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Enhanced titanium-based composite material and powder metallurgy preparation method thereof

A titanium-based composite material and powder metallurgy technology, applied in the field of composite materials and their preparation, to achieve the effect of reducing energy consumption, reducing production links, and combining well

Inactive Publication Date: 2014-01-01
GUANGZHOU RES INST OF NON FERROUS METALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report on the preparation of TiB and rare earth oxide reinforced titanium matrix composites by forming titanium matrix mixed powder by high speed pressing technology in the world.

Method used

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  • Enhanced titanium-based composite material and powder metallurgy preparation method thereof
  • Enhanced titanium-based composite material and powder metallurgy preparation method thereof
  • Enhanced titanium-based composite material and powder metallurgy preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Weigh 5-10μm TiB according to the mass ratio 2 2.0%, 10~25μm LaB 6 0.9%, Ti powder 85.0%, Al powder 4.3%, Mo powder 6.4% and Fe powder 1.4%. The powder was placed in a ball mill, protected by an Ar atmosphere, and ball milled for 6 hours to mix the powder evenly. The impact velocity is 4.50m / s, and the ratio of impact energy to powder loading is 1370J: 10g high-speed pressing mixed powder to prepare a green body, put the green body into a vacuum sintering furnace at 1150-1350°C, sinter for 3 hours, and finally Furnace cools. The reinforced phase volume fraction of the obtained reinforced titanium matrix composite is 5.5% (TiB+La 2 o 3 ) / Ti-4.5Al-6.8Mo-1.5Fe(TiB:La 2 o 3 =10:1), the properties are shown in Table 1.

[0021] Table 1

[0022] Sintering temperature / ℃

Embodiment 2

[0024] Weigh 5-10μm TiB according to the mass ratio 2 4.9%, 10~25μm LaB 6 0.9%, Ti powder 82.8%, Al powder 4.0%, Mo powder 6.1% and Fe powder 1.3%. The powder was placed in a ball mill, protected by an Ar atmosphere, and ball milled for 6 hours to mix the powder evenly. The impact velocity is 4.98m / s, the ratio of impact energy to powder loading is 1780J: 13g, and the mixed powder is pressed at high speed to prepare a green body. Furnace cools. The reinforced phase volume fraction of the resulting reinforced titanium matrix composite is 10.5% (TiB+La 2 o 3 ) / Ti-4.5Al-6.8Mo-1.5Fe(TiB:La 2 o 3 =20:1), the properties are shown in Table 2.

[0025] Table 2

[0026] Sintering temperature / ℃

Embodiment 3

[0028] Weigh 5-10μm TiB according to the mass ratio 2 7.8%, 10~25μm LaB 6 0.9%, Ti powder 80.5%, Al powder 3.8%, Mo powder 5.7% and Fe powder 1.3%. The powder was placed in a ball mill, protected by an Ar atmosphere, and ball milled for 6 hours to mix the powder evenly. The impact velocity is 5.31m / s, the ratio of impact energy to powder loading is 2191J: 16g, and the mixed powder is pressed at high speed to prepare a green body. Furnace cools. The reinforced phase volume fraction of the resulting reinforced titanium matrix composite is 15.5% (TiB+La 2 o 3 ) / Ti-4.5Al-6.8Mo-1.5Fe(TiB:La 2 o 3 =30:1), the properties are shown in Table 3.

[0029] table 3

[0030] Sintering temperature / ℃

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Abstract

The invention discloses an enhanced titanium-based composite material, which is characterized by comprising the following components by weight: 1.0-11.0% of TiB2 with the grain size of 5-10 microns, 0.8-1.0% of rare earth metal hexaboride with the grain size of 10-25 microns, 75.0-85.0% of titanium powder, 3.5-4.5% of Al powder, 5.0-7.0% of Mo powder and 1.0-1.5% of Fe powder. According to the invention, a powder metallurgy preparation method of the enhanced titanium-based composite material comprises the following steps: uniformly mixing TiB2, rare earth metal hexaboride, titanium powder, Al powder, Mo powder and Fe powder; pressing to a blank under the conditions that the impact speed is 4.50-6.28 m / s, and the ratio of impact energy to powder loading capacity is 1370-2602 J: 10-19 g; and sintering to the blank in vacuum to obtain the enhanced titanium-based composite material. The enhanced titanium-based composite material provided by the invention is a material with high sintering compactness, high hardness and high bend strength. The enhanced titanium-based composite material prepared by the method has the advantages of simple process, low cost and capability of reducing production steps and reducing energy consumption, and is suitable for mass production.

Description

technical field [0001] The invention relates to a composite material and a preparation method thereof, in particular to a reinforced titanium-based composite material and a powder metallurgy preparation method thereof. Background technique [0002] Particle-reinforced titanium-based composite material is a material prepared with high-strength and high-modulus ceramic particles or whiskers as the reinforcing phase and titanium or titanium alloy as the matrix. It has higher specific strength and specific modulus than titanium alloys. , excellent fatigue and creep properties, as well as excellent high temperature resistance and corrosion resistance, and overcome the shortcomings of poor wear resistance and flame resistance of titanium alloys, and have been widely used in aerospace, automotive, medical equipment and other fields. Compared with the external addition method, the in-situ synthesis of reinforcement phase has the characteristics of simple process, good wettability be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C14/00C22C1/05
Inventor 陈峰闫志巧蔡一湘郑玉凯
Owner GUANGZHOU RES INST OF NON FERROUS METALS