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3D printing nickel-based high-temperature alloy aluminizing coating aluminizing agent and aluminizing method

A nickel-based superalloy, 3D printing technology, applied in the direction of metal material coating process, coating, solid diffusion coating, etc., can solve the problem of poor bonding of aluminized coating, uneven thickness of aluminized coating, coating Problems such as poor bonding effect, to avoid uneven aluminizing, improve bonding performance, and increase fluidity

Active Publication Date: 2021-04-06
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional solid permeating agent has the following disadvantages: (1) The fluidity of the permeating agent is poor, and it is difficult to completely coat the substrate; (2) The thickness of the aluminized coating is uneven; (3) The aluminized coating is not firmly bonded , easy to fall off
However, in practice, due to the inconsistent current density, it is easy to produce uneven coating coating, resulting in poor coating bonding effect and other problems.

Method used

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  • 3D printing nickel-based high-temperature alloy aluminizing coating aluminizing agent and aluminizing method
  • 3D printing nickel-based high-temperature alloy aluminizing coating aluminizing agent and aluminizing method
  • 3D printing nickel-based high-temperature alloy aluminizing coating aluminizing agent and aluminizing method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Aluminum powder, silicon powder, and chromium powder are all obtained by gas atomization powder making, and their powder spherical rates are 93%, 94%, and 93% respectively; the corresponding average particle sizes are 15 μm, 17 μm, and 20 μm. The copper powder is prepared by the rotating electrode powder making method, the spherical rate of the powder is 95%, and the average particle size of the powder is 60 μm. The aviation kerosene that kerosene adopts in the present embodiment.

[0026] The composition of the aluminizing agent is determined as aluminum powder content 83%, silicon powder content 8%, chromium powder content 6%, auxiliary agent content 3.0%, wherein: ammonium chloride content 0.5%, copper powder content 2%, kerosene content 0.5% . First, the powder is vacuum-packed in a sealed tank according to the proportion, leaving one-third of the remaining space in the tank, and placed on a ball mill to mix the powder for 8 hours at room temperature. Then add a p...

Embodiment 2

[0038] Aluminum powder, silicon powder, and chromium powder are all obtained by gas atomization powder making, and their powder spherical ratios are 94.5%, 94%, and 94% respectively; the corresponding average particle sizes are 18 μm, 19 μm, and 22 μm, respectively. The copper powder is prepared by a rotating electrode powder making method, the spherical rate of the powder is 96%, and the average particle size of the powder is 65 μm. The aviation kerosene that kerosene adopts in the present embodiment.

[0039] The composition of the aluminizing agent is 85% of aluminum powder, 6% of silicon powder, 6% of chromium powder, 3.0% of auxiliary agent, among which the content of ammonium chloride is 0.7%, the content of copper powder is 1.8%, and the content of kerosene is 0.5%. First, the powder is vacuum-packed in a sealed tank according to the proportion, leaving one-third of the remaining space in the tank, and placed on a ball mill to mix the powder for 9 hours at room temperat...

Embodiment 3

[0042] Aluminum powder, silicon powder, and chromium powder are all obtained by gas atomization powder making, and their powder spherical ratios are 93%, 95%, and 93.5% respectively; the corresponding average particle sizes are 20μm, 16μm, and 22μm, respectively. The copper powder is prepared by a rotating electrode powder making method, the spherical rate of the powder is 97%, and the average particle size of the powder is 55 μm. The aviation kerosene that kerosene adopts in the present embodiment.

[0043] The composition of the aluminizing agent is determined to be 88% of aluminum powder, 5% of silicon powder, 4% of chromium powder, 3.0% of auxiliary agent, 0.5% of ammonium chloride, 1.8% of copper powder and 0.7% of kerosene. First, the powder is vacuum-packed in a sealed tank according to the proportion, leaving one-third of the remaining space in the tank, and placed on a ball mill to mix the powder for 10 hours at room temperature. Then add a predetermined proportion o...

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Abstract

The invention discloses a 3D printing nickel-based high-temperature alloy aluminizing coating aluminizing agent and an aluminizing method. The aluminizing agent is composed of the following components in percentage by mass: 4-11% of silicon powder, 2-6% of chromium powder, 2-4% of an auxiliary agent, and the balance of aluminum powder, wherein the auxiliary agent is composed of kerosene, ammonium chloride and copper powder. In order to improve the flowability of the powder, the raw materials of the aluminum powder, the chromium powder and the silicon powder are all prepared through a gas atomization powder making process, the powder with the high spherical rate is obtained, and the flowability of the powder can be better guaranteed; kerosene is further adopted as the auxiliary agent, so that a lubricating effect can be achieved, and the flowability of the powder is further improved; the stability and bondability of a coating are improved; and the auxiliary agent kerosene is adopted, and the kerosene further has a wetting effect besides a lubricating effect, so that the powder is more attached to a matrix, the aluminizing agent can uniformly permeate into the matrix during subsequent sintering, and the bonding performance of the coating is improved.

Description

technical field [0001] The invention belongs to the technical field of metal material surface treatment, and in particular relates to an aluminizing agent for 3D printing a nickel-based superalloy aluminizing coating and a method for aluminizing. Background technique [0002] With the vigorous development of the aerospace industry, higher performance requirements are put forward for the aero-engine, known as the heart of the aircraft, in order to achieve a higher thrust-to-weight ratio. At present, the most important measure is to increase the inlet temperature of aero-engines. The inlet temperature of advanced aero-engines can reach above 1900K. Among them, the temperature of the engine blade, which is an important part of the turbine engine, can reach above 1300K. In order to ensure that the engine blade can work stably for a long time at high temperature, it is necessary to coat the blade with a coating to improve its high temperature resistance to oxidation and corrosio...

Claims

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Application Information

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IPC IPC(8): C23C10/56B22F10/60B33Y40/20
CPCB22F3/26B33Y40/20C23C10/56
Inventor 李瑞迪邓操
Owner CENT SOUTH UNIV
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