SINTERED POWDER FRICTION MATERIAL FOR FRICTION DISCS OF GEARBOX COUPLING OF ELECTRIC POINT MACHINE Russian patent published in 2021 - IPC B22F5/10 B22F3/16 C22C33/02 F16D13/52 

FIELD: powder metallurgy.

SUBSTANCE: invention relates to powder metallurgy, in particular to friction materials operating under conditions of dry friction for friction discs of a gearbox coupling of an electric point machine. Sintered powder friction material for friction discs of the gearbox coupling of the electric point machine based on iron contains components at the following ratio, wt. fraction %: chromium-doped iron powder (PC-30) 5-8, graphite powder 4-6, bronze powder 9-12, lead powder 13-17, iron powder is for the rest.

EFFECT: material is provided that has high stability of a friction coefficient, as well as low wear when changing temperature and humidity of environment during operation of the electric point machine.

1 cl, 2 tbl