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Influence of coiling conditions on IF steel properties

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Mechanical properties and structure of interstitial free (IF) steel in dependence on hot rolling conditions and coiling conditions are given. The influence of finished hot rolling conditions over temperature Ar3 (austenitic rolling), finished hot rolling conditions below temperature Ar1 (ferritic rolling) and coiling temperature are described. The tools of process controlling (deformations, temperatures, strain rate, time) for recrystallization, precipitation and phase transformation are discussed. Graphical dependences of mechanical properties and ferritic grain size on coiling temperatures are shown. The best processes conditions from point of view obtain of mechanical properties in class SEDDQ (super extra deep draw quality) in hot rolled strip are concluded. W artykule przedstawi[...]

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