Abstract:
Tire (100) comprising at least one structural element including at least one metal cord comprising a plurality of elementary metal wires stranded together, each elementary metal wire being coated with at least one first metal coating layer, said metal cord being coated with at least one second metal coating layer, wherein said at least one second metal coating layer has a nominal thickness higher than or equal to 30 nm, preferably of from 50 nm to 120 nm, more preferably of from 70 nm to 100 nm.
Abstract:
Tyre (100) for vehicle wheels comprises a belt structure (106) comprising at least one reinforcing layer having a plurality of reinforcing cords (10), wherein each reinforcing cord (10) comprises a first metallic wire (11) having a first diameter and a second metallic wire (12) having a second diameter greater than the first diameter, wherein the first wire (11) is substantially straight and the second wire (12) is helically wound around the first wire (11) with a predetermined winding pitch (P).
Abstract:
The present invention relates to a process for manufacturing a metal wire comprising a steel core and a metal coating layer in a radially outer position with respect to said steel core. The metal coating layer comprises an alloy of at least two metal components. The process comprises the steps of coating the steel core by depositing onto the steel core separate layers of the two metal components, each layer having a thickness not higher than 50 nm, and drawing the coated core to form the alloy of said at least two metal components. Preferably, the deposition step is carried out by means of a plasma deposition technique.
Abstract:
The present invention relates to a method and an apparatus for producing a steel wire for reinforcing an elastomeric material. The steel wire comprises a metal core (5) and a coating layer made of a metal alloy material having a composition including at least one first metal component and at least one second metal component. According to the invention, the method comprises the steps of: a) conveying the steel core (5) along a predetermined path in a substantially continuous manner; b) co-sputtering at least one first powered cathode (1; 1',1') made of said first metal component and at least one second powered cathode (2; 2',2') made of said second metal component onto the steel core being moved along said predetermined path to obtain a coating layer made of a metal alloy material of a first composition; and c) adjusting the power provided to at least one of said first (1; 1',1') and second cathode (2; 2',2') to obtain a coating layer made of a metal alloy material of a second composition.