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Metal powder antioxidant and surface modification method

An antioxidant and metal powder technology, applied in metal processing equipment, improvement of process efficiency, transportation and packaging, etc., can solve problems such as large quality risks, and achieve the effects of improving overall quality, easy removal, and simple operation

Active Publication Date: 2022-05-27
中航迈特增材科技(北京)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The oxygen content of 316L stainless steel powder after atomization and before sieving is about 500ppm, but after sieving, the oxygen content increases to 600-650ppm, and after mixing and packaging, the oxygen content increases to more than 650-700ppm, resulting in a large quality in the production process risk

Method used

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  • Metal powder antioxidant and surface modification method
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  • Metal powder antioxidant and surface modification method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Preparation of Antioxidants:

[0027] Use a 270-mesh mesh sieve to screen out the paraffin, fluidity aids and phenylpropriazole with a particle size range of 0-53 microns (that is, the particle size range is less than or equal to 53 microns), and sieve the 0-53 microns of paraffin and fluidity aids. Zinc stearate and benzotriazole are mixed according to a mass ratio of 1:1.5:1.5, and the corresponding antioxidant is obtained after mixing uniformly.

[0028] Take 316L stainless steel powder for surface modification treatment:

[0029] (1) After transferring the 316L stainless steel powder before sieving after atomization from the powder collecting tank, mix the antioxidant and 316L stainless steel powder into the air mixer, and the mass proportion of the antioxidant is 0.5%;

[0030] (2) At 0-60 °C, mix the materials in an air mixer for 1-3 hours, so that the 316L stainless steel powder and the antioxidant powder are fully mixed and evenly distributed to obtain a mixed ...

Embodiment 2

[0033] Preparation of Antioxidants:

[0034] Use a 270-mesh mesh screen to sieve the paraffin, flowability aid and phenylpropriazole with a particle size range of 0-53 microns (that is, the particle size range is less than or equal to 53 microns). Zinc stearate and benzotriazole are mixed according to a mass ratio of 1:0.5:0.5, and the corresponding antioxidant is obtained after mixing uniformly.

[0035] Take 316L stainless steel powder for surface modification treatment:

[0036] (1) After transferring the 316L stainless steel powder before sieving after atomization from the powder collecting tank, mix the antioxidant and 316L stainless steel powder into the air mixer, and the mass proportion of the antioxidant is 0.5%;

[0037] (2) At 0-60 °C, mix the materials in an air mixer for 1-3 hours, so that the 316L stainless steel powder and the antioxidant powder are fully mixed and evenly distributed to obtain a mixed powder;

[0038] (3) Transfer the mixed powder to a vacuum ...

Embodiment 3

[0040] Preparation of Antioxidants:

[0041] Use a 270-mesh mesh screen to sieve the paraffin, flowability aid and phenylpropriazole with a particle size range of 0-53 microns (that is, the particle size range is less than or equal to 53 microns). Zinc stearate and benzotriazole are mixed according to the mass ratio of 1:3:3, and the corresponding antioxidant is obtained after mixing uniformly.

[0042] Take 316L stainless steel powder for surface modification treatment:

[0043] (1) After transferring the 316L stainless steel powder before sieving after atomization from the powder collecting tank, mix the antioxidant and 316L stainless steel powder into the air mixer, and the mass proportion of the antioxidant is 0.5%;

[0044](2) At 0-60 °C, mix the materials in an air mixer for 1-3 hours, so that the 316L stainless steel powder and the antioxidant powder are fully mixed and evenly distributed to obtain a mixed powder;

[0045] (3) Transfer the mixed powder to a vacuum mec...

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Abstract

The invention relates to a metal powder antioxidant and a surface modification method. The antioxidant comprises paraffin, a fluidity auxiliary agent and benzotriazole. The method for applying the antioxidant to surface modification of the metal powder comprises the following steps: (1) transferring atomized and unscreened metal powder from a powder collecting tank, mixing the antioxidant and the metal powder, and adding the mixture into an airflow mixer; (2) the metal powder and the antioxidant are mixed in the airflow mixer, so that the metal powder and the antioxidant are fully and uniformly mixed, and mixed powder is obtained; and (3) the mixed powder is transferred into a vacuum mechanical mixer, and surface modification of the metal powder is completed after mixing. According to the antioxidant for the metal powder and the surface modification method of the metal powder, the oxidation resistance of the metal powder is higher, and in the flowing process, the friction force is smaller, and the fluidity is better.

Description

technical field [0001] The invention relates to an antioxidant and a surface modification method for metal powder, and belongs to the technical field of metal powder preparation. Background technique [0002] Gas atomized metal powder is a crucial industrial material among powder materials, and it is widely used in various fields such as traditional powder metallurgy, injection molding, laser cladding, and additive manufacturing. At present, the process of producing spherical metal powder by gas atomization is generally as follows: the bulk metal is melted into a liquid state by electromagnetic induction heating, crushed by high-pressure air flow, and condensed into powder in a collection tank. The powder is classified by vibrating sieve and air sieve, and then mixed and batched to obtain the final product. Oxygen content and fluidity are two of the most important performance indicators of metal powders, which have an important impact on the application of subsequent powder...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/102C23F11/14
CPCC23F11/149Y02P10/25
Inventor 郑吉祥高正江马腾张飞陈欣杨环殷雷王伟
Owner 中航迈特增材科技(北京)有限公司