Method for eliminating edge fault of aluminium killed steel with low manganese-sulfur ratio and low carbon
A low-carbon aluminum-killed steel, manganese-sulfur ratio technology, applied in the field of steel rolling, to achieve the effect of reducing production costs and smelting difficulty
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[0018] Specific implementation examples
[0019] The rolling of low-carbon aluminum-killed steel SPHC (a low-carbon aluminum-killed steel named after a Japanese brand name) was carried out on the 2250mm hot continuous rolling production line of Shougang Qiangang by using the method and control means involved in the present invention. The size of the slab is 230×1250×9000mm, the rolling specification of No. 1~9 is 3.0×1275mm, and the rolling specification of No.10~12 is 3.0×1110mm.
[0020] Table 1 Key points of process control, ℃
[0021]
[0022]
[0023] 1. For No. 1-9 slabs, stack cooling after off-line, the calculated cooling rate is 8°C / min, and air-cooling after No. 10-12 slabs off-line;
[0024] 2. The temperature and residence time of the slabs in each section of the heating furnace are shown in Table 1, and the slabs of No. The slab is cold loaded and heated according to conventional methods;
[0025] 3. For rough descaling of slabs No. 1 to 9, single descali...
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