Bearing alloy steel improved fatigue durability and the method of manufacturing the same

The invention fatigue as that improves the durability of the bearing steel and the production method thereof, and more particularly, based on the total alloy steel by weight, iron (Fe), the main component with the phosphorus (P) 0% by weight greater than 0.03% by weight or less, sulfur (S) 0% by weight, more than 0.01% copper by weight (Cu) 0.01 ~ 0.1 weight%, aluminum (Al) 0.01 ~ 0.06 wt.%, nitrogen (N) 0% excess oxygen (O) 0.006% by weight or less, by weight 0% more than 0.001% by weight, carbon (C) from 0.8 to 1.0 wt%, silicon (Si) 0.9 to 1.6 wt%, manganese (Mn) 0.5 to 1.00 wt%, nickel (Ni) from 0.1 to 0.6 wt.%, chromium (Cr) was 1.4 ~ 1.55 wt%, molybdenum (Mo) is 0.2 to 0.5 wt.%, and vanadium (V) is by including more than 0.4% by weight, more than 0% by weight, bearing Steel hardness, strength, through the toughness, and the effect of improving the durability, fatigue strength and fatigue life, and to enable the bearing Steels high strength, light weight and Park Yukhwa of about 20%, such as automotive Ensuring freedom, and that the effect of reducing the manufacturing cost of bearing steel and to a production method thereof.