FRICTION MATERIAL COMPOSITE FOR FRICTION CLUTCH OF SWITCH ACTUATOR Russian patent published in 2017 - IPC C22C33/02 C22C38/16 B22F3/12 B22F7/00 

FIELD: chemistry.

SUBSTANCE: material contains 2-5.0 wt % of silicon oxide, 2-5 wt % of graphite, 10.5-17.5 wt % copper, 2.0-5.2 wt % barite and iron-rest. The material has an open porosity of 15-20%, is saturated with oil, Brinell hardness HB is not less than 600 Mpa, density - 5.45-5.85 g/cm³, the relative sediment not less than 12% and oil consumption - 1-4%. Iron material matrix has coarse-grained structure with a grain size of 10-180 mcm, not less than 70% of which is within 25-75 mcm, consists of granular perlite with inclusions of up to 20% of plate perlite and ferrite, has intercrystalline and intracrystalline porosity, grain boundaries distributed inclusions of graphite, silicon oxides, sulphides, copper and cementite as torn mesh and copper is distributed across the border inside the grains and beans.

EFFECT: increasing of wear resistance of friction material and greater stability coefficient of friction when loading conditions change.

8 dwg