| 摘要 |
In the case of moulds for continuous casting of polygonal billet cross-sections, more particularly with a square or hexagonal cross-section, the mould cavity (6) can have one shape at the pouring-in end (4) and a different shape at the billet outlet end (5). The aim, by controlled shaping of the billet cross-section inside the mould, is to improve the cooling of the crust of the billet, in order to improve the quality of the billet and also increase the speed of casting. To this end, it is proposed to provide a cross-sectional enlargement (7) in the form of a bulge (9) in each peripheral portion of the mould cavity (6), and the width (10) of the bulge (9) in the direction (11) of advance of the billet, at least along a part (12) of the length of the mould cavity (6), decreases in such a way that the billet cross-section changes shape in transit through the part length (12) of the mould cavity (6).
|
