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Low-elasticity-modulus zirconium alloy and preparation method and application thereof

A low elastic modulus, zirconium alloy technology, applied in the field of alloys, can solve the problems of high elastic modulus, high raw material cost, and low strength of zirconium alloys

Inactive Publication Date: 2021-11-05
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at present, zirconium alloys in the biomedical field still have many problems, such as low strength and high elastic modulus.
For example, the Zr-Nb system in the zirconium alloy system is a typical alloy system. In the prior art, the yield strength of the Zr-Nb system alloy is usually only about 400MPa, which is low in strength, and at the same time, the elastic modulus of the zirconium alloy is relatively high.
Zirconium alloys with low elastic modulus often have the problem of high cost. For example, Chinese patent application CN110408815A discloses a low elastic modulus, biomedical low elastic modulus amplitude modulation decomposition type Zr-Nb-Ti alloy material and its preparation method, but the content of niobium in the alloy is 15-45%, and the cost of raw materials is relatively high

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  • Low-elasticity-modulus zirconium alloy and preparation method and application thereof

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preparation example Construction

[0038] The present invention also provides a method for preparing the low elastic modulus zirconium alloy described in the above technical solution, comprising the following steps:

[0039] providing an alloy ingot having a chemical composition consistent with that of a low elastic modulus zirconium alloy;

[0040] Annealing the alloy ingot to obtain the low elastic modulus zirconium alloy.

[0041] The present invention provides an alloy ingot having a chemical composition consistent with that of a low elastic modulus zirconium alloy.

[0042] In the present invention, the method for preparing the alloy ingot preferably includes: sequentially melting and cooling alloy raw materials to obtain the alloy ingot.

[0043] In the present invention, the alloy raw materials are preferably zirconium sponge, pure niobium wire and pure tin particles; the zirconium sponge contains hafnium. The present invention adopts zirconium sponge containing hafnium, that is, no purification of zir...

Embodiment 1

[0060] The chemical composition of the designed low elastic modulus zirconium alloy is Zr-0.6Nb-0.5Sn-4.4Hf, that is, Nb 0.6%, Sn 0.5%, Hf 4.4%, the balance is Zr and unavoidable impurities;

[0061] According to the chemical composition of the designed low elastic modulus zirconium alloy, place the alloy raw material in absolute ethanol for ultrasonic cleaning, air-dry, mix, place in a water-cooled copper crucible, and place in a non-consumable vacuum arc melting furnace. Vacuum inside to 5×10 -3 Pa, then filled with argon, the vacuum degree is 5×10 -3 Pa, the pressure is 0.04 ~ 0.05MPa under the condition of argon gas for non-consumable arc melting, wherein, the melting temperature is 2400 ℃, the current is 420A during the melting process, and the single melting time is 4min. After cooling after melting, the obtained billet is Carry out overturning, carry out next non-consumable arc smelting processing, carry out 6 times of non-consumable arc smelting altogether, obtain al...

Embodiment 2

[0066] The chemical composition of the designed low elastic modulus zirconium alloy is Zr-3Nb-1Sn-4.2Hf, that is, Nb 3%, Sn 1%, Hf 4.2%, the balance is Zr and unavoidable impurities in terms of mass percentage;

[0067] According to the chemical composition of the designed low elastic modulus zirconium alloy, place the alloy raw material in absolute ethanol for ultrasonic cleaning, air-dry, mix, place in a water-cooled copper crucible, and place in a non-consumable vacuum arc melting furnace. Vacuum inside to 5×10 -3 Pa, then filled with argon, the vacuum degree is 5×10 -3 Pa, the pressure is 0.04 ~ 0.05MPa under the condition of argon gas for non-consumable arc melting, wherein, the melting temperature is 2400 ℃, the current is 420A during the melting process, and the single melting time is 4min. After cooling after melting, the obtained billet is Carry out overturning, carry out next non-consumable arc smelting processing, carry out 6 times of non-consumable arc smelting al...

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Abstract

The invention belongs to the technical field of alloys, and particularly relates to a low-elasticity-modulus zirconium alloy and a preparation method and application thereof. The low-elasticity-modulus zirconium alloy comprises the following elements, by mass, 0.5-15% of Nb, 0.5-5% of Sn, 0.1-4.5% of Hf and the balance Zr. According to the low-elasticity-modulus zirconium alloy, Nb has a solid solution strengthening effect, so that the strength of the zirconium alloy can be remarkably improved, and the content of the beta phase in the zirconium alloy can be controlled, and thus the elastic modulus of the zirconium alloy can be reduced; by strictly controlling the contents of all the elements and utilizing alloying, Nb and Zr form a solid solution, and solid solution strengthening is achieved; and Sn and Hf belong to neutral elements, the solid solution strengthening effect in the alpha phase and the beta phase is obvious, and the elastic modulus of the zirconium alloy is reduced on the basis of guaranteeing the strength of the zirconium alloy through cooperation of all the elements. In addition, the content of Nb in the zirconium alloy is low, and it is beneficial to reduce the cost of the zirconium alloy.

Description

technical field [0001] The invention belongs to the technical field of alloys, in particular to a zirconium alloy with a low elastic modulus and its preparation method and application. Background technique [0002] Zirconium has excellent biocompatibility and is widely used in biomedical fields. However, zirconium alloys in the biomedical field still have many problems, such as low strength and high elastic modulus. For example, the Zr-Nb system in the zirconium alloy system is a typical alloy system. In the prior art, the yield strength of the Zr-Nb alloy is usually only about 400 MPa, which is low in strength, and at the same time, the elastic modulus of the zirconium alloy is relatively high. Zirconium alloys with low elastic modulus often have the problem of high cost. For example, Chinese patent application CN110408815A discloses a low elastic modulus, biomedical low elastic modulus amplitude modulation decomposition type Zr-Nb-Ti alloy material and its preparation me...

Claims

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Application Information

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IPC IPC(8): C22C16/00C22C1/02C22F1/18C22F1/02A61L27/04
CPCC22C16/00C22C1/02C22F1/186C22F1/02A61L27/047
Inventor 刘日平姬朋飞李波陈博涵逯昊燃石鹤洋马明臻张新宇
Owner YANSHAN UNIV