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Modification of textural distribution in hot-rolled stainless steels using asymmetric hot-rolling techniques
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The main aim of this project was to investigate the effect of asymmetric hot rolling on the microstructural and textural distribution in hot-rolled strip and on the final properties of stainless steels, as a possible solution to the ridging problem for ferritic grades, and for improving deep drawability of the material. The study focused on the EN 1.4016 (AISI 430) and on EN 1.4512 (AISI 409) ferritic stainless steels and on EN 1.4301 (AISI 304) austenitic stainless steel. Results show that after asymmetric hot rolling a greater recrystallised structure can be detected in all the materials. From the textural angle especially, samples show a better homogenised structure. After cold rolling and final annealing, bands of grains with similar orientations causing roping phenomenon, tend to disappear when the final product has been previously asymmetrically hot-rolled. Decreasing the grain size of the hot band in the asymmetric hot-rolling process drops the 'grain banding' on the final product. The mechanical properties of these materials show that asymmetric hot rolling can have a beneficial effect both on the strength and elongation for the EN1.4512 ferritic grade and the EN1.4301 austenitic grade. Analysis of the hot-rolling data shows that the asymmetric rolling leads to a clear reduction in rolling force, rolling torque and total motor current, showing that asymmetric rolling also has technological advantages.
Book Details
Authors
European Commission and Directorate General for Research
Series
Research Fund for Coal and Steel
Publishers
Publication year : 2010
License: All rights reserved ©
Times read: 1
