Effect of Roll Lubricants on the Deformation and Force Indicators and the Strip Sizes during Cold Rolling of Copper

—The effect of lubricants on the force and deformation indicators during cold rolling of M0 copper strips with various lubricants is studied. The use of lubricants decreases the rolling force by up to 7%, increases the relative reduction by up to 3%, and decreases the strip thickness at the exit from the mill by about 0.09 mm as compared to the deformation in dry rolls. Upon rolling M0 copper strips with lubricants, the difference between the deformation and force indicators in the end sections and the middle part is smaller than upon rolling strips in dry rolls. The difference in the strains of the end sections and the middle part of the strips decreases from 2.03 and 1.96% for rolling in dry rolls and down to 0.99% at the front and 0.91% at the rear ends of the rolled products upon rolling with lubricants. The nonuniformity the rolling force distribution decreases from 23.77 kN (44.6%) at the front and 23.60 kN (44.3%) at the rear end for rolling in dry rolls and to 17.99 kN (35.3%) and 17.10 kN (34.5%) for rolling strips with lubricants. As compared to the deformation in dry rolls, the force in the front and rear sections for rolling with lubricants is higher than for rolling without lubrication by 0.58–2.57 and 0.51–2.79 kN, respectively. In contrast, the rolling force in the middle of the bands is lower by 1.21–3.71 kN. The strains in the initial and end zones for rolling with lubricants are higher than for rolling in dry rolls by 0.33–1.64 and 0.40–1.63%, respectively. In the middle of the strips, the strain is also higher by 0.98–2.68%.