Friction unit for high-speed train brake pad and preparation method thereof

A friction unit and friction body technology, applied in friction linings, chemical instruments and methods, mechanical equipment, etc., can solve the problems of easy separation, low bonding strength between back plate and friction body, etc.

Active Publication Date: 2020-11-13
山东百德瑞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

[0004] The purpose of the present invention is to provide a friction unit for high-speed train brake pads and a preparation method thereof. The friction unit can overcome the disadvantages of the existing friction unit that the back plate and the friction body are easily separated due to the low bonding strength, and improve the efficiency of the friction unit. The service life of the powder metallurgy brake pads made of the friction unit is extended, and the copper plating process of the support back plate is also omitted, making the entire manufacturing process more environmentally friendly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] The mass percentage composition of the metal powder of the pressed and sintered powder metallurgy back plate used in this embodiment is as follows:

[0068] Iron powder 95%; copper powder 1%; nickel powder 3.5%; graphite powder 0.5%.

[0069] The mass percent composition of the metal powder used in this embodiment to press the melt-infiltrated layer is as follows:

[0070] 90% copper-tin alloy; 6% iron-copper alloy; 4% nickel.

[0071] The mass percent composition of the metal powder used to press the friction body in this embodiment is as follows:

[0072] Cu 53%; Fe 15%; MoS 2 3%; Tungsten Carbide 2%; Graphite 18%; Iron Chromium 8%; Aluminum Oxide 1%.

[0073] Prepare the friction unit for high-speed train brake pads according to the following steps:

[0074] Step 1. Three-dimensionally mix the friction body powder according to the ratio. The mixing time is 8 hours. Put the mixed material into the mold cavity of an automatic molding press with constant volume and...

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Abstract

The invention discloses a friction unit for a high-speed train brake pad and a preparation method thereof. The friction unit comprises a powder metallurgy back plate, a fusing and seeping layer and afriction body which are sequentially sintered into a whole. The fusing and seeping layer is combined with the powder metallurgy back plate and the friction body together in a metallurgy manner after being mutually fused with the powder metallurgy back plate and the friction body. The powder metallurgy back plate is formed by sintering metal powder I in a pressing manner. The fusing and seeping layer is formed by pressing metal powder II. The friction body is formed by pressing metal powder III. According to the friction unit, the fusing and seeping layer forms solid fused alloy completely withthe powder metallurgy back plate and the friction body, prevents corrosion for plating, fusing and seeping of the powder metallurgy back plate and has the function of bonding between the back plate and the friction body. The powder metallurgy back plate is formed by sintering an iron-based material in a pressing manner. In the sintering process, by means of the fusing and seeping layer, the powder metallurgy back plate and the friction body are bonded together, fusing, seeping and copper plating treatment is carried out on the powder metallurgy back plate, and the anti-corrosion function is achieved.

Description

technical field [0001] The invention relates to a friction unit for a high-speed train brake pad and a preparation method thereof, and relates to the technical field of high-speed train brake pads. Background technique [0002] Rail transit is a technical field that the country focuses on development, and high-speed trains are the main artery of the national economy and a popular means of transportation. With the maturity of China's rail transit technology, the number of high-speed rail and bullet trains used in the market is also increasing. In order to ensure the safe operation of high-speed trains, a stable and good braking system is essential. Brake pads are the key components and consumable parts of the braking system of high-speed trains. As the speed of high-speed trains continues to increase, the braking energy of trains also increases significantly, so the brake pads are required to have higher physical properties and more stable friction performance. [0003] Du...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16D69/02C09K3/14
Inventor 王震宁
Owner 山东百德瑞轨道交通科技有限公司
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