Copper-based powder metallurgy composite friction material for vehicle and preparation method thereof

A composite friction material and powder metallurgy technology, applied in the field of composite friction materials, can solve problems such as friction noise, automobile brake disc or drum scratches, and achieve stable friction coefficient, good anti-wear characteristics, and moderate elastic modulus.

Inactive Publication Date: 2018-07-10
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the strong rigidity and hardness of the copper-based powder metallurgy friction material, it is easy to cause scratches and friction noise on the brake disc or drum of the car.

Method used

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  • Copper-based powder metallurgy composite friction material for vehicle and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Preparation of short fine copper-based powder metallurgy friction material: basic material formula: in terms of mass percentage, the matrix material formula is 50% copper, 8% iron, 10% quartz powder, 15% aluminum oxide, and 2% molybdenum disulfide; 10% graphite powder; 5% boron nitride. The molding agent is kerosene, and the addition amount of the molding agent is 0.2% of the total weight of the base material. Mix the above materials evenly, pour them into the mold with a pressure of 400MPa, and press them into a slender rod shape with a diameter of φ2mmX and a length of 200mm. Separate each slender rod-shaped compact and put it into a sintering furnace. Lower the temperature to 1100°C, keep the temperature for 4 hours, and cool down to room temperature with the furnace.

[0030] Standing for more than 24 hours under dry conditions; then shearing, crushing, and screening with an 8-mesh sieve to obtain a copper-based powder metallurgy friction material.

[0031] Prepar...

Embodiment 2

[0037] Preparation of short and fine copper-based powder metallurgy friction material: basic material formula (by mass percentage): 60% copper, 5% iron, 5% quartz powder, 10% aluminum oxide, 3% molybdenum disulfide; calcium fluoride 7%, graphite powder 10%; forming agent is kerosene, based on the total weight of the mixture, the content of the forming agent is 0.5% total weight. Mix the above materials evenly, pour them into the mold with a pressure of 400MPa, and press them into a slender rod shape with a diameter of φ2mmX and a length of 200mm. Separate each slender rod-shaped compact and put it into a sintering furnace. Lower the temperature to 900°C, keep the temperature for 5 hours, and cool down to room temperature with the furnace.

[0038] Under dry conditions, it is placed for more than 24 hours; then it is cut, crushed, and screened with an 8-mesh sieve.

[0039] Preparation of composite friction material: material basic formula (by mass percentage): cashew nut oil ...

Embodiment 3

[0045] Preparation of short fine copper-based powder metallurgy friction material: basic material formula (by mass percentage): copper 65%, iron 3%, quartz stone powder 12%, aluminum oxide 5%, graphite powder 10%, calcium fluoride 5% %;

[0046]The forming agent is kerosene, based on the total weight of the mixture, and the content of the forming agent is 0.4% by weight. Mix the above materials evenly, pour them into the mold with a pressure of 400MPa, and press them into a slender rod shape with a diameter of φ3mmX and a length of 300mm. Separate each slender rod-shaped green compact and put it into a sintering furnace. Lower the temperature to 1100°C, keep the temperature for 2 hours, and cool down to room temperature with the furnace.

[0047] Under dry conditions, it is placed for more than 24 hours; then it is cut, crushed, and screened with an 8-mesh sieve.

[0048] Preparation of composite friction material: basic material formula (in mass percentage): cashew nut oil ...

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Abstract

The invention discloses an automotive copper-based powder metallurgy composite friction material and a manufacturing method thereof. The manufacturing method includes that firstly, a basis powder material is mixed with a molding agent uniformly to obtain a mixture, the mixture is poured into a mold and is shaped into slender rods by pressing, the slender rods are compacted and separated and then charged into a sintering furnace, and the sintering furnace is heated up under protection of nitrogen gas or hydrogen gas so that a copper-based powder metallurgy friction material is obtained; secondly, the copper-based powder metallurgy friction material is subjected to processes of shearing, grinding and screening; thirdly, by mass percent, 10-20% of cashew nut oil modified phenolic resin, 30-60% of the copper-based powder metallurgy friction material, 10-20% of reinforced fibers, 5-15% of abrasives, 10-20% of lubricants and 5-20% of fillers are mixed uniformly to obtain a powder mixture, and the powder mixture is then subjected to hot press molding, is cooled to the room temperature and then is discharged from the furnace. The automotive copper-based powder metallurgy composite frictional material has both advantages of high temperature resistance and low abrasion as the copper-based powder metallurgy friction material and high ductility and low hardness as the resin-based composite friction material.

Description

technical field [0001] The invention relates to a composite friction material, in particular to a copper-based powder metallurgy composite friction material for vehicles mainly based on copper-based powder metallurgy and a preparation method thereof. Background technique [0002] Composite friction materials are composed of materials with different physical and chemical properties and a high-molecular polymer matrix with low strength and good toughness. Since polymer materials usually cannot withstand high stress and high temperature, in order to improve the yield strength and high temperature stability of polymer materials, thermosetting resins with network structure are used, generally various modified high temperature phenolic resins. At the same time, in order to achieve the ideal braking effect and comprehensive mechanical properties, it is necessary to add various fibers, lubricating materials, abrasives and fillers, and the polymer matrix material is almost only used ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L61/14C08K3/08C08K3/36C08K3/22C08K3/30C08K3/04C08K7/10C08K7/00C08K3/16C08K3/26C22C1/05C22C9/00C22C32/00
CPCC08K3/04C08K3/08C08K3/16C08K3/22C08K3/26C08K3/30C08K3/36C08K7/00C08K7/10C08K2003/085C08K2003/0856C08K2003/162C08K2003/2227C08K2003/265C08K2003/3009C08K2003/3045C22C1/05C22C9/00C22C32/00C22C32/0005C08L61/14
Inventor 陈东
Owner SOUTH CHINA UNIV OF TECH
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