Coordinated Application of Roll Gap Lubrication, Work Roll Cooling and Antipeeling Systems in Hot Rolling Mills

摘要

Mill chatter and work roll peeling can damage work roll surfaces, adversely affecting strip surface quality. This paper discusses how roll gap lubrication, work roll cooling and antipeeling systems can reduce the potential for chatter and increase the life of work roll surfaces. Surface quality requirements for hot rolled steel sheet have continued to become more stringent in recent years. This focus on sheet quality has developed in parallel with corresponding demands for increased productivity and reduced costs at the mill. Although not a panacea, roll gap lubrication systems have received increased attention in support of these objectives. Specifically, roll gap lubrication systems are used in combination with work roll cooling systems and antipeeling systems to: ·Reduce rolling loads and thereby reduce potential for chatter. ·Reduce rolling torques and associated energy requirements. ·Enable redistribution of loads among stands to address chatter issues. ·Increase reductions to decrease final strip thickness. ·Reduce potential for rolled-in scale. ·Extend rolling campaign length.