Jodi a, otomobil fren manifaktirè pad pale sou pwoblèm yo komen nan materyèl semi-metal nan kousinen fren.

Premye pwoblèm nan materyèl friksyon:

1. Bri, osilasyon ak brutality tou senpleman lakòz bri frekans ki ba, akonpaye pa osilasyon vyolan nan kò a.

3. kontni an metal segondè fè tanperati a ki ba ak ba vitès frenaj mank fòs, ki tou senpleman lakòz fatig pedal.

Volim pousantaj se yon inite trè kòrèk pou mezire materyèl friksyon. Formulation engineers should take the initiative to understand the fundamental properties of various raw materials (density, particle size, hardness, moisture, chemical composition, elastic modulus), but also should clearly understand the effects of various friction materials on the micro and macro functions of materyèl friksyon. Koulye a, dapre konpreyansyon nan manifaktirè otomobil pad fren, pi fò tès konsepsyon fòmil yo baze sou rapò a eleman. In order to avoid the lack of fundamental data on the function of the raw material, it is theoretically difficult to express the connection between the number of ingredients in the formula and the conflicting functions in a simple and clear formula, such as mixing time, pressure time, pressure pressure, holding time and degassing time, grinding method, two layers of material, data and other factors can affect the braking function anytime and anywhere during the braking process. As regards the formulation itself, it is not correct to determine the proportions of the various ingredients by theoretical means, nor can we quickly derive direct quantitative links between the formulation and the function, which depend primarily on accumulated experience over a long period of time.