Online ISSN : 1883-2954
Print ISSN : 0021-1575
ISSN-L : 0021-1575
Regular Article
Generation Mechanism of Unsteady Bulging in Continuous Casting-1 –Development of Measurement Method for Amount of Unsteady Bulging in Continuous Casting–
Hiroyuki OhnoYuji MikiYuji Nishizawa
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2015 Volume 101 Issue 12 Pages 661-666


Fluctuation of inter-roll bulging in a commercial continuous casting machine was measured in consideration of the fluctuation of the relative distance from the segment to the ground, and compared to the cycle and volume fluctuation of the mold level. The following results were obtained.
1. The amount of segment fluctuation was much smaller than the amount of inter-roll bulging. Therefore, segment fluctuation did not affect the measured results of inter-roll bulging.
2. Inter-roll bulging and the mold level fluctuated with the same cycle, and this cycle corresponded to the cycle calculated from the roll pitch and casting speed. Therefore, it was confirmed that the value measured by an ultrasonic range finder in this study was unsteady bulging.
3. The amplitude of the mold level converted from the amount of fluctuation of inter-roll bulging corresponded to the actual mold level. Therefore, the amount of fluctuation of inter-roll bulging measured in this study was considered reasonable.
In addition, the unsteady bulging shape was estimated.

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© 2015 The Iron and Steel Institute of Japan
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