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Friction material

Author:admin     Date :2012/7/23 17:07:29     Popularity:
Made by the powder metallurgy method, composed of a material having a high coefficient of friction and high wear resistance of the metal and nonmetal, also known as the sintered friction material. This material is usually by the matrix metal (copper, iron, or alloys thereof), lubricating element (lead, graphite, molybdenum disulfide, etc.), the friction element (silica, asbestos, etc.) 3 parts. Its organizational features are: the various dot with special properties are evenly distributed in the continuous metal matrix. The metal matrix exhibit good thermal resistance and withstand mechanical stresses, uniform distribution of dots to ensure that the desired friction properties. Its advantages compared with traditional asbestos resin or metal friction materials, is a high coefficient of friction, the friction coefficient changes with changes in temperature, pressure and speed, high temperature resistance, seizure resistance, wear, long life . Be divided into two categories of copper-based and iron-based powder metallurgy friction material matrix component. The ratio of the iron group of copper-based slightly higher hardness, strength, coefficient of friction, is also higher than the instantaneous pressure and the surface temperature allowed to bear; than iron and copper-based group has a better thermal conductivity, corrosion resistance and small wear. In order to increase the strength of the material of the powder metallurgy friction, usually its bonding in the steel back and become a bimetallic structure. Most of the friction material used in the clutch, but also shows its unique advantages particularly in the wet clutch. The iron-based friction materials for brakes. Both materials have been widely used in aircraft, tanks, cars, ships, tractors, construction machinery and machine tools, such as the clutch or brake.