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Grain-refined metal powder for 3D (Three Dimensional) printing and preparation method thereof

A 3D printing and metal powder technology, applied in metal processing equipment, transportation and packaging, additive processing, etc., can solve problems such as uneven distribution, poor wettability, and affecting the refining effect of grain refiners

Active Publication Date: 2019-02-15
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, 3D printing generally uses filaments and powders, especially powders, and the addition of grain refiners to matrix powders generally has the problems of poor wettability and uneven distribution, which makes the powder compatibility poor, thus Affects the refining effect of grain refiners

Method used

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  • Grain-refined metal powder for 3D (Three Dimensional) printing and preparation method thereof
  • Grain-refined metal powder for 3D (Three Dimensional) printing and preparation method thereof
  • Grain-refined metal powder for 3D (Three Dimensional) printing and preparation method thereof

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preparation example Construction

[0030] The present invention will be further described in detail in conjunction with specific steps below. The present invention discloses a metal powder for 3D printing with grain refinement and a preparation method thereof; the method specifically includes the following steps:

[0031] (1) Pretreatment refiner powder

[0032] Add the refiner powder to the hydrochloric acid solution with a mass concentration of 3-10%, to ensure that the refiner powder can be completely dispersed in the hydrochloric acid solution to obtain suspension A, and the refiner is TiC, TiB 2 、TiAl 3 At least one of the refining agents can be nanoscale and micronscale, wherein the nanoscale particle size is 20-100nm, and the micron-scale particle size is 1-5μm; the suspension A is stirred on a magnetic stirrer After 2 hours of treatment, put it into a heat-collecting constant temperature stirrer and stir at 60°C for 2 hours to obtain a suspension B; let the suspension B stand until the layers of the su...

Embodiment 1

[0042] (1) Pretreatment refiner powder: 10g of nanoscale TiC powder is dissolved in a hydrochloric acid solution with a mass concentration of 5%, to ensure that the TiC powder is completely dispersed in the hydrochloric acid solution, and after stirring for 2 hours on an electromagnetic stirrer, put Put it into a heat-collecting constant temperature stirrer, stir at 60°C for 2 hours to obtain a suspension B, let the suspension B stand to separate layers, pour off the supernatant, and the remaining bottom material is a viscous intermediate product C; The viscous intermediate product C was washed 3 times with distilled water in a vacuum filter until the pH value of the suspension containing the intermediate product was 7 to obtain a suspension D; the suspension D was placed in a vacuum drying oven at 60°C Dry until the distilled water in the suspension is volatilized to obtain a lumpy pickled refiner, and grind to obtain pickled TiC powder.

[0043] (2) Preparation of metal powder...

Embodiment 2

[0048] (1) Pretreatment refiner powder: dissolve 10 g of micron-sized TiC powder in a hydrochloric acid solution with a mass concentration of 3%, to ensure that the TiC powder is completely dispersed in the hydrochloric acid solution, stir on an electromagnetic stirrer for 2 hours, and put Put it into a heat-collecting constant temperature stirrer, stir at 60°C for 2 hours to obtain a suspension B, let the suspension B stand to separate layers, pour off the supernatant, and the remaining bottom material is a viscous intermediate product C; The viscous intermediate product C was washed 3 times with distilled water in a vacuum filter until the pH of the suspension containing the intermediate product was 6.5 to obtain a suspension D; the suspension D was placed in a vacuum drying oven at 60°C Dry until the distilled water in the suspension is volatilized to obtain a lumpy pickled refiner, and grind to obtain pickled TiC powder.

[0049] (2) Preparation of metal powder containing ...

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Abstract

The invention discloses grain-refined metal powder for 3D (Three Dimensional) printing and a preparation method thereof. The method comprises the following steps: carrying out acid washing treatment on a refining agent through hydrochloric acid to remove impurities and oil stain on the surface of the refining agent, so that the surface activity of the refining agent is improved and the compatibility of the refining agent with matrix powder is improved; then the refining agent is uniformly mixed with the matrix powder and final mixed powder has small crystalline grains; and the mechanical properties of printed parts are improved and the mechanical properties of metal parts are improved from the source.

Description

【Technical field】 [0001] The invention belongs to the field of powder for 3D printing, and in particular relates to a metal powder for 3D printing with fine grains and a preparation method thereof. 【Background technique】 [0002] Compared with conventional casting, metal material additive manufacturing (3D printing) can realize the molding of complex structures, and compared with metal parts formed under conventional casting conditions, metal 3D printing parts will obtain finer equiaxed crystals after solidification. , and the mechanical properties of fine equiaxed crystals are better than those of coarse columnar crystals. Therefore, refining the grain size and controlling the grain size are very important to improve the mechanical properties of metal materials. By adding a grain refiner to the metal matrix, the grains can be refined and the mechanical properties of the material can be improved. However, 3D printing generally uses filaments and powders, especially powders,...

Claims

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Application Information

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IPC IPC(8): B22F1/00B33Y70/00
CPCB33Y70/00B22F1/14B22F1/145
Inventor 王强张康牛文娟
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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