Powder metallurgy brake lining friction block for high-speed train and preparation method thereof

Abstract

The invention discloses a powder metallurgy brake lining friction block for a high-speed train and a preparation method thereof. The friction block comprises a copper-plated backboard and a friction body. A transition layer is further arranged between the copper-plated backboard and the friction body and metallurgically fused completely with the copper-plated backboard and the friction body. The copper-plated backboard is made from a Q345B material through copper plating. The transition layer is formed by mixing metal powder and copper powder and then sintering the mixed metal powder and copper powder. The copper-plated backboard and the friction body are spliced together through the transition layer during sintering. The friction block prepared through the method can overcome the defect that a backboard and a friction body of an existing friction block are low in splicing strength and consequently the backboard and the friction body are separated and prone to falling, and the service life of a powder metallurgy brake lining made of the friction block is prolonged.

Description

technical field [0001] The invention relates to the technical field of train brake pads, in particular to a powder metallurgy brake pad friction block for high-speed trains and a preparation method thereof. Background technique [0002] The railway is an important infrastructure of the country, the main artery of the national economy and a popular means of transportation. In order to meet the needs of my country's national economic construction, my country has actually operated high-speed EMUs. In order to ensure the safe operation of high-speed EMUs, it is necessary to have a stable and good braking system. In China, brake pads are the key components and consumable parts of the braking system of high-speed trains. With the continuous increase of the running speed of high-speed EMUs, the braking load of trains has also increased significantly. When braking, the brake pads must keep the train running The huge kinetic energy generated at the time is converted into heat energy...

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Problems solved by technology

[0004] The object of the present invention is to provide a powder metallurgy brake pad friction block for high-speed trains and its preparation method. The friction block prepared according to the method can overcome the separation of the back plate and the friction body due to the low bonding strength of the back plate and the friction body in the existing friction block. The disadvantage of easy falling off improves the service life of the powder metallurgy brake pad made of this friction block

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