Cold drawn low carbon steel filament and method of manufacturing said filament
AssigneeNV Bekaert SA
InventorsJavier Del Rio Rodriguez, Dirk Meersschaut
Life of this patent
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Abstract
A steel filament adapted for the reinforcement of elastomer or for thermoplastic products has a carbon content ranging up to 0.20 per cent by weight. The steel filament is provided with a coating promoting the adhesion with elastomer or thermoplastic products. The steel filament is drawn until a final diameter of less than 0.60 mm and a final tensile strength of more than 1200 MPa. Intermediate heat treatments are avoided so that the carbon footprint of the steel filament is substantially reduced.
Claims13
A steel filament adapted for the reinforcement of elastomer products, said steel filament having a plain carbon composition with a carbon content ranging up to 0.20 per cent by weight,
- said steel filament being provided with a coating promoting the adhesion with elastomer products or with thermoplastic products,
- said steel filament being cold drawn until a final diameter of less than 0.60 mm, said steel filament having a final tensile strength of more than 1200 MPa.
A method for manufacturing a steel filament adapted for the reinforcement of elastomer products, said method comprising the following steps:
- a. providing a steel wire rod having a plain carbon composition with a carbon content up to 0.20 per cent by weight;
- b. drawing said steel wire rod directly to a steel wire with an intermediate diameter;
- thereby avoiding any intermediate heat treatments such as patenting;
- c. providing said steel filament with a coating promoting the adhesion with elastomer products;
- d. further drawing said coated steel wire to a steel filament with a final diameter below 0.60 mm and to a tensile strength exceeding 1200 MPa.
(canceled)
Dependencies are inferred from the claim text.