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A method for preparing solid spherical metal powder for additive manufacturing

A technology of additive manufacturing and metal powder, which is applied in the field of additive manufacturing, can solve the problems of wide particle size range of atomized powder and many satellite powders, and achieve the effect of good fluidity, high sphericity and changing powder particle size distribution

Active Publication Date: 2020-04-07
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is that the current atomized powder has a wide particle size range, many satellite powders, and a large number of hollow defects. The powder prepared by the method of the present invention has a uniform particle size, no solid defects, and good sphericity. , high fluidity, meet the requirements of additive manufacturing

Method used

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  • A method for preparing solid spherical metal powder for additive manufacturing
  • A method for preparing solid spherical metal powder for additive manufacturing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The Renè 104 nickel-based superalloy powder is produced by argon atomization, and the powder with a particle size of <200 μm is obtained after sieving, and then the powder is mechanically ball-milled, and 150 g of powder is placed in each ball-milling pot, and the total mass of the atomized powder is put into 0.5% stearic acid to prevent cold welding, according to the mass ratio of the ball to material 10:1, the diameter of the grinding ball is 10mm, 8mm, 5mm, 3mm, and the mass ratio is 1:2:1:5, weigh the grinding ball 1500g is put into the ball mill jar. Seal the ball mill tank, carry out vacuuming, the vacuum degree is less than or equal to 0.1Pa, and fill it with high-purity argon. Put the ball mill jar into the vertical planetary ball mill, set the mechanical ball mill parameters, the number of revolutions is 225r / min, the mechanical ball mill time is 25h, and carry out mechanical ball milling.

[0044] The collected powder is subjected to plasma spheroidization tr...

Embodiment 2

[0055] The Renè 104 nickel-based superalloy powder is produced by argon atomization, and the powder with a particle size of <200 μm is obtained after sieving, and then the powder is mechanically ball-milled, and 150 g of powder is put into each ball-milling tank. According to the ball-to-material ratio of 11:1, The diameters of the grinding balls are 20mm, 10mm, 8mm, 5mm, and the mass ratio is 1:1:1:2. Weigh 1650g of the grinding balls and put them into the ball milling tank. Seal the ball mill tank, carry out vacuuming, the vacuum degree is less than or equal to 0.1Pa, and fill it with high-purity argon. Put the ball mill jar into the vertical planetary ball mill, set the mechanical ball mill parameters, the number of revolutions is 300r / min, the mechanical ball mill time is 35h, and carry out mechanical ball milling.

[0056] The collected powder is subjected to plasma spheroidization treatment. The parameters of spheroidization treatment are: argon protection is introduced ...

Embodiment 3

[0059] The 316L stainless steel powder is prepared by argon atomization, and the powder with a particle size of <200 μm is obtained after sieving, and then the powder is mechanically ball milled, and 150 g of powder is put into each ball mill tank, and 0.6% of the total mass of the atomized powder is put in Stearic acid to prevent cold welding, according to the ball-to-material ratio of 12:1, the diameter of the grinding balls is 10mm, 8mm, 5mm, 3mm, and the mass ratio is 1:2:1:5, weigh 1800g of grinding balls and put them into the ball mill in the can. Seal the ball mill tank, carry out vacuuming, the vacuum degree is less than or equal to 0.1Pa, and fill it with high-purity argon. Put the ball mill jar into the vertical planetary ball mill, set the mechanical ball mill parameters, the number of revolutions is 250r / min, the mechanical ball mill time is 30h, and perform mechanical ball milling.

[0060] The collected powder is subjected to plasma spheroidization treatment. Th...

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Abstract

The invention provides a method for preparing solid spherical metal powder for additive manufacturing, belonging to the field of additive manufacturing. According to the different needs of different additive manufacturing processes for powder, mechanical ball milling and plasma spheroidization can be carried out on the atomized powder, and the ball milling of the required particle size range can be prepared by grinding balls with different diameters and ball milling parameters. powder, and then use plasma spheroidization to spheroidize the ball-milled powder to obtain a powder with uniform particle size distribution, solid and defect-free, high sphericity, and good fluidity, which fully meets the requirements of additive manufacturing.

Description

technical field [0001] The invention provides a method for preparing solid spherical metal powder for additive manufacturing, belonging to the field of additive manufacturing. Background technique [0002] Additive manufacturing technology has unique advantages in preparing components with complex shapes, and can improve production efficiency and reduce material waste. It has broad application prospects in aerospace, transportation, biomedical and other fields. [0003] Additive manufacturing has a large demand for powder and high quality requirements, especially no hollow defects, high sphericity, and uniform particle size distribution. Among them, in addition to the requirements for hollow defects and sphericity in additive manufacturing, powder bed fusion usually requires powder particle size to be less than 50 μm, and coaxial powder feeding requires powder particle size to be within the range of 15-100 μm. At present, powders for additive manufacturing are mainly prepar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/04B22F9/14B33Y70/00
CPCB22F9/04B22F9/14B33Y70/00B22F2009/043B22F2009/042B22F2999/00B22F2998/10B22F1/065B22F2201/11
Inventor 刘祖铭彭凯李全赵凡吕学谦魏冰
Owner CENT SOUTH UNIV
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