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Production Of Api X60 And X70 Grade Steel Plates By Thermomechanical Controlled Rolling

BROWSE_DETAIL_CREATION_DATE: 15-08-2018

BROWSE_DETAIL_IDENTIFIER_SECTION

BROWSE_DETAIL_TYPE: Thesis

BROWSE_DETAIL_SUB_TYPE: Masters

BROWSE_DETAIL_PUBLISH_STATE: Unpublished

BROWSE_DETAIL_FORMAT: PDF Document

BROWSE_DETAIL_LANG: English

BROWSE_DETAIL_SUBJECTS: Metal manufactures. Metalworking,

BROWSE_DETAIL_CREATORS: Güneş, Seren (Author),

BROWSE_DETAIL_CONTRIBUTERS: Konca, Erkan (Advisor),

BROWSE_DETAIL_TAB_KEYWORDS

Thermomechanical controlled rolling, Thermomechanical controlled processing, Production of steel plates, API X60, API X70, Accelerated cooling 


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This 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. 


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