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Titanium-based composite material with multi-scale microstructure and preparation method of titanium-based composite material

A titanium-based composite material and microstructure technology, which is applied in the directions of additive manufacturing, additive processing, and process efficiency improvement, can solve problems such as pollution, complex powder spreading process, and complex process process, so as to meet the needs of use and improve stability. Sexual, easy-to-operate effects

Pending Publication Date: 2022-08-02
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the powder spreading process of this layered material is relatively complicated, and each layer of powder needs to be weighed and alternately laid. Due to the thin thickness of the powder layer, it is difficult to control the uniformity, which is not conducive to mass production and application.
The literature Composites Part B 231 (2022) 109564 reports a titanium-based composite material with a fiber-like structure. First, titanium alloy powder and titanium-based composite material powder are filled in different areas in a special mold, and the density reaches 80% of the block, and then the cold-pressed block is sintered by hot pressing to prepare a dense composite block, and finally the hot-pressed sintered block is hot-extruded and rolled to obtain a titanium-based composite with a fiber-like structure. Material rods; however, this method has the disadvantages of easy mutual contamination of the contact area of ​​the two powders, affecting the microstructure accuracy of the fibrous fibers, complex process flow, and difficulty in realizing large-scale blank preparation and large-scale industrial production, and its application is limited.

Method used

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  • Titanium-based composite material with multi-scale microstructure and preparation method of titanium-based composite material
  • Titanium-based composite material with multi-scale microstructure and preparation method of titanium-based composite material
  • Titanium-based composite material with multi-scale microstructure and preparation method of titanium-based composite material

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preparation example Construction

[0046] A second aspect of the present invention provides a preparation method of a titanium-based composite material with a multi-level scale microstructure, the preparation method comprising the steps of:

[0047] (1) Laser 3D printing the first spherical titanium-based powder to obtain a titanium-based frame;

[0048] (2) fully mixing the second spherical titanium-based powder with the ceramic powder, and leaving it to stand to obtain the titanium-based mixed powder;

[0049] (3) filling the titanium-based mixed powder into the titanium-based frame to obtain a powder-filled frame;

[0050] (4) The powder-filled frame is sintered and cooled by vacuum hot pressing to obtain a titanium-based composite material with a multi-scale microstructure filled with titanium-based reinforcing materials inside the titanium-based frame.

[0051] In the present invention, the first spherical titanium-based powder is prepared by laser 3D printing to prepare the titanium-based frame, and then...

Embodiment 1

[0074] (1) laser 3D printing TA15 (first spherical titanium-based powder) with a particle size of 30-53 μm to obtain a titanium-based frame (honeycomb TA15 titanium alloy frame);

[0075] (2) TA15 (second spherical titanium-based powder) with a particle size of 75-150 μm and 2wt% TiB with a particle size of 1-8 μm 2 (Ceramic powder) Carry out ball milling treatment under argon atmosphere for 5h, and continue to stand in the ball mill tank for 6h in argon atmosphere to obtain titanium-based mixed powder; wherein, the mass fraction of TA15 titanium alloy powder is 98wt%, TiB 2 The mass fraction is 2wt%, the rotating speed of ball milling is 200r / min, and the ratio of ball to material is 4:1;

[0076] (3) filling the titanium-based mixed powder into the titanium-based frame to obtain a powder-filled frame;

[0077] (4) Set the powder-filled frame at 1200℃, 22MPa and vacuum degree ≥1×10 -2 Vacuum hot-pressing sintering was carried out for 1.5 h in the environment of Pa to obtain...

Embodiment 2

[0080] (1) Laser 3D printing TA15 titanium alloy powder (first spherical titanium-based powder) with a particle size of 30-53 μm to obtain a titanium-based frame (honeycomb TA15 titanium alloy frame);

[0081] (2) TA15 titanium alloy powder (second spherical titanium-based powder) with a particle size of 75 to 150 μm and TiB with a particle size of 1 to 8 μm 2 (Ceramic powder) Perform ball milling for 4 hours in an argon atmosphere, and continue to stand in a ball mill for 6 hours in an argon atmosphere to obtain a titanium-based mixed powder; wherein, the mass fraction of the TA15 titanium alloy powder is 99 wt%, and the TiB 2 The mass fraction is 1wt%, the speed of ball milling is 180r / min, and the ratio of ball to material is 3:1;

[0082] (3) filling the titanium-based mixed powder into the titanium-based frame to obtain a powder-filled frame;

[0083] (4) Set the powder-filled frame at 1100℃, 20MPa and vacuum degree ≥1×10 -2 Vacuum hot-pressing sintering was carried out...

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Abstract

The invention provides a titanium-based composite material with a multi-scale microstructure and a preparation method of the titanium-based composite material. The titanium-based composite material with the multi-scale microstructure comprises a titanium-based frame and a titanium-based reinforcing material, the titanium-based reinforcing material is filled in the titanium-based frame; the titanium-based frame forms a first-level scale microstructure; and a ceramic reinforced phase in the titanium-based reinforced material forms a second-level scale microstructure. The first-level scale microstructure formed by the titanium-based frame in the prepared titanium-based composite material with the multi-level scale microstructure can effectively coordinate deformation and improve toughness; the ceramic reinforced phase distributed in a net-shaped structure in the titanium-based reinforced material forms a second-level scale microstructure, so that the strength of the titanium-based reinforced material can be improved.

Description

technical field [0001] The invention relates to the technical field of metal matrix composite materials, in particular to a titanium matrix composite material with a multi-scale microstructure and a preparation method thereof. Background technique [0002] The titanium-based composite material developed by introducing ceramic reinforcement into the titanium alloy matrix has the characteristics of light weight, high specific strength and high temperature resistance, and has a wide range of application prospects in the fields of aerospace and weaponry. The service life and other aspects are of great significance, but its plasticity and toughness need to be further improved. [0003] The existing technology mainly introduces the toughness micro-region of titanium alloy into the titanium-based composite material by powder metallurgy, and adjusts the micro-composite structure to achieve the purpose of toughening. Patent CN201710023739.8 discloses a method for preparing layered t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F7/06C22C1/08B22F10/28B22F3/14B33Y10/00B33Y70/00B33Y40/20B33Y80/00C22C14/00C22C32/00B22F1/12
CPCB22F7/002B22F10/28B22F3/14B33Y10/00B33Y70/00B33Y40/20B33Y80/00C22C14/00C22C32/0073B22F1/09B22F1/12Y02P10/25
Inventor 安琦黄陆军龚德龙熊少聪孟凡超张芮王存玉王帅耿林
Owner HARBIN INST OF TECH
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