A dual-phase in-situ nano-reinforced titanium-based composite material and its preparation method

A titanium-based composite material and nano-enhanced technology, which is applied in the direction of additive processing, additive manufacturing, and process efficiency improvement, can solve problems such as easy contamination, reduced wettability, and difficult-to-form geometric structures, and achieve enhanced dislocations Strengthening effect, enhanced fine grain strengthening effect, effect of refining material structure

CN108004426BActive Publication Date: 2019-12-10HUAIYIN INSTITUTE OF TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2019-12-10

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Abstract

The invention discloses a two-phase in-situ nano-reinforced titanium-based composite material and a preparation method thereof. The preparation method is based on the in-situ reaction characteristics between titanium / aluminum and titanium / silicon, and utilizes the laser selective melting manufacturing technology, through the high-energy laser beam High temperature induction, promotes the chemical interaction between titanium / aluminum and titanium / silicon, and generates Ti in situ 3 Al and Ti 5 Si 3 Nano-reinforced phase; through the optimization of process conditions, the flow characteristics of the nano-reinforced phase in the micro-area molten pool are adjusted to promote the uniform dispersion of the nano-reinforced phase in the titanium alloy matrix, and then obtain Ti 3 Al and Ti 5 Si 3 Two-phase nanoceramic in situ dispersion reinforced titanium matrix composites. The preparation method of the present invention has simple process and low cost, is conducive to forming a good ceramic / titanium alloy metallurgical bonding interface, and significantly enhances the wetting performance of the ceramic / titanium alloy interface; at the same time, the double nano The reinforcing phase can effectively improve the comprehensive performance of titanium matrix composites.
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Description

technical field

[0001] The invention relates to a high-performance titanium-based nano-composite material and a preparation method thereof, in particular to a two-phase in-situ nano-reinforced titanium-based composite material and a preparation method thereof.

[0002] technical background

[0003] Due to its low density, high specific strength, strong corrosion resistance, and good biocompatibility, titanium alloys are widely used in aviation, aerospace, shipbuilding and ocean engineering, and biomedicine. However, a single titanium alloy is difficult to meet the application requirements. Ceramic particles have high hardness, high strength, and excellent wear resistance and corrosion resistance. They are ideal reinforcements for titanium-based composite materials, which can significantly improve the specific strength, wear resistance and other service performance of titanium alloys. Among them, nano-ceramic particles have large specific surface area, excellent mechanical pr...

Examples

Embodiment 1

[0027] Step (1): According to the mass ratio of spherical AlSi12 alloy powder and pure titanium powder dedicated to laser 3D printing to 1:99, weigh them respectively, wherein the particle size of the spherical pure titanium powder is 15-53 μm, the purity is 99.7%, and the particle size of the spherical AlSi12 alloy powder is The diameter is 10-30 μm, and the purity is 99.7%. Under the protection environment of high-purity argon gas with a purity of 99.99%, the high-energy ball milling process is used at a speed of 200rpm. Forward rotation ball milling for 10 minutes, intermittent air cooling for 5 minutes, followed by reverse ball milling for 10 minutes, Alternating 5 cycles, ball milling and mixing the spherical powder and then drying to obtain a uniformly mixed composite material forming powder;

[0028]Step (2): Place the uniformly mixed dry pure titanium-AlSi12 alloy composite material forming powder in the step (1) in the powder cylinder of the laser selective melting equ...

Embodiment 2

[0030] Different from Example 1, in this example, the titanium alloy is set as Ti in step (1) 6 Al 4 V, the mass ratio of spherical AlSi12 alloy powder to pure titanium powder is set to 1:54, the ball mill speed is set to 300rpm, and the energy density in step (2) is set to 200J / m 3 , other parameters are the same as in Example 1.

Embodiment 3

[0032] Different from embodiment 2, in this embodiment, the titanium alloy is set as Ti in step (1) 2 Al 1.5 Mn alloy, ball mill speed is set to 200rpm, the laser body energy density is set to 120J / m in step (2) 3 . Other parameters are identical with embodiment 2.