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Resin based powder metallurgy composite friction material for vehicles and preparation method thereof

A composite friction material, powder metallurgy technology, applied in the direction of friction linings, mechanical equipment, etc., can solve the problems of friction noise, scratches, etc., and achieve the effects of low wear toughness, good fit, and improved service life

Inactive Publication Date: 2016-08-10
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 powder metallurgy friction material, it is easy to cause scratches and friction noise on the brake disc or drum of the automobile.

Method used

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  • Resin based powder metallurgy composite friction material for vehicles and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Preparation of short and fine iron-based powder metallurgy friction material: in terms of mass percentage, the basic formula of the material: iron 55%, tin 10%, quartz stone powder 10%, aluminum oxide 5%, molybdenum disulfide 5%; graphite powder 15% . The molding agent is kerosene, and the addition amount of the molding agent is 0.3% of the total weight of the basic formula of the above-mentioned materials. 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 a 10-mesh sieve.

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

Embodiment 2

[0037] Preparation of short and fine copper-based powder metallurgy friction material: basic material formula (by mass percentage): 60% copper, 5% nickel, 20% aluminum oxide, 5% molybdenum disulfide, and 10% graphite powder. The molding agent is kerosene, based on the total weight of the mixture, and the content of the molding agent is 0.5% 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 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 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 percentage): cashew nut oil modi...

Embodiment 3

[0045] Preparation of short fine iron-based powder metallurgy friction material: basic material formula (by mass fraction): 65% iron, 2% tin, 10% quartz stone powder, 8% aluminum oxide, and 15% graphite powder. 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.

[0046] Under dry conditions, it is placed for more than 24 hours; then it is cut, crushed, and screened with an 8-mesh sieve.

[0047] Preparation of composite friction material: basic material formula (by mass percentage): cashew nut oil modified phenolic resin (She...

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Abstract

The invention discloses a preparation method of a resin based powder metallurgy composite friction material for vehicles, wherein the preparation method comprises the following steps: 1) preparing a powder metallurgy friction material: mixing evenly a base material and a forming agent, pouring the mixture into a mold, pressing to slender rods, separating the slender rod-shaped pressed blanks, and sintering, to obtain a powder metallurgy friction material; 2) shearing, crushing and screening; 3) mixing: according to the mass percentage, evenly co-mixing 10-20% of high-temperature-resistant modified resin, 40-60% of the powder metallurgy friction material, 10-20% of a reinforcing fiber, 5-15% of an abrasive, 10-20% of a lubricating material and 5-20% of a filler; 4) producing and preparing a resin based composite friction material; 5) post-treating; and 6) carrying out mechanical processing. The resin based powder metallurgy composite friction material retains the stable friction coefficient and good anti-abrasion properties of the powder metallurgy friction material. The service life and the high-temperature stability of the friction material are improved.

Description

technical field [0001] The invention relates to a composite friction material, in particular to a resin-based powder metallurgy composite friction material for vehicles mainly based on resin-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 as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L61/14C08K13/04C08K3/08C08K3/22C08K3/30C08K3/04C08K7/10C08K7/06C08K7/08F16D69/02
CPCC08K3/04C08K3/08C08K3/22C08K3/30C08K7/06C08K7/08C08K7/10C08K13/04C08K2003/085C08K2003/0856C08K2003/2227C08K2003/3009C08K2003/3045F16D69/028C08L61/14
Inventor 陈东
Owner SOUTH CHINA UNIV OF TECH
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