Tension compensation technique based on the roughness attenuation of a furnace roller during continuous annealing

ABSTRACT

Strip tension fluctuation caused by the attenuation of a furnace roller’s surface roughness leads to strip deviation in continuous annealing. After several field experiments and theoretical studies, this work established a model for the surface roughness attenuation of a furnace roller during continuous annealing. The model is fully integrated with the equipment and process features of a continuous annealing unit. With the stability of strip travelling as the control object and the absence of strip deviation and buckling as constraints, a tension compensation technique of continuous annealing was developed, and a related theory was applied to production and practise. Software was also developed for predicting the roughness attenuation of a furnace roller during continuous annealing and determining tension compensation for a specific process of the unit. Integrated optimisation of tension parameters in all processes of continuous annealing was also achieved.

KEYWORDS:

• Continuous annealing
• roughness attenuation
• tension compensation

Acknowledgements

A few experiments were made in Baosteel Stainless Steel Co., Ltd. We gratefully acknowledge the technical support of Baosteel.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This research was supported by Hebei Natural Science Foundation of China (No.E2016203385) and Heavy Machinery Collaborative Innovation Program (No.ZX01-20140400-05).