Various inexpensive rolling elements for use under high interface pressure
such as induction hardened gears are provided, which have improved
seizure resistance at tooth flanks and a temper hardness of HRC 50 or
more at 300 .degree. C. To this end, a rolling element is made from a
steel material which contains at least 0.5 to 1.5 wt % carbon and 0.2 to
2.0 wt % one or more alloy elements selected from V, Ti, Zr, Nb, Ta and
Hf; and in which 0.4 to 4.0% by volume one or more compounds selected
from the carbides, nitrides and carbonitrides of the above alloy elements
and having an average particle diameter of 0.2 to 5 .mu.m are dispersed.
In such a rolling element, the soluble carbon concentration of a
martensite parent phase of a rolling contact surface layer is adjusted to
0.3 to 0.8 wt %, the martensite parent phase having been subjected to
induction hardening and low temperature tempering, and one or more of the
above carbides, nitrides and carbonitrides are dispersed in an amount of
0.4 to 4.0% by volume within the martensite parent phase.