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Method for introducing rare metal Hf element into coating

A rare metal and coating technology, applied in the field of composite electroplating, can solve the problems of difficult dispersion of Hf layer, difficulty in popularization and application, and high cost, and achieve the effect of low preparation cost, simple equipment requirements, and easy operation

Inactive Publication Date: 2017-01-04
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, 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 Hf layer is not easy to disperse during the aluminizing process, so it is difficult to be popularized and applied.

Method used

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  • Method for introducing rare metal Hf element into coating
  • Method for introducing rare metal Hf element into coating
  • Method for introducing rare metal Hf element into coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032]Ni-Hf composite electroplating: Nickel plating adopts traditional Watt-type nickel plating solution. The composition of the plating solution and the nickel plating process are shown in Table 1. Take an appropriate amount of Hf powder after grinding (with a particle size of 0.1-10 μm) and place it in the nickel plating solution, and fully mix the powder with the electroplating solution under the stirring of a magnetic stirrer. The sample used is nickel-based single crystal superalloy DD413, and the sample size is Φ15×2mm. Before electroplating, the sample needs to be polished with 150#, 240#, 400# SiC sandpaper in sequence, and then subjected to water blasting treatment, followed by ultrasonic degreasing with acetone 30min, and ultrasonically cleaned with alcohol and deionized water for 15min, respectively, and finally soaked the sample in 50g / L NaOH and heated to boiling to remove excess oil on the surface of the sample. The degreased samples were ultrasonically cleaned...

Embodiment 2

[0040] Considering that Hf element does not interact with water, dilute acid or strong alkali, and does not directly combine with oxygen, nitrogen and other gases at room temperature, and Hf as a metal element has good electrical conductivity and other characteristics, Hf powder with a certain particle size range is directly Mixed with metal plating solution (nickel plating solution, platinum plating solution, etc.) The metal Hf particles become part of the cathode together with the sample; with the continuous thickening of the coating, the electroplating deposition of the composite coating modified by rare metal Hf can be realized.

[0041] The concrete implementation process of above-mentioned composite electroplating is:

[0042] 1) The particle size range of the Hf powder used is 0.1-10 μm. The commercially available Hf powder (<500 mesh) can be ground with a planetary ball mill and dispersed with deionized water until the Hf powder particles in the above particle size ran...

Embodiment 3

[0047] The invention provides a method for introducing rare metal Hf elements in the coating, characterized in that: the method for introducing rare metal Hf elements in the coating comprises the following steps:

[0048] 1) Surface treatment method: grind the sample, grind off the original surface of the metal, then perform sandblasting treatment, and then perform two-step degreasing treatment: the first step is ultrasonic cleaning with acetone for 15-30min, and the second step is at 40 -Boil in 60g / L NaOH solution for 10min;

[0049] 2) Configuration of the suspension plating solution: add pure Hf particles with a particle size of 0.1-10 μm in the conventional metal plating solution, and use a magnetic stirrer to stir the mixed solution until a uniform suspension is formed; adjust the pH value of the solution, Keep it in the pH range of ordinary electroplating metal coating;

[0050] For example, when Ni-Hf composite electroplating is carried out with a Watt-type plating so...

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Abstract

The invention relates to a method for introducing a rare metal Hf element into a coating. The method comprises: surface treatment, wherein a metal sample is burnished, a sand spraying treatment is performed after the original surface of the metal is grinded out, and a two-step oil removing treatment is performed; Hf particle suspended plating liquid preparation; electroplating condition setting, wherein the Hf element is introduced into the coating by using a composite electroplating method; electroplating liquid maintenance, wherein the characteristics of the plating liquid is basically unchanged by using the regular plating liquid maintenance way; diffusion annealing, wherein the composite plating layer obtained after the electroplating is annealed in a vacuum annealing furnace, the air pressure of the vacuum annealing furnace is less than 1*10<-2> Pa, and the heating rate is less than 10 DEG C / min; and coating preparation, wherein aluminizing is performed by using embedding, slurry and CVD chemical vapor phase method to obtain the high temperature protection aluminide coating. The method of the present invention has advantages of simple preparation process, high controllability, low cost, uniform Hf element distribution, wide plating layer application range, and strong universality.

Description

technical field [0001] The present invention relates to composite electroplating technology, specifically doping rare metal Hf particles during electroplating, so that the metal Hf particles are compounded into the coating, and used to prepare Hf-modified high-temperature protective aluminide coatings, and particularly relates to a coating The method of introducing rare metal Hf element into the layer. 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...

Claims

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Application Information

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IPC IPC(8): C25D3/56C25D15/00C25D5/50C25D5/18C25D5/34
Inventor 鲍泽斌阳颖飞蒋成洋朱圣龙王福会
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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