Increasing the strength class of rolled steel made of high-carbon steel in the stream of continuous wire mill
Journal Title: Metallurgical and Mining Industry - Year 2017, Vol 9, Issue 1
Abstract
The technology of deformation-thermal treatment of rolled steel that will ensure uniformity of distribution of the pearlite structure over the cross section, reduce the depth of decarbonized layer, increase the initial strength of the metal while improving ductility characteristics has been developed. The complete absence of water cooling stage of rolled steel after its output from the finishing wire rolling mills was the main peculiarity of the currently used cooling modes of rolled steel on Stelmor line. Cooling mode includes the following technological operations: the temperature of the end of rolling and output of rolled product from the wire block – at the level of 1050 ºС; cooling with water prior laying head is not performed; metal temperature at the laying head is 1030…1020 °С; accelerated air cooling of the wire rod turns up to temperatures of 560…540 °С when the heatinsulating caps are open; further cooling is when closed insulating caps to a temperature of ~150 °С. As a result of the industrial implementation of a fundamentally new approach to cooling of highcarbon rolled steel in a stream of high-speed continuous wire mill using the rolling heat heating, the best quality indicators of rolled steel with diameter of 10.0 mm were comprehensively achieved, which were previously considered unattainable.
Authors and Affiliations
E. V. Parusov, L. V. Sahura, S. I. Gubenko, A. B. Sychkov
Keywords
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