Automotive copper-based powder metallurgy composite friction material and manfuacturing 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, scratches on automobile brake discs or drums, and achieve the effects of stable friction coefficient, good anti-wear characteristics, and wide application prospects.

Inactive Publication Date: 2016-07-20
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

Method used

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  • Automotive copper-based powder metallurgy composite friction material and manfuacturing method thereof

Examples

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[0028] Example 1

[0029] Preparation of short-thin copper-based powder metallurgical friction materials: Basic material formula: In terms of mass percentage, the base material formula is 50% copper, 8% iron, 10% quartz powder, 15% aluminum oxide, and 2% molybdenum disulfide; Graphite powder 10%; Boron nitride 5%. The forming agent is kerosene, and the added amount of the forming agent is 0.2% of the total weight of the base material. Mix the above materials uniformly, pour them into the mold and press them into a slender rod shape with a diameter of 2mm×200mm in length. Separate the slender rod-shaped compacts and put them into the sintering furnace. Under the conditions, the temperature rises at 1100℃, keeps the temperature for 4h, and cools to room temperature with the furnace.

[0030] Under dry conditions, leave it for more than 24 hours; then shear and pulverize, and screen with an 8-mesh screen to obtain a copper-based powder metallurgy friction material.

[0031] Preparati...

Example Embodiment

[0036] Example 2

[0037] Preparation of short-thin copper-based powder metallurgy friction materials: basic material formula (in mass percentage): 60% copper, 5% iron, 5% quartz powder, 10% aluminum oxide, 3% molybdenum disulfide; calcium fluoride 7%, graphite powder 10%; the forming agent is kerosene, and based on the total weight of the mixture, the content of the forming agent is 0.5% of the total weight. Mix the above materials uniformly, pour them into the mold and press them into a slender rod shape with a diameter of 2mm×200mm in length. Separate the slender rod-shaped compacts and put them into the sintering furnace. Under the conditions, the temperature rises by 900℃, keeps the temperature for 5 hours, and cools to room temperature with the furnace.

[0038] Under dry conditions, leave it for more than 24 hours; then shear and pulverize, and screen with 8 mesh screen.

[0039] Preparation of composite friction materials: basic material formula (in mass percentage) cashew ...

Example Embodiment

[0044] Example 3

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

[0046] The forming agent is kerosene, and based on the total weight of the mixture, the content of the forming agent is 0.4% of the total weight. Mix the above materials uniformly, pour them into the mold and press them into a slender rod shape with a diameter of φ3mm×300mm in length. Separate the slender rod-shaped compacts and put them into the sintering furnace. Under the conditions, the temperature rises at 1100℃, keeps holding for 2h, and cools to room temperature with the furnace.

[0047] Under dry conditions, leave it for more than 24 hours; then shear and pulverize, and screen with 8 mesh screen.

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

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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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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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