Micropitting has become a major concern in certain classes ofindustrial gear applications, especially wind power and otherrelatively highly loaded somewhat slow speed applications,wherecarburized gears are used to facilitatemaximum load capacity in acompact package. While by itself the appearance of micropittingdoes not generally causemuch perturbation in the overall operationof a gear system, the ultimate consequences of a micropittingfailure can, and frequently are, much more catastrophic.
Micropitting is most often associated with parallel axis gears(spur and helical) however, the authors have also found this typeof distress when evaluating damage to carburized, hardened and hardfinished spiral bevel gears.
This paper presents a discussion of the initiation, propagationand ultimate tooth fracture failure mechanism associated withamicropitting failure. The subject is presented byway of thediscussion of detailed destructive metallurgical evaluations ofseveral example micropitting failures that the authors haveanalyzed on both parallel axis and bevel gears.
- Edition:
- 09
- Published:
- 09/01/2009
- Number of Pages:
- 12
- File Size:
- 1 file , 1 MB
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