日本高磁感取向硅钢连铸坯生产技术

为了生产高磁感取向硅钢板用板坯，钢中添加Bi：0．0005％～0．05％，加入时，在中间包的外侧的钢水池中形成上围堰，并且用被覆了铁的圆桶，桶内装入Bi或Bi的合金加入到钢水中，钢水流量除以喷嘴内面积求出浸渍喷嘴内的钢水流量密度Q（≥0．9t／（m^2·s^-1）），为了使结晶内液面形成旋流，采用电磁搅拌，其推力F要满足关系式（3．000≤F≤10．000Pa·m^-1）。

CASTING CAST SLABS OF HIGH MAGNETIC FUX DENSITY GRAIN ORIENTED SILICON STEEL SHEET

To stably produce cast slabs of ultra high Magnetic Fux Density Grain Oriented Silicon Steel Sheet, the content of Bi in the steel is controlled to 0.000 5% to 0.05%, a region divided by providing an upper weir is formed in a molten steel pool on the outlet side of a tundish, and, as an iron-coated wire filled with Bi or a Bi alloy is fed into the region, the flow rate density Q of the molten steel in an immersion nozzle obtained by dividing the flow rate of the molten steel by the inner area of the nozzle, and the thrust F of electromagnetic stirring for forming a rotating flow in the vicinity of the molten steel surface satisfy the relational inequalities, provide means for advantageously solving unstableness which is a problem when a Bi-containing phase is utilized as an inhibitor forming.