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

A preparation method for forming a wear-resistant coating on the inner wall of an aluminum alloy cylinder

A technology of wear-resistant coating and aluminum alloy, which is applied in the direction of metal material coating technology, coating, metal processing equipment, etc., can solve the problems of poor wettability, unbalanced reaction product ratio, etc., and achieve improved coating density The effect of improving the performance and bonding strength, improving the spreading wettability, and increasing the exothermic energy of the reaction

Active Publication Date: 2020-06-30
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] High-temperature self-propagating technology can be used to prepare wear-resistant coatings for cylindrical parts with different inner diameters, but the limitation is that the system temperature is too high, Al and Fe 2 o 3 It is the basic component of high-temperature self-propagating synthetic coatings, and the Fe and Al formed by the reaction of the two 2 o 3 The wettability is not good, and the maximum adiabatic temperature of the reaction can reach 3509K, which is not only higher than that of aluminum alloy oxide or Al 2 o 3 The melting point of Al (2313K) is much higher than the boiling point of Al (2723K). During the reaction, Al will evaporate in large quantities, which will not only form a large number of pores in the coating, but also cause an imbalance in the ratio of reaction products.

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 preparation method for forming a wear-resistant coating on the inner wall of an aluminum alloy cylinder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Step 1, firstly mix the graphene powder and Al powder evenly, the graphene has a sheet structure, the mass percentage of graphene and Al is 0.1:99.9; the sheet thickness is 1nm;

[0032] After adding Fe 2 o 3 powder, ZnO powder, SiO 2 powder, B 2 o 3 Mix the powder and Cu-Ti alloy powder evenly to obtain a mixed powder, wherein the mass percentage of Cu and Ti is 96:4;

[0033] The mass percentage of each component in the mixed powder is 12 graphene and Al: 62 Fe 2 o 3 : 7 ZnO : 1 SiO 2 : 1 B 2 o 3 : 17 Cu-Ti;

[0034] Step 2. Mix the above-mentioned mixed powder and polyvinyl alcohol liquid evenly and heat it at a heating temperature of 82-85°C, and then carry out spray granulation to obtain a low-temperature self-propagating composite material;

[0035] Step 3, stirring and mixing the low-temperature self-propagating composite material and water glass to obtain a slurry;

[0036] Step 4. Inject the slurry into the cylindrical inner cavity of the aluminum al...

Embodiment 2

[0047] On the basis of the foregoing embodiments, the steps of this embodiment are:

[0048] Step 1, first mix the graphene powder and the Al powder evenly, the graphene has a sheet structure, the mass percentage of graphene and Al is 0.2:99.8; the sheet thickness is 2nm;

[0049] After adding Fe 2 o 3 powder, ZnO powder, SiO 2 powder, B 2 o 3 Mix the powder and Cu-Ti alloy powder evenly to obtain a mixed powder, wherein the mass percentage of Cu and Ti is 95:5;

[0050] The mass percent of each component in the mixed powder is 14 graphene and Al: 63 Fe 2 o 3 : 8 ZnO : 2 SiO 2 : 2 of B 2 o 3 : 11 Cu-Ti;

[0051] Step 2. Mix the above-mentioned mixed powder and polyvinyl alcohol liquid evenly and heat it at a heating temperature of 83° C., and then carry out spray granulation to obtain a low-temperature self-propagating composite material;

[0052] Step 3, stirring and mixing the low-temperature self-propagating composite material and water glass to obtain a slurry; ...

Embodiment 3

[0064] On the basis of the foregoing embodiments, the steps of this embodiment are:

[0065] Step 1. First mix the graphene powder and the Al powder evenly, the graphene has a sheet structure, and the mass percentage of graphene and Al is 0.3:99.7; the sheet thickness is 3nm;

[0066] After adding Fe 2 o 3 powder, ZnO powder, SiO 2 powder, B 2 o 3 Mix the powder and Cu-Ti alloy powder evenly to obtain a mixed powder, wherein the mass percentage of Cu and Ti is 92:8;

[0067] The mass percent of each component in the mixed powder is 15 graphene and Al: 64 Fe 2 o 3 : 8 ZnO : 2 SiO 2 : 2 of B 2 o 3 : 9 Cu-Ti;

[0068] Step 2. Mix the above-mentioned mixed powder and polyvinyl alcohol liquid evenly and heat it at 84°C, and then carry out spray granulation to obtain a low-temperature self-propagating composite material;

[0069] Step 3, stirring and mixing the low-temperature self-propagating composite material and water glass to obtain a slurry;

[0070] Step 4. Inject...

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
particle sizeaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention relates to a preparation method for forming a wear-resistant coating on the inner wall surface of an aluminum alloy cylinder, comprising the following steps: first uniformly mixing graphene powder, Al powder, etc. to obtain a mixed powder; mixing the above mixed powder with polyvinyl alcohol liquid Mix evenly and heat, and then spray granulate to obtain low-temperature self-propagating composite material; stir and mix low-temperature self-propagating composite material and water glass to obtain slurry; inject the slurry into the cylindrical inner cavity of the aluminum alloy workpiece, And the aluminum alloy workpiece is installed on the horizontal turntable to rotate, and the aluminum alloy workpiece is heated during the rotation process, so that the slurry is uniformly solidified on the inner wall surface of the cylindrical inner cavity; after the slurry is uniformly solidified, keep the rotating At the same time, the cured slurry is melted with an oxyacetylene flame, so that the cured slurry reacts to form a coating. The reaction process temperature of the invention is lower, and the compactness and bonding strength of the coating are improved.

Description

technical field [0001] The invention belongs to the technical field of preparing a graphene self-lubricating wear-resistant coating by a low-temperature self-propagating process, and in particular relates to a preparation method for forming a wear-resistant coating on an aluminum alloy cylindrical inner wall. Background technique [0002] Aluminum alloy has the advantages of low density, high strength, and good formability, and is widely used in the manufacture of various cylindrical parts. However, its low hardness and poor wear resistance and poor corrosion resistance limit its application. Through different surface modification methods, these shortcomings of aluminum alloys can be improved. At present, the surface treatment methods of modified aluminum alloys at home and abroad mainly include: electroplating, anodizing, thermal spraying, laser cladding, micro-arc oxidation and other methods. Among them, electroplating, anodization, and micro-arc oxidation are more suita...

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): C22C29/12C23C24/10B22F1/00B22F1/052B22F1/10B22F1/102
CPCC22C29/12C23C24/103B22F1/052B22F1/10B22F1/102C09D129/04C08K3/042C08K3/22C08K2003/0812C08K2003/085C08K3/34C08K2201/005C09D131/04C22C9/00C23C30/00C09D1/02C09D5/00B22F1/12B22F1/107C22C26/00C08K3/01C08K3/00
Inventor 田浩亮于洋王长亮郭孟秋汤智慧高俊国崔永静周子民王天颖张昂
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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