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Mixing treatment method for metal powder

A technology of metal powder and processing method, applied in the field of 3D printing, can solve the problem of uneven particle size of metal powder

Inactive Publication Date: 2020-09-22
GUANGZHOU NALIAN MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to provide a metal powder mixing treatment method; the metal powder mixing treatment method can improve the problem of uneven particle size of metal powder after different furnaces are screened

Method used

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  • Mixing treatment method for metal powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] Cobalt-chromium alloy mixing process

[0091] To produce a certain batch of cobalt-chromium alloy powder, the total mass after sieving is 200kg, the particle size range is 10um-65um, and the flow aid is Al with a particle size range of 1um-3um 2 o 3 , the amount added is 0.1% of the total mass of the powder, that is, 200g;

[0092] First, pour the cobalt-chromium alloy powder and the flow aid into the mixing tank 200 from the feed port 210, and after standing for 10 minutes, it is measured that the temperature before mixing is 26° C., and the humidity is 65% RH;

[0093] Then, set the working parameters of the mixing device, set the heating temperature to 55°C, set the mixing time to 60 minutes, and set the rotating speed to 8 revolutions per minute, start the mixing device to perform the mixing process, and complete the mixing process;

[0094]Next, measure the temperature of the metal powder after the mixing treatment as 52°C, and the humidity as 50%RH. At this time...

Embodiment 2

[0099] Mixing process of mold steel powder

[0100] Production of a certain batch of mold steel powder, the total mass after screening is 150kg, the particle size range is 10um-65um, and the flow aid is SiO with a particle size range of 0.5um-1um 2 , the amount added is 0.05% of the total mass of the powder, that is, 75g;

[0101] First, pour the mold steel powder and flow aid from the feed port 210 into the mixing tank 200, and after standing for 10 minutes, the temperature before mixing is measured to be 28°C and the humidity is 70%RH;

[0102] Then, set the working parameters of the mixing device, set the heating temperature to 60°C, set the mixing time to 50 minutes, and set the rotating speed to 8 rpm, start the mixing device for mixing processing, and complete the mixing process;

[0103] Next, measure the temperature of the metal powder after the mixing treatment to be 57°C, and the humidity to be 53%RH. At this time, set the working parameters of the mixing device aga...

Embodiment 3

[0108] Mixing process of stainless steel powder

[0109] Production of a certain batch of stainless steel powder, the total mass after sieving is 300kg, the particle size range is 40um-150um, and the flow aid is Al with a particle size range of 1um-3um 2 o 3 , the amount added is 0.05% of the total mass of the powder, that is, 150g;

[0110] First, pour the mold steel powder and flow aid from the feed port 210 into the mixing tank 200, and after standing for 10 minutes, the temperature before mixing is measured to be 25°C and the humidity is 60%RH;

[0111] Then, set the working parameters of the mixing device, set the heating temperature to 50°C, set the mixing time to 100 minutes, and set the rotating speed to 8 rpm, start the mixing device for mixing processing, and complete the mixing process;

[0112] Next, measure the temperature of the metal powder after the mixing treatment to be 48°C, and the humidity to be 53%RH. At this time, set the working parameters of the mixi...

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Abstract

The invention discloses a mixing treatment method for metal powder. The mixing treatment method comprises the following steps: putting different batches of screened metal powder and a preset amount ofa flow aid into a mixing tank; acquiring a first measured temperature value and a first measured humidity value of the metal powder in the mixing tank; mixing the metal powder in a mixing device based on the first measured temperature value and the first measured humidity value to finish mixing; acquiring a second measured temperature value and a second measured humidity value of the metal powderin the mixing tank; and based on the second measured temperature value and the second measured humidity value, drying the metal powder in the mixing tank to finish drying treatment. During mixing, the flow aid is added into the metal powder, and the temperature and humidity of the metal powder in the mixing tank before and after mixing are monitored, regulated and controlled, so that on one hand,the problem of high particle viscosity among the metal powder due to humidity is solved, and on the other hand, the uniformity and flowability of the metal powder in a mixed finished product are improved.

Description

technical field [0001] The invention relates to the technical field of 3D printing, in particular to a metal powder mixing treatment method. Background technique [0002] 3D printing (3D printing) is a kind of rapid prototyping technology, also known as additive manufacturing. It is based on digital model files and uses bondable materials such as powdered metal or plastic to print layer by layer. Techniques for constructing objects. In recent years, with the continuous development of additive manufacturing technology at home and abroad, metal additive manufacturing (metal 3D printing), as an important branch of 3D printing technology, has attracted more and more attention from all walks of life. Among them, Selective Laser Melting (SLM for short) and Electron Beam Melting (EBM for short) are the most widely used metal additive manufacturing technologies. With the continuous deepening of research, people's demand for different kinds of metal materials is also increasing. ...

Claims

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Application Information

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IPC IPC(8): B01F9/04B01F15/00B01F15/06B33Y40/00G01D21/02G01N11/00G01N15/02B01F29/62
CPCG01N15/02G01N11/00G01D21/02B33Y40/00B01F29/62B01F35/2115B01F35/2135B01F2035/99B01F35/93
Inventor 余仲荣陈智铭
Owner GUANGZHOU NALIAN MATERIAL TECH CO LTD