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Preparation method of high-strength high-elasticity modulus titanium matrix composite

A titanium-based composite material and high-elasticity technology, which is applied in the field of preparation of high-strength and high-elastic-modulus titanium-based composite materials, can solve the problems of poor rigidity, thick and heavy, and easy deformation of titanium alloys, so as to improve plasticity and strength. , boron and carbon have less volatilization effect

Inactive Publication Date: 2015-06-10
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Make the structural parts designed according to the stiffness appear thicker and bulkier than the parts designed according to the strength
For slender and thin-walled parts, due to the poor rigidity of titanium alloys, they are easily deformed during use, so how to improve the comprehensive performance of titanium alloys has been a concern of researchers.

Method used

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  • Preparation method of high-strength high-elasticity modulus titanium matrix composite
  • Preparation method of high-strength high-elasticity modulus titanium matrix composite
  • Preparation method of high-strength high-elasticity modulus titanium matrix composite

Examples

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Effect test

Embodiment 1

[0036] The high-strength and high-elastic-modulus titanium-based composite material of this embodiment is composed of the following components in mass percentage: Al6.0%, V4.0%, Y0.15%, B0.5%, C0.5%, The balance is titanium and unavoidable impurities.

[0037] The preparation method of the titanium-based composite material of the present embodiment is:

[0038] Step 1. Mix and press the sponge titanium and boron to form an electrode block, then place the electrode block in a vacuum electric arc furnace and smelt it twice to obtain a Ti-5B alloy ingot, and then turn the Ti-5B alloy ingot turning chips into The Ti-5B master alloy is obtained by chipping or breaking into granules; the process parameters of the first melting are as follows: the melting current is 1200A, the voltage is 25V, and the vacuum degree is 6.5×10 -2 Pa; the process parameters of the second smelting are: the melting current is 2000A, the voltage is 25V, and the vacuum degree is 6.5×10 -3 Pa;

[0039] Ste...

Embodiment 2

[0045] The high-strength and high-elastic-modulus titanium-based composite material of this embodiment is composed of the following components in mass percentage: Al6.0%, V4.0%, Y0.1%, B0.5%, C0.5%, The balance is titanium and unavoidable impurities.

[0046] The preparation method of the titanium-based composite material in this example is the same as that in Example 1.

[0047] The microstructure grains of the titanium-based composite material in this example are obviously refined, and its microstructure consists of α phase (lamellar or spherical), grain boundary β phase, short rod-shaped second phase TiB phase, and irregular spherical The second phase TiC phase composition is granular and embossed.

Embodiment 3

[0049] The high-strength and high-elastic-modulus titanium-based composite material of this embodiment is composed of the following components in mass percentage: Al6.0%, V4.0%, Y0.18%, B0.5%, C0.5%, The balance is titanium and unavoidable impurities.

[0050] The preparation method of the titanium-based composite material in this example is the same as that in Example 1.

[0051] The microstructure grains of the titanium-based composite material in this example are obviously refined, and its microstructure consists of α phase (lamellar or spherical), grain boundary β phase, short rod-shaped second phase TiB phase, and irregular spherical The second phase TiC phase composition is granular and embossed.

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Abstract

The invention discloses a preparation method of a high-strength high-elasticity modulus titanium matrix composite. The high-strength high-elasticity modulus titanium matrix composite is composed of the following components by mass percent: 5.5%-6.5% of Al, 3.5%-5.5% of V, 0.1%-0.2% of Y, 0.2%-2.0% of B, 0.2%-2.0% of C and the balance of titanium and inevitable impurities; the preparation method comprises the following steps of: 1, preparing a TiB intermediate alloy; 2, preparing a TiC intermediate alloy; 3, mixing sponge titanium, aluminium shot, yttrium and AlV alloy with the TiB intermediate alloy and the TiC intermediate alloy, and pressing the mixture into an electrode block, pre-smelting and repeatedly smelting; 4, casting rods; and 5, carrying out hot isostatic pressing treatment. The preparation method has the advantages that the intermediate alloys are prepared so that the volume fraction and the distribution of the wild phases TiB and TiC can be controlled, and therefore, the structure and performance of the composite can be controlled, and the components of the composite are even through pre-smelting and re-smelting.

Description

technical field [0001] The invention belongs to the technical field of preparation of titanium-based composite materials, and in particular relates to a preparation method of high-strength and high-elastic-modulus titanium-based composite materials. Background technique [0002] Titanium alloy has low density, high specific strength, strong corrosion resistance, and good high-temperature and low-temperature mechanical properties. It is an excellent structural material and has been widely used in aviation, aerospace, military, civil and other fields. With the development of aviation, aerospace and cutting-edge weapons, titanium alloy castings are used more and more. Especially in recent years, the development of titanium precision casting technology has made it possible to mass-cast and produce some equipment parts with complex structures. The use of this near net shape technology can improve the utilization rate of materials, shorten the production cycle, and greatly reduce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C14/00C22C1/03C22C1/10
Inventor 戚运莲曾立英侯智敏赵彬洪权毛小南赵军刘时兵谢华生
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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