Bearing steel and rolling bearing made thereof

摘要

A long-life bearing steel and a long-life rolling bearing made of the steel are disclosed. In the steel, the number of oxide or oxide-based inclusion particles in a given unit area A of 160 mm3 with an average particle size of 3 to 30 (my)m is 80 or less and an abundance of oxide or oxide-base inclusion particles with 10 (my)m or more average particle size to oxide or oxide-based inclusion particles having an average particle size of 3 to 30 (my)m is below 2%. An electron beam melting extraction evaluation method irradiating electron beam under the following condition guarantees the cleanness of the steel: 350 V+100<=J<=700 V+200, wherein J represents electric charge power in W provided by electron beam and V represents a sample volume in cm3.