METHOD FOR PRODUCING A DUAL-PHASE STEEL STRIP IN A COMBINED CASTING AND ROLLING SYSTEM, A DUAL-PHASE STEEL STRIP PRODUCED BY MEANS OF THE METHOD, AND A COMBINED CASTING AND ROLLING SYSTEM
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United States of America
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Jan 9, 2025
app pub date -
Oct 19, 2022
filing date -
Oct 19, 2022
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Abstract
A method for producing a dual-phase steel strip in a system having a finish-rolling train with a first stand group that includes at least one first finish-rolling stand, and a second stand group that includes at least one stand cooler. The system has a cooling section that includes a first cooling section group and a second cooling section group. Immediately following finish-rolling of a finish-rolled strip, the finish-rolled strip is fed to the second stand group, and force-cooled to a second exit temperature (TA2) so that upon exiting the second stand group the strip has a predominantly austenitic structure. Once the force-cooling stops, a ferritic and austenitic structure forms in the finish-rolled strip during transport. The finish-rolled strip is force-cooled to a fourth exit temperature (TA4) in the second cooling section group so that, upon exiting, the finish-rolled strip has a dual-phase structure composed of martensite and ferrite.
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