Construction process of environment-friendly organic aluminized chromium slurry

A construction technology and environment-friendly technology, applied in the field of aluminized chromium, can solve the problems of difficult seepage prevention, dust hazards, etc., and achieve the effects of protecting health, ensuring quality, and reducing foaming

Pending Publication Date: 2022-02-01
CHINA HANGFA SOUTH IND CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention provides an environment-friendly construction process of organic aluminized chromium slurry to solve the technical problems that the existing aluminized chromized layer is difficult to prevent seepage and has dust hazards

Method used

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  • Construction process of environment-friendly organic aluminized chromium slurry
  • Construction process of environment-friendly organic aluminized chromium slurry
  • Construction process of environment-friendly organic aluminized chromium slurry

Examples

Experimental program
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Effect test

Embodiment 1

[0054] The construction technology of environment-friendly organic aluminized chromium slurry is used to form an aluminized chromium coating on turbine working blades, including the following steps:

[0055] S1. Mix aluminum powder, chromium powder, ethanol, polyvinyl alcohol and water in a mass fraction ratio of 40%: 20%: 10%: 4%: 26%, and grind them in a ball mill for ≥ 20 hours to obtain an organic aluminized chromium material pulp, spare;

[0056] S2. Use aviation washing gasoline to clean the workpiece, dry in an oven at 80°C for 30 minutes, heat up to 400°C, dry for 30 minutes, and protect the non-permeable layer with adhesive tape after cooling;

[0057] S3. Perform corundum sand blowing treatment on the surface to be infiltrated. The particle size of the corundum sand is 240 mesh and the pressure is 0.2 MPa. Sand blowing until the surface to be infiltrated is uniform gray-white, and the interval between sand blowing and spraying shall not exceed 4 hours;

[0058] S4. ...

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Abstract

The invention discloses a construction process of environment-friendly organic aluminized chromium slurry. The process comprises the following steps: S1, uniformly mixing aluminum powder, chromium powder, ethanol, polyvinyl alcohol and water, and grinding to obtain the organic aluminized chromium slurry for later use; S2, cleaning and drying the workpiece , and then protecting the non-permeating face of the workpiece; S3, subjecting the to-be-infiltrated face of the workpiece to sand blasting treatment till the to-be-infiltrated face is in uniform grey white; S4, preheating the workpiece, and after preheating, spraying the organic aluminized chromium slurry to the to-be-infiltrated face of the workpiece for 3-4 times so as to obtain an aluminized chromium coating of 80-120 microns; S5, removing the protection of the non-seeping surface of the workpiece sprayed with the aluminized chromium coating, and then subjecting the workpiece to curing treatment; S6, detecting the appearance and the thickness of the aluminized and chromized coating of the workpiece after curing treatment; S7, subjecting the workpiece to heating and heat preservation, and performing diffusion and cooling; and S8, subjecting the surface of the workpiece to sand blasting treatment to obtain the turbine working blade containing the aluminized chromium coating.

Description

technical field [0001] The invention relates to the technical field of aluminizing chromium, in particular to an environment-friendly construction process of organic aluminizing chromium slurry. Background technique [0002] Prepare an aluminum chromizing layer on the surface of the engine turbine working blade substrate to improve its resistance to high temperature oxidation and gas corrosion. The current aluminum chromium co-infiltration mostly adopts the solid infiltration embedding method, which is suitable for the overall aluminized chromium Parts, for parts that are partly aluminized and chromized, when the embedding method is used, the non-permeated surface must be protected. Because the temperature of the aluminum-chromium co-infiltration process is high (above 1000 ° C), it is difficult to prevent seepage, and improper protection may easily cause leakage As a result, the parts are scrapped, and the solid infiltration embedding method has dust hazards, which poses a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D7/24B05D1/02B05D3/00B05D3/02B05D3/04
CPCB05D7/24B05D1/02B05D3/002B05D3/007B05D3/0254B05D3/048
Inventor 李秀林李克董杨尹邦柱张莉谢成寻丹王国奇
Owner CHINA HANGFA SOUTH IND CO LTD
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