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Preparation method of metal powder for additive manufacturing

A metal powder and additive manufacturing technology, applied in the field of spherical powder material preparation, can solve the problems of unfavorable performance of 3D printed products, easy pollution, processing speed, cost and efficiency limitations, etc., to improve powder shape and processing speed Fast, shape-improving effect

Inactive Publication Date: 2017-10-03
BEIJING COMPO ADVANCED TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Plasma spheroidization needs to establish high-temperature plasma, and the powder flow rate is small (<10KG / h), so there are limitations in cost and efficiency
Adding a dispersant introduces impurities to the powder, which is extremely detrimental to the performance of the finished 3D printing product
In addition, there is also a method of surface spheroidization using the interaction between spherical media and powder, but this method is prone to pollution and the processing speed is slow

Method used

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  • Preparation method of metal powder for additive manufacturing
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Examples

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Effect test

Embodiment 1

[0023] A preparation method of 316L stainless steel powder for three-dimensional printing process (3DP), comprising the following steps:

[0024] Step 1: Obtain metal powder in the required particle size range;

[0025] Step 2: Send the powder of step 1 into the shaping equipment;

[0026] Step 3: directly obtain the processed 316L stainless steel powder in the collector;

[0027] The metal powder obtained in step 1 is 316L stainless steel powder prepared by gas atomization method, and its composition is C≤0.03, Si≤1.0, Mn≤2.00, P≤0.045, S≤0.030, Ni:10.0-14.0, Cr:16.0- 18.0, Mo: 2.0-3.0, particle size 20-45μm. The powder flow rate in step 2 is 500KG / h. The finished powder is obtained directly in the collector after processing. The morphology of the 316L stainless steel powder that the present embodiment obtains is as follows figure 1 As shown, the average particle size is 30.59μm, the fluidity is 14.5S / 50g, and the bulk density is 4.2g / cm 3 . The powder has good fluidit...

Embodiment 2

[0029] A method for preparing mold steel powder for a selective laser melting process (SLM), comprising the following steps: Step 1: obtaining metal powder in a required particle size range;

[0030] Step 2: Send the powder of step 1 into the shaping equipment;

[0031] Step 3: Sieve the powder in the collector to obtain a powder with a particle size of 15-53 microns;

[0032] The metal powder obtained in step 1 is mold steel powder prepared by gas atomization method, the composition is standard 1.2709 brand, and the particle size is -100 mesh. The powder flow rate in step 2 is 700KG / h. After the treatment, the powder in the collector is sieved to obtain a finished powder of 15-53 μm. The shape of the mold steel powder obtained in this embodiment is as follows: figure 2 As shown, the average particle size is 34.56μm, the fluidity is 13.7S / 50g, and the bulk density is 4.15g / cm 3 . The powder has good fluidity, uniform structure, and mechanical properties that meet the req...

Embodiment 3

[0034] A preparation method of copper alloy powder for three-dimensional printing process (3DP), comprising the steps of:

[0035] Step 1: Obtain metal powder in the required particle size range;

[0036] Step 2: Send the powder of step 1 into the shaping equipment;

[0037] Step 3: directly obtain the processed copper alloy powder in the collector;

[0038] The metal powder obtained in step 1 is CuSn alloy powder prepared by gas atomization method, and the particle size is 15-53 μm. The powder flow rate in step 2 is 400KG / h. The finished powder is obtained directly in the collector after processing. The CuSn powder obtained in this example has an average particle size of 33.9 microns, fluidity of 11S / 50g, and bulk density of 4.85g / cm 3 . The powder has good fluidity during the printing process, the formed parts have little deformation, the structure is uniform, and the mechanical properties meet the requirements of use.

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Abstract

The invention relates to a preparation method of metal powder for additive manufacturing. The preparation method is characterized in that powder within the specific particle size range is taken as a raw material, and the metal powder applicable to an additive manufacturing technology is obtained through shaping treatment; and powder raw materials include, but not limited to stainless steel, tool steel, aluminum alloy, copper alloy, nickel base high temperature alloy and titanium alloy powder and the like prepared by processes like gas atomization, water atomization and breaking. Compared with the prior art, the metal powder which has good flowability, high apparent density and good degree of sphericity can be prepared by the preparation method efficiently with low cost, and the technical requirements on the metal powder by the additive manufacturing are met.

Description

technical field [0001] The invention belongs to the technical field of preparation of spherical powder materials, and relates to a preparation method of metal powder for additive manufacturing. Background technique [0002] Additive manufacturing technology, also known as 3D printing technology, constructs objects by superimposing them layer by layer. Compared with traditional subtractive or equal material manufacturing, additive manufacturing has obvious advantages in the realization of complex shapes and material utilization. It is foreseeable that 3D printing will be widely used when industrial manufacturing enters a new stage of intelligence and precision. In recent years, 3D printing technology is gradually being applied to the manufacture of actual products, especially metal 3D printing, which is developing particularly rapidly. In metal 3D printing, the performance of the powder material largely determines the performance of the printed product, so it has also becom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B33Y70/00
CPCB33Y70/00B22F1/065B22F1/14
Inventor 张少明贺会军张金辉赵新明盛艳伟赵文东朱学新刘英杰刘建王志刚安宁
Owner BEIJING COMPO ADVANCED TECH