Department of Metallurgical and Materials Engineering
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Browsing Department of Metallurgical and Materials Engineering by Author "Güneş, Seren"
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Item PRODUCTION OF API X60 AND X70 GRADE STEEL PLATES BY THERMOMECHANICAL CONTROLLED ROLLING(2022-02-22) Güneş, Seren; KONCA, ErkanThis study was undertaken as an initial work to determine the rolling and cooling conditions for the production of API PSL2 X60M and X70M grade steels plates. Two full size Nb-Ti-V microalloyed steel slabs of 200 mm thickness with compositions compliant to the API specification were sliced into 14 small size slabs and these small slabs were subjected to different thermomechanical controlled rolling and accelerated cooling operations to produce 20 mm thick plates. Specifically, the effects of i) finish rolling temperature, ii) partitioning of the total reduction between the rough and finish rolling phases, and iii) accelerated cooling using water shower were studied. Mechanical tests (tensile, impact and drop weight tear test-DWTT) and metallographic examinations of the samples taken from the trial production plates were done. The conditions that could produce fine grained ferritic microstructures with mechanical properties satisfying the API PSL 2 requirements for API X60 steel plates solely by controlled rolling were determined. On the other hand, the use of accelerated cooling in addition to controlled rolling was required for the production of API X70 grade steel plates.