Friction piece in a lubricated medium, working at contact pressures higher than 200 MPa

摘要

Friction part in a lubricated medium working at contact pressures above 200 MPa and having a contact surface that is textured and subjected, before or after texturizing, to a case hardening treatment for a tribological function, wherein the surface is subjected to operations for producing a periodic network of micrometric cavities having predefined shapes and sizes and a period adapted to the width of the contact surface in order to promote passage to elastohydrodynamic lubrication regime.

主权项

1. Friction part in a lubricated medium operating at contact pressures above 200 MPa and having a contact surface comprising a textured layer of deposited hard material, wherein said surface has a periodic network of micrometric cavities having a maximum length between 5 and 500 μm, a period less than half of a width of the contact surface, and a depth that is less than a thickness of said layer, correlated to a thickness of an employed lubricant so as to optimize reduction of friction coefficient and less than or equal to 3 μm, at elastohydrodynamic lubrication regime.