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Alloy material for brake disc of high-speed heavy haul train, preparation method thereof and brake disc

A technology of alloy materials and heavy-duty trains, applied in the direction of brake discs, brake types, brake components, etc., can solve the problems that restrict the development of aluminum alloy brake discs, the limited heat insulation performance of the wear-resistant layer, and affect the safety of trains, etc. , to achieve the effects of small thermal impact, good load-bearing effect and long service life

Active Publication Date: 2019-09-06
HUNAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, due to the limited heat insulation performance of the wear-resistant layer, frequent braking makes the temperature of the wear-resistant layer rise sharply, resulting in the expansion of the aluminum alloy matrix
The coefficient of thermal expansion of titanium is 10.8×10 -6 / k, the coefficient of thermal expansion of aluminum is 23.2×10 -6 / k, the difference is large, the thermal expansion coefficient mismatch between the wear-resistant layer and the aluminum alloy substrate will affect the bonding strength of the two, making the wear-resistant layer easy to fall off, affecting the safety of trains, and restricting the development of aluminum alloy brake discs

Method used

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  • Alloy material for brake disc of high-speed heavy haul train, preparation method thereof and brake disc
  • Alloy material for brake disc of high-speed heavy haul train, preparation method thereof and brake disc

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Embodiment 1

[0032] This embodiment provides a method for preparing alloy materials for brake discs of high-speed and heavy-duty trains, which specifically includes the following steps:

[0033] S1. Melting: heat Al to a liquid state and add Ti, Cu, Mn, and V master alloys in proportion at 850°C. The specific mass percentages are as follows: Ti: 3%, Cu: 2%, Mn: 0.3% , V: 1%, the balance is Al, stir continuously to form a liquid metal with uniform composition, and let it stand for 20 minutes;

[0034] S2. Refining: Into the liquid metal obtained in step S1, feed anhydrous high-purity nitrogen with a purity of 99.9% for refining for 60 minutes, add a slagging agent to the surface of the liquid metal, and remove slag after standing for 15 minutes to obtain an alloy melt;

[0035] S3. Spray forming: use aluminum alloy spray forming equipment to spray the alloy melt obtained in step S2 to prepare alloy materials for brake discs of high-speed and heavy-duty trains. The pressure of nitrogen is 2...

Embodiment 2

[0037] This embodiment provides a method for preparing alloy materials for brake discs of high-speed and heavy-duty trains, which specifically includes the following steps:

[0038] S1. Melting: heat Al to a liquid state and add Ti, Cu, Mn, and V master alloys in proportion at 800°C. The specific mass percentages are as follows: Ti: 5%, Cu: 4%, Mn: 0.5% , V: 1.2%, the balance is Al, stir continuously to form a liquid metal with uniform composition, and let it stand for 15 minutes;

[0039] S2. Refining: Into the liquid metal obtained in step S1, feed anhydrous high-purity nitrogen with a purity of 99.9% for refining for 45 minutes, add a slagging agent to the surface of the liquid metal, and remove slag after standing for 25 minutes to obtain an alloy melt;

[0040] S3. Spray forming: use aluminum alloy spray forming equipment to carry out spray forming to the alloy melt obtained in step S2, prepare the alloy material for brake disc of high-speed heavy-duty train, the pressur...

Embodiment 3

[0042] This embodiment provides a method for preparing alloy materials for brake discs of high-speed and heavy-duty trains, which specifically includes the following steps:

[0043] S1. Melting: heat Al to a liquid state and add Ti, Cu, Mn, and V master alloys in proportion at 750°C. The specific mass percentages are as follows: Ti: 2%, Cu: 4%, Mn: 0.8% , V: 1.5%, the balance is Al, stir continuously to form a liquid metal with uniform composition, and let it stand for 15 minutes;

[0044] S2. Refining: Pass into the liquid metal obtained in step S1 anhydrous high-purity nitrogen with a purity of 99.9% for refining, the time is 40 minutes, add a slag-removing agent to the surface of the liquid metal, and remove the slag after standing for 20 minutes to obtain an alloy melt;

[0045] S3. Spray forming: use aluminum alloy spray forming equipment to spray the alloy melt obtained in step S2 to prepare alloy materials for brake discs of high-speed and heavy-duty trains. The pressure...

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Abstract

The invention discloses an alloy material for a brake disc of a high-speed heavy haul train, a preparation method thereof and a brake disc. The alloy material is prepared by melting, refining and spray-forming with Ti, Cu, Mn, V and Al as raw materials, and the alloy material can be applied to manufacturing a transition layer of the brake disc of the high-speed heavy haul train. The alloy materialprovided by the invention is high in strength, is good in toughness, and can be taken as the transition layer for bearing a base body and a wear-resisting layer of the brake disc. The base body and the wear-resisting layer of the manufactured brake disc of the high-speed heavy haul train are tightly combined, so that stable operation under a high-temperature condition and a low-temperature condition is achieved, theservice life is long, and brake performance is good. The alloy material for the brake disc of the high-speed heavy haul train disclosed by the invention can effectively promote popularization of the aluminum alloy brake disc, relieves the train weight, reduces energy consumption, and improves safety of train operation.

Description

technical field [0001] The invention relates to the field of materials for brake discs, in particular to an alloy material for brake discs of high-speed and heavy-duty trains, a preparation method and the brake disc. Background technique [0002] The brake disc is a component in the braking system that is used to generate braking force that hinders the movement or movement tendency of the vehicle. When it is working, it will be subjected to the normal force and tangential force exerted by the brake block. The maximum temperature on its surface can reach 800°C. Under the action of high temperature, it may be deformed, resulting in friction noise and scratches, which directly affects the reliability of train braking and operation safety. [0003] The traditional materials of brake discs are mainly cast iron and cast steel. With the continuous increase of environmental pressure, higher requirements for energy saving and emission reduction in various industries have become urgen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/03C22C1/06C22C21/00C22C21/12B22F3/115B33Y10/00B33Y80/00F16D65/12F16D69/02
CPCB22F3/115B33Y10/00B33Y80/00C22C1/026C22C1/03C22C1/06C22C21/003C22C21/12F16D65/125F16D69/027F16D2200/003
Inventor 范才河范语楠阳建君欧玲陈喜红陈刚
Owner HUNAN UNIV OF TECH
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