In-situ metal ceramic multi-material preparation method based on powder bed melting

A cermet, multi-material technology, applied in additive manufacturing, additive processing, etc., can solve problems such as low efficiency, layering, and complicated powder operations, and achieve the effect of avoiding complicated operations and reducing costs.

Pending Publication Date: 2022-07-29
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides an in-situ cermet multi-material preparation method based on powder bed fusion, the purpose of which is to print by adjusting the cavity atmosphere in the additive manufacturing process, thereby Solve the technical problems of complex powder replacement operations, low efficiency, large differences in properties between metals and ceramics, and easy cracking and delamination of formed parts

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  • In-situ metal ceramic multi-material preparation method based on powder bed melting

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Embodiment 1

[0029] The present embodiment provides an in-situ cermet multi-material preparation method based on powder bed fusion, comprising the following steps:

[0030] (1) Use 3D modeling software to model and design the cermet multi-material parts to be formed, export them to stl format, and input them into the powder bed fusion system.

[0031] Among them, the three-dimensional model of the part is figure 1 As shown, the metal area 1 and the ceramic area 2 belong to the same part as a whole.

[0032] (2) The powder used in multi-material printing is metal alloy powder, then the substrate is sandblasted, and then a layer of metal alloy powder is pre-laid on the substrate. The metal alloy powder is magnesium alloy powder, the average particle size is 40 μm, and the sphericity is 99.9%. The thickness of the layer of metal alloy powder is 50 μm.

[0033] (3) Along the printing direction, determine whether the area to be printed is a metal area or a ceramic area. If it is a metal area...

Embodiment 2

[0039] The present embodiment provides an in-situ cermet multi-material preparation method based on powder bed fusion, comprising the following steps:

[0040] (1) Use 3D modeling software to model and design the cermet multi-material parts to be formed, export them to stl format, and input them into the powder bed fusion system.

[0041] Among them, the three-dimensional model of the part is figure 1 As shown, the metal area 1 and the ceramic area 2 belong to the same part as a whole.

[0042] (2) The powder used in multi-material printing is metal alloy powder, then the substrate is sandblasted, and then a layer of metal alloy powder is pre-laid on the substrate. The metal alloy powder is a titanium alloy powder with an average particle size of 53 μm and a sphericity of 99.9%. The thickness of the layer of metal alloy powder is 50 μm.

[0043] (3) Along the printing direction, determine whether the area to be printed is a metal area or a ceramic area. If it is a metal area,...

Embodiment 3

[0050] The present embodiment provides an in-situ cermet multi-material preparation method based on powder bed fusion, comprising the following steps:

[0051] (1) Use 3D modeling software to model and design the cermet multi-material parts to be formed, export them to stl format, and input them into the powder bed fusion system.

[0052] Among them, the three-dimensional model of the part is figure 1 As shown, the metal area 1 and the ceramic area 2 belong to the same part as a whole.

[0053] (2) The powder used in multi-material printing is metal alloy powder, then the substrate is sandblasted, and then a layer of metal alloy powder is pre-laid on the substrate. The metal alloy powder is an aluminum alloy powder with an average particle size of 30 μm and a sphericity of 99.9%. The thickness of the layer of metal alloy powder is 30 μm.

[0054] (3) Along the printing direction, determine whether the area to be printed is a metal area or a ceramic area. If it is a metal ar...

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Abstract

The invention discloses an in-situ metal ceramic multi-material preparation method based on powder bed melting, which is characterized by comprising the following steps of: (1) dividing a three-dimensional structure of a part into a metal area and a ceramic area; (2) judging whether the to-be-printed part is a metal area or a ceramic area in the printing direction, if the to-be-printed part is the metal area, printing the metal area of the part according to the three-dimensional structure by adopting a relatively low laser energy density and adopting an additive manufacturing technology under a protective atmosphere; if the part is in the ceramic area, adopting relatively high laser energy density, and printing the ceramic area of the part according to the three-dimensional structure by adopting an additive manufacturing technology in a gas atmosphere containing oxygen or nitrogen; (3) the step (2) is repeated until printing of the part is completed; and the metal area and the ceramic area are printed by adopting metal alloy powder with the same components as raw materials. By changing the gas atmosphere in the forming chamber, the metal ceramic multi-material part is formed in situ under the condition that the same metal powder is used.

Description

technical field [0001] The invention belongs to the technical field of multi-material additive manufacturing, and more particularly relates to an in-situ cermet multi-material preparation method based on powder bed fusion. Background technique [0002] Ceramic materials have excellent properties such as high temperature resistance, high strength, high hardness, wear resistance and corrosion resistance, and are suitable for aerospace, power electronics, energy transportation and other fields. However, the material itself is brittle, and it is difficult to process large-sized and complex-shaped parts. Metal materials have good electrical conductivity, ductility, and thermal conductivity, and have a complementary relationship with ceramics in performance. The metallurgical combination of metal and ceramic materials can make full use of the excellent properties of the two materials to achieve conductivity-dielectric, high ductility-high strength and hardness in the same compone...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F10/28B22F10/32B22F10/36B33Y10/00
CPCB22F10/28B22F10/36B22F10/32B33Y10/00
Inventor 文世峰王晓强周燕刘洋陈志桥耿鹏史玉升
Owner HUAZHONG UNIV OF SCI & TECH
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