Processing wire rod
AssigneeCentre de Recherches Metallurgiques-Centrum voor Research in de Metallurgie
InventorMario Economopoulos
Life of this patent
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Abstract
Steel wire rod leaving the last stand of a rolling mill is quenched to between 850.degree. C and a temperature corresponding to the nose of the curve representing the start of the transformation of austenite to ferrite-pearlite plotted with respect to time and temperature. The wire rod is then subjected to a second cooling while in the form of loose turns passing along a given path. The variation of the temperature of the wire rod along this path is observed, and the position is detected at which a temperature increase occurs owing to recalescence. At this position the wire rod is subjected to supplementary cooling.
Claims5
In a method of processing steel wire rod leaving the last stand of a rolling mill, comprising the sequential steps of rapidly cooling the wire rod down to between 850.degree. C. and a temperature corresponding to the nose of the curve representing the start of transformation of austenite to ferrite-pearlite in a diagram in which curves representing the start and finish of transformations in the steel are plotted with respect to time and temperature, and subjecting the wire rod to a second cooling while the rod is in the form of loose turns passing along a given path, during which second cooling the steel completely transforms from austenite to ferrite-pearlite, the improvement comprising observing the variation of the temperature of the wire rod along the given path, detecting the position at which a temperature increase occurs owing to recalescence, and subjecting the wire rod to localized supplementary cooling at the position.
Dependencies are inferred from the claim text.