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Effect of Electromagnetic Stirring on the Microstructure and Properties of Fe-Cr-Co Steel

Key Laboratory of Electromagnetic Processing of Materials (Ministry of Education), Northeastern University, Wenhua Road, Shenyang 110819, China
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Materials 2018, 11(8), 1437; https://doi.org/10.3390/ma11081437
Received: 6 August 2018 / Revised: 9 August 2018 / Accepted: 10 August 2018 / Published: 14 August 2018
High chromium steel has been synthesized by an induction furnace adopting electromagnetic stirring (EMS). Varying amounts of cobalt was added to obtain 3, 6, and 12% Co in the steel. The melt was allowed to solidify with or without EMS in a rotary magnetic field. The effects of the varying cobalt content and the stirring have been characterized by the microstructural evolution and the consequent improvement in mechanical properties. The application of a rotary EMS during solidification has shown a significant effect on the grain refining, the reduction of element segregation, the promotion of eutectic volume fraction, and the consequent improvement of mechanical properties, including hardness and high-temperature strength. The formation mechanism of the eutectic structure and the precipitation of M7C3 and M23C6 carbides was discussed according to the calculated phase diagram. The increment of cobalt content improved the eutectic volume fraction. Cobalt addition also enhanced the hardness and the yield tensile strength, provided that the ingot structure was homogenized by the EMS. View Full-Text
Keywords: high chromium steel; electromagnetic stirring; microstructure; hardness; tensile strength high chromium steel; electromagnetic stirring; microstructure; hardness; tensile strength
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Zhang, L.; Hou, Y.; Guo, X.; Xiang, Z.; Wang, E. Effect of Electromagnetic Stirring on the Microstructure and Properties of Fe-Cr-Co Steel. Materials 2018, 11, 1437.

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