Contact fatigue of carbon steel gear under different lubrication
- Shengnan Zhang,
- Ming YAN,
- Yushi Wang
Shenyang University of Technology
Corresponding Author:email@example.comAuthor Profile
AbstractThe contact fatigue of carbon steel gear tooth surfaces under different
lubrication conditions has been investigated and a model of the effect
of lubrication conditions on contact fatigue has been established.
Electrochemical corrosion forms nonferrous oxide on the tooth surface,
and the crack corrosion between the nonferrous oxide and the Fe matrix
may become the initiation point for contact fatigue. High temperature
generated by frictional heat can accelerate the plastic deformation.
Micro damage less than Hertzian contact is more likely to expand into
macro pitting. The pressure around the micro damage increases when the
micro damage partially coincides with the contact width, so the tooth
surface around the pit is more likely to produce new pits, and then form
the superposition and aggregation. The larger the lubricating oil
supply, the larger the contact width, and the larger the width of the
micro damage can be activated, the improvement of lubrication can
promote the propagation of micro damage.