Effect of Phase Solidification Sequence in Stainless Steel on Grain Refining Efficiency
Grain refinement of as-cast structure of Cr-Ni stainless steels was experimentally studied using heterogeneous nuclei. Refinement of primary grains was achieved in both cast ferritic and austenitic grades. However, imposing a mixed solidification sequence of FCC and BCC phases resulted in a macrostructure without a recognizable Columnar-to-Equiaxed Transition Zone (CET). Non-metallic inclusions in the casting were recorded using automated scanning electron microscopy/energy-dispersive x-ray spectroscopy method, and simulated with FACTSAGE thermodynamic software. In the discussion, the CFD simulated thermal gradient (G) and isotherm velocity (V) in the casting are plotted on Hunt’s map and compared to the experimental position of CET in different steels
D. Arvola et al., "Effect of Phase Solidification Sequence in Stainless Steel on Grain Refining Efficiency," Proceedings of The Iron & Steel Technology Conference and Exposition (2018, Philadelphia, PA), Association for Iron & Steel Technology (AIST), May 2018.
The Iron & Steel Technology Conference and Exposition, AISTech 2018 (2018: May 7-10, Philadelphia, PA)
Materials Science and Engineering
Peaslee Steel Manufacturing Research Center
Keywords and Phrases
Metallurgy; Steelmaking and Casting; Solidification
Article - Conference proceedings
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10 May 2018