Introduction to the application of friction materials
Asbestos materials are widely used as friction materials for automobile brake pads. Although its load-bearing capacity is not as good as that of powder metallurgy materials, it has a high friction coefficient and close dynamic and static friction coefficients, which can make braking stable, low noise, and low price.
It can work normally under high load and high temperature, and is especially known for its stable friction coefficient and good wear resistance. Therefore, it is used as brake pads for aircraft landing, ball screw friction plates for heavy loads, and clutch plates for electric mechanisms.
In transportation machinery such as automobiles, ships, trains, large and medium-sized construction machinery such as bulldozers, mine elevators, excavators and tractors, agricultural machinery, and light industrial machinery, various specifications and types of powder metallurgy friction discs, brake pads, etc. In addition to excellent completion of clutch and braking, it can also reduce energy consumption and improve transmission accuracy. With the development of modern technology, the demand for high-performance friction materials has become more urgent.
The carbon-carbon composite material that appeared in the late 1970s is a promising friction material. It has stable high-temperature friction performance, long life, and light weight. It has been successfully used in the braking devices of Concorde and Boeing aircraft. It's just that the price is expensive, which affects the wide range of applications. Graphite-based friction material with good performance under medium load, low temperature and wet friction conditions is also a new type of material with great development prospects. It has almost all the advantages of asbestos and powder metallurgy materials at present, and the price is cheap, and it is an ideal friction material.