State-of-the-art flatness control improves quality at the Benxi No. 1 hot strip mill

摘要

The evolution of hot strip rolling during the last 10 years has called for a parallel evolution of optical flatness gauge technology, because of the limitations of 1-plane gauges in thin strip rolling. The IRM group's response to this concern is based on the 3-plane measurement concept. The development started in 1994. In operation since 1998, this gauge technology has already proved highly successful in various plants. The gauge installed in the Benxi No. 1 HSM has proved high reliability and accuracy for the flatness control over the last 3 years. It is without doubt an asset to Benxi in the competitive Chinese market of high quality flat products. As a consequence, the decision has been taken to also equip the Benxi No. 2 HSM (presently under construction) with the same type of flatness gauge.