Friction material classification of clutch friction materials
1. Classification of friction materials
According to the different medium used by friction materials, we usually divide friction materials into wet and dry two kinds, in simple terms, dry is the friction material working in the air, the common is the so-called dry clutch disc. Dry friction sheet according to the main use of different materials, can be roughly divided into the so-called organic friction materials and powder metallurgy friction materials (also known as ceramic friction materials), of which the organic sheet is based on organic polymer compounds as a binder; The powder metallurgy friction plate is characterized by the use of sintering processing without organic binders.
The wet type is that the friction material works in various oils, such as the friction material on the synchronizer is soaked in the transmission oil, and the clutch of the automatic transmission is also working in the ATF oil. At present, paper-based friction sheet has the advantage of lower cost, but still presents excellent performance, so it is more and more widely used. Moreover, this is also one of the current shortcomings in China, and it is also one of the biggest obstacles to the localization of automatic transmissions. The picture below shows the latest generation of BorgWarner wet friction pads used in Ford's new 10-speed transmission, and it is truly high-tech.
