Evaluation of the efficiency of the lubricating film in cold rolling by means of a highly specific dynamic test
Oil-in-water emulsions that are used in cold rolling of both strip and ultra-thin sheet steel act both as lubricant and coolant. The purpose of this work is to develop a technological test for comparisons between different oils and emulsions, under reproducible conditions similar to those encountered in practice at the moment of impact between roll and strip. This is achieved by dropping a "hammer" onto an anvil. The hammer consists of a small mass of tool steel integral with a calibrated steel spring, so as to cause complete deceleration in a time of the order of milliseconds. A small sample of sheet steel, covered with the fluid to be tested, is placed on the anvil. The trend of the pressure-deformation curves and the distribution of the impact energy between elastic and dissipated energy have been shown to be similar to those that occur in practice. The tests are relatively simple to run and can be repeated under identical conditions in a very short time interval, in order to improve the accuracy of the results and the discrimination of the tests.
Bibliographic Reference: EUR 12172 IT (1989) 36 pp., MF, ECU 4, blow-up copy ECU 5
Record Number: 199010247 / Last updated on: 1994-12-01
Original language: it
Available languages: it