Technique for controlling hot rolling rod bundle surface iron scale

Abstract

The invention relates to a technique for controlling hot rolling wire rod surface iron scale which is used to control silk-producing high-carbon steel hot rolling wire rod surface iron scale through adopting a mechanical descaling method or a mechanical descaling plus pickling descaling method. The technique is characterized in that the thickness and the structure of the hot rolling wire rod surface iron scale are controlled through controlling the Stelmor cooling process flow and in particular comprises: closing a final rolling rear water tank, regulating the water content of the final rolling rear water tank to increase the spinning temperature, increasing the high temperature oxidation time after spinning, rear-moving a phase transformation zone, enlarging the water content of a draught fan after a Stelmor air-cooled wire is phase-transformed to accelerate the cooling speed, and effectively increasing the specific gravity of Feo in the hot rolling wire rod surface iron scale. The technique of the invention effectively increase the thickness of the hot rolling wire rod surface iron scale, increased the specific gravity of Feo in iron scale,and improving the structure of the iron scale through controlling the Stelmor cooling process flow, which is convenient for de-scaling the silk-producing high-carbon steel hot rolling wire rod surface iron scale through the mechanical descaling method or the mechanical descaling plus pickling descaling method.

Description

technical field [0001] The invention is applied to hot-rolled wire rods of high-carbon steels for wire making, and specifically relates to a technology for controlling the oxide scale on the surface of hot-rolled wire rods. Background technique [0002] Hot-rolled high-carbon steel wire rods for wire production, especially bead steel, cord steel and other fine wire products, must undergo mechanical peeling and descaling and on-line pickling before drawing to remove surface oxide scale. If the descaling is not clean, due to the hard and brittle iron oxide scale, it will cause damage to the surface of the steel wire and aggravate the wear of the die during drawing, which will affect the life of the wire drawing die, and more seriously, it will cause broken wires in subsequent processing. Therefore, the iron oxide scale on the surface of the wire rod should be easy to peel and pickle mechanically. The iron oxide scale produced by ordinary methods on the surface of hot-rolled w...

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the shortcoming that the iron oxide scale on the surface of the high-carbon steel hot-rolled wire rod for wire making is not easy to be mechanically peeled off and pickled, and provides a technology, which mainly increases the thickness of the oxide scale (up to 10 μm) and controls the structure of the oxide scale to obtain Iron oxide scale on the surface of hot-rolled wire rod for mechanical peeling

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