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Resin-based powder metallurgy steel fiber friction material used for vehicle and production method thereof

A friction material and powder metallurgy technology, applied in the field of resin-based powder metallurgy steel fiber friction materials for vehicles and their preparation, can solve problems such as excessive wear, scratches on automobile brake discs or drums, and achieve good toughness and good wear resistance. Properties, the effect of moderate elastic modulus

Inactive Publication Date: 2016-11-09
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 excessive wear on the brake disc or drum of the car

Method used

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  • Resin-based powder metallurgy steel fiber friction material used for vehicle and production method thereof

Examples

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 55% copper, 5% iron, 3% tin, 10% quartz powder, 15% aluminum oxide, disulfide Molybdenum 2%; graphite powder 10%; molding agent is kerosene, based on the total weight of the mixture, the addition of the molding agent is 0.2% of the weight of the mixture. Mix the above materials evenly, pour them into the mold with a pressure of 500MPa, and press them into a slender rod shape with a diameter of φ2mm×200mm in length, separate each slender rod-shaped green compact, and put it into a sintering furnace. Under the conditions, the temperature rises to 1000°C, keeps the temperature for 4 hours, and cools to room temperature with the furnace.

[0030] Under dry conditions, it is placed for more than 24 hours; then it is cut, crushed, and screened with an 8-mesh sieve.

[0031] Preparation of composite friction material: ...

Embodiment 2

[0037] Preparation of short and fine copper-based powder metallurgy friction material: basic material formula (by mass percentage): 65% copper, 5% quartz powder, 10% aluminum oxide, 3% molybdenum disulfide; 7% calcium fluoride, graphite powder 10%; the forming agent is kerosene, 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 evenly, pour them into the mold with a pressure of 400MPa, and press them into a slender rod shape with a diameter of φ2mm×300mm in length, separate each slender rod-shaped green compact, and put it into a sintering furnace. Under the conditions, the temperature rises to 900°C, keeps the temperature for 5 hours, and cools 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 pe...

Embodiment 3

[0045] Preparation of short and fine copper-based powder metallurgy friction material: basic material formula (by mass percentage): copper 70%, aluminum oxide 15%, graphite powder 15%;

[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 500MPa, and press them into a slender rod shape with a diameter of φ3mm×300mm in length, separate each slender rod-shaped green compact, and put it into a sintering furnace. Under the conditions, the temperature rises to 1100°C, keeps warm for 2 hours, and cools 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 (by mass percentage): cashew nut oil modified phenolic resin 15% (Shengquan PF6291A...

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Abstract

The invention discloses a method for producing a resin-based powder metallurgy steel fiber friction material used for vehicle. The method comprises the following steps: uniformly mixing a matrix powder material and a forming agent, dumping a mixture in a die for compacting the mixture to obtain several elongated rods, compacting the elongated rods, separating the rods, putting the rods in a sintering furnace, heating the material under condition of introduction of nitrogen or hydrogen to obtain a copper-based powder metallurgy friction material; shearing the material, crushing the material, and sieving the material; uniformly mixing 10-20% of nitrile rubber-modified phenolic resin, 20-40% of the copper-based powder metallurgy friction material, 15-30% of steel fiber, 5-15% of an abrasive, 10-20% of a lubrication material, and 5-20% of a filling material; performing hot press molding, cooling the material, and discharging. According to the enhancement effect of the steel fiber, by combining the characteristics of high temperature resistance, low abrasion of the copper-based powder metallurgy friction material as well as good toughness and low hardness of the resin-based composite friction material, the obtained material has the characteristics of high temperature resistance, low abrasion, good flexible performance and low hardness.

Description

technical field [0001] The invention relates to a resin-based copper-based powder metallurgy composite friction material, in particular to a resin-based powder metallurgy steel fiber friction material for vehicles with steel fibers as reinforcing fibers 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 reinforcing fibers, lubricating materials, abrasives and fillers, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L61/14C08K13/04C08K7/06C08K3/08C08K3/36C08K3/04C08K3/30C08K3/22C08K3/26C08K3/34B22F1/00B22F3/10
CPCC08K3/04C08K3/08C08K3/22C08K3/26C08K3/30C08K3/34C08K3/36C08K7/06C08K13/04B22F3/1007C08L2201/08C08K2201/004C08K2201/003C08K2003/085C08K2003/265C08K2003/3045C08K2003/2227B22F2998/10B22F1/10C08L61/14B22F1/0003B22F3/02
Inventor 陈东
Owner SOUTH CHINA UNIV OF TECH
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