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Brake pad material for high-speed railway passenger train and preparing method thereof

A technology for brake pads and high-speed railways, applied in mechanical equipment, friction linings, metal processing equipment, etc., can solve the problems of insufficient interface bonding strength, falling off of hard particles, increased wear rate, etc., and achieve excellent performance. , the effect of low wear rate and high thermal conductivity

Active Publication Date: 2017-12-12
哈尔滨新干线轨道交通科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problem of adding hard ceramic particles to increase the friction coefficient of traditional brake pad materials, there are problems such as insufficient interface bonding strength. If the interface bonding strength is insufficient, the hard particles will fall off, resulting in an increase in wear rate. Problems such as a decrease in the coefficient of friction occur

Method used

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  • Brake pad material for high-speed railway passenger train and preparing method thereof
  • Brake pad material for high-speed railway passenger train and preparing method thereof
  • Brake pad material for high-speed railway passenger train and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] 1. Ti 2 The preparation method of AlC powder

[0047] Mix titanium powder, aluminum powder and carbon black according to the molar ratio of 3:1.4:0.8, and then ignite under the protection of no pressure and inert gas to synthesize Ti with a stoichiometric ratio of 2:1:0.7 through a self-propagating process 2 AlC powder.

[0048] 2. Preparation method of binder

[0049] The binder consists of 95% by mass of kerosene and 5% by mass of dialkyl phosphates. The binder is added according to 1%-5% (mass) of the total mass of the raw material powder.

[0050] It is found through tests that the effect of adding 5% (mass) of the total mass of the raw material powder is the best. The binder prepared according to the above ratio solves the problem of difficult mixing of copper and graphite caused by uneven density, and at the same time, there is almost no residue after volatilization at high temperature. Among them, the role of kerosene is a binder, and the role of dialkyl pho...

Embodiment 2

[0061] Illustrate effect of the present invention by following experiment:

[0062] In this embodiment, brake material is prepared according to the following specific formula and the best implementation mode, and the specific formula is shown in Table 1.

[0063] The best implementation mode of the preparation method of brake sheet material in embodiment 1 is:

[0064] 1) Mixing: Put the raw material powder into the mixing machine after drying, sieving and weighing, spray into the binder, and mix for 2 hours;

[0065] 2) Prefabricated compact: put the raw materials mixed in step 1) into a steel abrasive tool for pressing, with a load of 400MPa;

[0066] 3) Sintering: In a reducing atmosphere, heat up to a sintering temperature of 980°C at a rate of 10°C / min, pressurize to 30MPa at the same time, keep the temperature for 2h, keep the pressure at the same time for 0.5h, then reduce the pressure to 1MPa, and the heat preservation is over After cooling with the furnace, when the...

Embodiment 3

[0078] The difference between this embodiment and Experiment 2 in Embodiment 2 is that the preparation method of the brake pad material is different, and the others are the same as Experiment 1, and the specific preparation method is:

[0079] 1) Mixing: use wet mixing, dry the raw material powder, sieve and weigh it, put the raw material powder into the mixer, spray into the binder, and mix for 2 hours;

[0080] 2) Prefabricated compact: put the raw materials mixed in step 1) into a steel abrasive tool for pressing, with a load of 300MPa;

[0081] 3) Sintering: Carry out sintering in a reducing atmosphere, raise the temperature to a sintering temperature of 850°C at a heating rate of 10°C / min, pressurize to 30MPa at the same time, keep the temperature for 1h, keep the pressure for 0.5h while keeping the temperature, then reduce the pressure to 1MPa, and keep the temperature Cool with the furnace after the end, and unload the pressure when the furnace temperature is lower than...

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Abstract

The invention discloses a brake pad material for a high-speed railway passenger train and a preparing method thereof and belongs to the technical field of powder metallurgy friction materials. The brake pad material is prepared by the following steps: after drying and sieving powdery raw materials, feeding the raw materials into a mixer, and spraying an adhesive; after mixing the materials, placing the materials in a steel mould, and carrying out pressing; and then, carrying out sintering at a reduction atmosphere, and then, carrying out heat treatment in a reduction atmosphere, wherein the powdery raw materials comprise copper powder, iron powder, Ti2AlC powder, chromium powder, nickel powder, manganese powder, silicon dioxide, graphite, boron nitride and molybdenum disulfate. The invention further provides the preparing method of the brake pad material. In the invention, in-situ TiC obtained through the Ti2AlC is used as a main friction component, the material of an in-situ nanometer TiC layered framework is prepared, the copper is accordingly used as a matrix, a small quantity of other metals is added, the content of lubricating components, such as the graphite, is regulated, and a novel material with a great brake effect and a low wear rate is finally obtained. The material is suitable for being used as the brake pad material for the high-speed railway passenger train.

Description

technical field [0001] The invention relates to a brake pad material for high-speed railway trains and a preparation method thereof, belonging to the technical field of powder metallurgy friction materials. Background technique [0002] There are many basic braking methods for trains, such as friction braking, resistance braking, magnetic track eddy current braking, etc. Among them, friction braking is widely used. Friction braking can be divided into two types: tread braking and disc braking. The former is a brake shoe, and the latter is a brake disc / brake pad friction pair. With the rapid development of the national economy, the high-speed railway transportation has become an inevitable trend, especially the high-speed railway with a speed of 300km per hour and above is getting great development, and the continuous improvement of the train speed has also raised more and more demands on its braking performance. more stringent requirements. The braking efficiency of tread ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/00C22C30/02C22C32/00C22C1/05B22F1/00F16D69/02
CPCF16D69/027C22C1/058C22C9/00C22C30/02C22C32/0005C22C32/0084B22F2998/10B22F2999/00B22F1/103B22F1/10B22F3/1007B22F2003/248B22F2201/01B22F3/02
Inventor 姜久兴王帅朱思宇
Owner 哈尔滨新干线轨道交通科技有限公司
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