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Dual-phase in-situ nano-enhanced ti-based composite material and preparing method thereof

A titanium-based composite material, nano-reinforced technology, applied in the direction of additive processing, additive manufacturing, process efficiency improvement, etc., can solve the problems of easy pollution, reduced wettability, large energy consumption, etc., to achieve enhanced dislocation strengthening effect, enhanced fine-grain strengthening effect, and the effect of improving mechanical properties

Active Publication Date: 2018-05-08
HUAIYIN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The external addition method mainly has the following deficiencies: (1) the reinforcement phase particles are pre-made, and the size is relatively large, and the nano-ceramic particles are usually easy to agglomerate and difficult to effectively disperse; (2) the nano-ceramic reinforcement has strong activity and is easy to disperse. Contaminated, thereby reducing the wettability with the titanium alloy melt; (3) Compared with micron ceramic particles, the cost of nano ceramic particles is higher
These methods have enhanced the wetting performance between ceramics and titanium alloy substrates to a certain extent, but there are also the following technical difficulties: (1) Generally, ceramics generated by means of in-situ reactions require higher processing temperatures, especially double The formation of nano-phase ceramic particles is more likely to cause high forming temperature, high mold cost, and large energy consumption brought by traditional preparation processes such as smelting and powder metallurgy; (2) The existing preparation processes such as vacuum smelting and powder metallurgy only rely on macroscopic Mechanical or electromagnetic agitation, it is difficult to effectively disperse the nano-ceramic reinforcement phase generated in situ, and it is easy to bring about the agglomeration of ceramic phases and coarse grains, resulting in a decline in material performance; (3) a single preparation process such as melting casting or powder metallurgy, etc. It is impossible to obtain products that match the size, shape and performance, and usually requires secondary forming (extrusion, forging, etc.) At the same time, with the introduction of highly brittle ceramic particles, the deformation resistance increases sharply, high temperature deformation is prone to local plastic rheology, it is difficult to form components with complex geometric structures, and the thermal secondary processing of titanium matrix composites is significantly increased. difficulty

Method used

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  • Dual-phase in-situ nano-enhanced ti-based composite material and preparing method thereof
  • Dual-phase in-situ nano-enhanced ti-based composite material and preparing method thereof
  • Dual-phase in-situ nano-enhanced ti-based composite material and preparing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] 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, 5 cycles of alternating cycles, ball milling and mixing the spherical powder and then drying to obtain a uniformly mixed composite material forming powder;

[0027]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 m...

Embodiment 2

[0029] 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

[0031] 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.

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Abstract

The invention discloses a dual-phase in-situ nano-enhanced ti-based composite material and a preparing method thereof. The preparing method is based on titanium / aluminum and titanium / silicon in-situ reaction characteristics, a laser selective fusion manufacturing technology is used, through the high energy laser beam high temperature inducing effect, titanium / aluminum and titanium / silicon chemicalaction is promoted, and in-situ reaction of Ti3Al and Ti5Si3 nano-enhanced phases is achieved; through technological condition optimization, the flow characteristic of the microcell molten bath nano-enhanced phases is regulated and controlled, homodisperse of the nano-enhanced phases in a titanium alloy base is promoted, and the Ti3Al and Ti5Si3 dual-phase nano ceramic in-situ scattered reinforced titanium matrix composite material is further obtained. According to the preparation method, the process method is simple, the cost is low, the good ceramic / titanium alloy metallurgical bonding interface is better formed, and the wettability of the ceramic / titanium alloy interface is obviously strengthened; and meanwhile, the dual nano-enhanced phases evenly dispersed into the titanium alloy base can effectively improve the comprehensive performance of the ti-based composite material.

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. technical background [0002] 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 properties...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/04B22F3/105B33Y70/00B33Y10/00
CPCC22C1/0458B33Y10/00B33Y70/00B22F10/00B22F10/362B22F10/36B22F10/34B22F10/28B22F10/32C22C1/047Y02P10/25
Inventor 夏木建李年莲刘爱辉林岳宾陈中丁红燕张满
Owner HUAIYIN INSTITUTE OF TECHNOLOGY
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