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Preparation method and application of epoxy resin coated stainless steel powder

An epoxy resin and stainless steel technology, applied in the field of 3D printing materials, can solve the problems of high equipment requirements and complicated preparation process of coating powder

Pending Publication Date: 2021-05-14
北京科技大学广州新材料研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional coating powder preparation process is complex, such as spray drying, which requires high equipment

Method used

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  • Preparation method and application of epoxy resin coated stainless steel powder
  • Preparation method and application of epoxy resin coated stainless steel powder
  • Preparation method and application of epoxy resin coated stainless steel powder

Examples

Experimental program
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preparation example Construction

[0029] One embodiment of the present invention provides a method for preparing epoxy resin-coated stainless steel powder, comprising the following steps:

[0030] Dissolve the epoxy resin in the solvent, add stainless steel powder, stir until the solvent evaporates, then dry, grind and sieve in sequence;

[0031] The mass ratio of epoxy resin to stainless steel powder is 1:(20-50), and the epoxy resin is solid bisphenol A epoxy resin.

[0032] Wherein, the volatilization of the stirring solvent can be understood as that the upper layer solution cannot be layered out.

[0033] It can be understood that in the preparation method of epoxy resin-coated stainless steel powder, adding a slight excess of solvent is conducive to the uniform mixing of epoxy resin and stainless steel powder; adding too much solvent will lead to too long stirring time and increase the cost.

[0034] Dissolve the solid bisphenol A type epoxy resin in the solvent, and coat the surface of stainless steel t...

Embodiment 1

[0061] (1) Get 4g epoxy resin E12 and fully dissolve in 80mL acetone solution, add 96g D50=14 μ m, powder particle shape is the 316L stainless steel powder of nearly spherical shape in the acetone solution that is dissolved with resin;

[0062] (2) Put the beaker containing stainless steel, epoxy resin, and acetone mixture in a fume hood, and use a mechanical stirring device (model: IKA EUROSTAR 60digital) to stir the mixture at a stirring speed of 800r / min. A large amount of volatilization, when the mechanical stirring cannot fully stir the remaining materials, use a glass rod to further stir them until the mixed materials cannot be separated into the upper layer solution, and then take the beaker out of the fume hood;

[0063] (3) Put the mixed material in a blower dryer, bake at 50°C for 1.5 hours, take it out, grind it, and sieve it with a 300-mesh sieve to obtain epoxy resin-coated stainless steel powder with good coating effect, such as figure 1 .

Embodiment 2

[0065] (1) Get 4g of epoxy resin E14 and fully dissolve in 80mL of acetone solution, add 96g of D50=14 μm, 316L stainless steel powder that is nearly spherical in shape into the acetone solution in which the resin is dissolved;

[0066] (2) Put the beaker containing stainless steel, epoxy resin, and acetone mixture in a fume hood, and use a mechanical stirring device (model: IKA EUROSTAR 60digital) to stir the mixture at a stirring speed of 800r / min. A large amount of volatilization, when the mechanical stirring cannot fully stir the remaining materials, use a glass rod to further stir them until the mixed materials cannot be separated into the upper layer solution, and then take the beaker out of the fume hood;

[0067] (3) Put the mixed material in a blower dryer, bake at 50°C for 1.5 hours, take it out, grind it, and sieve it with a 300-mesh sieve to obtain epoxy resin-coated stainless steel powder with good coating effect, such as figure 2 .

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Abstract

The invention relates to a preparation method of epoxy resin coated stainless steel powder. The preparation method comprises the following steps of dissolving epoxy resin in a solvent, adding stainless steel powder, stirring until the solvent is volatilized, and sequentially conducting drying, grinding and screening, wherein the mass ratio of the epoxy resin to the stainless steel powder is 1: (20-50), and the epoxy resin is solid bisphenol A epoxy resin. According to the preparation method, the epoxy resin is dissolved in the solvent, the resin is separated out and coated on the surface of the stainless steel through solvent volatilization, in the process, the fluidity and dispersity of the stainless steel powder are good, the coating effect is improved, the prepared coated powder is good in sphericity degree and less in powder agglomeration, and the phenomena of agglomeration, uneven coating and the like of the coated powder are effectively reduced. No antioxidant or dispersing agent is added, introduction of impurities is reduced, the preparation process is simple, subsequent further impurity removal is not needed, and the requirement for equipment is low.

Description

technical field [0001] The invention relates to the technical field of 3D printing materials, in particular to a preparation method and application of epoxy resin-coated stainless steel powder. Background technique [0002] Selective Laser Sintering (SLS) technology is a 3D printing forming method based on the idea of ​​discrete accumulation forming. In the computer, use 3D solid modeling software to build a 3D model of the workpiece, and slice it along the Z direction of the model with layered slicing software to obtain the profile information of the sections at different heights. Under the control of the computer, the laser beam selectively scans and sinters the powder layer according to the profile information of each layer’s section. Scanning and sintering, finally get the designed three-dimensional solid parts. This method is not limited by the complexity of the shape of the formed part, does not require any tooling and molds, shortens the product development cycle, c...

Claims

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Application Information

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IPC IPC(8): B22F1/02B22F3/105B22F10/28B33Y70/10
CPCB33Y70/10B22F2301/35B22F1/102B22F1/16
Inventor 何新波郑群芳何十三
Owner 北京科技大学广州新材料研究院
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