Depending on the braking conditions, improving the graphite structure in the intrinsic organization of the cast iron can reduce the stress concentration phenomenon and prevent the occurrence and expansion of cracks. By

High-speed braking surface temperature of the friction payment is very high, the material should be high-temperature mechanical properties, thermal conductivity, low modulus of elasticity and coefficient of expansion, so that the

Braking heat quickly dissipate to reduce the deformation of the disc body, in addition, the material should have high thermal fatigue strength to improve its life. On the basis of the development and production application of brake discs for speeding buses, we have developed a series of brake discs for buses.

On the basis of speed bus brake disc development and production applications, adjust the chemical composition of creep cast iron, add alloying elements, and its mechanical properties, physical properties, high-temperature mechanical properties and tensile, hot and cold fatigue and other properties carried out a large number of tests. On this basis, the friction performance and braking performance test, synthesize and analyze the results of various tests.

Analyzed the results of various tests, and finally chose a better mechanical properties at room temperature and high temperature, smaller coefficient of thermal expansion, higher coefficient of thermal conductivity and casting

Good process performance, easy to optimize the process and mass production of peristaltic cast iron as the disk material.