Reinforcements
AssigneeN. V. Bekaert S.A.
InventorWilly Tournoy
Life of this patent
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Abstract
This invention relates to high carbon steel wire or cord suitable for use as a reinforcement for vehicle tires. By "high carbon steel" is meant here a steel of at least 0.2% C.
Claims12
A high carbon steel cord for reinforcement of vehicle tires, characterized in that it comprises a number of wires having a substantially martensitic crystal structure of an elongation ability ranging between 3 and 10%.
Vehicle tire including high carbon steel cord as a reinforcement, characterized in that said cord is made of steel having a substantially martensitic crystal structure of an elongation ability ranging between 3 and 10%.
A method of making steel wire for reinforcement in vehicle tires, the method comprising heat treating a high carbon steel wire whereby an austenitic wire is formed, rapidly quenching the austenitic wire to a substantially martensitic structure, and annealing the substantially martensitic wire to provide it with an elongation ability of from 3 to 10%.
A method for making steel cord for reinforcement in vehicle tires, the method comprising bundling to cord a number of high carbon steel wires, heat treating the cord whereby austenitic cord is formed, rapidly quenching the austenitic cord to a substantially martensite structure and annealing the substantially martensitic cord to provide it with an elongation ability of from 3 to 10%.
A high carbon steel wire or cord for reinforcement of vehicle tires, characterized in that said high carbon steel has a substantially martensitic crystal structure of an elongation ability ranging between 3 and 10%.
Dependencies are inferred from the claim text.