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Guan C.-L.,Northeastern University China | Guan C.-L.,Steelmaking and Rolling Plant of Tonghua Iron and Steel Co. | Han L.-H.,Steelmaking and Rolling Plant of Tonghua Iron and Steel Co. | Jiang Y.,Steelmaking and Rolling Plant of Tonghua Iron and Steel Co.
Kang T'ieh/Iron and Steel | Year: 2013

Boron microalloying was a new technology to improve the performance of steel, but the problem of edge defects on strip were easily appeared after B was added into steel. Boron microalloying was carried out on steel grade of SS400 on FTSC thin slab casting and rolling process of Tonghua Steel, the problem of edge defect on strip was serious. Based on the investigations of the mechanism of edge defects, production tests were implemented by the control of [Mn], [S], [B], [N] composition and the optimization of secondary cooling on the thin slab caster. The problem of the edge defects on the strip of B microalloy steel of SS400 were solved effectively. Source


Guan C.-L.,Steelmaking and Rolling Plant of Tonghua Iron and Steel Co. | Han L.-H.,Steelmaking and Rolling Plant of Tonghua Iron and Steel Co. | Tang H.-M.,Steelmaking and Rolling Plant of Tonghua Iron and Steel Co.
Kang T'ieh/Iron and Steel (Peking) | Year: 2011

The causes of edge defects on container strips produced by FTSR thin slab casting machine in Tonghua Iron and Steel Co., Ltd. were analyzed. The edge defects ratio of container strips was effectively controlled by optimization of second cooling water, changing the segments with fail rollers on time, removing scale between segment rollers to decrease torsion of pinch rolls, reducing the soft reduction roller gaps by multiple steps, and controlling w([Als]) and w([N]) in the molten steel. Source

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