A New Model for the Prediction of the Dog-bone Shape in Steel Mills

作者：Yun Duckjoong^*; Lee Donghun; Kim Jaeboo; Hwang Sangmoo

来源：ISIJ International, 2012, 52(6): 1109-1117.

DOI：10.2355/isijinternational.52.1109

• vertical rolling
• finite element method
• dog-bone shape
• minimum energy principle
• admissible velocity field

Precision control of the width of slabs, plates and strips, is vital for product quality and production economy in steel mills. A common practice in the production line is to perform vertical rolling and reduce the width in the roughing mill. However, the formation of so called %26apos;dog-bone%26apos; at the edge of the slab would affect the final width after horizontal rolling that follows. Therefore, it is essential to predict and control the dog-bone shape. In this paper we present a new model for the prediction of the dog-bone shape during vertical rolling in roughing mills. The model is developed on the basis of the minimum energy principle for a rigid-plastic material and a three-dimensional admissible velocity field. The predictions accuracy of the proposed model is examined via comparison with predictions from finite element simulation and also with experimental data.

• 出版日期2012