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AISI 52100 is a well-known and commonly used bearing
steel in manufacturing industry, today. The wear phenomenon in
this type of steel may play a critical role in service life. Likewise a
bearing steel part running under heavily dynamic loads could be
out of service in a short time when tribological conditions
particularly turned into boundary film lubrication or even worse
into unlubricated condition etc. On the other hand, their
tribological properties can be enhanced by heat treatment
conditions. Thus the service life can be extended since they became
more wear resistant. However hardness and wear resistance are
normally increased at expense of toughness which is another key
factor in bearing steels. Therefore it is important that optimizing
heat treatment conditions in terms of not only hardness and wear
resistance but also toughness. In this study, the tribological
properties of three groups of AISI 52100 bearing steel specimens
heat treated in different conditions were compared in terms of
wear volume, wear factor, hardness and friction coefficient values.
For this purpose dry sliding tests were performed in according to
ASTM G99-05 standard using a “ball-on-disk” type equipment.
The results showed that tempered martensitic specimens heat
treated at relatively higher temperatures yielded almost same
wear characteristics with harder and less tougher specimens
under given tribological conditions.
International Iron & Steel Symposium
UDCS
Enbiya Türedi
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