Study on Wear Debris Generation in Cold Rolling of Aluminum (Part 2): The Influence of Oiliness Agent on Wear Debris Generation

摘要

Using the cold rolling tests of aluminum under the almost identical mechanical conditions, the influence of oiliness agents added into rolling oils on wear debris generation was investigated and the following results were obtained: (1) The amounts of wear debris increased more when the alcohol with longer alkyl chain added as an oiliness agent and in the case of increased alcohol concentration. (2) The main reason of the above was due to the increased sliding friction distance between the work roll and the aluminum material because of the decreased forward slip ratio. The relationships between the amounts of wear debris and the sliding friction distance were in good correlation in both operations of sheet and the foil rolling. (3) The amounts of wear debris increased more when a fatty acid was added as an oiliness agent. This may possibly be caused by the reason that the abrasive wear between the rolled material and work roll is enhanced by such an effective lubricant as a fatty acid having high adsorption activity on nascent aluminum surface. (4) The oiliness agents having different functional groups influenced the amounts of roll coating and the portion of the amounts of wear debris adhered on the rolled sheet and moved into the oil. This may also be explained by some difference in the adsorption activity of the oiliness agents on the nascent surface of aluminum.