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

A technology of iron-based powder metallurgy and composite friction materials, applied in the field of resin-based composite friction materials, can solve the problems of automobile brake disc or drum scratches, friction noise, etc., achieve good anti-wear characteristics, stable friction coefficient, and avoid scratches The effect of injury

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

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Preparation of iron-based powder metallurgy friction material: material basic raw material formula: in terms of mass percentage, the matrix material formula is 50% iron, 8% copper, 10% quartz stone powder, 5% aluminum oxide, and 1% molybdenum disulfide; Graphite powder 10%; molding agent is kerosene, based on the total weight of the mixture, the content of the molding agent is 0.2% 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 φ2mmX and a length of 200mm. Separate each slender rod-shaped compact and put it into a sintering furnace. Lower the temperature to 1000°C, keep it warm for 4 hours, and cool down to room temperature with the furnace.

[0031] Under dry conditions, it is placed for more than 24 hours; then it is cut, crushed, and screened with an 8-mesh sieve.

[0032] Preparation of composite friction material: basic material formula (in mass percentage): c...

Embodiment 2

[0038] Preparation of short and fine iron-based powder metallurgy friction material: basic material formula (by mass percentage): 60% iron, 5% copper, 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.

[0039] Under dry conditions, it is placed for more than 24 hours; then it is cut, crushed, and screened with an 8-mesh sieve.

[0040] Preparation of composite friction material: material basic formula (by mass percentage): cashew nut oil mo...

Embodiment 3

[0046] Preparation of short and fine iron-based powder metallurgy friction material: basic material formula (by mass percentage): iron 70%, copper 1%, quartz stone powder 14%, aluminum oxide 5%, graphite powder 10%;

[0047] 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 φ3mmX and a length of 300mm. Separate each slender rod-shaped 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.

[0048] Under dry conditions, it is placed for more than 24 hours; then it is cut, crushed, and screened with an 8-mesh sieve.

[0049] Preparation of composite friction material: basic material formula (by mass percentage): cashew nut oil modified phenolic resin (Shen...

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Abstract

The invention discloses an automotive iron-based powder metallurgy composite frictional 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 an iron-based powder metallurgy friction material is obtained; secondly, the iron-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 iron-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 preserved at the temperature of 150-180 DEG C, cooled to the room temperature and then discharged from the furnace. The automotive iron-based powder metallurgy composite frictional material remains the stable friction coefficient and good abrasive resistance of the conventional powder metallurgy friction material, service life of the friction material is prolonged and its high-temperature stability is also improved.

Description

technical field [0001] The invention relates to a resin-based composite friction material, in particular to a composite friction material based on iron-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 a medium for transmitting or dispersin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L61/14C08K3/08C08K3/36C08K3/22C08K3/30C08K3/04C08K7/10C08K7/00C08K3/16C08K3/26C22C33/02
CPCC08K3/04C08K3/08C08K3/16C08K3/22C08K3/26C08K3/30C08K3/36C08K7/00C08K7/10C08K2003/085C08K2003/0856C08K2003/162C08K2003/2227C08K2003/265C08K2003/3009C08K2003/3045C08L61/14C22C33/02
Inventor 陈东
Owner SOUTH CHINA UNIV OF TECH
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