According to real-time data recording of cold water parameters for mold and temperature of copper plate measured by thermocouple during test of increasing cast speed of hypoperitectic AQ steel grade 230 mm ×1200 mm slab

and combined with math model and ANSYS commercial software

the influence of increasing casting speed on mold average heal flux

local heat flux

temperature field of copper plate and thickness of strand shell has been studied. Results showed that with increasing casting speed from 1.3 m/min to 1.5 m/min

the average heat flux increased by about 0.1 MW/m²

the local heat flux in broadside meniscus region increased by more than 0.13 MW/m²which were all in reasonable range due to using test mold powder with high basicity and high crystallizing temperature; the average ratio of heat flux of mold narrow/broad-side was 0.9 so the taper of copper plate should be reduced properly; and the average thickness of broadside strand shell reduced by about 4 mm

therefore the intensity of heat transfer of mold must be controlled strictly to ensure casting process stability and slab quality.