Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparing method of low-reflectivity spherical copper powder for 3D printing

A low-reflectivity, 3D printing technology, applied in the field of 3D printing, can solve the problems of high reflectivity and unfavorable laser energy absorption, and achieve the effect of reducing reflectivity and improving laser energy rate

Inactive Publication Date: 2017-05-10
DONGGUAN HYPER TECH COMPANY
View PDF5 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The smooth copper powder surface has a high reflectivity to the laser, which is not conducive to the absorption of laser energy

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparing method of low-reflectivity spherical copper powder for 3D printing
  • Preparing method of low-reflectivity spherical copper powder for 3D printing
  • Preparing method of low-reflectivity spherical copper powder for 3D printing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] This embodiment provides a method for preparing spherical copper powder with low reflectivity for 3D printing, which at least includes the following steps:

[0028] S1, using electrolytic copper as the raw material, the atomized copper powder is produced by the gas atomization method, the atomized medium gas is air, and the obtained atomized copper powder is spherical or quasi-spherical, and the particle size ranges from 5 μm to 150 μm;

[0029] S2, sieving the atomized copper powder obtained in S1, and dividing it into copper powders of different specifications;

[0030] S3, put the copper powder (specification) within the range of 300-500 mesh in the crucible for oxidative roasting, so that the surface of the copper powder reacts with oxygen to form a rough surface, wherein the roasting medium is air, and the roasting temperature is 300℃, the duration of calcination is 3h, and the copper powder after calcination is brown-black;

[0031] S4, the surface oxidized coppe...

Embodiment 2

[0036] This embodiment provides a method for preparing spherical copper powder with low reflectivity for 3D printing, which at least includes the following steps:

[0037]S1, using phosphorus copper alloy (phosphorus content is 0.4wt.%) as the raw material, the atomized copper powder is produced by the gas atomization method, the atomization medium gas is air, and the atomized copper powder obtained is spherical or almost spherical, and the particle size is The range is 5μm-150μm;

[0038] S2, sieving the atomized copper powder obtained in S1, and dividing it into copper powders of different specifications;

[0039] S3, put the copper powder (specification) within the range of 300-500 mesh in the crucible for oxidative roasting, so that the surface of the copper powder reacts with oxygen to form a rough surface, wherein the roasting medium is air, and the roasting temperature is 250℃, the duration of calcination is 5h, and the copper powder after calcination is brown-black; ...

Embodiment 3

[0044] This embodiment provides a method for preparing spherical copper powder with low reflectivity for 3D printing, which at least includes the following steps:

[0045] S1, using bronze (CuSn10) as the raw material, the atomized copper powder is produced by the gas atomization method, the atomized medium gas is air, and the obtained atomized copper powder is spherical or quasi-spherical, and the particle size range is 5 μm-150 μm;

[0046] S2, sieving the atomized copper powder obtained in S1, and dividing it into copper powders of different specifications;

[0047] S3, placing copper powder (specification) within the range of 80-200 mesh in the crucible for oxidative roasting, so that the copper powder surface oxidizes with oxygen to form a rough surface, wherein the roasting medium is air, and the roasting temperature is 200℃, the duration of calcination is 5.5h, and the copper powder after calcination is brownish red;

[0048] S4, the surface oxidized copper powder obta...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of 3D printing, and particularly relates to a preparing method of low-reflectivity spherical copper powder for 3D printing. The preparing method includes the following steps that copper or copper alloy is used as a raw material, and atomized copper powder is prepared through a gas atomization method; the atomized copper powder is screened; low-temperature oxidizing roasting is carried out on the copper powder which is obtained after screening and is of different specifications, so that surface oxidation of the copper powder is achieved; the copper powder obtained after oxidation is put in the hydrogen protective atmosphere to be roasted in a reduced mode, and the copper powder after surface oxidation is reduced again. Compared with the prior art, the atomized copper powder is prepared through the gas atomization method, then the atomized copper powder is reduced, finally the oxygen content of the copper powder is reduced to meet the requirement of 3D printing, and the copper powder microcosmically represents high surface roughness in the oxidation state. By means of the process design, the laser reflectivity is effectively reduced, and the energy rate of laser absorbed by the copper powder is increased.

Description

technical field [0001] The invention belongs to the technical field of 3D printing, and in particular relates to a method for preparing spherical copper powder with low reflectivity for 3D printing. Background technique [0002] Copper alloys have excellent electrical and thermal conductivity as well as high mechanical strength, which is why copper alloys are ideal materials for electrical contact elements, heat sinks, crystallizers, engine combustion chambers, and other lining parts. However, this property poses difficulties for 3D printing (additive manufacturing) of copper alloys. Since the reflectivity of copper alloy to laser light is too high, most of the light beam is reflected, so the effective absorption rate of laser energy is low. On the one hand, the reflected laser is projected onto the adjacent powder particles, and the laser energy is transmitted to the adjacent area of ​​the set sintering area to cause overflow, melting and welding, which deteriorates the su...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/08B22F1/00
CPCB22F9/082B22F1/145
Inventor 李晖云
Owner DONGGUAN HYPER TECH COMPANY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com