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 Φ5. 5 mm coil of 82A tire cord steel has been studied by commercial test. The results of metallographic examination and electrolytic analysis of inclusions show that with the tundish non-adding weir

the amount 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.