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Mixed powder for additive manufacturing and preparation method thereof

A technology of additive manufacturing and powder mixing, which is applied in the field of additive manufacturing and can solve the problems of uneven composition and inapplicability of forming and forming samples

Active Publication Date: 2022-02-15
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art, and provide a mixed powder for additive manufacturing and its preparation method, to solve the problem of low powder mixing efficiency in the prior art, and the powder after mixing is caused by the composition of the formed sample. Inhomogeneity or technical problems that cause forming defects and are not suitable for use in the field of additive manufacturing technology

Method used

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  • Mixed powder for additive manufacturing and preparation method thereof
  • Mixed powder for additive manufacturing and preparation method thereof
  • Mixed powder for additive manufacturing and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] 1. Installation: first pour a certain amount of WC into the powder mixing container 3, then pour about 1Kg of CoCrFeNi high-entropy alloy powder into the powder mixing container 3, cover the WC powder to prevent the WC from being blown away, and put the mixing The powder container 3 is placed above the vibrating table body 2. It is required to align the screw holes of the bottom plate 10 with the nut holes above the vibrating table body 2, cover the Al alloy cover plate 9, and pass 8 bolts through the 2 Al alloy covers. The screw holes of the plate 9 are screwed into the nuts of the vibrating table body 2, and the screws are tightened to completely fix the upper cover plate 9, the powder mixing container 3 and the vibrating table body 2 together.

[0056] 2. Air washing: Open all the two quick plugs 8. Turn on the switch at the argon decompression valve of the argon source 6, adjust the flow rate of the argon gas until the flow rate is 10-30cm 3 / min, connect the argon...

Embodiment 2

[0063]1. Installation: first pour a certain quality of TiC into the powder mixing container 3, then pour about 1Kg of CoCrFeNi high-entropy alloy powder into the powder mixing container 3, cover the TiC powder to prevent the TiC from being blown away, and put the The powder container 3 is placed above the vibrating table body 2. It is required to align the screw holes of the bottom plate 10 with the nut holes above the vibrating table body 2, cover the Al alloy cover plate 9, and pass 8 bolts through the 2 Al alloy covers. The screw holes of the plate 9 are screwed into the nuts of the vibrating table body 2, and the screws are tightened to completely fix the upper cover plate 9, the powder mixing container 3 and the vibrating table body 2 together.

[0064] 2. Air washing: Open all the two quick plugs 8. Turn on the switch at the argon decompression valve of the argon source 6, adjust the flow rate of the argon gas, and when the flow rate is 10-30 cm3 / min, connect the argon g...

Embodiment 3

[0071] 1. Installation: First put a certain quality of Y 2 o 3 Pour into the powder mixing container 3, then pour about 1Kg of CoCrFeNi high-entropy alloy powder into the powder mixing container 3, and cover Y 2 o 3 powder, to prevent Y2O3 from being blown away, place the powder mixing container 3 on the top of the vibrating table body 2, align the screw holes of the bottom plate 10 with the nut holes on the top of the vibrating table body 2, cover the Al alloy cover plate 9, and put 8 bolts pass through the screw holes of the two Al alloy cover plates 9, screw them into the nuts of the vibrating table body 2, tighten the screws, and completely fix the upper cover plate 9, the powder mixing container 3 and the vibrating table body 2 together .

[0072] 2. Air washing: Open all the two quick plugs 8. Turn on the switch at the argon decompression valve of the argon source 6, adjust the flow rate of the argon gas, and when the flow rate is 10-30 cm3 / min, connect the argon gas...

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Abstract

The invention discloses mixed powder for additive manufacturing and a preparation method thereof. According to the method, efficient and uniform mixing of the powder is achieved through vibration, and meanwhile the fluidity of the powder is guaranteed for the additive manufacturing technology to use. The method is suitable for flexible and simple requirements on powder component regulation and control in scientific research, and is also suitable for high-efficiency and large-scale requirements in industrial production. The original sphericity and fluidity of the powder are not changed while the component regulation of the powder is realized. For a powder bed additive manufacturing technology, the powder spreading quality of powder, namely uniform spreading and high stacking density of a powder layer, can not be damaged; and for the synchronous powder feeding additive manufacturing technology, the stability of powder feeding can be maintained, the risk of powder blockage of the powder nozzle is reduced, and therefore it is guaranteed that the mixed powder meets the requirement for additive manufacturing formability.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing, and in particular relates to a mixed powder for additive manufacturing and a preparation method thereof. Background technique [0002] Additive manufacturing is a newly developed advanced numerical manufacturing technology, which has been widely used in aerospace, biomedical, automotive and other fields. Powder is the most commonly used raw material method in additive manufacturing technology. For example, the powder of selective laser melting additive manufacturing technology is 15-53 microns, and the powder of electron beam selective laser melting additive manufacturing technology is 45-105 microns. Laser direct The powder of energy deposition technology (or laser stereoforming technology) is 75-200um. When the alloy composition is adjusted to a certain extent or another compound is added to the alloy, one way is to smelt the alloy and then re-powder it. This method has a long p...

Claims

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Application Information

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IPC IPC(8): C22C30/00B22F1/065B22F1/14B22F10/28B33Y70/10
CPCC22C30/00B22F10/28B33Y70/10Y02P10/25
Inventor 王理林王志军林鑫黄卫东
Owner NORTHWESTERN POLYTECHNICAL UNIV
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