Preparation method for high-speed rail brake powder metallurgy copper base friction material

A technology of powder metallurgy and friction materials, which is applied in the field of preparation of powder metallurgy copper-based friction materials for high-speed rail brakes, can solve problems such as unstable friction coefficient, poor high temperature stability, and increased wear, and achieve improved friction stability and enhanced friction Force, improve the effect of wear and tear

Inactive Publication Date: 2017-11-07
常州市宝平不绣钢制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem mainly solved by the present invention: Aiming at the problems that the existing copper-based powder metallurgy braking materials have poor high-temperature stability, thermal recession often occurs during the braking process, and the friction coefficient is unstable, resulting in increased wear, a high-speed iron brake material is provided. Preparation method of dynamic powder metallurgy copper-based friction material

Method used

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  • Preparation method for high-speed rail brake powder metallurgy copper base friction material

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example 1

[0016] First, according to the mass ratio of 1:10, molybdenum trioxide and 1% potassium permanganate solution were stirred and mixed and placed in a beaker. After ultrasonic dispersion at 200W for 10 minutes, they were left to stand at room temperature for 45 minutes. After completion, dropwise add 20% glacial acetic acid solution of potassium permanganate solution quality in the beaker, control the time of dripping to be 25min, after the completion of the dropwise addition, stir and mix and leave it to stand for 3 days, after the completion of the standstill, add it at 170 Heating in an oil bath at ℃ for 20 hours, then standing to cool to room temperature, filtering to obtain a filter cake, washing with absolute ethanol and deionized water for 3 times, drying naturally, and grinding to prepare modified molybdenum trioxide particles, according to In terms of parts by weight, weigh 1 part of modified molybdenum trioxide particles, 10 parts of ferric nitrate and 75 parts of deion...

example 2

[0019] First, according to the mass ratio of 1:10, molybdenum trioxide and 1% potassium permanganate solution were stirred and mixed and placed in a beaker. After ultrasonic dispersion at 250W for 13 minutes, they were left at room temperature for 53 minutes. After completion, dropwise add potassium permanganate solution quality 20% glacial acetic acid solution in the beaker, control the time of dropping to be 28min, after the completion of the dropwise addition, stir and mix and leave it to stand for 4 days, after the completion of the standstill, add the solution at 175 Heating in an oil bath at ℃ for 22 hours, then standing to cool to room temperature, filtering to obtain a filter cake, washing with absolute ethanol and deionized water for 4 times, drying naturally, and grinding to prepare modified molybdenum trioxide particles, according to In terms of parts by weight, weigh 1 part of modified molybdenum trioxide particles, 13 parts of ferric nitrate and 78 parts of deioniz...

example 3

[0022]First, according to the mass ratio of 1:10, molybdenum trioxide and 1% potassium permanganate solution were stirred and mixed and placed in a beaker. After ultrasonic dispersion at 300W for 15 minutes, they were left at room temperature for 60 minutes. After completion, drip potassium permanganate solution quality 20% glacial acetic acid solution in the beaker, control the time of dripping to be 30min, after the completion of the dropwise addition, stir and mix and leave it to stand for 5 days, after the completion of the standstill, add it at 180 Heating in an oil bath at ℃ for 24 hours, then standing to cool to room temperature, filtering to obtain a filter cake, washing with absolute ethanol and deionized water for 5 times, drying naturally, and grinding to prepare modified molybdenum trioxide particles, according to In terms of parts by weight, weigh 2 parts of modified molybdenum trioxide particles, 15 parts of ferric nitrate and 80 parts of deionized water, put them...

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Abstract

The invention discloses a method for preparing a high-speed rail brake powder metallurgy copper-based friction material, which belongs to the technical field of friction material preparation. The present invention oxidizes and modifies molybdenum trioxide by mixing potassium permanganate solution and glacial acetic acid, crystallizes it to form a rod-shaped structure, and disperses it in deionized water, and loads the copper hydroxide colloid formed by the hydrolysis of copper nitrate on the rod-shaped structure. The surface of molybdenum trioxide is mixed with flake graphite, atomized copper powder, iron powder, etc. by ball milling and sintered at high temperature to form a sintered material, which is crushed, milled and sieved to prepare a copper-based friction material. Molybdenum trioxide in rod-shaped composite particles The high-temperature stability performance of the copper-based friction material is effectively enhanced, and at the same time, the rod-shaped structure effectively enhances the friction force and improves the wear loss during its braking wear, and has broad application prospects.

Description

technical field [0001] The invention discloses a method for preparing a high-speed rail braking powder metallurgy copper-based friction material, which belongs to the technical field of friction material preparation. Background technique [0002] High-speed transportation vehicles have become an inevitable trend of vehicle development, especially high-speed railway transportation has increasingly become the goal and direction of key research and development in various countries. Since the speed of the train is in a cubic relationship with the braking power. Promptly train speed doubles, and its braking power just needs to increase eight times. Therefore, when the train speed is increased, to ensure the safe operation of the train at high speed, it is necessary to require that the braking device of the train must have a greater braking capacity, and at the same time ensure that the train braking process is stable. Brake pads are the key components of friction brakes, so the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/02C22C32/00C22C1/05C22C1/10C22C33/02C22C38/16C22C38/12C22C38/02C01G39/02
CPCC22C30/02C01G39/02C22C1/05C22C32/001C22C33/0278C22C38/02C22C38/12C22C38/16
Inventor 张桂芳王艳芹
Owner 常州市宝平不绣钢制品有限公司
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