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Copper-free ceramic type friction material and preparation method thereof

A copper-free ceramic type, friction material technology, applied in the field of friction materials, can solve the problems of poor friction stability and thermal recession resistance of friction materials, and achieve good mechanical skeleton performance, good friction and wear performance, and reduce wear effects.

Inactive Publication Date: 2011-01-19
南京钛威科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to solve the problems of thermal decay resistance and poor friction stability of friction materials in a copper-free environment, and to provide an environmentally friendly friction material for brake pads, which can still maintain high temperature at 250-600 °C. Stable and good friction performance

Method used

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  • Copper-free ceramic type friction material and preparation method thereof
  • Copper-free ceramic type friction material and preparation method thereof
  • Copper-free ceramic type friction material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0035] According to weight percentage, alkaline earth metal compound 2%, carbon fiber 2%, phenolic resin 13%, nitrile rubber 4%, aramid fiber 3%, glass fiber 8%, ceramic fiber 4%, zircon 3%, magnesium oxide 4% %, 24% barium sulfate, 7% calcium carbonate, 15% mica powder, 5% vermiculite, and 6% friction powder, put them into a high-speed disperser, stir them evenly, take them out and put them into a mold for pressing and forming, and place them in a flat vulcanizer at 160 ℃, under the condition of pressure 15MPa, hold for 10 minutes, then take out the brake pads, and then sinter at 185 ℃ for 4 hours. Alkaline earth metal compound chooses Mg 0.3 Fe 1.5 TiO 4 , the ratio of equivalent length to equivalent width is 2.5-3, and the thickness is 0.5-5 microns; the carbon fiber is polyacrylonitrile-based carbon fiber.

Embodiment 2

[0037] According to weight percentage, alkaline earth metal compound 30%, carbon fiber 2%, phenolic resin 9%, nitrile rubber 3%, aramid fiber 3%, glass fiber 7%, ceramic fiber 3%, zircon 3%, magnesium oxide 3% %, 19% barium sulfate, 3% calcium carbonate, 5% mica powder, 5% vermiculite, 5% friction powder, put them into the high-speed disperser, stir them evenly, take them out and put them into the abrasive tool for pressing and forming. Under the condition of 160°C and a pressure of 15MPa, hold for 10 minutes, then take out the brake pads, and then sinter at 185°C for 4 hours. Alkaline earth metal compound chooses Mg 0.3 Fe 1.5 TiO 4 , the ratio of equivalent length to equivalent width is 2.5-3, and the thickness is 0.5-5 microns; the carbon fiber is polyacrylonitrile-based carbon fiber.

Embodiment 3

[0039] According to weight percentage, alkaline earth metal compound 2%, carbon fiber 30%, phenolic resin 9%, nitrile rubber 3%, aramid fiber 1%, glass fiber 4%, ceramic fiber 4%, zircon 5%, magnesium oxide 4% %, 24% barium sulfate, 6% calcium carbonate, 3% vermiculite, and 5% fluorite powder are placed in a high-speed disperser, stirred evenly, taken out and put into a mold for pressing and forming, in a flat vulcanizing machine at 160°C, pressure 15MPa Under the conditions, keep it for 10 minutes, then take out the brake pads, and then sinter at 185°C for 4 hours. Alkaline earth metal compound chooses Mg 0.3 Fe 1.5 TiO 4 , the ratio of equivalent length to equivalent width is 2.5-3, and the thickness is 0.5-5 microns; the carbon fiber is polyacrylonitrile-based carbon fiber.

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Abstract

The invention discloses a copper-free ceramic type friction material and a preparation method thereof. The friction material at least comprises 2 to 30 mass percent of alkaline earth-based metallic compound and 2 to 30 mass percent of carbon fiber, wherein the alkaline earth-based metallic compound is MxFeyTiOz, M is alkaline earth metallic element, namely Be, Mg, Ca, Sr or Ba, x is 0.2 to 2, y is 1 to 2, and z is 4 to 16. The friction material prepared by the method has the advantages of: high friction and wear property, higher heat conductivity, high performance of resisting high-temperature recession, and capacity of efficiently reducing the temperature of a friction surface in the braking process.

Description

technical field [0001] The invention belongs to the field of friction materials, in particular to an environment-friendly brake pad material free of copper and asbestos. Background technique [0002] Nowadays, many cars are developing towards high speed and high load, which puts forward more stringent requirements for braking materials. For example, the instantaneous temperature of disc brakes can reach 400-600°C during braking, and the braking temperature on some long slopes can reach above 800°C. , it is urgent to develop a high-performance and environmentally friendly friction material. The ABS (anti-lock braking) system commonly used in high-end cars. When the ABS system is working, it is equivalent to point braking at a very high frequency. How to quickly dissipate the accumulated heat in the braking gap requires the friction material to have a high thermal conductivity. At the same time, the material also needs to have a good Excellent friction and wear performance, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/14C04B35/83C04B35/622B28B3/00B28B1/52F16D69/02
Inventor 陆小华史以俊陈健王昌松穆立文
Owner 南京钛威科技有限公司
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