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A kind of high-strength titanium alloy and preparation method thereof

A titanium alloy, high-strength technology, applied in the field of high-strength titanium alloy and its preparation, can solve the problems of high cost, harsh process requirements, cumbersome preparation procedures, etc., and achieve the effect of low cost, simple operation process and convenient preparation process

Active Publication Date: 2019-07-26
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the strength of traditional titanium alloys is difficult to meet the development needs of industrial production and national defense at the present stage. Titanium alloys are mostly strengthened by deformation strengthening methods, and the preparation procedures are cumbersome, demanding processes, and high cost.

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  • A kind of high-strength titanium alloy and preparation method thereof
  • A kind of high-strength titanium alloy and preparation method thereof
  • A kind of high-strength titanium alloy and preparation method thereof

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preparation example Construction

[0027] The present invention also provides a method for preparing the high-strength titanium alloy described in the above technical solution, comprising the following steps:

[0028] (1) Obtain the as-cast alloy billet after melting the alloy raw material;

[0029] (2) Annealing the as-cast alloy billet obtained in the step (1) to obtain a high-strength titanium alloy.

[0030] In the invention, the alloy raw material is smelted to obtain the cast alloy billet. In the present invention, there is no special limitation on the type of the alloy raw material, and the alloy raw material well-known to those skilled in the art is used to obtain the titanium alloy with the target composition. In the present invention, the alloy raw materials preferably include zirconium sponge, titanium wire, pure tin and pure aluminum. In the present invention, there is no special limitation on the ratio of various alloy raw materials, as long as the final alloy composition can meet the requirement...

Embodiment 1

[0039] According to the alloy composition Ti-10Zr-5Al-2.5Sn (mass percentage) ingredients, take industrial grade sponge zirconium, titanium wire (99.9wt.%), aluminum wire (99.7wt.%), pure tin (99.8wt.%) In anhydrous ethanol, after ultrasonic cleaning, air-dry, put it into a water-cooled copper crucible in a non-consumable vacuum arc melting furnace. The inner wall of the copper crucible should be cleaned and wiped clean in advance to avoid bringing in other impurities. The vacuum should be pumped to 8×10-3 Below Pa, after filling high-purity argon as a protective gas (vacuum degree 0.04-0.05MPa) before arc melting, the arc temperature is about 2000°C during each melting, and the melting time is about 4 minutes each time to ensure the composition Uniform, after each smelting, the ingot is cooled to obtain an ingot, and then the ingot is turned over for smelting, so that the smelting-casting ingot is repeatedly smelted and turned over 6 times to ensure that the finally obtained i...

Embodiment 2

[0044] According to the alloy composition Ti-30Zr-5Al-2.5Sn (mass percentage) ingredients, take industrial grade sponge zirconium, titanium wire (99.9wt.%), aluminum wire (99.7wt.%), pure tin (99.8wt.%) In anhydrous ethanol, after ultrasonic cleaning, air-dry, put it into a water-cooled copper crucible in a non-consumable vacuum arc melting furnace. The inner wall of the copper crucible should be cleaned and wiped clean in advance to avoid bringing in other impurities. The vacuum should be pumped to 8×10 -3 Below Pa, after filling high-purity argon as a protective gas (vacuum degree 0.04-0.05MPa) before arc melting, the arc temperature is about 2000°C during each melting, and the melting time is about 4 minutes each time to ensure the composition Uniform, after each smelting, the ingot is cooled to obtain an ingot, and then the ingot is turned over for smelting, so that the smelting-casting ingot is repeatedly smelted and turned over 6 times to ensure that the finally obtained...

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Abstract

The invention provides a high-temperature titanium alloy and a preparation method of the high-temperature titanium alloy. The high-temperature titanium alloy is prepared from, by mass, 4-6% of Al, 2-3% of Sn, 5-50% of Zr and the balance Ti. The content of the elements is strictly controlled, the neutral elements Zr and Ti having not high influences on the phase change temperature form an infinitesolid solution through alloying, and therefore solution strengthening is achieved. The titanium alloy preparation process is easy and convenient, the mechanical property of the titanium alloy is improved by controlling the content of the elements, the strength of the titanium alloy is remarkably improved, and therefore the requirements of aviation components are met. According to the high-strengthtitanium alloy, the yield strength is improved to reach up to 50.0%, the tensile strength is improved to reach up to 50.1%, and the strength is greatly improved; the elongation is kept in a corresponding level; and the yield strength and the tensile strength are both improved, the plasticity declining degree is low, and the obdurability is improved.

Description

technical field [0001] The invention relates to the technical field of titanium alloys, in particular to a high-strength titanium alloy and a preparation method thereof. Background technique [0002] Titanium and titanium alloys are widely used in marine engineering, aerospace, biomedical engineering, metallurgy, chemical industry, light industry and many other fields. With the widespread application of titanium and titanium alloys, the development of industry and the service environment have put forward more stringent requirements on the performance of titanium alloys. It is difficult for traditional titanium alloys to meet the current engineering application standards in terms of strength and corrosion resistance. The high-strength titanium corrosion-resistant alloy is one of the key directions of research, development and application at present. [0003] Due to its high strength, good formability, welding performance and stable structure, titanium alloys are mostly stamp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C14/00C22C16/00C22C30/04C22C1/02C22F1/18
CPCC22C1/02C22C14/00C22C16/00C22C30/04C22F1/183C22F1/186
Inventor 刘日平马巍刘曙光王飞马明臻景勤张新宇
Owner YANSHAN UNIV