ROLLING BEARING USED IN WATER OF HIGH TEMPERATURE AND HIGH PRESSURE

摘要

PROBLEM TO BE SOLVED: To provide a rolling bearing having a long life even when the bearing is used in water of a high temp. and high pressure by forming the surface parts of rolling elements and raceway elements of specific materials and forming the surface parts of these rolling elements of materials which are of the kind different from the materials of the surface parts of the rolling elements and have high hardness. SOLUTION: At least the surface parts of the bearing wheels of the rolling bearing are formed of one kind of the materials selected from a group consisting of cermet, stellite and precipitation hardened stainless steel and at least the surface parts of the rolling elements are formed of one kind of the materials selected from a group consisting of cermet, stellite and ceramics composed mainly of silicon carbide. The surface parts of the bearing wheels and the surface parts of the rolling elements are formed of the different materials and these materials are so combined that the hardness of the surface parts of the rolling elements is higher than the hardness of the surface parts of the bearing wheels in the combinations of the surface members of the bearing wheels and the rolling elements.