Multi-material additive manufacturing forming system and method

An additive manufacturing and multi-material technology, applied in the field of additive manufacturing, can solve problems such as printing process compatibility and large differences in powder properties, and achieve the effects of rapid manufacturing, high molding precision, and uniform temperature distribution

Active Publication Date: 2021-04-27
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention can use the method of additive manufacturing to realize the integrated forming of metal / ceramic multi-materials, and can solve the printing process compatibility problem caused by the large difference in properties of different powders

Method used

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  • Multi-material additive manufacturing forming system and method
  • Multi-material additive manufacturing forming system and method
  • Multi-material additive manufacturing forming system and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] In the example of the present invention, the parts printed by FeCrAl alloy powder have excellent properties such as uniform structure, high strength and good corrosion resistance, and nickel metal coating Al 2 o 3 Ceramics were also formed with smooth fabrication, with good interfacial contact between cermet particles.

[0071] A multi-material additive manufacturing method according to an embodiment of the present invention, comprising:

[0072] In step 1, the metal powder is FeCrAl alloy powder, the median particle size is 30 μm, and the ceramic powder is Al 2 o 3 , with a median particle size of 20 μm;

[0073] In step 1, when vacuum drying, the drying temperature is set to 100°C, and the vacuum drying is 6 hours;

[0074] In step 1, it is 400 meshes to select the screen mesh number when sieving.

[0075] In step 2, the method of coating metal is selected as electroless plating, the coating metal is nickel metal, and the coating thickness is 5 μm;

[0076] In s...

Embodiment 2

[0086] A multi-material additive manufacturing method according to an embodiment of the present invention, based on the multi-material additive manufacturing molding system of the present invention, includes the following steps:

[0087] Putting various raw material powders after vacuum drying and sieving into the plurality of powder storage tanks respectively;

[0088] Set the forming parameters and import the model;

[0089] Introduce protective gas, preheat, and print according to the preset molding process.

[0090] Wherein, when the raw material powder is ceramic powder, the ceramic powder after vacuum drying and sieving is subjected to surface treatment and metallization to obtain the processed ceramic powder; the processed ceramic powder is put into a powder storage tank.

[0091] The thin-film method is used for surface treatment and metallization of the vacuum-dried and sieved ceramic powder; wherein, the melting point of the coating metal is lower than that of the c...

Embodiment 3

[0093] The difference between the embodiment of the present invention and the embodiment 2 is that the thick film method is used for the surface treatment and metallization of the vacuum-dried and sieved ceramic powder, and the thickness of the coating is 10 μm.

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Abstract

The invention discloses a multi-material additive manufacturing forming system and method. The system comprises a laser system and a cavity as well as a base plate, a heating system and a gas exchange system, wherein a powder absorbing system, a power feeding system, a powder spreading system, a working cylinder and a plurality of powder storage cylinders are arranged in the cavity; the powder absorbing system is used for absorbing excessive raw material powder; the powder spreading system can be movably arranged in the cavity for feeding raw material powder in some of the powder storage cylinders into the working cylinder; the powder feeding system can be movably mounted on the powder spreading system for feeding raw material powder provided by the rest of the powder storage cylinders into the working cylinder; the base plate and the heating system are arranged in the working cylinder; and the gas exchange system is used for performing vacuum-pumping on the cavity and injecting protective gas. The additive manufacturing method can be utilized to realize metal / ceramic multi-material integrated forming, so that the printing process compatibility problem caused by great difference of different powder properties can be solved.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing, and in particular relates to a multi-material additive manufacturing molding system and method. Background technique [0002] Laser additive manufacturing technology is an additive manufacturing technology that uses laser as an energy source. It has the advantages of not being limited by the structure of the part and has a wide range of applications. It can be used for the processing and manufacturing of complex, difficult-to-process and thin-walled parts. According to its forming principle, laser additive manufacturing technology can be divided into laser selective melting technology characterized by powder bed powder spreading and laser metal direct forming technology characterized by synchronous powder feeding. [0003] At present, laser additive manufacturing technology can form titanium alloys, superalloys, iron-based alloys, aluminum alloys, refractory alloys, amorphous alloy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F12/55B22F10/28B22F12/60B22F12/67B28B1/00B33Y30/00B33Y10/00B33Y70/10
CPCB28B1/001B33Y30/00B33Y10/00B33Y70/10Y02P10/25
Inventor 鲁中良周航王成玉苗恺李涤尘
Owner XI AN JIAOTONG UNIV
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