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Reinforced high-speed train brake pad material and preparation method thereof

A technology for brake pads and high-speed trains, applied in chemical instruments and methods, friction linings, mechanical equipment, etc. Workability, stable friction coefficient, high friction coefficient effect

Active Publication Date: 2021-10-26
WUHAN WAN BANG LASER DIAMOND TOOLS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the speed of the train increases, the braking load gradually increases, and the kinetic energy and thermal shock generated during braking also greatly increase.
The traditional friction components in the existing brake pads have high hardness and poor plasticity, and poor wettability with Cu or Cu alloy matrix, which reduces the bonding strength between the friction components and the matrix, resulting in high extrusion of the friction components. Peeling occurs under pressure, reducing the friction coefficient and causing greater damage to the brake disc
In addition, the copper on the friction surface softens and flows at high temperatures, resulting in large fluctuations in the friction coefficient and obvious thermal decay during the braking process.

Method used

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  • Reinforced high-speed train brake pad material and preparation method thereof
  • Reinforced high-speed train brake pad material and preparation method thereof
  • Reinforced high-speed train brake pad material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Preparation of a MoAl 0.97 Si 0.03 B Reinforced materials for high-speed train brake pads, the mass percentage of each component is as follows: Cu powder: 60%, Fe powder: 12%, high-carbon ferrochrome powder: 2%, MoAl 0.97 Si 0.03 B powder: 8%, graphite powder: 14%, MoS 2 Powder: 4%.

[0031] 1) Weigh raw materials: Weigh Cu powder 60%, Fe powder: 12%, high-carbon ferrochrome powder: 2%, MoAl by mass percentage 0.97 Si 0.03 B powder: 8%, graphite powder: 14%, MoS 2 Powder: 4%, of which the purity of Cu powder, Fe powder, and high-carbon ferrochrome powder is 99.0%, and the particle size is 84um; MoAl 0.97 Si 0.03 The purity of powder B is 99.0%, and the particle size is 90um; MoS 2 The purity of powder and graphite powder is 99.6%, and the particle size is 90um.

[0032] 2) Mixing: the prepared raw material powder Cu powder, Fe powder, high carbon ferrochrome powder, MoAl 0.97 Si 0.03 B powder, graphite powder and MoS 2 The powder is mixed by a three-dimensio...

Embodiment 2

[0037] Preparation of a MoAl 0.97 Si 0.03 B Reinforced materials for high-speed train brake pads, the mass percentage of each component is as follows: Cu powder: 70%, Fe powder: 4%, high-carbon ferrochrome powder: 10%, MoAl 0.97 Si 0.03 B powder: 2%, graphite powder: 10%, MoS 2 Powder: 4%,.

[0038] 1) Weigh raw materials: Weigh Cu powder by mass percentage: 70%, Fe powder: 4%, high-carbon ferrochrome powder: 10%, MoAl 0.97 Si 0.03 B powder: 2%, graphite powder: 10%, MoS 2 Powder: 1.5%, of which the purity of Cu powder, Fe powder, and high-carbon ferrochrome powder is 99.3%, and the particle size is 80um; MoAl 0.97 Si 0.03 The purity of powder B is 99.2%, and the particle size is 100um; MoS 2 The purity of powder and graphite powder is 99.8%, and the particle size is 93um.

[0039] 2) Mixing: the prepared raw material powder Cu powder, Fe powder, high carbon ferrochrome powder, MoAl 0.97 Si 0.03 B powder, graphite powder and MoS 2 The powder is mixed by a three-dim...

Embodiment 3

[0044] Preparation of a MoAl 0.97 Si 0.03B Reinforced materials for high-speed train brake pads, the mass percentages of each component are as follows: Cu powder: 63%, Fe powder: 10%, high-carbon ferrochrome powder: 4%, MoAl 0.97 Si 0.03 B powder: 4%, graphite powder: 7.5%, MoS 2 Powder: 1.5%.

[0045] 1) Weigh raw materials: Weigh Cu powder by mass percentage: 63%, Fe powder: 10%, high-carbon ferrochrome powder: 4%, MoAl 0.97 Si 0.03 B powder: 4%, graphite powder: 7.5%, MoS 2 Powder: 1.5%, of which the purity of Cu powder, Fe powder and high-carbon ferrochrome powder is 99.5%, and the particle size is 82.5um; MoAl 0.97 Si 0.03 The purity of powder B is 99.4%, and the particle size is 120um; MoS 2 The purity of powder and graphite powder is 99.7%, and the particle size is 91um.

[0046] 2) Mixing: the prepared raw material powder Cu powder, Fe powder, high carbon ferrochrome powder, MoAl 0.97 Si 0.03 B powder, graphite powder and MoS 2 The powder is mixed by a thre...

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Abstract

The invention provides a reinforced high-speed train brake pad material and a preparation method thereof. The reinforced high-speed train brake pad material comprises the following components of, in percentage by mass, 65% of Cu powder, 8% of Fe powder, 7% of high-carbon ferrochrome powder, 7% of MoAl < 0.97 > Si < 0.03 > B powder, 2% of graphite powder, and 2% of MoS2 powder; and the particle size of the Cu powder, the particle size of the Fe powder and the particle size of the high-carbon ferrochrome powder are all smaller than 85 microns, the particle size range of the MoAl < 0.97 > Si < 0.03 > B powder is 90 microns-150 microns, and the particle size of the MoS2 powder and the particle size of the graphite powder are smaller than 95 microns. According to the reinforced high-speed train brake pad material, the MoAl < 0.97 > Si < 0.03 > B powder is added, so that a high-speed train brake pad which is relatively high in friction coefficient, stable in friction coefficient, low in abrasion loss and small in damage to a brake disc is obtained through preparation.

Description

technical field [0001] The application relates to the technical field, in particular to a reinforced high-speed train brake pad material and a preparation method thereof. Background technique [0002] Brake pads for high-speed trains are safety components of high-speed trains. Brake pad materials are required to have a high and stable friction coefficient. The friction coefficient does not change greatly with the operating speed, temperature, rain and snow environment, so the material needs to have excellent high temperature Stability and good self-lubricating properties. Copper-based friction materials have irreplaceable advantages in braking. However, as the speed of the train increases, the braking load gradually increases, and the kinetic energy and thermal shock generated during braking also greatly increase. The traditional friction components in the existing brake pads have high hardness and poor plasticity, and poor wettability with Cu or Cu alloy matrix, which red...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16D69/02C09K3/14
CPCF16D69/027F16D69/02C09K3/14F16D2200/0026F16D2200/0008F16D2200/0052F16D2200/0034F16D2200/0086
Inventor 叶宏煜金钟铃
Owner WUHAN WAN BANG LASER DIAMOND TOOLS