STEEL PIPE FOR BEARING ELEMENTS, AND METHODS FOR PRODUCING AND CUTTING THE SAME

摘要

Steel tubes for bearing element parts according to the present invention, wherein the specific compositions are limited and an accumulation intensity of ä211ü face along with an impact property at ambient temperature in the longitudinal direction of steel tube are specified, can be provided as a source material for bearing element parts, which have excellent machinability and fatigue life in rolling contact, being incorporated without adding a free-cutting element specifically nor without reducing productivity since the spheroidizing for the same annealing duration with that of conventional spheroidizing treatment can be applied. Accordingly, by applying a manufacturing method or a cutting-machining method according to the present invention, bearing element parts such as races, rollers and shafts can be produced with less cost and efficiently.