wt%,

[0048] Ti and unavoidable impurity elements: balance.

[0049] The inevitable impurity elements mentioned here mainly include elements such as H, O, N, and C.

specific to Embodiment 1

[0050] Specifically to embodiment 1, the alloy composition obtained after smelting is:

[0051] Table 1: Chemical composition of the Ti-21.5Zr-Nb-1.2Al-0.6Ce alloy of Example 1

[0052] the element

[0053] The alloy of Example 1 was subjected to solution treatment: (temperature 850°C, heat preservation for 30 minutes, water cooling) to make a tensile sample, and tested by a tensile testing machine at room temperature (25±2°C). Set the maximum strain at 4.2%, measure and record the stress-strain curve when it is loaded and unloaded, refer to figure 2 . Experiments prove that the alloy of Example 1 has good superelasticity.

Embodiment 2

[0054] Example 2 : Ti-21.5Zr-23.5Nb-1.5Al-0.8Ce alloy

[0055] Prepare and smelt titanium alloys according to the following Table 2. The obtained alloys are subjected to solution treatment: (temperature 850°C, heat preservation for 30 minutes, water cooling) and then made into tensile samples. Stretching test machine experiment. Set the maximum strain at 4.2%, measure and record the stress-strain curve when it is loaded and unloaded, refer to image 3 . Experiments prove that the alloy of Example 2 has good superelasticity.

[0056] Table 2: Chemical composition of the Ti-21.5Zr-23.5Nb-1.5Al-0.8Ce alloy of Example 2

[0057] the element

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Abstract

The invention relates to a Ni-free super elastic Ti-based shape memory alloy and products thereof. Because of adding rare earths metal element Ce, the Ti-Zr-Nb-Fe-Al-Ce Ni-free super elastic Ti-based shape memory alloy has high erosion resistance and oxidation resistance as well as excellent welding performance, cold workability, phase-changing super elasticity, shape memory property and biocompatibility. The welding performance, the cold workability and the biocompatibility of the alloy are better than those of TiNi shape memory alloy, while the super elasticity and the shape memory property are equivalent to those of the TiNi shape memory alloy. The Ti-Zr-Nb-Fe-Al-Ce Ni-free super elastic Ti-based shape memory alloy not only can be used as biomaterial capable of being implanted in a human body for a long time, but also can be used as hyperelastic alloy manufacturing industrial products such as spectacle frame, bra support, golf club head, pipe joint, spring and drive element; moreover, the alloy has the advantages of easy processing, low cost and wide application range.

Description

technical field [0001] The invention relates to a titanium-based shape memory alloy, a preparation method and a product thereof, in particular to a nickel-free superelastic titanium-based shape memory alloy, a preparation method and a product thereof. Background technique [0002] TiNi shape memory alloy (trade name: Nitinol alloy) has excellent shape memory performance and phase transition superelasticity, and has passed the international general biological evaluation test, so it has been widely used in the medical field in the past 20 years. However, due to the allergic reaction and carcinogenicity of Ni element to some people, people are concerned about the release of toxic Ni ions due to wear and corrosion after long-term implantation in the human body, so it is hoped to develop a nickel-free superelastic titanium-based shape memory alloy. [0003] On September 9, 1988, Kathy K.Wang et al. proposed a new titanium alloy in US Patent No. 4,857,269, adding No. 1 component ...

Claims

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Application Information

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IPC IPC(8): C22C14/00C22C30/00A61L27/06A61L29/02A61L31/02A61K6/04G02C5/00A41C3/14A63B53/04F16F1/02A63B102/32
Inventor 王思泉
Owner 深圳市星河泉新材料有限公司
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