Influence of reduction and lubrication on pressure during high speed cold rolling

A study made into the dependence of pressure nonuniformity in a deformation zone on reduction in area and lubrication during high-speed rolling of various materials (carbon steel type 08kp, stainless steel type 12Kh18N9T and Al-Mn alloy type AMts). Cold rolling was carried out with 10-50 % reduction and roll rotation velocity varying between 2.9 and 61 m/s. Mineral oil I20, Genrex 26 4 % and water emulsions of synthetic lubricants were used. An increase of reduction in area is shown to result in pressure nonuniformity increase. This parameter decreases if the efficiency of lubricants rises. The character of yield strength variation for materials rolled also affects pressure nonuniformity. 3 refs., 2 figs., 3 tabs