Assessment of Cold Rolling Lubricants by 3-D Stribeck Curves and Roll Bite Mimicking Tests
In order to account for the plastic surface deformation occurring in cold rolling,a novel,3-D Stribeck curve is proposed.This curve is characterised by three ”anchor points” which represent(1)the friction in the boundary regime,(2)the friction in the elastohydrodynamic regime,and(3)the friction experienced in a thin lubricant film.Two operational numbers define the lubrication regime,representing(1)film formation in the inlet zone,governed among others by the process speed and(2)in-bite film formation facilitated by plastic surface deformation,governed among others by the sliding speed in the contact.Lubrication in the rolling process can be influenced by any of the 3 anchor points and 2 film formation mechanisms,all of which are influenced by the lubricant composition.The ideas behind the 3-D Stribeck curve can be used in a more targeted lubricant development.The 3-D Stribeck curve can be measured in the laboratory,preferably for emulsions.Additional test methods were developed to investigate boundary lubrication of emulsions under severe conditions,mimicking frictional power intensity and flash temperatures in the roll bite.Good correlations are found with performance in a pilot mill and a production mill.
plastic surface deformation boundary lubrication EHL thin-film lubrication wear
Smeulders Bas
Research Scientist,Quaker Chemical,The Netherlands
国内会议
上海
英文
1-5
2015-10-21（万方平台首次上网日期，不代表论文的发表时间）