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3D printed product and preparation method thereof

A 3D printing and product technology, applied in the direction of additive processing, etc., can solve the problems of sintering stability, unstable wire feeding, and excessive granulation, so as to promote uniform powder distribution, smooth and shiny surface, and prevent oxidation and greening Effect

Active Publication Date: 2021-11-26
JIANGSU UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the presence of stearic acid, the stiffness of the wire material is reduced, the wire feeding is unstable, there is no solvent debonding before sintering, the adhesive is difficult to volatilize and easy to bulge, the nitrogen reduction is insufficient, the body will be oxidized during sintering, the sintering process is unstable, and printing Product stiffness and adhesion are not good enough
[0006] Generally speaking, there are many granulations in the existing technology, which cannot be well adapted to the printers on the market, and a good binder formula is not selected. The stiffness and viscosity of the wire material affect the wire feeding process, resulting in unstable printed products. , the lack of solvent debonding process, the increase of bulging rate during sintering, and the choice of sintering atmosphere will also affect the sintering stability

Method used

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  • 3D printed product and preparation method thereof
  • 3D printed product and preparation method thereof
  • 3D printed product and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method for preparing a 3D printing product, comprising the following steps:

[0029] (1) According to the volume ratio of 3:1, add 316L stainless steel powder with a particle size of 20 μm and a polymer binder into the internal mixer and mix them. The reaction temperature is 180 ° C, the speed is 50 r / min, and the mixture is mixed for 35 minutes. After condensation Obtain mixed material; Macromolecule binder comprises that the volume ratio is 4:1:1 support adhesive polypropylene, plastic regulator SEBS, viscosity modifier paraffin;

[0030] (2) Extrude the mixed material, the extrusion temperature is 165°C, the extrusion speed is 35r / min, and wind up to obtain a 3D printing composite filament with a diameter of 1.72mm. The 3D printing composite filament contains the following mass percentages Elements: C: 0.01%, Si: 0.1, Mn: 0.1%, P: 0.01%, S: 0.03%, Cr: 16%, Cu: 0.2%, Ni: 10%, Mo: 2%, the rest is Fe and impurities;

[0031] (3) The 3D printing composite filament is...

Embodiment 2

[0038] A method for preparing a 3D printing product, comprising the following steps:

[0039](1) According to the volume ratio of 1:2, add 316L stainless steel powder with a particle size of 15 μm and polymer binder to the internal mixer and mix them. The reaction temperature is 170 ° C, the speed is 45 r / min, and the mixture is mixed for 35 minutes. After condensation Obtain mixed material; Macromolecule binder comprises volume ratio is the supporting adhesive polyethylene of 2:1:1, plasticity regulator SBS, viscosity regulator carnauba wax;

[0040] (2) Extrude the mixed material, the extrusion temperature is 175°C, the extrusion speed is 30r / min, and wind up to obtain a 3D printing composite filament with a diameter of 1.76mm. The 3D printing composite filament contains the following mass percentages Elements: C: 0.03%, Si: 1%, Mn: 2%, P: 0.04%, S: 0.01%, Cr: 18%, Cu: 0.7%, Ni: 12%, Mo: 3%, the rest is Fe and impurities;

[0041] (3) The 3D printing composite filament is ...

Embodiment 3

[0046] A method for preparing a 3D printing product, comprising the following steps:

[0047] (1) According to the volume ratio of 2:1, add 316L stainless steel powder and polymer binder with a particle size of 50 μm to the internal mixer and mix them. The reaction temperature is 190 ° C, the speed is 65 r / min, and the mixture is mixed for 35 minutes. After condensation Obtain mixed material; Macromolecule binder comprises that volume ratio is 3:1:1 supporting adhesive polymethyl methacrylate, plastic regulator SEBS, viscosity modifier palm wax;

[0048] (2) Extrude the mixed material, the extrusion temperature is 170°C, the extrusion speed is 40r / min, and wind up to obtain a 3D printing composite filament with a diameter of 1.74mm. The 3D printing composite filament contains the following mass percentages Elements: C: 0.02%, Si: 0.3, Mn: 1%, P: 0.02%, S: 0.02%, Cr: 17%, Cu: 0.1%, Ni: 11%, Mo: 2.5%, and the rest are Fe and impurities;

[0049] (3) The 3D printing composite f...

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Abstract

The invention discloses a 3D printed product and a preparation method thereof. The invention discloses a 3D printed product which is made of a 3D printing composite wire material. The 3D printing composite wire material is prepared from the following elements in percentage by mass: 0.01 to 0.03 percent of C, 0.1 to 1 percent of Si, 0.1 to 2 percent of Mn, 0.01 to 0.04 percent of P, 0.01 to 0.03 percent of S, 16 to 18 percent of Cr, 0.1 to 1.0 percent of Cu, 10 to 12 percent of Ni, 2 to 3 percent of Mo and the balance of Fe and impurities. The invention further discloses a preparation method of the 3D printed product. The 3D printing stability is improved, the composite wire material for 3D printing is high in rigidity and strength and good in sintering stability, and the surface of the 3D printed product is smooth and glossy; the prepared 3D printing composite wire material is suitable for various printers sold in the market, high in adaptability, convenient to use and high in economic value; and SEBS, SBS, paraffin and palm wax have good intermiscibility, and powder distribution uniformity is promoted.

Description

technical field [0001] The invention relates to an additive material and a preparation method thereof, in particular to a 3D printing product and a preparation method thereof. Background technique [0002] 3D printing technology is currently a popular manufacturing molding technology. Compared with traditional molding technology, 3D printing technology has the following advantages: 3D printing is an additive manufacturing technology. Compared with traditional building materials manufacturing, it has high material utilization and short processing time. Printing technology can complete designs that cannot be processed by traditional processing or are difficult to process, such as complex mesh structures, gradient material molding, etc. 3D printing has the advantages of less post-processing steps and can achieve on-demand printing, so it has received widespread attention. [0003] Stainless steel has high hardness, good strength, strong corrosion resistance, and is widely used ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/42C22C38/44B22F1/00B33Y70/10B33Y80/00B22F3/20
CPCC22C38/02C22C38/04C22C38/42C22C38/44B33Y80/00B33Y70/10B22F3/20
Inventor 尹衍军骆书虎阚鑫锋陈超高鹏飞
Owner JIANGSU UNIV OF SCI & TECH
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