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Stainless steel powder for additive manufacturing, and preparation method thereof

It is a technology of additive manufacturing and powder preparation, which is applied in the field of metal and alloy powder preparation. It can solve the problems that the oxygen content of the powder is easy to rise, it is difficult to meet the high-performance metal, and the particle size of the powder is difficult to control. Fluidity, simple and efficient preparation method

Inactive Publication Date: 2018-08-21
GUANGDONG ZHENGDE MATERIAL SURFACE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the preparation method of 3D printed stainless steel materials is mainly gas atomization powder making, gas atomization powder making can obtain a powder with a certain degree of sphericity and fluidity, but during the gas atomization process, the oxygen of the powder The content is easy to increase, the particle size of the powder is difficult to control, and the prepared powder is difficult to meet the requirements of high-performance metal 3D printing powder

Method used

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  • Stainless steel powder for additive manufacturing, and preparation method thereof
  • Stainless steel powder for additive manufacturing, and preparation method thereof
  • Stainless steel powder for additive manufacturing, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Stainless steel powder preparation method, the steps are as follows:

[0038] (1) In the sieving system of Artech Swiss ultrasonic sieving machine, the original stainless steel powder A is classified and processed to obtain the stainless steel powder B suitable for the particle size distribution of additive manufacturing. The effective screening diameter of the sieve is φ520mm, and the size of the sieve is 325 mesh and 500 mesh;

[0039](2) In the spheroidization of the Tekna plasma system TekNano-40NanopowderSynthesissystem, the stainless steel powder B is spheroidized to obtain the stainless steel powder C. Among them, the system parameters are: the sheath gas of the plasma system is argon-hydrogen mixed gas, the flow rate of argon is 60L / min, and the flow rate of hydrogen is 15L / min; the central gas of the plasma system is argon, and the flow rate is 35L / min. The carrier gas of the plasma system is argon with a flow rate of 10 L / min. The powder feeding rate is 80g / ...

Embodiment 2

[0044] Stainless steel powder preparation method, the steps are as follows:

[0045] (1) In the sieving system of Artech Swiss ultrasonic sieving machine, the original stainless steel powder A is classified and processed to obtain the stainless steel powder B suitable for the particle size distribution of additive manufacturing. The effective screening diameter of the sieve is φ520mm, and the size of the sieve is 325 mesh and 500 mesh;

[0046] (2) In the spheroidization of the Tekna plasma system TekNano-40NanopowderSynthesissystem, the stainless steel powder B is spheroidized to obtain the stainless steel powder C. Among them, the system parameters are: the sheath gas of the plasma system is argon-hydrogen mixed gas, the flow rate of argon is 60L / min, and the flow rate of hydrogen is 10L / min; the central gas of the plasma system is argon, and the flow rate is 35L / min. The carrier gas of the plasma system is argon with a flow rate of 10 L / min. The powder feeding rate is 100...

Embodiment 3

[0052] Stainless steel powder preparation method, the steps are as follows:

[0053] (1) In the sieving system of Artech Swiss ultrasonic sieving machine, the original stainless steel powder A is classified and processed to obtain the stainless steel powder B suitable for the particle size distribution of additive manufacturing. The effective screening diameter of the sieve is φ520mm, and the size of the sieve is 325 mesh and 500 mesh;

[0054] (2) In the spheroidization of the Tekna plasma system TekNano-40NanopowderSynthesissystem, the stainless steel powder B is spheroidized to obtain the stainless steel powder C. Among them, the system parameters are: the sheath gas of the plasma system is argon-hydrogen mixed gas, the flow rate of argon is 80L / min, and the flow rate of hydrogen is 15L / min; the central gas of the plasma system is argon, and the flow rate is 25L / min. The carrier gas of the plasma system is argon with a flow rate of 10 L / min. The powder feeding rate is 60g...

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Abstract

The invention discloses a high-sphericity stainless steel powder for additive manufacturing, and a preparation method thereof. The preparation method comprises the preparation steps of screening, spheroidizing, cleaning and drying. The preparation method provided by the invention is simple, high in production efficiency, high in finished product quality, suitable for mass production, and capable of meeting the demand of additive manufacturing; and meanwhile, the prepared stainless steel powder is excellent in performance, compact in powder structure, and stable in performance, so that the stainless steel powder for additive manufacturing can be applied to a worse working condition.

Description

technical field [0001] The invention relates to the technical field of metal and alloy powder preparation, in particular to a stainless steel powder for additive manufacturing and a preparation method thereof. Background technique [0002] Additive Manufacturing technology (Additive Manufacturing, AM) is also called 3D printing technology. Additive manufacturing technology is mainly based on computer-aided design, material processing and molding technology and digital models. Through programming and numerical control system, special printing materials, Such as metal materials, ceramic materials, inorganic materials, etc., are piled up layer by layer through various methods such as extrusion, sintering, melting, solidification, spraying, etc., to create a new manufacturing technology with entities. [0003] Additive manufacturing (AM) technology is the process of connecting materials to make objects based on three-dimensional CAD data. Compared with subtractive manufacturing,...

Claims

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Application Information

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IPC IPC(8): B22F9/14B22F1/00C23G5/02B33Y70/00
CPCC23G5/02B22F9/14B33Y70/00B22F1/065
Inventor 曾德长邹永鸣邱金勇邱兆国吴姚莎
Owner GUANGDONG ZHENGDE MATERIAL SURFACE TECH
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