Lubrication Behavior of Nano SiO2 Cluster in Water-based Cold rolling Liquid

As a kind of new lubricant additive, Nano SiO2 particles exist in the form of particle cluster in suspensions. The objective of the present study is to put forward the lubrication behavior of Nano SiO2 clusters in water-based cold rolling liquid through cold rolling experiments of Q235 steel. PH values were adjusted to find out the best degree of dispersion. Samples were investigated through micro surface observation and elemental analysis. It is found that Nano particle clusters strengthened the spreading property of lubricant film and enhanced the stability by splitting into smaller clusters under rapid increased stress in micro bulge zone. Those split clusters reshaped into larger clusters again though the attractive force between micro particles, thus actions became circulations. This study focus on the behavior of nanoparticle clusters in lubricating instead of each single Nano fines, which is more practical and applicable.