The W600 non-oriented silicon steel is produced by 120 t LD (top and bottom combined blown) -RH-LF- 70 mm and 90 mm thin slab concasting-continuous rolling process at No1 Steelworks
Maanshan Steel. The chemical composition C≤0. 005%
P0. 050%
Als0.20% and N≤40 x 10
-6
was controlled by using the measures such as controlling LD tapping [C
]
0. 03% 〜0.04%
RH vacuum decarburizing to 0. 002 5% C
adding FeP before RH decarburizing
LF secondary refining desulphurizing and RH-LF adjusting Als ; the produced slab of W600 steel had even analyses and the mechanical properties met the technical requirement.