Abstract: A kind of complex lithium-based grease for wind power was synthesized using poly-α olefin (PAO40）as base oil and complex lithium soap as thickener. The effects of additives including dibutyl dithiocarbamate（T351） and amino-sulfide（T323）on the friction reduction and anti-wear abilities for steel/steel pairs were investigated by MFT-R4000 high-speed reciprocating friction and wear tester. The morphologies and typical chemical composition of the worn surfaces were characterized by scanning electron microscopy （SEM） and energy-dispersive X-ray spectroscopy （EDS）. The results showed that the prepared wind power grease exhibits preferable tribological properties compared with the imported wind power grease.

Key words: poly α-olefins, extreme pressure antiwear, lubricating grease for wind power grease, tribological property