| 摘要 |
PROBLEM TO BE SOLVED: To produce a wide width strip having uniform strip thickness in the width direction by using a nozzle giving the longitudinal direction distribution according to a specific equation. SOLUTION: The wide width metallic strip is produced by injecting molten metal on the surface of a cooling roll during rotating at high speed from the slitting opening hole nozzle extended as slender-state in the axial direction of the roll and rapidly solidifying. Then, the nozzle giving the longitudinal direction distribution according to the equation I related to the gap crossing at the right angle with the longitudinal direction of the slitting opening hole, is used. In the equation I, a (x) is the gap in the distance (x) from the center part of the longitudinal direction of the slitting opening hole (mm), ao is the gap at the center part of the longitudinal direction, tce is the strip thickness at the center part of the metallic strip produced with the nozzle having the gap ao (μm), ted is the strip thickness of the edge parts of the metallic strip (mm), L is the width of the metallic strip (mm), (n) is the constant showing the influential degree of the gap to the strip thickness and strip thickness∝(slit gap)<n> . By this method, the opening hole shape of the nozzle can be optimized.
|
