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

A nickel-based superalloy, 3D printing technology, applied in metal processing equipment, improvement of process efficiency, additive manufacturing, etc., can solve problems such as difficulty in meeting 3D printing requirements, poor composition uniformity, low powder yield, etc., to eliminate Poor fusion or even cracking phenomenon, easy to crack, and uniform powder composition

Active Publication Date: 2021-06-29
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The powders used for 3D printing nickel-based superalloys still have problems such as poor compositional uniformity, high oxygen content, poor sphericity, and low yield of powders suitable for 3D printing particle size distribution.
However, for "non-weldable" nickel-based superalloys, it is easy to crack and difficult to form during the 3D printing forming process, and the prepared powder is difficult to meet the 3D printing requirements of high-performance nickel-based superalloy parts
At the same time, there is no relevant record that the combination of microalloying and powder making technology can achieve the greatest probability of reducing cracks in the 3D printing process

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] The method of the present invention is used for the following René 104 nickel-based superalloy, the added mass fraction is 0.08% rare earth element, and the weight percentage of the alloy is: 20.6Co~13Cr~3.4Al~3.9Ti~3.8Mo~2.1W~2.4Ta~0.9 Nb~0.05Zr~0.03B~0.04C~0.08Sc~the balance is Ni. The steps of preparing nickel-based superalloy powder for 3D printing by adopting the technical scheme of the present invention are as follows:

[0073] (1) Vacuum smelting: put the René 104 nickel-based superalloy raw material with a mass fraction of 0.08% rare earth Sc element into the crucible of the atomization powder making furnace, and conduct heating and smelting in a vacuum atmosphere of 0.05Pa by using an intermediate frequency power supply induction;

[0074] (2) Degassing: After the raw materials are melted and completely alloyed, vacuum degassing for 15 minutes;

[0075] (3) Refining: Fill the furnace with high-purity argon to 0.1MPa, the purity of argon is 99.99wt%, the oxygen...

Embodiment 2

[0083] The method of the present invention is used for the following René 104 nickel-based superalloy, the added mass fraction is 0.08% rare earth element, and the weight percentage of the alloy is: 20.6Co~13Cr~3.4Al~3.9Ti~3.8Mo~2.1W~2.4Ta~0.9 Nb~0.05Zr~0.03B~0.04C~0.08Y~the balance is Ni. The steps of preparing nickel-based superalloy powder for 3D printing by adopting the technical scheme of the present invention are as follows:

[0084] (1) Vacuum smelting: put the René 104 nickel-based superalloy raw material with a mass fraction of 0.08% rare earth Y element into the crucible of the atomization powder making furnace, and conduct heating and smelting in a vacuum atmosphere of 0.05Pa by using an intermediate frequency power supply induction;

[0085] (2) Degassing: After the raw materials are melted and completely alloyed, vacuum degassing for 15 minutes;

[0086] (3) Refining: Fill the furnace with high-purity argon to 0.1MPa, the purity of argon is 99.99wt%, the oxygen c...

Embodiment 3

[0091] The method of the present invention is used for the following René 104 nickel-based superalloy, the added mass fraction is 0.08% rare earth element, and the weight percentage of the alloy is: 20.6Co~13Cr~3.4Al~3.9Ti~3.8Mo~2.1W~2.4Ta~0.9 Nb~0.05Zr~0.03B~0.04C~0.04Sc~0.04Y~the balance is Ni. The steps of preparing nickel-based superalloy powder for 3D printing by adopting the technical scheme of the present invention are as follows:

[0092] (1) Vacuum smelting: Put the René104 nickel-based superalloy raw material with added mass fraction of 0.04% Sc and 0.04% Y element into the crucible of the atomizing powder making furnace, and heat it by induction in a vacuum atmosphere of 0.05Pa smelting;

[0093] (2) Degassing: After the raw materials are melted and completely alloyed, vacuum degassing for 15 minutes;

[0094] (3) Refining: Fill the furnace with high-purity argon to 0.1MPa, the purity of argon is 99.99wt%, the oxygen content in argon is 0.00006wt%, and the molten ...

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Abstract

The invention provides a nickel-based superalloy for 3D printing and a powder preparation method thereof, belonging to the technical field of superalloys and additive manufacturing. Aiming at the problem that "non-weldable" powder nickel-based superalloys are easy to crack during the 3D printing process, the present invention prepares a 3D alloy through rare earth microalloying, combined with vacuum smelting, degassing, refining, and atomization and screening processes with reasonable parameters. Nickel-based superalloys and their powders required for printing. The present invention significantly reduces the cracking sensitivity of "non-weldable" powdered nickel-based superalloys, widens the 3D printing process window, and the printed parts have no cracks and excellent mechanical properties; at the same time, the powder prepared by the present invention has high sphericity, Good fluidity and less special-shaped powder, greatly improving the yield of 15-53μm fine powder and 53-106μm medium-size powder required for 3D printing, meeting the needs of high-quality, low-cost nickel-based superalloy 3D printing Use powder on demand.

Description

technical field [0001] The invention provides a nickel-based superalloy for 3D printing and a powder preparation method thereof, belonging to the technical field of superalloys and additive manufacturing. Background technique [0002] With the rapid development of metal 3D printing technology, the demand for high-quality, low-cost metal powder is increasing. The development of high-performance nickel-based superalloy 3D printing technology for aerospace is limited by the "weldability" of nickel-based superalloy and the quality of its powder. At present, the nickel-based superalloys used for 3D printing are mainly IN718, IN625, etc., which have good 3D printing forming properties, but their overall performance is worse than that of powdered nickel-based superalloys. Due to the high content of Al and Ti in the powdered nickel-based superalloy, the crack sensitivity is high, and cracks are prone to occur during the 3D printing process, which brings great challenges to the 3D p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C19/05C22C30/00B22F1/00B22F9/08B33Y70/00
CPCC22C19/056C22C30/00B22F9/082B33Y70/00B22F2009/0836B22F2009/0848B22F2009/0896B22F1/065B22F10/28B33Y10/00C22C1/0433B22F1/05B22F2009/0824B22F2009/0844B22F2999/00B22F10/36B22F10/366B33Y50/02Y02P10/25B22F2201/20B22F2202/07B22F2201/10B22F2201/11B22F2201/12B22F2202/01B33Y40/10
Inventor 刘祖铭魏冰农必重吕学谦任亚科曹镔艾永康
Owner CENT SOUTH UNIV
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