A kind of water?based clay lubricant without graphite was prepared,it was composed of Brucite clay as basic material,boric acid compound as lubricating additive,and the aluminum dihydrogen phosphate as anti?wear additive.Effects of inorganic salt,boric acid,brucite components on friction properties were tested in four?ball tester at different load,and the optimal proportion of the water?based clay lubricant components was determined by orthogonal test.The improvement on lubrication performance by aluminum dihydrogen phosphate binder in the lubr...