| 摘要 |
1,201,315. Continuous casting. PADERWERK GEB. BENTELER. 16 Aug., 1967 [20 Aug., 1966], No. 37586/67. Heading B3F. Metal such as steel or steel alloy is continuously cast in a copper mould 2 which has coolant water passages 4 and the strand is subsequently cooled directly by flat jets 13 of coolant water delivered with a high kinetic energy per unit area, e.g. 20 Kp.m. per sq. em., of the strand surface, between flat steel guidestiips 8 of a cooling cage 3 which contacts the strand, the breadth of the coolant jets being less than that of gaps between the guide-strips. The water is supplied to flat-jet nozzles 12 from an annular conduit 11, but, instead of one such nozzle to each gap as shown, there may be several flat- or round-jet nozzles down the length of the gap to produce a combined flat jet at the strand surface. The density and/or energy of the jet may decrease towards the bottom of the cooling area. The cooling cage 3 of guide-strips 8 may be detachably secured to the mould 1 and may be the same length as the latter, whose length may be twice the width of the strand or less. A casting speed of 2À8 m./min. with a strand shell temperature below the cage of under 1000‹ C. is said to be achievable. |
