Friction materials for high-speed train braking and method for preparing same

Abstract

The invention relates to a friction material used in express train brake and its method for preparing. The materials include rubber, gum cement, resin, friction-type mix, fibrous material and mineral filler. It is characterized in that the materials also include tripoly cyanoamine cyanurate, mineral filler, didymia rare-earth powdered ore, lanthanum chlor rare earth powdered ore, the proportion of the weight part of each component is: rubber of 5-10 parts,fibrous material of 8-13 parts, gum cement of 0.2-0.6 part, mineral filler of 2-7 parts,resin of 5-12 parts, tripoly cyanoamine cyanurate of 0.5-1 parts,and friction-type mix of 40-50 parts. The method for preparing includes preparing moulded materials, compression molding and after-treatment. The invention reduces the high-temperature degeneracy of the friction material because it has selected tripoly cyanoamine cyanurate which has self-lubricating property and is of good fire-retardancy as addition agent and improves the cooperating knife-bar among gasket materials because it has added rare-earth powdered ore. The method for preparing moulded materials adopting rubber-making technology is of simple technology and suitable for commercial manufacture, and is of zero environmental contamination, zero noise and nuisance free.

Description

1. Technical field: [0001] The invention relates to a friction material, in particular discloses a friction material for high-speed train braking with moderate friction coefficient, good wear resistance and good temperature resistance and a preparation method thereof. The friction material can be widely used in the manufacture of brake pads, brake pads, brake shoes, etc. in braking systems such as high-speed trains, urban rail transit, and subways. 2. Background technology: [0002] The train brake pad is one of the important parts of the whole brake device, it plays a vital role in the braking performance of the train, especially the disc brake pad of the high-speed train, not only requires it to have a stable high Friction coefficient, and it has good wear resistance and temperature resistance under high-speed braking and high friction conditions, and requires no damage to the brake disc and low braking noise. [0003] In 1998, my country's railway transportation speed in...

AI Technical Summary

Problems solved by technology

[0003] In 1998, my country's railway transportation speed increased to 160km / h. In the future, the running speed of my country's high-speed trains can be higher than 200km / h. However, the friction materials produced by my country have poor temperature resistance and serious performance degradation under high-speed braking. shortcoming

Chinese patents CN1690467A and CN1670113A disclose friction materials used in vehicles such as automobiles. The reinforcing agents used in these materials are various organic fibers, the matrix is ​​styrene-butadiene rubber or phenolic resin, and various friction-increasing agents, reducing Inorganic fillers such as abrasives, but the overall performance of the material is not ideal, and the wear resistance and temperature resistance cannot meet the operating conditions of high-speed and high-load high-speed trains

Chinese patent CN1206080A, world patent W08909889, DE4135389, etc. reported that the reinforcing agent of train friction material is also various fibers, and its matrix is ​​thermoplastic / thermosetting phenolic resin, rubber or rubber-plastic blending system, and silicates are added. A variety of inorganic fillers, but this type of friction material still has problems such as poor wear resistance and serious degradation of friction performance at high temperatures