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Quick formation method of titanium-based composite material having bionic shell structure

A titanium-based composite material and shell technology, which is applied in the directions of additive processing, process efficiency improvement, additive manufacturing, etc., to achieve the effect of broadening the scope of preparation and application, tight interlayer bonding, and breaking through weak interlayer bonding.

Active Publication Date: 2018-09-07
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it should be pointed out that the shell-like structure composed of a mixture of network structure and layered structure requires tight interlayer bonding, and the hot pressing sintering method and diffusion bonding method have technological limitations to a certain extent.

Method used

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  • Quick formation method of titanium-based composite material having bionic shell structure

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Experimental program
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Effect test

Embodiment 1

[0018] Using pure titanium wire and boronized pure titanium wire (0.5wt.% boron content) as raw materials, respectively put the titanium wire and boronized titanium wire into the wire feeding mechanism of the electron beam fuse forming equipment. Then adjust the wire feeding mechanism to ensure that the titanium wire intersects with the boronized titanium wire; then deflect the electron beam so that the beam spot of the electron beam coincides with the intersection point of the wire material to ensure that the wire material is accurately fed into the molten pool. Finally, through computer programming, boronized titanium wires and titanium wires are alternately deposited according to a predetermined path until the bionic shell structure titanium-based composite material is deposited. The specific process parameters of pure titanium wire electron beam fuse deposition process are: fuse current 12mA, voltage 60kV, travel speed 200mm / min, wire feeding speed 2r / min, vacuum degree bet...

Embodiment 2

[0020] The difference between this embodiment and Embodiment 1 is that the wire material is TC4 titanium wire and boronized titanium alloy wire (0.5 wt.% boron content). The specific process parameters of TC4 titanium wire electron beam fuse deposition process are: fuse current 13mA, voltage 60kV, travel speed 200mm / min, wire feeding speed 2r / min, vacuum degree better than 5×10 -2 Pa. The specific process parameters of the boronizing titanium alloy wire electron beam fuse deposition process are: fuse current 16mA, voltage 60kV, travel speed 200mm / min, wire feeding speed 2r / min, vacuum degree better than 5×10 -2 Pa. The tensile strength of the biomimetic shell structure titanium-based composite material with each layer thickness of 0.5mm is 933MPa, and the elongation is 11.3%.

Embodiment 3

[0022] The difference between this embodiment and Embodiment 1 is that the wire material is TC4 titanium wire and boronized titanium alloy wire (0.8 wt.% boron content). The specific process parameters of TC4 titanium wire electron beam fuse deposition process are: fuse current 14mA, voltage 60kV, travel speed 200mm / min, wire feeding speed 2r / min, vacuum degree better than 5×10 -2 Pa. The specific process parameters of boronizing titanium alloy wire electron beam fuse deposition process are: fuse current 18mA, voltage 60kV, travel speed 200mm / min, wire feeding speed 2r / min, vacuum degree better than 5×10 -2 Pa. The tensile strength of the biomimetic shell structure titanium-based composite material with each layer thickness of 0.5mm is 941MPa, and the elongation is 10.1%.

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Abstract

The invention relates to a quick formation method of a titanium-based composite material having a bionic shell structure. By mainly using a titanium wire and a boriding titanium wire as raw materialsand utilizing double wire feeding mechanisms, alternate deposition on the boriding titanium wire and the titanium wire is carried out through an electronic beam fused deposition technology. Accordingto the quick formation method of the titanium-based composite material having the bionic shell structure disclosed by the invention, the titanium-based composite material having the bionic shell structure, prepared by mixing a net structure and a layered structure, can be obtained; and the titanium-based composite material is high in toughness. Moreover, the process has the advantages of strong applicability and short technological processes, and in addition, preparation and application ranges of the titanium-based composite material are greatly widened.

Description

technical field [0001] The invention relates to the field of metal-based composite materials, in particular to a rapid prototyping method for bionic shell structure titanium-based composite materials. Background technique [0002] Titanium matrix composites (TMCs) not only have high specific strength, low density and other characteristics, but also have higher elastic modulus, stiffness and excellent wear resistance and high temperature creep resistance due to the addition of reinforcing phases. Become a key candidate material for a new generation of advanced aerospace equipment. However, the enhancement of high brittleness also causes serious deterioration of material toughness, and even exhibits great room temperature brittleness, which cannot meet the requirements of harsh service environments and has become a bottleneck restricting its development. Studies have shown that shells not only have extremely high strength but also have good toughness, which is mainly related ...

Claims

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Application Information

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IPC IPC(8): B22F3/105B33Y10/00B33Y70/00
CPCB33Y10/00B33Y70/00B22F10/00B22F10/25B22F10/36Y02P10/25
Inventor 姚正军陶学伟张莎莎刘莹莹王晗
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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