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Metal structural part and preparation method thereof

A technology of metal structural parts and metal powder, which is applied in the field of metal structural parts and its preparation, can solve the problems of inability to achieve longitudinal solidification depth, hinder metal photocuring forming, and large transverse over-curing width, so as to achieve good longitudinal solidification depth and improve Effects of depth of cure, lift adequacy and uniformity

Active Publication Date: 2022-04-29
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the metal powder material has strong light absorption, and its refractive index is quite different from that of the photosensitive resin, which will cause serious light scattering during the photocuring forming process, resulting in the inability to achieve the ideal longitudinal curing depth and hindering the photocuring of the metal. ; Severe light scattering phenomenon will also cause a large width of lateral over-curing, reducing the manufacturing accuracy of parts

Method used

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  • Metal structural part and preparation method thereof
  • Metal structural part and preparation method thereof
  • Metal structural part and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0052] Step 1, select tantalum metal powder, the particle size range of which is 5-50 μm;

[0053] Step 2, select a filter cloth with a mesh number of 500, cut it and put it into the funnel;

[0054] Step 3, add the metal powder and resin material into the glass funnel in sequence, using a small amount and multiple times, and after it is completely put, let it stand for 2 hours, wherein the modified material is resin, and the total amount of resin material is the total mass of the metal powder 1 / 5;

[0055] Step 4, remove the fully infiltrated metal powder from the funnel, press the fully infiltrated powder into a thin sheet on tin foil, with a thickness of about 6mm, put it in a drying oven, and solidify it at 100°C for 4 hours. After fully cooling, carry out Crushing and sieving to obtain modified metal powder wrapped with a resin layer, wherein the thickness of the resin layer is 500 nm, and the particle size range of the metal powder wrapped with the resin layer is 5.5 μm...

Embodiment 2

[0060] Step 1, select molybdenum metal powder, the particle size range of which is 200nm-10μm;

[0061] Step 2, select a filter cloth with a mesh number of 1000, cut it and put it into the funnel;

[0062] Step 3, add the metal powder and resin material into the glass funnel in sequence, using a small amount and multiple times, and after it is completely put, let it stand for 3 hours, wherein the modified material is resin, and the total amount of resin material is the total mass of the metal powder 1 / 3;

[0063] Step 4, remove the fully infiltrated metal powder from the funnel, press the fully infiltrated powder on tin foil to form a thin sheet with a thickness of about 7mm, put it in a drying oven, and solidify at 120°C for 3 hours. After fully cooling, carry out Crushing and sieving to obtain modified metal powder wrapped with a resin layer, wherein the thickness of the resin layer is 1 μm, and the particle size range of the metal powder wrapped with the resin layer is 1.2...

Embodiment 3

[0068] Step 1, selecting titanium metal powder, the particle size range of which is 5-50 μm;

[0069] Step 2, select a filter cloth with a mesh number of 1000, cut it and put it into the funnel;

[0070] Step 3, add the metal powder and resin material into the glass funnel in sequence, using a small amount and multiple times, after completely putting it away, let it stand for 1.5 hours, wherein the modified material is resin, and the total amount of resin material used is the total mass of the metal powder 1 / 10 of;

[0071] Step 4, remove the fully infiltrated metal powder from the funnel, press the fully infiltrated powder into a thin sheet on tin foil, with a thickness of about 6mm, put it in a drying oven, and solidify it at 115°C for 3 hours. After fully cooling, carry out Crushing and sieving to obtain the modified metal powder wrapped with a resin layer, wherein the thickness of the resin layer is 300nm, and the particle size range of the metal powder wrapped with the r...

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Abstract

According to the metal structural part and the preparation method thereof, original metal powder is pretreated, and the surface of the original metal powder is coated with a modified material layer, so that the refractive index and absorbance of the original metal powder are reduced, and meanwhile, the metal powder is prevented from being oxidized in the machining process. And then curing is completed under irradiation of 405nm ultraviolet light by preparing proper metal slurry, the redundant curing width caused by light scattering is reduced through pretreatment of powder, the curing depth of the metal slurry with the same light intensity and within the same curing time is increased, and therefore the resolution ratio and precision of a printed piece are improved. According to the preparation method, the DLP light curing technology mainly adopts a surface forming mode, so that compared with an SLM forming metal porous part, the internal resolution and precision are greatly improved, and meanwhile, the printing time is also improved to a certain extent.

Description

technical field [0001] The invention belongs to the field of metal additive manufacturing, and in particular relates to a metal structural part and a preparation method thereof. Background technique [0002] Metals are widely used in aerospace, national defense, energy, environment, biomedical and other fields due to their excellent performance. Traditional metal manufacturing methods such as forging, casting and CNC machining are time-consuming and difficult to manufacture complex structures, which limits the development and improvement of related industries and industries. [0003] Additive manufacturing technology, that is, 3D printing technology, can realize the manufacture of complex shapes and macro-micro structures, which can save raw materials and processing cycles. At present, the widely used metal additive manufacturing method is selective laser melting (Selective Laser Melting, SLM), which can complete the preparation of various commonly used metal structural par...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/04B22F1/107B22F1/14B22F10/28B33Y10/00B33Y70/00
CPCB22F9/04B22F10/28B33Y70/00B33Y10/00B22F2009/043Y02P10/25
Inventor 赵广宾刘亚雄田航宗学文张丽丽
Owner XI AN JIAOTONG UNIV
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