Process for manufacturing pearlitic steel wire and product made thereby
AssigneeNV Bekaert SA
InventorPaul Dambre
Life of this patent
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Abstract
A process for manufacturing pearlitic steel wire, particularly with fine diameters and for use in reinforcing rubber vehicle tires. The wire is subjected to a patenting treatment before being drawn down to its final diameter, but is held at the transformation temperature for no more tha 5 seconds after transformation has taken place. Such a step renders the wire capable of being subjected to true strains of more than 3.0 and achieving tensile strengths of 3000 Nmm.sup.-2 or more. The wire may be cooled from the transformation temperature via a first stage in which the temperature is reduced to 400.degree. to 450.degree. C. over a period of time not less than 3 seconds.
Claims39
A process for producing a pearlitic steel wire, said process comprising the steps of subjecting the wire to a patenting operation in which it undergoes transformation in a transformation temperature range and of drawing the patented steel wire to a smaller diameter, characterized in that during the patenting operation the wire is held in the transformation temperature range during a retention time of no more than five seconds after transformation has been completed and in that the smaller diameter corresponds to a true strain of more than 3.
Dependencies are inferred from the claim text.