Sumitomo Metal Ind. Ltd.

Metal, Japan

Sumitomo Metal Ind. Ltd.

Metal, Japan
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Masui T.,Sumitomo Metal Ind. Ltd.
Proceedings of the 10th International Conference on Steel Rolling | Year: 2010

Production of steel plate has increased these ten years along with the rapid economical growth in Asia led by China. Quality requirements from customers have been highly leveled, still severer and further diversified. In order to cope with these requirements, Japanese Steel Industries have set about developing various manufacturing technologies and product technologies for the steel plate. This article summarizes these developing technologies (Improvement of CC slab quality, expansion of plate mill control ability, strengthening cooling installation, and introduction of heavy cold leveler and special mill for flattening, etc.) and introduces examples of new products in various markets in the last decade. Henceforth, it will be important to develop environmentally friendly technologies for sustainability and to develop integrated product technologies including application technologies at the side of customers, in addition to strengthen cost competitiveness and create a new demand for the steel plate.

Adachi M.,Sumikin Iron and Steel Corporation | Hayashi H.,Sumikin Iron and Steel Corporation | Hirata A.,Sumitomo Metal Ind. Ltd. | Okada N.,Sumitomo Metal Ind. Ltd. | Kawamoto M.,Sumitomo Metal Ind. Ltd.
SEAISI Quarterly (South East Asia Iron and Steel Institute) | Year: 2010

The low carbon steel slabs, which are supplied to other companies in large lot size, have been cast at the No.3 slab caster in Wakayama Steel Works since 2002. In order to increase the productivity of casting these high quality slabs, techniques to increase the casting sequences were investigated. As a result, electro magnetic brakes have been applied in the mold for the prevention of surface defects on the slabs in high speed casting. The sliding plate and the submerged nozzle have also been improved for the prevention of nozzle clogging. Due to these changes, the number of casting sequences have been increased dramatically.

Mizukami H.,Sumitomo Metal Ind. Ltd. | Hayashi K.,Sumitomo Metal Ind. Ltd. | Hayashi K.,Sumitomo Metal Inds. Ltd. | Numata M.,Sumitomo Metal Ind. Ltd. | Yamanaka A.,Sumitomo Metal Ind. Ltd.
Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan | Year: 2011

Synopsis: Solid-liquid interfacial energy of steel during solidification was measured predicted from the both experimental techniques of unidirectional solidification and thermal analysis applying the dendrite growth model and heterogeneous nucleation model. Solid-liquid interfacial energy changed depending on primary phase during solidification, i.e., that of primary d phase was larger than that of γ phase. When the primary phase was the same, solid-liquid interfacial energy increased with increasing carbon content. Primary dendrite arm spacing changed depending on solid-liquid interfacial energy. A trace amount of bismuth which had the effect of a decrease in the solid-liquid interfacial energy of steel during solidification decreased primary and secondary dendrite arm spacing, significantly.

Kimura Y.,Sumitomo Metal Ind. Ltd. | Takatani K.,Sumitomo Metal Ind. Ltd. | Otsu N.,Sumitomo Metal Ind. Ltd.
ISIJ International | Year: 2010

A three-dimensional mathematical model that can simulate the transient heat and mass transfer phenomena in a hot stove has been developed. This mathematical model can treat the turbulent mixing of fuel and air, combustion of fuel, buoyancy convection, heat radiation, and the heat exchange between the gas and heat storage bricks. Comparison of the calculated results with actual measured data was done in order to verify the availability and accuracy of the mathematical model, and computational results gave good agreement with measured data. Brick alignment and operating conditions for a new hot stove can be designed by using this mathematical model. © 2010 ISIJ.

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