Lubricant action of emulsions in rolling: Theory and practice

Resumo

The lubricant action of emulsion in rolling is considered. The entrainment of multiphase liquids (rolling fluids) into the deformation zone in the course of rolling is analyzed. A mathematical model is proposed for the flow of emulsion to the roller–strip contact zone and its infiltration into the deformation zone. Analysis of experimental data shows that the thickness of the lubricant layer in the deformation zone is directly proportional to the viscosity and adhesive properties of the disperse medium (the oil in the emulsion) and inversely proportional to the degree of reduction and the yield point of the metal being rolled. Recommendations are made regarding the selection of rolling conditions and regulation of the process.