Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of wear-resistant and oxidation-resistant high-entropy alloy coating and preparation method thereof

A technology of alloy coating and oxidation high entropy, which is applied in the direction of metal material coating process and coating, can solve the problems of high preparation cost, easy cracks at the interface, high alloy content, etc., to ensure service life, guarantee engineering application, The effect of improving production efficiency

Active Publication Date: 2022-01-04
UNIV OF SCI & TECH BEIJING
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] High-entropy alloy is a multi-principal alloy, which is an alloy formed by four or more equal or approximately equal amounts of metals. Because of its special alloy composition, its high-temperature performance is far superior to that of traditional alloys, but due to its The high alloy content leads to high preparation costs and it is difficult to apply in large areas. The application of coating preparation can greatly save its cost
However, the face-centered cubic high-entropy alloy mainly composed of FeCoCrNi has low high-temperature strength, and its wear resistance often cannot meet the requirements of working conditions. It is necessary to introduce strengthening phases to improve its wear resistance.
By adding hard ceramic powder particles (such as WC, Al 2 o 3 、Si 3 N 4 ) is added to the high-entropy alloy coating as a strengthening phase to improve the high-temperature wear resistance of the coating is a common method, but due to the large difference in physical properties between ceramic powder and metal materials, the interface is likely to become the source of crack initiation , causing the coating to crack and fail

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
  • A kind of wear-resistant and oxidation-resistant high-entropy alloy coating and preparation method thereof
  • A kind of wear-resistant and oxidation-resistant high-entropy alloy coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 13% Fe powder, 17% Co powder, 23% Cr powder, 18% Ni powder, 14% Nb powder, 4% FeSi75-A powder (containing Si 74-80%), 10% FeCr55C10 powder (containing Cr 60-65%, containing C10%, Fe balance) and 1% CeO 2 Put the powder into a ball mill with a size of 75 μm, a ball-to-material ratio of 5:1, and a rotation speed of 80 r / min, and mix uniformly for 10 hours. Mix the mixed powder with shellac alcohol solution to make a paste, and apply it on the surface of H13 steel. Using a multi-mode fiber laser, the beam diameter is 3mm, the laser power is 1200W, the scanning speed is 400mm / min, and the overlap rate 40%, cladding is carried out, and the hardness of the obtained coating is about 890HV. The coating was oxidized in air at 700°C for 100 hours, and the weight gain was only 0.07%.

Embodiment 2

[0034] The high-entropy alloy powder was prepared by atomization forming method, and the chemical quality of the coating composition was 17% Fe, 18% Co, 30% Cr, 17% Ni, 14% Nb, 3% Si and 1% c. Then add 1% CeO to the high entropy alloy powder 2 The powder is loaded into a dual-motion powder mixer at a speed of 30r / min, and mixed uniformly for 20 hours. Put the mixed powder into the powder feeding gas, the powder feeding gas is N 2 , using a multi-mode fiber laser, the powder feeding rate is 10g / min, the beam diameter is 3mm, the laser power is 2000W, the scanning speed is 300mm / min, the overlap rate is 40%, and the coating hardness is 920HV. about. The coating at 700°C N 2 , CO 2 with H 2 Oxygenated in a mixed gas for 100 hours, the weight gain is only 0.09%.

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
thicknessaaaaaaaaaa
particle diameteraaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention provides a wear-resistant and anti-oxidation high-entropy alloy coating and a preparation method thereof. The coating alloy composition mass percent is: 15-21% Fe, 15-21% Co, 26-35% Cr, 15-21% 21% Ni, 11-18% Nb, 1-6% Si, 0.1-1.2% C, 1-2% CeO 2 , the coating is prepared by pre-set powder method and coaxial powder feeding method. The preset powder method is to weigh Co, Cr, Fe, FeNb, FeSi powder, FeCrC powder, and CeO2 powder according to the target coating composition, mix them uniformly, and then dry them at 80-150°C for 1-4 hours. Spread on the surface of the substrate with a thickness of 0.6-1.3mm, and then use laser to clad the powder on the surface of the substrate to form a wear-resistant and anti-oxidation high-entropy alloy coating. The coaxial powder feeding method is based on the Co, Cr, Fe, Nb, Si, C content in the coating to prepare alloy powder by smelting gas atomization method, and CeO 2 After the powder is uniformly mixed, it is dried at 80-150°C for 1-4 hours. The dried powder is put into the powder feeding cylinder, and the powder is fed under nitrogen protection. The powder is clad on the surface of the substrate by laser to form a wear-resistant and anti-oxidation high-entropy alloy coating.

Description

technical field [0001] The invention belongs to the field of coating preparation, and relates to a wear-resistant and anti-oxidation high-entropy alloy coating and a preparation method thereof, which are suitable for material surface protection and component repair. Background technique [0002] In the aviation industry, energy power industry, and metallurgical processes, more and more parts fail due to high-temperature environments (such as high-temperature wear, high-temperature oxidation, etc.), and materials with beneficial high-temperature properties can effectively improve the service life of these parts. Coating a layer of high temperature resistant coating on the surface of the material is an important means to improve the performance of parts. It can not only meet the high-temperature performance requirements of parts in industrial production, but also reduce the cost of industrial production and repair costs. [0003] High-entropy alloy is a multi-principal alloy,...

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 Patents(China)
IPC IPC(8): C23C24/10C22C30/00
CPCC23C24/103C22C30/00
Inventor 连勇张津马旻昱
Owner UNIV OF SCI & TECH BEIJING
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com