|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Applications of Process Engineering Principles in Materials Processing, Energy and Environmental Technologies: An EPD Symposium in Honor of Professor Ramana G. Reddy
||Effects of Mg on the Microstructure and Mechanical Properties of EH36 Shipbuilding Steel
||Xiaodong Zou, Dapeng Zhao, Cong Wang
|On-Site Speaker (Planned)
Recently, high heat input welding methods have gained engineering applications. However, increasing welding heat input usually leads to significant coarsening of austenite grains and formation of brittle microstructures, resulting in the reduced toughness of HAZ. It is expected to utilize oxide metallurgy to solve the problem by controlling the formation of fine inclusions. In prior studies, few studies focus on the evolution of microstructure during the whole process of steelmaking. For guiding industrial production, effects of 7ppm Mg on the evolution behavior of inclusions and microstructure in the EH36 ship steel after casting, rolling and welding are investigated. It is found that a large amount of fine inclusions are generated in the slab and plate after Mg addition, which refine the microstructure. After welding thermal simulation, it is found that in the heat input of 120kJ/cm Mg addition promotes nucleation of acicular ferrite, resulting in improved toughness of HAZ.
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