| abstract |
The title lubricant composition comprises a base oil or base grease and a specified amount of a heat insulating agent comprising (A) an inorganic compound undergoing endothermic melting at temperatures of 1200° C or below and (B) an inorganic powder which neither melts nor decomposes at temperatures of 1200° C or below and which has a thermal conductiviry of 0.01 cal/cm.s. °C or less and a friction coefficient of 0.7 or less at room temperature added alone or as a combination. This lubricant composition has an excellent heat-insulating effect and is effective in preventing occurrence of thermal crown of working rolls. |