Investigation of Solidification Heat Transfer in Slab Continuous Casting Process Based on Different Roll Contact...

Area of Science:

• Materials Science
• Metallurgical Engineering
• Heat Transfer

Background:

• Roll contact significantly affects slab heat transfer during continuous casting.
• The impact of different roll contact calculation methods on heat transfer predictions remains uninvestigated.

Purpose of the Study:

• To investigate the influence of real roll contact (R. method) and equivalent roll contact (E. method) on heat transfer predictions for wide-thick slabs.
• To compare the accuracy of these two methods in predicting slab surface temperature, mushy region length, and solidification end position.

Main Methods:

• A 2D heat transfer model was developed for wide-thick slab solidification.
• The model utilized both the real roll contact (R. method) and equivalent roll contact (E. method).
• Model predictions were validated against infrared camera (surface temperature) and nail shooting (shell thickness) experimental data.

Main Results:

• Both methods accurately predict slab surface temperature when transient temperature dips are ignored.
• The equivalent roll contact (E. method) shows significant deviations in predicting mushy region length and solidification end position.
• Compared to the R. method, the E. method overestimates mushy region length and delays the solidification end position.

Conclusions:

• The real roll contact method (R. method) provides more accurate predictions for mushy region length and solidification end position in wide-thick slab continuous casting.
• The equivalent roll contact method (E. method) is suitable for surface temperature prediction but less so for internal solidification parameters.
• Accurate selection of roll contact modeling is crucial for precise heat transfer analysis in continuous casting.