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Preparation method of in-situ nano TiB whisker-reinforced Ti-based composite material

A titanium-based composite material and nanotechnology, which is applied in the directions of additive processing, additive manufacturing, and process efficiency improvement, can solve problems such as lack of performance advantages, and achieve improved nucleation rate, uniform distribution, and inhibition of columnar crystal formation. Effect

Inactive Publication Date: 2020-04-17
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are few research reports on titanium matrix composites formed by SLM, and pure titanium with low strength is mainly selected as the matrix material. Although its strengthening effect is significant, it has no advantage compared with the performance of SLM formed TC4, which limits its use. application

Method used

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  • Preparation method of in-situ nano TiB whisker-reinforced Ti-based composite material
  • Preparation method of in-situ nano TiB whisker-reinforced Ti-based composite material
  • Preparation method of in-situ nano TiB whisker-reinforced Ti-based composite material

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Embodiment 1

[0034] The present embodiment relates to a method for preparing an in-situ nano-TiB whisker-reinforced titanium-based composite material, wherein the volume fraction of TiB is 1%, including the following steps:

[0035] Step 1: Mix TC4 titanium alloy powder with a particle size of 15-53 μm and TiB with a particle size of 100 nm in a glove box 2 The particles are mixed and placed in a ball mill, and the ball mill is filled with argon as a protective gas, in which TiB 2 The mass fraction of 0.59%.

[0036] Step 2: place the ball milling jar containing the mixed powder on a planetary ball mill for short-time low-energy ball milling to prepare composite powder for SLM. The ball-milling medium is stainless steel balls, the ball-to-material ratio is 5:1, the ball-milling speed is 130rpm, and the ball-milling time is 2h.

[0037] Step 3: The above composite powder is used for SLM forming, and the model of the SLM forming equipment is EOS M290.

[0038] The specific SLM forming pro...

Embodiment 2

[0047] The present embodiment relates to a method for preparing an in-situ nano-TiB whisker-reinforced titanium-based composite material, wherein the volume fraction of TiB is 2%, including the following steps:

[0048] Step 1: Combine TC4 titanium alloy powder with a particle size of 15-53 μm and TiB with a particle size of 100 nm in a glove box 2 The particles are mixed and placed in a ball mill, and the ball mill is filled with argon as a protective gas, in which TiB 2 The mass fraction of 1.18%.

[0049] Step 2: place the ball milling jar containing the mixed powder on a planetary ball mill for short-time low-energy ball milling to prepare composite powder for SLM. The ball-milling medium is stainless steel ball, the ball-to-material ratio is 5:1, the ball-milling speed is 140rpm, and the ball-milling time is 2h.

[0050] Step 3: The above composite powder is used for SLM forming, and the model of the SLM forming equipment is EOS M290.

[0051] The specific SLM forming ...

Embodiment 3

[0063] The present embodiment relates to a method for preparing an in-situ nano-TiB whisker-reinforced titanium-based composite material, wherein the volume fraction of TiB is 3%, including the following steps:

[0064] Step 1: Mix TC4 titanium alloy powder with a particle size of 15-53 μm and TiB with a particle size of 100 nm in a glove box 2 The particles are mixed and placed in a ball mill, and the ball mill is filled with argon as a protective gas, in which TiB 2 The mass fraction of 1.76%.

[0065] Step 2: place the ball milling jar containing the mixed powder on a planetary ball mill for short-time low-energy ball milling to prepare composite powder for SLM. The ball-milling medium is stainless steel balls, the ball-to-material ratio is 5:1, the ball-milling speed is 150rpm, and the ball-milling time is 2h.

[0066] Step 3: The above composite powder is used for SLM forming, and the SLM forming equipment model is EOS M290.

[0067] The specific SLM forming process is a...

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Abstract

The invention discloses a preparation method of an in-situ nano TiB whisker-reinforced Ti-based composite material, and belongs to the technical field of Ti-based composite materials and additive manufacturing. The method includes the following steps that S1, nano TiB2 particles and micron-sized TC4 titanium alloy powder are selected and used, and the two kinds of powder are weighed in proportionin a glove box and are placed in a ball-milling tank; S2, mixed powder is placed on a planetary ball mill for short-time low-energy ball-milling, and composite powder with the nano TiB2 particles evenly inlaid on the surfaces of the TC4 titanium alloy powder is prepared; S3, the composite powder is used in selective laser melting (SLM) for forming preparation of the in-situ nano TiB whisker-reinforced Ti-based composite material; and S4, stress-relief annealing is performed on an SLM forming sample and a base plate in a vacuum sintering furnace, and then the sample is cut down from the base plate through wire cutting. The Ti-based composite material prepared with the method is obvious in grain refinement, the strength, the hardness and the wear resistance are remarkably improved, and thusthe composite material has the good application prospects in the fields of aerospace and the like.

Description

technical field [0001] The invention belongs to the technical field of titanium-based composite materials and additive manufacturing, and in particular relates to a preparation method of in-situ nano-TiB whisker-reinforced titanium-based composite materials. Background technique [0002] Titanium-based composites have higher specific strength and better wear resistance and high-temperature performance than titanium alloys. In aerospace, weaponry and other fields, they are one of the best candidate materials for improving mechanical properties, reducing weight and improving performance. . Among them, the in-situ self-generation method is to generate a reinforcing phase in the matrix through a chemical reaction, and a composite material with good interfacial bonding and clean and pollution-free can be obtained. Discontinuously reinforced titanium-based composites have the characteristics of isotropy and low cost, and have become the main research direction at present, especia...

Claims

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Application Information

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IPC IPC(8): B22F3/105B22F9/04B22F3/24C22C49/11C22C49/14C22C47/14B33Y10/00B33Y70/10C22C101/22
CPCB22F9/04B22F3/24C22C49/11C22C49/14C22C47/14B33Y10/00B33Y70/00B22F2003/248B22F2009/043B22F2998/10B22F10/00B22F10/362B22F10/64B22F10/28B22F12/60B22F12/226Y02P10/25
Inventor 刘允中周志光詹强坤王凯冬刘小辉
Owner SOUTH CHINA UNIV OF TECH