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High-fatigue resistance titanium-nickel shape memory alloy

A memory alloy and fatigue performance technology, applied in the field of titanium-nickel shape memory alloy, can solve problems such as fatigue fracture, accidental injury of patients, loss of function of tracheal stent, etc., and achieve good fatigue resistance effect

Inactive Publication Date: 2017-01-25
深圳市星河泉新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In terms of medical devices, taking the tracheal stent as an example, the titanium-nickel shape memory alloy tracheal stent implanted in the trachea often suffers from fatigue fracture 3 to 5 years after implantation, resulting in the loss of function of the tracheal stent, or causing harm to the patient. accidental injury

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0010] Embodiment 1: Preparation of a titanium-nickel shape memory alloy with high fatigue resistance of the present invention

[0011] refer to figure 1 , in this embodiment, the titanium-nickel shape memory alloy is proportioned according to the following components: titanium Ti is 44.5%wt, nickel is 54%wt, yttrium Y+cerium Ce is 0.7%wt, vanadium V+niobium Nb is 0.8% wt. The impurity content of the titanium-nickel shape memory alloy is controlled as follows: carbon≤0.05%wt, oxygen+nitrogen≤0.05%wt, hydrogen≤0.005%wt, other minor added elements and unavoidable impurities≤1.5%wt.

[0012] The preparation method of titanium-nickel shape memory alloy described in this embodiment is as follows:

[0013] 1. Weigh grade 0 sponge titanium Ti with a purity of 99.9%, grade 1 electrolytic nickel Ni with a purity of 99.9%, pure yttrium Y, pure cerium Ce, titanium vanadium alloy TiV and titanium niobium alloy TiNb according to the proportioning ratio.

[0014] 2. Press the titanium sp...

Embodiment 2

[0016] Embodiment 2, the fatigue performance test of a plate of a titanium-nickel shape memory alloy with high fatigue resistance of the present invention

[0017] In this embodiment, a plate of titanium-nickel shape memory alloy with high fatigue resistance of the present invention and a common titanium-nickel shape memory alloy are respectively selected for a comparative test of fatigue performance, and the schematic diagram of the test principle is referred to figure 2 .

[0018] Test material specifications: length 50mm, width 3mm, thickness 0.8mm.

[0019] The test process is as follows:

[0020] Clamp and fix the plates of a titanium-nickel shape memory alloy with high fatigue resistance of the present invention and a common titanium-nickel shape memory alloy at 30 mm from the test end, and swing back and forth at ±45° perpendicular to the length direction. The frequency is 10 round trips / minute, and the number of times the material finally fails or breaks is recorded...

Embodiment 3

[0024] Embodiment 3, the fatigue performance test of the wire material of a kind of high fatigue resistance titanium-nickel shape memory alloy of the present invention

[0025] In this embodiment, a high fatigue resistance titanium-nickel shape memory alloy of the present invention and a common titanium-nickel shape memory alloy wire are respectively selected for a comparative test of fatigue performance, and the schematic diagram of the test principle is referred to figure 2 .

[0026] Test material specifications: length 50mm, diameter 0.8mm.

[0027] The test process is as follows:

[0028] The wires of a titanium-nickel shape memory alloy with high fatigue resistance of the present invention and a common titanium-nickel shape memory alloy are respectively clamped and fixed at 30 mm from the test end, and are perpendicular to the length direction to swing back and forth at ±45°. The oscillation frequency is 10 times / minute, and the number of times the material finally fa...

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Abstract

The invention relates to high-fatigue resistance titanium-nickel shape memory alloy and a preparation method thereof. The main components of the high-fatigue resistance titanium-nickel shape memory alloy comprise 43.5-46.0wt% of titanium (Ti), 54.0-56.5wt% of nickel (Ni), 0.1-0.8wt% of yttrium (Y) and cerium (Ce) and 0.5-1.0wt% of vanadium (V) and niobium (Nb); impurities comprise smaller than or equal to 0.05wt% of carbon, smaller than or equal to 0.05wt% of oxygen and nitrogen, smaller than or equal to 0.005wt% of hydrogen, and smaller than or equal to 1.5wt% of other few added elements and inevitable impurities. The high-fatigue resistance titanium-nickel shape memory alloy has relatively high fatigue resistance, has a variety of industrial and medical applications, and is especially applicable to devices requiring relatively good fatigue resistance.

Description

technical field [0001] The invention relates to a titanium-nickel shape memory alloy, in particular to a titanium-nickel shape memory alloy with high fatigue resistance. Background technique [0002] Titanium-nickel shape memory alloys have been widely used in various medical devices and special industrial components due to their excellent biocompatibility, corrosion resistance, superelasticity, and especially shape memory properties. However, the titanium-nickel shape memory alloys in the prior art have relatively poor fatigue resistance. Taking the middle beam of glasses as an example, the middle beam of glasses made of titanium-nickel shape memory alloy in the prior art will be fatigue-fractured after being bent less than 1000 times. In terms of medical devices, taking the tracheal stent as an example, the titanium-nickel shape memory alloy tracheal stent implanted in the trachea often suffers from fatigue fracture 3 to 5 years after implantation, resulting in the loss o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/03
Inventor 王思泉周星
Owner 深圳市星河泉新材料有限公司
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