Austempering retards pitting failure in ductile iron spur gears

  • Aslantaş K
  • Taşgetiren S
  • Yalçn Y
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Abstract

In this study, the effect of austempering process on pitting formation in spur gears made of ductile iron is analysed. A series of experiments are carried out to determine the pitting formation life. Gear test specimens were first austenitized in a salt bath at 900 °C for 90 min after which they were tempered in a salt bath at 250, 325, 375 and 425 °C for 60 and 90 min duration. All gear experiments were performed using FZG test machine. Pitting formation is investigated using scanning electron microscopy. It is concluded from the analysis that austempering contributes to the increase of pitting formation life. © 2004 Elsevier Ltd. All rights reserved.

Author-supplied keywords

  • Ductile iron
  • Fatigue testing
  • Gear-tooth failures
  • Hear treatment
  • Wear

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