Composite frictional material and preparation method thereof

A composite friction material and friction material technology, applied in the direction of friction linings, mechanical equipment, etc., can solve the problems of friction noise, automobile brake disc or drum scratches, etc., achieve low friction noise, improved high temperature stability, elastic modulus Moderate effect

Inactive Publication Date: 2017-05-10
CHONGQING AOSHUNTE MACHINERY MFG
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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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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0038] The invention provides a method for preparing a composite friction material, comprising the following steps:

[0039] 1) Preparation of iron-based powder metallurgy friction material: mix the matrix powder material and molding agent evenly, pour it into a mold and press it into a plurality of slender rods, separate each slender rod-shaped compact, and put it into a sintering furnace In the process, under the condition of feeding nitrogen or hydrogen, the temperature rises to 900-1000°C, heats it for 3-6 hours, and cools to room temperature to obtain an iron-based powder metallurgy friction material; in terms of mass percentage, the formula composition of the base material is: iron The base powder component is 60-75%, the friction component is 20-25%, and the lubricating component is 20-25%. In terms of mass percentage, the iron-based powder component consists of 85-90% iron powder and 10-15% copper Powder composition; the friction component is one or more of quartz ston...

Embodiment 1

[0062] Preparation of composite 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, 1% molybdenum disulfide; graphite powder 10% The 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 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.

[0063] Under dry conditions, it is placed for more than 24 hours; then it is cut, crushed, and screened with an 8-mesh sieve.

[0064] Preparation of composite friction material: basic material formula (in terms of mas...

Embodiment 2

[0069] Preparation of composite friction material: Material basic raw material formula: in terms of mass percentage, the matrix material formula is 45% iron, 8% copper, 10% quartz powder, 5% aluminum oxide, 3% molybdenum disulfide; graphite powder 15% The forming agent is kerosene, based on the total weight of the mixture, the content of the forming agent is 0.3% of the total weight. Mix the above materials evenly, pour them into the mold with a pressure of 600MPa, and press them into a slender rod shape with a diameter of φ3mm×200mm in length, separate each slender rod-shaped green compact, and put it into a sintering furnace. Under the conditions, the temperature rises to 800°C, keeps the temperature for 4 hours, and cools to room temperature with the furnace.

[0070] Under dry conditions, it is placed for more than 15 hours; then it is cut, crushed, and screened with an 8-mesh sieve. Preparation of composite friction material: basic material formula (by mass percentage): ...

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Abstract

The invention provides a preparation method of a composite frictional material. The preparation method comprises the following steps that 1, a ferrous-based powder metallurgical frictional material is prepared; 2, shearing, smashing and screening are performed; 3, material mixing is performed; 4, the composite frictional material is prepared; 5 posttreatment is performed; 6, the composite frictional material is machined. Compared with the prior art, the composite frictional material integrates the characteristics of high temperature resistance and low abrasion resistance of the ferrous-based powder metallurgical frictional material and the characteristics of good toughness and low hardness of a resin-based composite material and has the advantages of high temperature resistance, low abrasion resistance, good toughness and low hardness. The ferrous-based powder metallurgical frictional material is used for preparing an automobile braking accessory, scratching of an automobile brake disc or drum is effectively avoided based on good braking performance, and frictional noise is small.

Description

technical field [0001] The invention belongs to the technical field of friction materials, and in particular relates to a composite friction material and a preparation method thereof. Background technique [0002] Friction material is a functional accessory used in many sports machinery and equipment to play the role of transmission, braking, deceleration, steering, parking, etc. It can be said that since the beginning of mechanical movement, human beings have the requirement of braking, wooden blocks, Cowhide, rubber, etc. have all been used as braking materials. Before the 1970s and 1980s, asbestos friction materials had been widely used by humans as a traditional product. After that, it was rumored that asbestos would cause lung lesions and mesenchymal tumors and be related to the occurrence of lung cancer. [0003] In 1972, the International Oncology Symposium confirmed that asbestos fibers contained carcinogens. Since then, the asbestos-free and pollution-free friction...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L61/14C08K13/04C08K3/08C08K3/36C08K3/22C08K3/30C08K3/04C08K7/08C08K7/00F16D69/02
CPCC08K13/04C08K3/04C08K3/08C08K3/22C08K3/30C08K3/36C08K7/00C08K7/08C08K2003/085C08K2003/0856C08K2003/2227C08K2003/3009C08K2003/3045C08K2201/004C08L2201/08F16D69/028C08L61/14
Inventor 唐科健
Owner CHONGQING AOSHUNTE MACHINERY MFG
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