A multi-material additive manufacturing molding system and method

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

Active Publication Date: 2022-07-12
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A multi-material additive manufacturing molding system and method
  • A multi-material additive manufacturing molding system and method
  • A multi-material additive manufacturing molding system and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] In the example of the present invention, the parts printed with FeCrAl alloy powder have excellent properties such as uniform structure, high strength, good corrosion resistance, etc. The nickel metal is coated with Al 2 O 3 The ceramics were also shaped with smooth fabrication, with good interfacial contact between the cermet particles.

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

[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 , the median particle size is 20 μm;

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

[0074] In step 1, the mesh number of the sieve is 400 meshes when sieving.

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

...

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 the various raw material powders after vacuum drying and sieving into the plurality of powder storage tanks;

[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 treated ceramic powder; the treated ceramic powder is put into the powder storage tank.

[0091] The thin film method is used for surface treatment and metallization of the ceramic powder after vacuum drying and sieving; wherein, the melting point of the coating metal is lower than that of the cera...

Embodiment 3

[0093] The only 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 ceramic powder after vacuum drying and sieving, and the thickness of the coating layer is 10 μm.

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Abstract

The invention discloses a multi-material additive manufacturing molding system and method. The system comprises: a laser system; a cavity, wherein a powder suction system, a powder feeding system, a powder spreading system, a working cylinder and a plurality of a powder storage tank; wherein, the powder suction system is used for absorbing excess raw material powder; the powder spreading system is movably arranged in the cavity, and is used for feeding part of the raw material powder in the powder storage tank into the working cylinder; The powder feeding system is movably installed in the powder spreading system, and is used for feeding the raw material powder provided by the other powder storage tanks into the working cylinder; the base plate and the heating system, the base plate and the heating system are arranged in the working cylinder ; Ventilation system for evacuating the cavity and filling it with protective gas. The present invention can realize metal / ceramic multi-material integrated forming by means of additive manufacturing, and can solve the problem of compatibility of printing processes caused by large differences in the properties of different powders.

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 a laser as an energy source. It has the advantages of not being limited by the structure of the parts, and has a wide range of applications. It can be used for the processing and manufacturing of complex, difficult-to-machine 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 laying 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 alloys, cer...

Claims

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Application Information

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Patent Type & Authority Patents(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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