Abstract:The dispersion stability of graphene in water was investigate with different dispersants,and the antifriction performance of graphene aqueous solution with different grapheme content was studied under different load and frequency.The morphology of wear scar on GCr15/45 steel friction pair under graphene solution lubrication was analyzed,and the anti friction mechanism was discussed preliminarily.The results show that the dispersant KH560 and CTAB can improve the dispersion stability of the graphene in water,and reduce the friction coefficient of graphene solutionWith the increase of dispersant content,the friction coefficient of graphene solution is decreased.The antifriction performance of graphene aqueous solution is related to the test load,frequency,and the test load has larger effect on the friction coefficient.The friction mechanism of the GCr15/45 steel friction pair by deionized water lubrication is corrosion wear and abrasive wear,and abrasive wear by graphene aqueous solution lubrication.