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Friction braking material and preparation method thereof

A technology for friction brake materials and friction performance, applied in chemical instruments and methods, other chemical processes, etc., can solve problems such as complicated process and long preparation time, and achieve the effects of simplifying process, reducing cost and shortening preparation time

Active Publication Date: 2009-05-06
HAIAN JIAHE CHEM FIBER
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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 provide a friction brake material with short preparation time and simple process and its preparation method in order to overcome the disadvantages of long preparation time and complicated process of the existing preparation method of friction brake material

Method used

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  • Friction braking material and preparation method thereof
  • Friction braking material and preparation method thereof
  • Friction braking material and preparation method thereof

Examples

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preparation example Construction

[0015] The preparation method of the friction brake material provided by the invention comprises mixing short carbon fiber, binder, silicon powder and graphite powder to obtain a mixture; molding the mixture to obtain a compact; and sintering the compact in an inert atmosphere .

[0016] The short carbon fiber, binder, silicon powder and graphite powder can be mixed by conventional mixing methods. In order to mix the various components more uniformly, preferably, the fiber, the binder, the silicon powder and the carbon powder are mixed in a mixer. The mixing temperature can be 10-40°C, preferably 20-30°C; the mixing time can be 1-40 minutes, preferably 3-25 minutes. During the mixing process, the various raw materials are mixed evenly, so that the short carbon fibers are evenly dispersed in the final material.

[0017] When mixing, based on 100 parts by weight of fiber, the amount of binder can be 20-300 parts by weight, preferably 50-250 parts by weight; the amount of silic...

Embodiment 1

[0028] This embodiment is used to illustrate the friction brake material provided by the present invention and its preparation method.

[0029]100 parts by weight of polyacrylonitrile-based short carbon fibers (type T700, Changzhou Wujin Huadong Special Fiber Factory, with an average diameter of 6 microns and an average length of 10 cm), 200 parts by weight of modified phenolic resin (FB-2, Xi'an Taihang Fire-retardant Polymer Research Institute, particle size is 120 mesh), 300 parts by weight silicon powder (particle size is 120 mesh), 250 parts by weight graphite powder (Qingdao Tiansheng Graphite Co., Ltd., particle size is 120 mesh), 50 parts by weight silicon carbide ( Particle size is 160 mesh), 50 parts by weight of silicon dioxide (particle size is 160 mesh) and 50 parts by weight of silicon nitride (particle size is 120 mesh) in a mixer (JF810SJ plow rake mixer, Jilin University Institute of Mechanical and Electrical Equipment ) at 22° C. for 10 minutes to obtain a mi...

Embodiment 2

[0034] This embodiment is used to illustrate the friction brake material provided by the present invention and its preparation method.

[0035] 100 parts by weight of pitch-based carbon fiber (T300, Lanzhou Jintan Carbon Fiber Research Institute, with an average diameter of 8 microns and an average length of 7 cm), 60 parts by weight of phenolic resin (PF-6818, Yingkou Shengquan Haworth Chemical Co., Ltd. company, particle size is 160 mesh), 80 parts by weight of silicon powder (particle size is 160 mesh) and 100 parts by weight of graphite powder (Qingdao Tiansheng Graphite Co., Ltd., particle size is 160 mesh) in the mixer (JF810SJ rake type mixer , Jilin University Institute of Mechanical and Electrical Equipment) mixed at 30°C for 20 minutes to obtain a mixture.

[0036] The above mixture was pressed into a rough billet in a metal mold, and the pressing conditions included: pressing pressure of 20 MPa, pressing speed of 5 mm / min, pressing temperature of 30° C., and pressin...

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Abstract

The invention discloses a friction braking material, which contains resin carbon, graphite carbon, silicon, silicon carbide, and short carbon fiber. The invention also provides a method for preparing the friction braking material, wherein the method comprises the following steps: the short carbon fiber, an adhesive, silicon powder and graphite powder are mixed to obtain a mixture; the mixture is molded to obtain a molded blank; and the molded blank is sintered in inert atmosphere. The friction braking material can be obtained by only mixing and molding the short carbon fiber, the adhesive, the silicon powder and carbon powder into the molded blank and then sintering the molded blank in the inert atmosphere; compared with the prior method which needs high-temperature carbonization treatment, an isothermal CVD densification process and siliconizing treatment by a high-temperature reaction, the method greatly shortens the preparation time and simplifies the process. The material contains the short carbon fiber which is evenly dispersed; and compared with the prior friction braking material which adopts an integral felt or a braid, the material greatly reduces the cost.

Description

technical field [0001] The invention relates to a friction braking material and a preparation method thereof. Background technique [0002] With the development of vehicles, trains, airplanes and other means of transportation in the direction of high power, high speed, and heavy load, the requirements for comfort and safety performance are continuously improved, and correspondingly more stringent requirements are put forward for the performance of friction braking materials. [0003] The traditional friction and braking materials are mainly semi-metallic friction materials, powder metallurgy friction materials and a small amount of asbestos friction materials, but they all have different degrees of deficiencies, such as semi-metal and powder metallurgy friction materials with high density (>3.0g / cm 3 ), easy to rust, and loud when braking; asbestos is a carcinogen, and its use is prohibited. These can no longer meet the needs of industrial development, and new brake mate...

Claims

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Application Information

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IPC IPC(8): C09K3/14
Inventor 旷文敏张日清董俊卿宫清
Owner HAIAN JIAHE CHEM FIBER
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