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

Method and equipment for preparing spherical metal powder through arc-assisted plasma atomization

A metal powder and plasma technology, used in powder metallurgy and advanced manufacturing, ion atomization to prepare spherical metal powder, can solve the problems of insufficient wire melting, low production efficiency of fine powder, high power consumption, and achieve simple and compact equipment structure. , good surface appearance, the effect of improving efficiency

Active Publication Date: 2021-08-24
BEIJING UNIV OF TECH
View PDF10 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method solves the problems of insufficient silk melting, high power consumption and low fine powder production efficiency in the production process of the traditional powder making method

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
  • Method and equipment for preparing spherical metal powder through arc-assisted plasma atomization
  • Method and equipment for preparing spherical metal powder through arc-assisted plasma atomization
  • Method and equipment for preparing spherical metal powder through arc-assisted plasma atomization

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0040] (1) Material selection:

[0041] The iron-based wire material with a diameter of 1.6mm is selected, and the wire material composition is: C (0.05%), Cr (11.9%), Ni (5.6%), Mn (1%), Mo (0.2%), Si (0.5%) ), Fe (80.75%). Plasma gas adopts Ar+H 2 mixed gas.

[0042] (2) Operation process:

[0043] ① Install the wire to be atomized on the wire feeder and check the tightness, set the wire feeding speed to 100mm / s; ② Turn on the water cooling system, including the water cooling of the plasma generator and the water cooling of the vacuum atomization chamber;

[0044] ③Evacuate the vacuum atomization chamber, and after the air pressure is evacuated to -0.1MPa by a vacuum pump, open the valve of the gas cylinder to introduce high-purity argon gas (99.99%) to make the air pressure reach 0.1MPa, and wait until the inert gas and the remaining gas in the chamber are completely mixed After that, evacuate to -0.1MPa again, and repeat the above content 3 times;

[0045] ④ Adjust th...

example 2

[0052] (1) Material selection:

[0053] The iron-based wire material with a diameter of 1.6mm is selected, and the wire material composition is: C (0.05%), Cr (11.9%), Ni (5.6%), Mn (1%), Mo (0.2%), Si (0.5%) ), Fe (80.75%). Plasma gas adopts Ar+H 2 mixed gas.

[0054] (2) Operation process:

[0055] ① Install the wire to be atomized on the wire feeder and check the tightness, set the wire feeding speed to 100mm / s; ② Turn on the water cooling system, including the water cooling of the plasma generator and the water cooling of the vacuum atomization chamber;

[0056] ③Evacuate the vacuum atomization chamber, and after the air pressure is evacuated to -0.1MPa by a vacuum pump, open the valve of the gas cylinder to introduce high-purity argon gas (99.99%) to make the air pressure reach 0.1MPa, and wait until the inert gas and the remaining gas in the chamber are completely mixed After that, evacuate to -0.1MPa again, and repeat the above content 3 times;

[0057] ④ Adjust th...

example 3

[0064] (1) Material selection:

[0065] Select iron-based wire with a diameter of 1.2mm, and the wire composition is: C (0.01%), Cr (16.7%), Ni (13.3%), Mn (1%), Mo (0.2%), Si (0.5%) ), Fe (68.29%). Plasma gas adopts Ar+H 2 mixed gas.

[0066] (2) Operation process:

[0067] ① Install the wire to be atomized on the wire feeder and check the tightness, set the wire feeding speed to 70mm / s; ② Turn on the water cooling system, including the water cooling of the plasma generator and the water cooling of the vacuum atomization chamber;

[0068] ③Evacuate the vacuum atomization chamber, and after vacuuming the vacuum pump to -0.1MPa, open the valve of the gas cylinder to introduce high-purity argon (99.99%) to make the pressure reach 0.1MPa, and wait until the inert gas and the remaining gas in the chamber are completely mixed After that, evacuate to -0.1MPa again, and repeat the above content 3 times;

[0069] ④ Adjust the current of the DC constant current plasma generator po...

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
diameteraaaaaaaaaa
fluidityaaaaaaaaaa
fluidityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method and equipment for preparing spherical metal powder by using a plasma atomization technology. According to the method, plasma jet is used as a heat source to heat and melt a wire, the wire is fed in an inclined and bidirectional mode; and meanwhile, a direct-current constant-voltage power supply is applied to the wire, so that electric arcs are generated in an anode duct, and the wire is heated in an auxiliary mode. The invention further discloses equipment for preparing the spherical metal powder based on the plasma atomization technology. The equipment comprises a direct-current constant-current plasma generator power supply, a direct-current constant-voltage auxiliary power supply, a plasma generator, an inclined wire feeding lengthened anode, a double-wire feeder, a vacuum atomizing chamber, a powder collecting device and a vacuum pump. By using the method and the equipment, the double-wire feeding system, the anode inside inclined wire feeding mode and the power supply assisted heating wire melting method are introduced, so that the powder production efficiency is improved, and the equipment power is reduced.

Description

technical field [0001] The invention relates to the technical field of powder metallurgy and advanced manufacturing, in particular to the technical field of preparing spherical metal powder by plasma atomization. Background technique [0002] Spherical metal powders are widely used in manufacturing industries such as aerospace, metallurgy and medical treatment. With the rapid development of the industry, higher requirements are placed on the performance of metal powders. At present, the demand for powder mainly includes good fluidity, high bulk density and good purity. The increasing demand for high-performance powders poses greater challenges to powder preparation technology. [0003] At present, the preparation methods of spherical metal powder mainly include spheroidization method, centrifugation method and gas atomization method. The centrifugal method is represented by the rotating electrode method. It uses a heat source to heat the metal rod to melt it while the rod...

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): B22F9/14
CPCB22F9/14Y02P10/25
Inventor 李辉曲浩然马英舒林健符寒光
Owner BEIJING UNIV OF TECH
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