Preparation method for Pt-Zr modified aluminide coating

A technology of aluminide and coating, which is applied in the direction of coating, metal material coating process, electrolytic coating, etc., can solve the problems that the Zr layer is not easy to disperse, popularize and apply, and not easy to deposit, so as to achieve uniform distribution and controllable coating Strong resistance and prolonging the service life

Inactive Publication Date: 2017-10-20
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Application Information

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Problems solved by technology

This method has certain operability, but because EB-PVD equipment requires a high vacuum environment, the cost is high, it is not easy to deposit on workpieces with complex shapes, and the introduced Zr layer is not easy to disperse during the aluminizing process, so it is difficult to be popularized and applied

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  • Preparation method for Pt-Zr modified aluminide coating
  • Preparation method for Pt-Zr modified aluminide coating
  • Preparation method for Pt-Zr modified aluminide coating

Examples

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Embodiment 1

[0032] Preparation method of Zr-modified β-(Ni,Pt)Al single-phase coating

[0033] After sandblasting the matrix alloy, carry out two-step degreasing treatment: the first step is ultrasonic cleaning with acetone for 15-30min, the second step is boiling in 40-60g / L NaOH solution for 10min; after degreasing, the sample is placed in a Electroplating is carried out in the Pt plating solution of Zr particles. During electroplating, the temperature of the plating solution is kept in the range of 40°C-60°C, the pH value is between 1.0-3.0, and the current density during electroplating is 4-20mA / cm 2. The Zr particles are evenly suspended in the plating solution, and the particle size of the Zr particles is 0.1-10 μm. In order to keep the Zr particles in a suspended state, stir with a magnetic stirrer at a stirring speed of 10-30r / min. When the thickness of the coating is greater than 5 μm, take out the sample, ultrasonically clean the Zr particles remaining on the surface of the sa...

Embodiment 2

[0038] Zr modified PtAl 2 Preparation method of +β-(Ni,Pt)Al dual-phase coating

[0039] After surface treatment of the base alloy, a composite coating of 5 μm to 8 μm is electroplated according to the method described in Example 1. The samples after electroplating were ultrasonically cleaned to remove residual Zr particles on the surface.

[0040] Aluminizing is carried out by vapor phase aluminizing. Before aluminizing, clean the sample ultrasonically in ethanol for 5-10 minutes, and after drying, hang the sample at a position 5-10 cm above the infiltrating agent. Penetration agent consists of Fe-Al powder and active agent NH 4 Cl composition, wherein the Al content is about 51wt.%. The aluminizing method with high temperature and low activity is adopted, the aluminizing temperature is 1060°C, and the holding time is 5h. During the aluminizing process, Ar gas is filled as a protective gas. After the heat preservation is completed, it is cooled to room temperature with t...

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Abstract

The invention relates to a preparation method for a Pt-Zr modified aluminide coating. The preparation method comprises the following steps that surface treatment is carried out, pure Zr particles with the grain size ranging from 0.1 micron to 10 microns are added into conventional platinum plating bath, and a magnetic stirring instrument is used for stirring a mixed solution until even suspension is formed; the electroplating condition is set, wherein a Pt-Zr composite Pt-Zr method is adopted, in the process that an Zr element is led into the coating, except for basic electroplating equipment, the magnetic stirring instrument is led in to stir the solution, and the solution keeps to stay in the suspension state; electroplating solution maintenance is carried out, wherein Zr fine grains are added, a target platinum plating solution is supplemented, and the pH value is adjusted; a composite platinum plating is obtained after electroplating and is subject to annealing in a vacuum annealing furnace; and embedding, slurry and CVD chemical vapor deposition alumetizing are adopted, and the Pt-Zr modified high temperature protection aluminide coating is obtained. The preparation method has the beneficial effects that the method is easy, convenient and quick, and saves cost; meanwhile, the contents of the Pt and Zr contents are controllable, and distribution is even; and requirements for workpiece shape and size are avoided, and the service life of an engine blade component is obviously prolonged.

Description

technical field [0001] The invention relates to composite electroplating technology, in particular to a method for preparing a Pt-Zr modified aluminide coating. A composite electroplating method is used to obtain a Pt-Zr composite coating, and then Pt-Zr modified Pt-Zr coatings with different structures are obtained through different aluminizing methods. permanent aluminide coating. Background technique [0002] Engine turbine components, such as turbine blades, usually require high-temperature protective coatings to protect the superalloy substrate from high-temperature oxidation and hot corrosion, and effectively extend the service life of components. Common high-temperature protective metal bonding layers include simple aluminide coatings, modified aluminide coatings (Cr-, Si-, Pt-, Pd-modified) and MCrAlY type cladding coatings. Due to the simple preparation process, low cost and good repeatability, aluminide coatings have been applied to cobalt-based guide vanes since ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/56C25D15/00C25D5/50C23C10/48C23C28/02
CPCC25D3/567C23C10/48C23C28/021C23C28/023C25D5/50C25D15/00
Inventor 鲍泽斌蒋成洋阳颖飞朱圣龙王福会
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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