Wear resistance principle of complex lithium calcium grease

One objection is that the lubrication principle of grease has not been concluded, whether the base oil lubricates, or the thickener lubricates, or both. The initial view of grease is that only the base oil lubricates and thickeners only serve as oil storage. However, the subsequent experiments show that the soap not only plays an oil storage role, but also has the effect of reducing wear, and the friction coefficient of the soap is less than that of the base oil.

The additives are also harmful to the extreme pressure antiwear performance of complex lithium/calcium base grease. For example, the viscosity coefficient improvement agent polyisobutene (' R603) improves the adhesion and viscosity temperature of the grease at the same time, improves the structure of the grease, so that the compressive strength of the floating oil produced on the friction surface is improved to a certain extent, thus improving the anti-wear of the grease. Dimethyldithio-hydroxybenzoate dissolves under the action of friction and reflects on the surface of metal materials into FeS surface film, which has the effect of anti-wear.

According to the surface analysis of scientific research, it can be found that the lubrication principle of grease is under the soft standard, the floating oil generated by the base oil plays the role of lubrication; Under strict standards, the absorption film produced by metal material soaps plays a lubricating role; Under very strict standards, the surface film formed by the reaction of metal material soaps, additives and abrasive surfaces provides lubrication.