| 摘要 |
The invention concerns a continuous-casting mould for the production of thin slabs, the mould having an oblong internal cross section and cooled walls (1, 2) and the melt being poured in through at least one delivery nozzle (4) which dips into the melt. In order that, during casting, significantly lower stresses and hence fewer cracks occur in the casting shell, the invention proposes that, at least at the final level of the melt at least over part of the depth of immersion of the delivery nozzle, the ratio of the gap widths STI and SII/2 and the ratio of the cooling capacities LTI and LII of the mould wall (1, 2) are related by the inequality [STI/(SII/2)]/[LTI/LII] > 1 where STI is the width of the gap (7) in the zone immediately surrounding the immersed delivery nozzle (4) between the outside surface (6) of the nozzle (4) and the inside surface (5) of the mould wall (1) immediately opposite it; SII/2 is half the width of the gap (9) between the inside surfaces (8) of the mould wall (1) in those parts of the mould in which they lie directly opposite each other; LTI and LII are the cooling capacities of those areas of the mould wall (1, 2) which form the respective gaps. |
