Method for preparing protective coating suitable for blade with high Mo content and complex inner cavity structure

A technology for protective coatings and blades, applied in coatings, metal material coating processes, solid-state diffusion coatings, etc., to achieve the effects of easy implementation, avoiding external diffusion, and simple operation

Inactive Publication Date: 2016-06-22
BEIHANG UNIV
View PDF4 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is also applicable to the preparat...

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 preparing protective coating suitable for blade with high Mo content and complex inner cavity structure
  • Method for preparing protective coating suitable for blade with high Mo content and complex inner cavity structure
  • Method for preparing protective coating suitable for blade with high Mo content and complex inner cavity structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0039] The present invention will be further described below in conjunction with accompanying drawing.

[0040] The invention provides a method for preparing a protective coating suitable for a blade with a complex inner cavity structure with high Mo content, including fluoride ion cleaning in the inner cavity of the blade and preparation of a gas-phase aluminized silicon coating. The specific steps are as follows:

[0041] Step 1: Put the leaves to be treated in a muffle tank after degreasing and cleaning, put 15-20g of polytetrafluoroethylene particles in a material box, and place the material box at the bottom of the aluminizing furnace;

[0042] Step 2: Vacuum the muffle tank below 1Pa and fill it with hydrogen to clean it several times;

[0043]Step 3: Ensure that the hydrogen gas is continuously fed into the muffle tank, heat the muffle tank from room temperature to 950-1000°C and keep it warm for 90min, with a heating rate of 10°C / min. During this period, the gas in th...

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 preparing a protective coating suitable for a blade with the high Mo content and a complex inner cavity structure and belongs to the technical field of high-temperature alloy coatings and preparation thereof. The preparation method comprises the steps of fluorinion cleaning of an inner cavity of the blade and preparation of a gas phase alumetizing silicon coating. The purpose of fluorinion cleaning of the inner cavity of the blade is to remove a residual oxide layer on the wall of the inner cavity so as to provide conditions for subsequent preparation of the gas phase alumetizing silicon coating. The surface layer of the gas phase alumetizing silicon coating is an aluminum-silicon coating. Discontinuous MoSi2 phases are formed below the aluminum-silicon coating through internal diffusion of silicon atoms and chemical combination of molybdenum elements in alloy. The formed MoSi2 layer consumes the molybdenum elements close to the surface layer, can also restrain continuous external diffusion of the molybdenum elements in the alloy and has the functions of a diffusion preventing layer. The situation that the molybdenum elements externally diffuse to the coating surface to form MoO3 gas phase oxides, so that the integrity of an oxide film is damaged is avoided; and accordingly the aluminum-silicon diffusion coating is especially suitable for high-temperature alloy components with the complex inner cavity structures and the high Mo content.

Description

technical field [0001] The invention belongs to the technical field of high-temperature alloy coating and its preparation, and relates to a method for preparing a high-temperature protective coating for high-temperature alloy parts of aero-engines and ground gas turbines. Specifically, it refers to a preparation method suitable for blade protective coating with high Mo content and complex inner cavity structure. Background technique [0002] Nickel-based single crystal superalloys have excellent high-temperature mechanical properties and are currently the main materials for manufacturing advanced aero-engines and gas turbine blades. The extremely harsh working environment of the engine requires the alloy not only to have good high-temperature mechanical properties, but also to have excellent high-temperature oxidation resistance and thermal corrosion resistance. However, in actual situations, it is difficult to satisfy multiple properties in the same alloy at the same time....

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
IPC IPC(8): C23C10/14C23C10/02
CPCC23C10/02C23C10/14
Inventor 彭徽郭洪波曹中原宫声凯徐惠彬
Owner BEIHANG 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