Skin-pass mills improve the final strip quality, including strip surface defects and roughness formed on the processing line.
Nippon Steel & Sumikin Engineering Co., Ltd. (NSENGI)'s 4Hi skin-pass mill is a robust facility with high levels of mill rigidity. Our proprietary rolling control (position control and auto force control) and texture control technologies also enable a high-quality strip surface appearance to be obtained stably. In addition, work roll cleaning is performed using our proprietary cavitation jet in air, rather than with a conventional brush roll or high-pressure water washing. This enables the efficient removal of zinc powder on the roll's surface without causing a deterioration in the surface roughness of the roll.
Our tension leveller has sufficient rigidity and excellent operational stability. Excellent flatness is achieved with high levels of precision by means of layout design and intermeshing control of optimal leveller rolls that are compatible with various steel grades.
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