The Microstructure Formation in Slag Solidification at Continuous Casting Mold

Bhagurkar, Ashutosh and Qin, Rongshan (2022). The Microstructure Formation in Slag Solidification at Continuous Casting Mold. Metals, 12(4), article no. 617.

DOI: https://doi.org/10.3390/met12040617

Abstract

The microstructure of slag film solidified on the inner wall of mold in continuous casting of low carbon steel has been examined experimentally and analyzed theoretically. A puzzle for the crystallization sequence has been solved by this work, which is useful to guide the modification of slag microstructure in efficient casting of advanced steels. The experiments observed three crystalline bands, each containing an initial block-shaped crystal sub-band and late-developed dendrite sub-band. The grain size and morphology change monotonically across the crystalline layers to form a gradient structure. The reason for this is that the solute segregation causes considerable surging of viscosity and constitutional undercooling in the liquid phase. This is rarely seen in the casting of alloys and have not been pointed out previously in the casting of oxide mixtures.

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About

• Item ORO ID
• 82625
• Item Type
• Journal Item
• ISSN
• 2075-4701
• Project Funding Details

• Funded Project Name	Project ID	Funding Body
  Optimisation of Local Heat Transfer in the CC Mould for Casting Challenging and Innovative Steel – OPTILOCALHT	847269	European Commission RFCS
  UK Consortium on mesoscale engineering sciences - UKCOMES	EP/R029598/1	EPSRC

• Keywords
• slag; microstructure; dendrite; viscosity
• Academic Unit or School
• Faculty of Science, Technology, Engineering and Mathematics (STEM) > Engineering and Innovation
  Faculty of Science, Technology, Engineering and Mathematics (STEM)
• Copyright Holders
• © 2022 The Authors
• Depositing User
• Rongshan Qin