| ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ KAWASAKI STEEL TECHNICAL REPORT No.22 ( May 1990 ) Advanced Technologies of Iron and Steel, Commemorating the 20th Anniversary of the Technical Research Division ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ |
| Development of Thin Slab Caster Hirokazu Tozawa, Saburo Moriwaki, Noboru Yasukawa, Tetsuya Fujii, Takao Koshikawa, Tomoaki Kimura |
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Synopsis : Thin slab caster of the vertical twin belt type has been developed to realize an innovative continuous casting technique. Key techniques required for the development are as follows: (1) The use of a high speed water film to uniformly cool and to support the belt, (2) progressive reduction in mold thickness along casting direction to enable us to apply conventional-type pouring systems. A commercial size caster termed KH was installed to establish stable casting techniques and to see the qualities of the product. Casting experiments of more than 100 heats made it clear that thin slabs of 30 mm in thickness and 800 to 1000 mm in width with good surface quality were able to be stably cast over 40 t per charge at the maximum casting speed of 10 to 12.5 m/min. The thin slabs were directly hot rolled without reheating; the resultant hot coil showed a good appearance and good mechanical properties comparable to those of conventional products. |
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