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

A kind of nickel base self-lubricating composite material and preparation method thereof

A composite material and self-lubricating technology, which is applied in the field of high-strength nickel-based self-lubricating composite materials and its preparation, can solve the problems of composite material porosity affecting mechanical properties, easy agglomeration, poor wettability, etc., and achieve improved activation and sintering effect , Improve the effect of poor wettability and good wear resistance

Inactive Publication Date: 2019-09-10
CENT SOUTH UNIV +1
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the special crystal structure of hexagonal boron nitride, it is easy to agglomerate during sintering, and its wettability with the metal matrix is ​​poor, which makes the porosity of the composite material seriously affect the mechanical properties.

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 nickel base self-lubricating composite material and preparation method thereof
  • A kind of nickel base self-lubricating composite material and preparation method thereof
  • A kind of nickel base self-lubricating composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0034] A preparation method of a nickel-based self-lubricating composite material, comprising the steps of:

[0035] 1) According to the composition of the nickel-based self-lubricating composite material, the raw materials are weighed, wherein the composition of the nickel-based self-lubricating composite material is as described above;

[0036] 2) mixing hexagonal boron nitride and chromium carbide powder, adding modifier, and performing wet ball milling to obtain mixture A;

[0037] 3) The mixture A is heated and roasted under the isolation of oxygen to obtain the modified material B;

[0038] 4) Mix the nickel-based alloy powder with the modified material B, and wet ball mill until uniform, to obtain the mixed material C;

[0039] 5) Press the mixture C into a green body, heat up and sinter under the isolation of oxygen to obtain a sintered body;

[0040] 6) Repress the sintered billet, heat up and refire under the isolation of oxygen, and obtain a nickel-based self-lubr...

Embodiment 1

[0050] A nickel-based self-lubricating composite material, the proportion of which is: V (nickel-based alloy): V (hexagonal boron nitride): V (chromium carbide) = 74:14:12, wherein the mass ratio of nickel-based alloy element powder :W(Ni):W(Cu):W(Fe):W(Mn)=80:8:8:4.

[0051] The preparation method is as follows:

[0052] 1) The hexagonal boron nitride and chromium carbide powders are subjected to wet ball milling on a biaxial rolling machine, wherein the amounts of water and polyacrylamide added are respectively 26% and 1.5% of the total mass of hexagonal boron nitride and chromium carbide, The ball-to-material ratio is 6:1, the ball mill is 42h, and the rotation speed is 80-100rpm, and the mixture A is obtained;

[0053] 2) Put the mixture A into a graphite boat and roast it in a hydrogen atmosphere. The roasting process is as follows: a. Room temperature - 1100°C for 4 hours; b. Heat preservation at 1100°C for 1 hour; c. Cool in the furnace to obtain Modified material B;

...

Embodiment 2

[0059] A high-strength nickel-based self-lubricating composite material, the proportion of which is: V (nickel-based alloy): V (hexagonal boron nitride): V (chromium carbide) = 84:10:6, wherein the nickel-based alloy element powder Mass ratio: W(Ni):W(Cu):W(Fe):W(Mn)=78:6:7:9.

[0060] The preparation method is as follows:

[0061] 1) The hexagonal boron nitride and chromium carbide powders are subjected to wet ball milling on a biaxial rolling machine, wherein the amounts of water and polyacrylamide added are respectively 26% and 1.5% of the total mass of hexagonal boron nitride and chromium carbide, The ball-to-material ratio is 6:1, the ball mill is 42h, and the rotation speed is 80-100rpm, and the mixture A is obtained;

[0062] 2) Put the mixture A into a graphite boat and roast it in a hydrogen atmosphere. The roasting process is as follows: a. Room temperature - 1100°C for 4 hours; b. Heat preservation at 1100°C for 1 hour; c. Cool in the furnace to obtain Modified ma...

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
compressive strengthaaaaaaaaaa
hardnessaaaaaaaaaa
friction coefficientaaaaaaaaaa
Login to View More

Abstract

The invention discloses nickel-based self-lubricating composite and a preparation method thereof. The nickel-based self-lubricating composite is composed of nickel-based alloy, hexagonal boron nitride, and chromium carbide. The nickel-based self-lubricating composite has high strength; a sample for compressive strength test has a size of 39 mm*11 mm*6 mm, indoor temperature compressive strength ofgreater than 350 MPa, surface hardness of 2.5-3 GPa, impact toughness of greater than 7 J / cm<2>, friction coefficient of 0.25-0.5, and friction rate of less than 5*10<-4> / min.

Description

technical field [0001] The invention relates to a composite material and a preparation method thereof, in particular to a high-strength nickel-based self-lubricating composite material and a preparation method thereof. Background technique [0002] With the continuous development of vehicle power transmission and crawler walking technology in our country, the requirements for the braking system of tracked vehicles are getting higher and higher, which also puts forward higher requirements for the pin pressurization mechanism as the loading mechanism of the braking system. High-capacity dry-disc mechanical brakes are usually used in harsh environments such as high temperature, high speed, and high load. The poor contact state of the supporting mating surface or impurities entering the gap between the mating surfaces will cause the movement of the marble disc to be stuck, and in severe cases, the brake will fail. In humid or salt spray areas, if the supporting surface of the pr...

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): C22C19/03C22C32/00C22C1/05
Inventor 王斌徐骄彭福华彭初明
Owner CENT SOUTH UNIV
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