6流非对称40t中间包挡墙和挡坝对帘线钢盘条夹杂物的影响

Effect of Weir and Dam in 6-Strand Asymmetric 40 t Tundish on Inclusions in Coil of Tire Cord Steel

通过工业试验研究了6流非对称40t中间包不加挡墙、加挡墙和同时加挡墙挡坝对82A帘线钢Φ5.5 mm盘条夹杂物数量和尺寸的影响。金相检验和电解夹杂物分析结果表明,中间包不加挡墙,近流盘条中夹杂物数量多且尺寸大;加挡墙后,近流盘条中夹杂物数量明显减少且尺寸减小,但远流盘条中夹杂物数量增多且尺寸较大;当加挡墙和挡坝,远流和近流盘条中夹杂物数量和尺寸均明显下降。

The effect of 6-strand asymmetric 40 t tundish original no-adding weir, adding weir, and adding weir ＋ dam on amount and size of inclusions in qb5.5 mm coil of 82A tire cord steel has been studied by commercial test. The re- suits of metallographic examination and electrolytic analysis of inclusions show that with the tundish non-adding weir, the a- mount and size of inclusions in coil rolled from near-stream strand billet are more and larger; with the tundish adding weir the amount and size of inclusions in coil rolled from near strand obviously decrease, but the amount and size of inclusions in coil rolled from far strand increase and larger; and with adding weir ＋ dam the amount and size of inclusions in coil rolled from near and far strand all obviously decrease.