High-temperature alloy surface nanometer composite coating and preparation method thereof

A nano-composite coating and high-temperature alloy technology, which is applied in metal material coating technology, coating, fusion spraying, etc., can solve the problems of poor bonding, low coating toughness, pesting phenomenon, etc., and achieve simple process and environmental protection The effect of less pollution and excellent high temperature oxidation resistance

Inactive Publication Date: 2012-12-19
SOUTH CHINA UNIV OF TECH
View PDF9 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention is aimed at pure MoSi 2 The coating has problems such as low toughness, poor bonding with the substrate, and prone to "pesting" phenomenon during low-temperature oxidation. A nano-MoSi coating on the surface of a superallo

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
  • High-temperature alloy surface nanometer composite coating and preparation method thereof
  • High-temperature alloy surface nanometer composite coating and preparation method thereof
  • High-temperature alloy surface nanometer composite coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0042] Example 1

[0043] (1) Preparation and cleaning of the substrate: select GH4169 nickel-based alloy as the substrate material, cut the substrate wire into square flakes, use acetone and deionized water to ultrasonically clean the substrate for 15 minutes, and then wipe the substrate with filter paper. The surface of the wood, air-dried for later use;

[0044] (2) Sandblasting: use corundum sand with a grain size of 500~700μm to roughen the surface of the substrate treated in step (1), with a sandblasting pressure of 0.20MPa, a sandblasting angle of about 70°, and sandblasting The time is 20s;

[0045] (3) Pre-heat treatment: use a plasma jet to preheat the substrate treated in step (2) to 150°C;

[0046] (4) Plasma spraying: Nano MoSi successfully prepared in the previous period 2 -CoNiCrAlY composite structure particle feed is spraying powder. Plasma spraying is performed on the substrate after step (3). The spraying parameters are: spraying power 30kw, spraying voltage 30V, s...

Example Embodiment

[0052] Example 2

[0053] The difference between this embodiment and embodiment 1 is that the spraying distance in step (4) is 100 mm, and the powder feeding amount is 5 g / min.

Example Embodiment

[0054] Example 3

[0055] The difference between this embodiment and embodiment 1 is that the spraying distance in step (4) is 100 mm, and the powder feeding amount is 10 g / min.

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

PropertyMeasurementUnit
Granularityaaaaaaaaaa
Thicknessaaaaaaaaaa
Fracture toughnessaaaaaaaaaa
Login to view more

Abstract

The invention discloses a high-temperature alloy surface nanometer composite coating and a preparation method of the high-temperature alloy surface nanometer composite coating. The high-temperature alloy surface nanometer composite coating specifically comprises the following steps of: (1) ultrasonically washing an alloy substrate through acetone and deionized water in sequence; wiping the substrate through a filtering paper after the washing, and drying in the air for stand-by use; (2) carrying out sand blasting on the substrate processed in step (1) through emery; (3) preheating the substrate processed in step (2) through plasma bright eruption; (4) coating the substrate processed in step (3) through a plasma coating method, wherein the powder for coating is the nanometer MoSi2-CoNiCrAlY composite structure particle feedstock obtained by high-energy ball milling and sieving; and (5) naturally cooling the coated sample. With adoption of the method, the surface of a base body can be directly coated, and the prepared coating can effectively solve the problems that the pure MoSi2 coating has the defects of low toughness, poor combining performance to the base body, and easily-occured low-temperature 'pesting' phenomenon.

Description

technical field [0001] The invention belongs to the field of metal-based ceramic composite materials, in particular to a nanometer MoSi on the surface of a superalloy 2 - Preparation method of CoNiCrAlY composite coating. Background technique [0002] Superalloys refer to a class of metal materials based on iron, cobalt, and nickel, and can work for a long time at high temperatures above 600°C and under certain stresses. They are mainly used in aerospace, aviation, petroleum, chemical industry, ships, etc. field. However, due to the limitations of its own properties, the working temperature of superalloys has been difficult to meet the rapid development of today's scientific and technological progress. For example, when the temperature exceeds 1000 ° C, the high-temperature oxidation resistance of nickel-based alloys will be significantly reduced, resulting in its high-temperature mechanical properties. decline. Therefore, the method of applying a protective coating on th...

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): C23C4/06C23C4/073C23C4/134
Inventor 钟喜春刘名涛曾德长刘仲武邱万奇余红雅李尚周
Owner SOUTH CHINA UNIV OF TECH
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