| 摘要 |
PURPOSE: To improve the quality of a slab in the case of changing the velocity in the high velocity casting range by controlling the casting velocity according to the prescribed equations, in a method for changing the casting velocity at the time of casting. CONSTITUTION: In the method for changing the casting velocity at the time of casting in a continuous casting for steel, the casting velocity is controlled with the equation I and the equation II to change the velocity changing ratio according to the casting velocity, and further, set by separating into the case of accelerating the casting velocity Vc and the case of decelerating the casting velocity. (Velocity acceleration) Vc =|Vn -Vn-1|SIN.2πfn t... (Velocity deceleration) Vc =|Vn+1 -Vn|SIN.2πfn t... Equation II. fn =k.Vn . Wherein, Vn is the target arrival velocity (at the time of accelerating the velocity): the velocity change starting velocity (at the time of decelerating the velocity), Vn-1 is the velocity change starting velocity (at the time of accelerating the velocity), Vn+1 is the target arrival velocity (at the time of decelerating the velocity), fn is the frequency (the frequency of a curve), (t) is time and K is the constant (the mold width, the kind of steel).
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