Method for aluminizing and chromizing surface of nickel-based high-temperature alloy used on turbine blade or guider

A nickel-based high-temperature alloy and turbine blade technology, applied in metal material coating process, coating, solid-state diffusion coating, etc., can solve the problems of limited corrosion resistance of aluminized coating, unable to guarantee supply, etc., and achieve superior performance , good thermal corrosion resistance effect

Inactive Publication Date: 2021-04-23
CENT SOUTH UNIV
View PDF5 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, aero-engine blades are mainly improved by aluminizing treatment to improve high-temperature resistance, but the improvement of corrosion resistance of aluminized coatings is limited; aluminum-chromium co-infiltration improves high-temperature corrosion resistance and high-temperature oxidation resistance at the same time However, at present, the procurement of aluminum-chromium co-infiltration agent mainly depends on imports, and its continuous and stable supply cannot be guaranteed. Therefore, it is very necessary to develop domestic aluminum-chromium co-infiltration agent and its coating preparation method

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for aluminizing and chromizing surface of nickel-based high-temperature alloy used on turbine blade or guider
  • Method for aluminizing and chromizing surface of nickel-based high-temperature alloy used on turbine blade or guider
  • Method for aluminizing and chromizing surface of nickel-based high-temperature alloy used on turbine blade or guider

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022]The aluminum chrome method of this embodiment is carried out as follows:

[0023]1, the infiltration configuration, with a mass ratio, the raw material powder, the alumina powder content of 50%, the chrome powder content of 39%, the aluminum powder content of 10%, 1% ammonium chloride; and use a drum type The ball mill grinds the powder ball for 9.5 h to give a mixed bleeding.

[0024]2, pretreatment of bleging agent: calcine the ball after milling, the calcination temperature is controlled at 1100 ° C, and the holding time is controlled at 15.5 h, after the calcination is completed, the chamber is cooled. Then, in the baked bure agent, add a relative raw material total amount of aluminum powder, 1% chromium powder and 0.4% NH.4CL; then bleed at 1030 ° C for 11 h, after the air was burned, the furnace was cooled to give a sample.

[0025]3, parts pretreatment: Totally blow up the part with 200 目 砂, pressure 0.28MPa, after blowing, the blower cleans the surface residual sand, obtains th...

Embodiment 2

[0036]1, the infiltration configuration, with a mass ratio, the raw material powder, the alumina powder content of 50%, the chrome powder content of 44%, the aluminum powder content of 5%, 1% ammonium chloride content; and use roller type The ball mill grinds the powder ball for 9.5 h to give a mixed bleeding.

[0037]2, pretreatment of bleging agent: calcine the ball after milling, the calcination temperature is controlled at 1100 ° C, and the holding time is controlled at 15.5 h, after the calcination is completed, the chamber is cooled. Then, in the baked bure agent, add a relative raw material total amount of aluminum powder, 1% chromium powder and 0.4% NH.4CL; then bleed at 1030 ° C for 11 h, after the air was burned, the furnace was cooled to give a sample.

[0038]3, parts pretreatment: Totally blow up the part with 200 目 砂, pressure 0.28MPa, after blowing, the blower cleans the surface residual sand, obtains the pretreatment parts, the parts in this example are nickel groups. High...

experiment example 2

[0048]The results of the corrosion resistance test of the experimental example 2 and the contraction example 2 are shown in Table 2.

[0049]Table 2

[0050] Example 2 Contrast 2 Corrosion potential -1.32-1.89

[0051]From the experimental results, the corrosion resistance performance of Experimental Example 2 is superior to Comparative Example 2. Further, the diffusion of the permeability layer of the contraction is uneven, and some are crackled.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a method for aluminizing and chromizing the surface of a nickel-based high-temperature alloy used on a turbine blade or a guider. The method comprises the following steps: 1) preparing an aluminizing and chromizing agent; 2) pretreating the agent; 3) pretreating a part; 4) carrying out aluminizing and chromizing; and 5) post-treating the part containing an aluminum-chromium coating. The method mainly aims at the situation that in an environment with hot corrosion as a main damage form, chromium element can quickly generate a stable chromate layer, so that a single chromized layer and an aluminized and chromized layer have better hot corrosion resistance than a single aluminized layer. The oxidation resistance and the hot corrosion resistance are considered, and the aluminized and chromized layer has the optimal comprehensive corrosion resistance. According to the invention, a special formula and a unique atmosphere protection method are adopted, and the part is subjected to sufficient pretreatment and post-treatment, so that the obtained infiltrated layer has more excellent performance than an infiltrated layer manufactured by an existing method.

Description

Technical field[0001]The present invention belongs to the technical field of surface treatment of metal materials, and more particularly to a method of surface aluminum chromium having a nickel-based high-temperature alloy for a turbine blade or a guide.Background technique[0002]The metal permeation process is a chemical heat treatment process in which a plurality of metal atoms penetrates into the surface layer of the metal object, placing the metal object into a joy of the elementally penetrating, heats the medium to a certain temperature, in the infiltration The atoms of the elements that need to be penetrated will diffuse into the metal object substrate.[0003]Aluminum chromium alloy is mainly used for aerospace engine blades. Since the temperature at which the air engine gas turbine gas inlet can reach 1600 °, and the operating temperature of the air engine blade can reach more than 1200 °, the aeroengi needs to operate in an extremely harsh environment. Therefore, it is necessa...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C23C10/56
CPCC23C10/56
Inventor 袁铁锤唐皓州李瑞迪
Owner CENT SOUTH UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap