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High-speed train brake disc material with stable friction coefficient and preparation method thereof

A high-speed train, friction coefficient technology, applied in the direction of brake discs, brake types, brake components, etc., can solve the problems of insufficient friction stability, high low temperature brittleness tendency, etc.

Active Publication Date: 2021-04-09
NANJING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is that the present invention provides a train brake disc material that can solve the problems of insufficient frictional stability of the brake disc of high-speed trains and high tendency of low-temperature brittleness

Method used

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  • High-speed train brake disc material with stable friction coefficient and preparation method thereof
  • High-speed train brake disc material with stable friction coefficient and preparation method thereof
  • High-speed train brake disc material with stable friction coefficient and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Such as figure 1 As shown, a high-speed train brake disc material with a stable friction coefficient, in terms of mass percentage, its raw materials and proportioning are as follows:

[0036]

[0037] A preparation method of a high-speed train brake disc material with a stable coefficient of friction, comprising the following steps:

[0038] S1. Proportion the brake disc elements according to the above composition requirements, and add them into the electric furnace to heat to 1580°C to fully melt them to obtain molten steel;

[0039] S2. Adding a nucleating agent to fully molten molten steel, followed by casting into an ingot;

[0040] S3. Forging is carried out by multi-directional die forging to obtain a forging billet;

[0041] S4. The obtained forged billet is subjected to three-stage performance heat treatment of normalizing-quenching-tempering, that is, the obtained high-stable train brake disc material.

[0042] The high-speed train brake disc material wit...

Embodiment 2

[0053] A high-speed train brake disc material with a stable coefficient of friction, in terms of mass percentage, its raw materials and proportions are as follows:

[0054]

[0055] A preparation method of a high-speed train brake disc material with a stable coefficient of friction, comprising the following steps:

[0056] S1. Proportion the elements of the brake disc according to the above composition requirements, and add it into the electric furnace to heat it to 1690°C to fully melt it to obtain molten steel;

[0057] S2. Adding a nucleating agent to fully molten molten steel, followed by casting into an ingot;

[0058] S3. Forging is carried out by multi-directional die forging to obtain a forging billet;

[0059] S4. The obtained forged billet is subjected to three-stage performance heat treatment of normalizing-quenching-tempering, that is, the obtained high-stable train brake disc material.

[0060] The high-speed train brake disc material with a stable friction c...

Embodiment 3

[0071] The difference between this embodiment and embodiment 1 is only:

[0072] A high-speed train brake disc material with a stable friction coefficient, its raw materials and proportions are as follows: C: 0.25%; Si: 0.25%; Mn: 0.83%; V: 0.30%; Cr: 1.68% ; Ni: 1.96%; Mo: 0.25%; Cu: 0.50%; P: 0.008%; S: 0.006%; Al: 3.50%;

[0073] A preparation method of a high-speed train brake disc material with a stable coefficient of friction, the Fe 3 The particle size range of the Al ultrafine phase is 5-15 μm.

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Abstract

The invention discloses a high-speed train brake disc material with a stable friction coefficient. The raw materials and the ratio are as follows: C: 0.20-0.35%; Si: 0.21-0.31%; Mn: 0.68-1.19%; V: 0.18-0.42 %; Cr: 1.07-2.54%; Ni: 0.89-2.33%; Mo: 0.17-0.39%; Cu: 0.12-0.75%; P: 0.005-0.01%; ; Fe: margin. The invention also discloses a preparation method of the high-speed train brake disc material with stable friction coefficient. In the structure of the brake disc material of the present invention, there is Fe dispersed in the grain 3 Al ultrafine phase, Fe 3 The Al ultrafine phase has a low thermal expansion coefficient and high hardness, and its friction performance does not cause fluctuations in friction performance with changes in braking conditions such as friction temperature, so that the friction disc has a stable friction coefficient during the braking process.

Description

technical field [0001] The invention relates to a high-speed train brake disc material with stable friction coefficient and a preparation method thereof, belonging to the technical field of friction materials for high-speed train braking. Background technique [0002] With the rapid development of the national economy, my country's high-speed railway industry has developed rapidly, covering 28 provinces and more than 160 cities above the prefecture level. The "four vertical and four horizontal" main lines have basically taken shape, and the operating mileage of high-speed rail ranks first in the world's high-speed rail mileage list. In July 2016, the National Development and Reform Commission, the Ministry of Communications, and China Railway Corporation jointly issued the "Medium and Long-Term Railway Network Plan" (2016-2030), which clearly pointed out that the "eight vertical and eight horizontal" high-speed railway transportation network in the country is expected to In ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/42C22C38/44C22C38/46F16D65/12B21J5/00B21J5/02B22D27/20B22F1/00B22F9/04
CPCC22C38/02C22C38/04C22C38/46C22C38/44C22C38/42C22C38/06B21J5/002B21J5/02F16D65/125B22F9/04B22D27/20F16D2200/0008F16D2200/0082B22F2009/041B22F1/145
Inventor 张保森王章忠巨佳陶学伟巴志新朱帅帅张超
Owner NANJING INST OF TECH
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