STEEL FOR HIGH CARBON CHROMIUM BEARING HAVING EXCELLENT FATIGUE RESISTANCE PROPERTIES AND METHOD FOR MANUFACTURING THE SAME

摘要

The present invention relates to a high carbon chromium bearing steel having excellent endothelial properties and a method for producing the same. An embodiment of the present invention is a steel sheet comprising, by weight%, 0.90 to 1.10% of C, 0.15 to 0.35% of Si, 0.25 to 0.45% of Mn, 1.35 to 1.60% of Cr, 0.025% or less of P, , A content of O is 0.0015% or less, a content of Al is 0.05% or less, a content of Ti is 0.0035% or less, a content of N is 0.0070% or less, the balance Fe and other unavoidable impurities and the maximum size is 14 탆 or less, The present invention also provides a high carbon chromium bearing steel having excellent ductility characteristics with a medium size of 1 to 14 μm and a density of 450 / mm 2 or less and a method for producing the same. According to the present invention, it is possible to provide a high carbon chromium bearing steel having excellent fatigue life characteristics of 10 ⁹ or more and having excellent endothelial property.