The Influences on Microstructure and Segregation of the Jumbo Slab Ingot by Different Cooling Speed

Nan Lv; Yong Long Jin; Sheng Li Li; Xin Gang Ai

doi:10.4028/www.scientific.net/AMR.941-944.1782

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The Influences on Microstructure and Segregation of the Jumbo Slab Ingot by Different Cooling Speed
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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 941-944The Influences on Microstructure and Segregation...

The Influences on Microstructure and Segregation of the Jumbo Slab Ingot by Different Cooling Speed

Abstract:

Shrinkage porosity and segregation defects are often found in an air cooled jumbo steel ingot, which will influence the quality of the final rolled plates.The solidification behaviours for a 60t jumbo slab ingot under varied cooling conditions were simulated using the ProCast software.The influences of different cooling speed on dendrite distribution and segregation were studied.The results show the jumbo slab ingot could freeze layer by layer when the heat transfer coeffcients of mould increase to 1000W·K^-1·m^-2. The thick finer chill zone were achieved. At the same time, the columnar crystals grow preferentially parrelling to the density of heat flow, and finer equiaxied crystals are formed in the core of the ingot. They all improve the microstructure and decrease the composition segregation of jumbo slab ingot.

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Periodical:

Advanced Materials Research (Volumes 941-944)

Pages:

1782-1787

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.941-944.1782

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Online since:

June 2014

Authors:

Nan Lv, Yong Long Jin, Sheng Li Li, Xin Gang Ai

Keywords:

Heat Flow, Jumbo Slab Ingot, Segregation, Temperature Difference

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