Friction material, method of preparing same and friction lining

Details Friction material, method of preparing same and friction lining Friction material, method of preparing same and friction lining

F - Mech Eng,Light,Heat,Weapons

16

D

F16D 69/02 (2006.01) C22C 32/00 (2006.01)

Patent

CA 2265718

A friction material comprising a sintered mass of iron in which graphite particles are dispersed, which sintered mass is formed from between 13 and 22 vol.% of iron fibres, between 13 and 22 vol.% of iron particles having a particle size of 10-400 µm, between 40 and 70 vol.% of graphite particles having a particle size of 25-3000 µm, and between 10 and 15 vol.% of a metallic binder having a melting point of 800-1140 °C, and a method of preparing such a friction material, wherein a mixture of these components is compressed at a pressure of at least 100 MPa so as to form a compact having a desired form and size, and where the compact thus formed is sintered at a temperature between 800 and 1140 °C for a period of time which is sufficiently long for achieving concretion of iron fibres, iron particles and metallic binder.

Cette invention se rapporte à un matériau de friction comprenant une masse frittée de fer, dans laquelle sont dispersées des particules de graphite et qui renferme entre 13 et 22 % en volume de fibres de fer, entre 13 et 22 % en volume de particules de fer ayant une granulométrie allant de 10 à 400 mu m, entre 40 et 70 % en volume de particules de graphite ayant une granulométrie allant de 25 à 3000 mu m, et entre 10 et 15 % en volume d'un liant métallique ayant un point de fusion allant de 800 à 1140 DEG C, ainsi qu'à un procédé pour préparer un tel matériel de friction. Dans ce procédé, un mélange des constituants mentionnés ci-dessus est comprimé à une pression d'au moins 100 MPa, afin de former un bloc compact ayant une forme et des dimensions désirées, puis le bloc compact ainsi formé est fritté à une température comprise entre 800 et 1140 DEG C pendant une période suffisamment longue pour atteindre une compression des fibres de fer, des particules de fer et du liant métallique.

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