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Preparation method of titanium alloy with superelasticity and shape memory effect

A memory effect and superelasticity technology, applied in the field of titanium processing, can solve the problems of uneven composition of ingots, affect stability, uneven mixing, etc., achieve good superelasticity and shape memory effect, enhance activity, and accelerate melting speed. Effect

Active Publication Date: 2020-06-30
西安赛特新材料科技股份有限公司 +1
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AI Technical Summary

Benefits of technology

This technology allows for creating an improved material called tantalum pigment (TA) that can be used in various applications such as medical devices like stents made from this new type of material. By sintering raw materials together during production, these TA particles become tiny holes within which certain elements form solid solutions when they react chemically at high temperatures. These small holes help make it stronger than traditional methods without adding any other substance inside them. Overall, this innovation makes manufacturing processes faster while improving their quality control over existing products.

Problems solved by technology

This patented technical problem addressed in this patents relates to improving the quality control (QCA) process on producing highly specialized types of titania that can maintain their properties even after being exposed to harsh environments such as extreme temperatures over time without losing any significant amount of these elements.

Method used

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preparation example Construction

[0016] The invention discloses a method for preparing a titanium alloy with superelasticity and shape memory effect, which comprises the following steps:

[0017] First, using Ti powder and Ta powder as raw materials, the meshes of Ti powder and Ta powder are both greater than 200 meshes. The powder metallurgy method is used for powder mixing, isostatic pressing and sintering in order to prepare Ti-Ta master alloy; Ti-Ta master alloy is a bar material with an external dimension of (Φ40mm)×(250~280mm). Among them, when powder metallurgy is used for powder mixing, manual powder mixing and mechanical powder mixing are carried out sequentially, and the powder is manually mixed 3 to 6 times to eliminate the hardening and lumps in the powder. The mechanical powder mixing is 2~4h, and the V-type powder mixer is used, which is beneficial to realize the uniform mixing of the powder with a larger density difference. During vacuum sintering, the sintering temperature is 1100℃~1300℃, and th...

Embodiment 1

[0028] The preparation method of Ti-20Zr-10Ta (at%) alloy ingot: The raw materials are grade 0 or grade 1 sponge titanium, sponge zirconium, titanium powder, and tantalum powder. The particle size of sponge titanium and sponge zirconium is 3~12.7mm, and both titanium powder and tantalum powder are larger than 200 mesh. The alloy ratio is converted to a weight percentage of Ti-26Zr-26Ta (wt%) alloy. The Ti-Ta master alloy is prefabricated by powder metallurgy. The element ratio is Ti-75Ta (wt%), the unit weight is 4.4Kg, and the measured size is :Φ40mm×280mm. When the consumable electrode is fast pressed, 5.0Kg sponge titanium and 3.3Kg sponge zirconium are mixed, and then poured into the pressing mold twice, adding Ti-75Ta master alloy in the middle. The unit weight of the electrode is 12.7Kg, the external dimension is □100×300mm, that is, a square blank with a side length of 100mm and a length of 300mm. A total of 40 electrode blocks are pressed, and according to the actual ...

Embodiment 2

[0032] The preparation method of 46.5Ti-46.5Zr-7Ta(at%) alloy ingot: The raw materials are grade 0 or grade 1 sponge titanium, sponge zirconium, titanium powder, and tantalum powder. The particle size of sponge titanium and sponge zirconium is 3~12.7mm, and both titanium powder and tantalum powder are larger than 200 mesh. The alloy ratio is converted into a weight percentage of Ti-55Zr-16Ta (wt%) alloy, and the Ti-Ta master alloy is prefabricated by powder metallurgy. The element ratio is Ti-55Ta (wt%), the unit weight is 3.7Kg, and the measured size is Φ40mm×260mm. When the consumable electrode is fast pressed, 2.0Kg sponge titanium and 7.0Kg sponge zirconium are mixed, and then poured into the pressing mold twice, adding Ti-55Ta master alloy in the middle. The unit weight of the electrode is 12.7Kg, the external dimension is □100×300mm, that is, a square blank with a side length of 100mm and a length of 300mm. . A total of 40 electrode blocks are pressed, and according to...

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Abstract

The invention discloses a manufacturing method of a titanium alloy with superelasticity and shape memory effect. According to the manufacturing method, Ti powder and Ta powder are adopted as raw materials to be subjected to powder mixing, isostatic pressing and sintering in sequence according to a powder metallurgy method to obtain a Ti-Ta intermediate alloy, specifically, according to the powdermetallurgy method, the Ti powder and the Ta powder are mixed manually three to six times and mixed mechanically for 2-4 h in sequence, and during vacuum sintering, the sintering temperature is 1,100-1,300 DEG C and is kept for 2-4 hours; the Ti-Ta intermediate alloy and a mixture are pressed to obtain electrode blocks, wherein the mixture consists of grade 0 or 1 of titanium sponge particles and industrial-grade HZr-1 sponge zirconium particles; a plurality of the electrode blocks are subjected to group welding to form consumable electrodes, and then, vacuum consumable smelting is carried outon the consumable electrodes at least four times to obtain a Ti-Zr-Ta alloy ingot casting. According to the manufacturing method, the superelasticity and shape memory effect of the titanium alloy canbe adjusted by controlling the phase transition temperature range and the stability of the titanium alloy.

Description

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Claims

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Application Information

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Owner 西安赛特新材料科技股份有限公司
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