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VERSION:2.0
METHOD:PUBLISH
BEGIN:VEVENT
ORGANIZER;CN=ESTAD 2023:mailto:info@metec-estad.com
LOCATION:Room 26
SUMMARY:Optimization of spray conditions in strip quenching for CAL through repetitive cooling experiments
DESCRIPTION:The cooling speed over a certain level and the consistency of temperature profile are essential for the thermal cycle in the continuous annealing line (CAL) for an advanced high-strength steel strip (AHSS.) Because this particular cycle usually involves multiple water sprays, optimization of the spray pattern and nozzle arrangement, which affect the cooling speed and temperature, is expected to complete the requirements.The test to cool a rotating hot drum is conducted numerous times with various spray patterns and nozzle arrangements on the experimental equipment that replicates the process in the subject cycle as necessary and sufficient. A heated steel drum is rotated at the speed corresponding to the running speed of the strip. The water films formed on the inner surface and the intermittent cooling process are produced under the almost same conditions as in the actual cycle in the CAL. For the horizontal cooling pass, the drum is placed in an inverted position and given an appropriate taper angle so that the vertical distribution of the water film thickness formed by centrifugal force due to the rotation simulates the distribution of the water film across the width of the steel strip.Through those trials performed enough times, the ideal spray pattern and nozzle arrangement to cool an 800℃ strip of 1 mm in thickness to 100℃ at 1000K/sec or better and within ±10K of temperature consistency are identified.

CLASS:PUBLIC
DTSTART:20230614T113000
DTEND:20230614T115000
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