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

Elementary powder sintered iron-copper-based oil-containing anti-friction material and preparation method thereof

A friction-reducing material, iron-copper-based technology, used in the petroleum industry, additives, lubricating compositions, etc., can solve the problems of poor pressing performance, large market demand, unsatisfactory wear resistance, etc. Good grindability, excellent mechanical properties and uniform microstructure

Active Publication Date: 2014-01-22
SOUTHEAST UNIV
View PDF4 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The raw material powders of iron-copper-based oil-containing antifriction materials are mainly some pre-alloyed powders, such as iron-copper low-temperature diffusion powder, copper-clad iron chemical reaction powder, iron and bronze (90C u 10Sn) mixed powder, etc. The advantages of oil-containing anti-friction materials using pre-alloyed powder as raw materials are high sintered body strength, no segregation, and stable performance, but the price of pre-alloyed powder is relatively expensive, the compression performance is relatively poor, and the composition adjustment is not as good as Simple powder is flexible
However, for the iron-copper-based oil-containing antifriction material prepared by simple iron-copper powder, since the density of iron and copper is quite different, and the microscopic morphology of the powder particles is also different, segregation and stratification are often easy to occur when mixing. problem, which affects the stability of product quality, especially when the content of iron and copper is relatively close, the problem of segregation becomes more and more serious
In order to overcome the segregation phenomenon caused by the difference in density between iron and copper, people have prepared copper-tin diffusion powder with a bulk density close to that of iron powder, but the segregation phenomenon still exists when the powder price increases, and some people use low-temperature diffusion to prepare Low-temperature diffusion powder of iron and copper or chemical replacement method are used to prepare copper-clad iron powder. These pre-alloyed powders solve the problem of powder mixing and segregation, but the cost is still high and the wear resistance is not ideal.
On the other hand, there is the problem of strength. Compared with the pre-alloyed powder, the mixed powder of single substance lacks the pre-diffusion of atoms, and the "occlusion" between the particles is not enough. Therefore, the mechanical properties of the oil-containing anti-friction material are not ideal, which affects the service life.
Therefore, due to the above two problems, the application of some high-performance iron-copper-based oil-containing anti-friction materials with relatively high copper content is limited, and the market demand for such oil-containing anti-friction materials with both structural and bearing properties is very large

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
  • Elementary powder sintered iron-copper-based oil-containing anti-friction material and preparation method thereof
  • Elementary powder sintered iron-copper-based oil-containing anti-friction material and preparation method thereof
  • Elementary powder sintered iron-copper-based oil-containing anti-friction material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] An iron-copper-based oil-containing antifriction material sintered with simple powder, characterized in that the following three powders form the matrix and the three powders and their proportions (by mass percentage) are as follows:

[0034] Less than 100 mesh reduced iron powder 67%~71%,

[0035] Mixed copper powder less than 120 mesh 28.4% ~ 32.4%,

[0036] 0.6% tin powder less than 325 mesh;

[0037] The iron-copper-based oil-containing antifriction material is a material that includes a base material and zinc stearate accounting for 0.7% of the total mass of the base as a raw material and is processed as follows. The specific proportions of the three powders in the base can be Options: 67%, 71% or 68% of reduced iron powder less than 100 mesh, 28.4%, 29% or 32.4% of mixed copper powder less than 120 mesh, 0.6% of tin powder less than 325 mesh,

[0038] The process of the processing is as follows:

[0039] A. Mixing: Mix the powder in a V-type mixer according to ...

Embodiment 2

[0046] A method for manufacturing an iron-copper-based oil-containing antifriction material sintered with simple powder, the specific steps are as follows:

[0047] Step A Mixing: Mix the reduced iron powder, mixed copper powder, zinc stearate and tin powder in a V-type mixer according to the stated ratio, and the mixing time is 1 hour;

[0048] Step B: Pressing: put the uniformly mixed powder in a mold, press and form it under a pressure of 300-600MPa to obtain a compact, and the compact has a molding density of 6.2-6.3g / cm 3 ;

[0049] Step C sintering: the compact is placed in a mesh belt sintering furnace for sintering, and the sintering atmosphere is N 2 and H 2 During the sintering process, the compact first passes through the preheating zone at 500-600°C for 1-2 hours, then enters the sintering zone at 950-1050°C, keeps it warm for 1.5-2.5 hours, and finally cools in the cooling zone 1-1.5h to room temperature to obtain a sintered body;

[0050] Step D shaping: pres...

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
densityaaaaaaaaaa
densityaaaaaaaaaa
bulk densityaaaaaaaaaa
Login to View More

Abstract

The invention relates to an elementary powder sintered iron-copper-based oil-containing anti-friction material and a manufacturing method thereof. The anti-friction material is composed of the following raw materials in percentage by mass: 67%-71% of Fe, 28.4%-32.4% of Cu, 0.6% of Sn, and 0.7% of zinc stearate; the oil percentage in volume of the material is 17%-22%. The oil-containing anti-friction material adopts elementary iron and copper mixed powder, wherein iron powder is reduced iron powder, copper powder is mixed powder of electrolytic copper powder and atomized copper powder. The iron powder and the copper powder of the elementary iron and copper mixed powder are mixed uniformly, and thus the phenomenon of segregation due to different densities of iron powder and copper powder is avoided. The uniformly mixed powder is subjected to process operations of pressing, sintering, finishing, oil impregnation and the like to obtain the powder metallurgy iron-copper-based oil-containing anti-friction material with excellent properties. The oil-containing anti-friction material has the advantages that the raw materials adopt elementary mixed powder and are low in price; after sintering, the material is uniform in microstructure, free of segregation, and stable in property; the copper content is high, and the wear resistance is good; the material contains no lead, and meets environmental requirements; when the sintering temperature is 1040 DEG C, the wear resistance of the material even exceeds that of an iron-copper-based oil-containing anti-friction material prepared from pre-alloy powder.

Description

technical field [0001] The invention is a high-performance powder metallurgy iron-copper-based oil-containing anti-friction material sintered by simple powder. This anti-friction material can be applied to the fields of automobiles, motorcycles, electric tools, household appliances, etc. An iron-copper-based oil-containing antifriction material and a preparation method thereof. Background technique [0002] Powder metallurgy iron-copper-based oil-containing anti-friction materials combine the advantages of copper-based and iron-based oil-containing anti-friction materials, and have the characteristics of good mechanical properties, low noise, and high wear resistance. Much attention. The raw material powders of iron-copper-based oil-containing antifriction materials are mainly some pre-alloyed powders, such as iron-copper low-temperature diffusion powder, copper-clad iron chemical reaction powder, iron and bronze (90C u 10Sn) mixed powder, etc. The advantages of oil-contai...

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 Applications(China)
IPC IPC(8): C22C38/16B22F3/16C10M125/04C10N30/06
Inventor 潘冶秦清华申承秀王春官
Owner SOUTHEAST 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