BEARING STEEL BEING EXCELLENT BOTH IN WORKABILITY AFTER SPHEROIDIZING-ANNEALING AND IN HYDROGEN FATIGUE RESISTANCE PROPERTY AFTER QUENCHING AND TEMPERING

摘要

to mass%, C: 0.85~1.10%, Si: 0.30~0.80% , Mn: 0.90~2.00%, P: less than 0.025%, S: less than 0.02%, Al: 0.05% or less, Cr: 1.8 to 2.5%, Mo: 0.15~0.4%, N: 0.0080% or less, and O: 0.0020% include the following, and further Sb: 0.0015 contains at%, not more than 0.0050%, by glass blowing a steel composition consisting of Fe and unavoidable impurities, to suppress the formation of WEA effectively even in environments screen that hydrogen attack, electric it is possible to improve the fatigue life, and cutting performance and only the composition of the material ( ), and also as well as improved processability, such as, visualization ( ) excellent in workability after annealing, and within the referred to and after tempering ( ) Bearing steel provides excellent fatigue properties of hydrogen. ;