A preparation method of nickel-based superalloy powder for 3D printing

A nickel-based superalloy and 3D printing technology, which is applied in the field of powder metallurgy, can solve problems such as the complex atomization process of nickel-based superalloy powder, and achieve the effects of low oxygen content, cost reduction, and high sphericity

Active Publication Date: 2016-08-24
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the atomization process of nickel-based superalloy powder is extremely complex, involving multiple disciplines such as fluid mechanics, materials science, and physical chemistry. Multi-factor coupling optimization design can prepare high-quality spherical low-oxygen nickel-based superalloy powder

Method used

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  • A preparation method of nickel-based superalloy powder for 3D printing
  • A preparation method of nickel-based superalloy powder for 3D printing
  • A preparation method of nickel-based superalloy powder for 3D printing

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Embodiment 1

[0025] The steps of the method for preparing nickel-based superalloy powder for 3D printing by adopting the technical solution of the present invention are as follows:

[0026] (1) Vacuum smelting: put 150kg of In718 nickel-based superalloy master alloy bars into the crucible of the atomization powder making furnace, and use intermediate frequency power supply to inductively heat the bars under 0.08Pa vacuum;

[0027] (2) Degassing: After the master alloy is melted, vacuum degassing for 15 minutes;

[0028] (3) Refining: Fill the furnace with high-purity argon to 0.1MPa, the purity of the high-purity argon is 99.999wt%, the oxygen content in the argon is 0.00005%, and the molten metal is kept at 1600°C for 15 minutes;

[0029] (4) Atomization: The molten metal flows down through the guide tube at a weight flow rate of 5kg / min, and is broken into fine droplets by 3MPa high-pressure, high-purity argon gas. The droplets are cooled and solidified to form spherical powder, and ente...

Embodiment 2

[0033] The steps of the method for preparing nickel-based superalloy powder for 3D printing by adopting the technical solution of the present invention are as follows:

[0034] (1) Vacuum smelting: put 200kg FGH96 nickel-based superalloy master alloy rod into the crucible of the atomization powder making furnace, and use intermediate frequency power supply to inductively heat the rod under 0.05Pa vacuum;

[0035] (2) Degassing: After the master alloy is melted, vacuum degassing for 20 minutes;

[0036] (3) Refining: Fill the furnace with high-purity argon to 0.1MPa, the purity of the high-purity argon is 99.999wt%, the oxygen content in the argon is 0.00006wt%, and the molten metal is kept at 1640°C for 15min;

[0037] (4) Atomization: The metal liquid flows down through the guide tube at a weight flow rate of 8kg / min, and 4MPa high-pressure, high-purity argon gas is used to break the metal liquid flow into fine droplets, and the droplets are cooled and solidified to form a sp...

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Abstract

The invention discloses a preparation method of nickel-based high-temperature alloy powder for 3D (Three Dimensional) printing. According to the method, high-performance nickel-based high-temperature alloy powder, which meets the requirement of 3D printing, is obtained through vacuum smelting, degassing, refining, atomization and sieving technologies of nickel-based high-temperature alloy. The problem of difficulty in preparation of the low-cost high-performance nickel-based high-temperature alloy powder for the 3D printing process is solved. The method has the characteristics of simplicity, effectiveness and low cost, the oxygen content of the gas atomized nickel-based high-temperature alloy powder can be obviously reduced, and the sphericity and the fine powder yield of the powder are improved.

Description

technical field [0001] The invention relates to a method for preparing nickel-based superalloy powder for 3D printing, which belongs to the technical field of powder metallurgy. Background technique [0002] 3D printing (additive manufacturing) technology has become one of the most concerned emerging technologies in the world. Its special materials, especially the powder industry for 3D printing of high-performance nickel-based superalloy components used in aerospace, have a good development prospect. [0003] The 3D printing technology of high-performance nickel-based superalloy components started in the early 1990s. The process is relatively difficult. High-power energy beams such as lasers or electron beams are mainly used as heat sources to melt the powder materials in selected areas, and form strict after cooling and crystallization. Build-up layers manufactured to design, where the build-up layers are continuously molded to form the final product. So far, 3D printing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/08
Inventor 许文勇张国庆李周袁华刘娜
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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