Cooling drum for thin slab continuous casting, processing...

B - Operations – Transporting – 22 – D

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Details

B22D 11/06 (2006.01) B23K 26/00 (2006.01) C21D 9/573 (2006.01)

Patent

CA 2377876

Dimples, preferably 40 to 200 µm in average depth and 0.5 to 3 mm in diameter of circle equivalent, are formed on the peripheral surface of a cooling drum, adjacent to each other at the rims of the dimples; and fine humps (preferably, fine humps 1 to 50 µm in height and 5 to 200 µm in diameter of circle equivalent on the surfaces of the dimples and/or fine humps 1 to 50 µm in height and 30 to 200 µm in diameter of circle equivalent at the rims of the dimples), fine holes (preferably, fine holes 5 µm or more in depth and 10 to 200 µm in diameter of circle equivalent), or fine unevenness (preferably, fine unevenness 1 to 50 µm in average depth and 10 to 200 µm in diameter of circle equivalent) are formed at the rims and/or on the indented surfaces of said dimples.

Des corps creux, notamment des corps creux ayant chacun une profondeur moyenne de 40 à 200 mu m et un diamètre équivalent à 0,5 3 mm, sont formés sur la surface périphérique d'un tambour de refroidissement, ces corps creux étant adjacents au niveau de leurs extrémités lors du moulage. Sur/dans ces extrémités et/ou les surfaces desdits corps creux sont formés de minuscules saillies (de préférence, des saillies de 1 50 mu m de hauteur et de 5 200 mu m de diamètre sur la surface des corps creux, et de 1 50 mu m de hauteur et de 30 200 mu m de diamètre sur les extrémités des corps creux), de petits puits (de préférence, des puits d'au moins 5 mu m de profondeur et 10 200 mu m de diamètre) ou de minuscules irrégularités (de préférence, des irrégularités de 1 50 mu m de profondeur et de 10 200 mu m de diamètre).

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