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Copper-based friction material suitable for carbon ceramic brake disc and preparation method thereof

A technology of carbon-ceramic brake discs and friction materials, applied in the field of friction materials, to achieve the effects of improving high-temperature strength and toughness, improving friction and wear performance, and good thermal conductivity

Active Publication Date: 2020-06-16
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although many people have carried out research work on copper-based friction materials, such as patent CN107326248A "a preparation method of high-speed rail brake powder metallurgy copper-based friction material", patent CN109468487A "a tungsten carbide reinforced copper-based powder metallurgy friction material and its preparation method", patent CN106011520A "a dry copper-based powder metallurgy friction material for clutches and its preparation method", patent CN101666364A "a copper-based powder metallurgy clutch friction body", patent CN105179537A "a copper-based friction material for a heavy-duty truck clutch Patent CN106702204A "Copper-based powder metallurgy friction material and its preparation method", patent CN1594621A "A copper-based powder metallurgy friction material", patent CN103639414A "Preparation method of copper-based friction material with high hardness and low wear" and patent CN108916277A "a preparation method of copper-based brake pad friction material", but these are all aimed at the use of copper-based friction materials with traditional cast iron and steel brake discs, and specifically for the use of carbon ceramic brake discs. However, there are few related reports on copper-based friction materials.

Method used

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  • Copper-based friction material suitable for carbon ceramic brake disc and preparation method thereof
  • Copper-based friction material suitable for carbon ceramic brake disc and preparation method thereof
  • Copper-based friction material suitable for carbon ceramic brake disc and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Step 1: the mass fraction is: copper powder 56%, iron powder 14%, molybdenum disulfide powder 3%, granular graphite powder 6%, flake graphite powder 4%, ferrochrome powder (chromium content is 55wt%) 3%, 3% of ferrosilicon powder, 4% of ferroboron powder, 4% of ferromanganese powder (manganese content is 75wt%), 3% of ferrosilicon powder raw material powder is prepared in proportion to the mixture, and the mixture is mixed in V-type mixer for 8h ;

[0034] Step 2: Pressing and molding the mixture to obtain a compact, and the unit pressing pressure is 500MPa;

[0035] Step 3: Put the green compact on the copper-plated steel back, place it in a bell-type pressurized sintering furnace for sintering, the sintering temperature is 960°C, the holding time is 3h, the sintering unit pressure is 2MPa, and the sintering atmosphere is pure hydrogen;

[0036] Step 4: After the heat preservation is over, remove the heating furnace body, add a cooling cover, and keep applying a unit ...

Embodiment 2

[0038] Step 1: the mass fraction is: copper powder 52%, iron powder 18%, molybdenum disulfide powder 3%, granular graphite powder 6%, flake graphite powder 4%, ferrochrome powder (chromium content is 55wt%) 2%, 3% of ferrosilicon powder, 6% of ferroboron powder, 5% of ferromanganese powder (manganese content is 65wt%), 1% of ferrosilicon powder raw material powder is prepared in proportion to the mixture, and the mixture is mixed in V-shaped mixer for 6h ;

[0039] Step 2: Pressing and molding the mixture to obtain a compact, the unit pressing pressure is 400MPa;

[0040] Step 3: Put the green compact on the copper-plated steel back, place it in a bell-type pressurized sintering furnace for sintering, the sintering temperature is 1020°C, the holding time is 2h, the sintering unit pressure is 2MPa, and the sintering atmosphere is hydrogen and nitrogen Mixed gas with a ratio of 3:1;

[0041] Step 4: After the heat preservation is over, remove the heating furnace body, add a co...

Embodiment 3

[0043] Step 1: the mass fraction is: copper powder 55%, iron powder 15%, molybdenum disulfide powder 2%, granular graphite powder 5%, flake graphite powder 5%, ferrochrome powder (chromium content is 65wt%) 4%, 4% of ferrosilicon powder, 3% of ferroboron powder, 4% of ferromanganese powder (manganese content is 65wt%), 3% of ferrosilicon powder raw material powder is prepared in proportion to the mixture, and the mixture is mixed in V-shaped mixer for 4h ;

[0044] Step 2: Pressing and molding the mixture to obtain a compact, and the unit pressing pressure is 500MPa;

[0045] Step 3: Put the green compact on the copper-plated steel back, place it in a bell-type pressurized sintering furnace for sintering, the sintering temperature is 980°C, the holding time is 3h, the sintering unit pressure is 3MPa, and the sintering atmosphere is hydrogen and nitrogen Mixed gas with a ratio of 3:1;

[0046] Step 4: After the heat preservation is over, remove the heating furnace body, add a...

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Abstract

The invention relates to a copper-based friction material suitable for a carbon ceramic brake disc and a preparation method thereof. The friction material comprises the following components in percentage by mass: 52-60% of copper powder, 12-20% of iron powder, 2-4% of molybdenum disulfide powder, 5-9% of granular graphite powder, 3-6% of flake graphite powder, 1-4% of ferrochrome powder, 1-4% of ferrosilicon powder, 2-6% of ferroboron powder, 4-8% of ferromanganese powder, and 1-3% of ferrovanadium powder. The copper-based friction material is prepared by proportioning, mixing, pressing and pressure sintering. The copper-based friction material adopts prealloyed powder comprising ferrochrome, ferrosilicon, ferromanganese, ferroboron and ferrovanadium as a friction component, the good heatconductivity, high hardness and high toughness of the prealloyed powder are fully utilized, the heat conductivity of the friction material is further improved, the comprehensive mechanical property ofthe friction material is improved, higher friction coefficient and good wear resistance are obtained when the friction material is matched with the carbon ceramic brake disc, and the excellent braking effect is ensured.

Description

technical field [0001] The invention relates to the field of friction materials, in particular to a copper-based friction material suitable for carbon ceramic brake discs and a preparation method thereof. Background technique [0002] Carbon-ceramic material is a ceramic matrix composite material made of carbon fiber reinforced silicon carbide. It is a new type of material with excellent friction and wear properties developed in recent years. It is currently being gradually promoted and used as a brake disc material. Compared with traditional metal brake discs such as cast iron and steel, carbon ceramic brake discs have a series of advantages such as low density, high temperature resistance, and long service life. The increasingly harsh high-energy high-speed braking conditions brought about by the increase of operating speed and carrying capacity have broad application prospects in high-speed trains, automobiles, aircraft and other fields. Copper-based friction material is...

Claims

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Application Information

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IPC IPC(8): C22C9/00C22C32/00C22C1/05C22C1/10
CPCC22C1/0425C22C1/05C22C9/00C22C32/0084
Inventor 刘如铁赵恒阳林雪杨汪琳陈洁熊翔廖宁
Owner CENT SOUTH UNIV
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