Research on Laser Cladding and Friction Characteristics of Copper-based Powder Metallurgy Friction Materials
Aiming at the problems of high wear rate and friction layer fell off due to insufficient bonding stability of clutch friction plate formed by traditional sintering and pressing,the laser cladding process was used to prepare the cladding layer of the copper-based powder metallurgy friction materials by using Laserline LDF 6000-100 semiconductor laser.The prepared friction plate was tested and analyzed by SEM,and the friction performance and wear test were carried out by MM-3000 performance testing machine,and the friction characteristics of the wet clutch prepared by laser cladding process under typical working conditions were studied.The results show that the friction layer prepared by laser cladding technology has a dense structure,without obvious crack defects,and has good wear resistance.Compared with the sintering and pressing process,the wear rate of the friction plate reduces by 59.76%.The maximum slipping friction work under different engagement pressures increases with the increase of rotational speed.The friction torque can quickly reach the maximum value after the clutch is fully engaged,and the equivalent friction coefficient also reaches the extreme value at this time.
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