DEVELOPMENT OF A HIGH-SPEED COLD-ROLLING OIL WITH MILL CLEANNESS PROPERTY

The purpose of this study was to develop a cold rolling oil with lubri city and mill cleanness property under the rolling conditions of high reduction ratio and high rolling speed. Seven kinds of test oils compo sed of various base oils, emulsifiers, EP additives, anti-oxidants etc . were blended. Evaluation of lubricity and anti-seizure property of t he test oils was carried out with a laboratory scale rolling mill, whe re the contact conditions between work roll and strip are very close t o those of an actual cold rolling mill. Laboratory evaluation for disp ersibility, anti-contaminantion property, rust prevention property, re sidual carbon, etc. were carried out with several testers such as a lo ng-term circulation tester, the oxidation stability tester and the Con radson residual carbon tester. Finally, a new high speed cold rolling oil with good lubricity and mill cleanness property was developed by r eferring to the previously developed high speed cold rolling oil.