EFFECT OF MICROSTRUCTURE ON THE EROSIVE WEAR RATE OF AISI 1020 AND AISI 8620 STEELS

Dağaşan Bulucu E., Odabaş D., Gerçekcioğlu E.

11th International Conference on Tribology, Belgrade, Sırbistan, 13 - 15 Mayıs 2009, cilt.1, sa.1, ss.64-67, (Tam Metin Bildiri)

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Cilt numarası: 1
  • Basıldığı Şehir: Belgrade
  • Basıldığı Ülke: Sırbistan
  • Sayfa Sayıları: ss.64-67
  • Erciyes Üniversitesi Adresli: Evet

Özet

In this study low carbon and low alloyed AISI 1020 and AISI 8620 steels were used to explore the effect of micrsostructure on the erosive wear rate of steels. 3 different heat treatments were applied to 2 mm. thick disks of as-received specimens so that 3 different microstructures were obtained. Applied heat treatment steps can be summarized as homogenization + normalization, dual phase heat treatment (partial austenization at temperatures between AC1 and AC3 and rapid cooling in a brine solution at – 10 °C) and quenching (austenization at higher temperatures than AC3 and quenching in a brine solution at – 10 °C). After these steps pearlitic +ferritic, ferritic +martensitic and fully martensitic microstructures were obtained.

 

On the other hand, erosive wear tests were carried out at a constant impact angle of 90 ° and at a constant impact velocity of 30 m/sec for time periods of 240 seconds. As a result, it was observed that pearlitic+martensitic microstructures of both steels have the maximum mass loss and erosive wear rates while the fully martensitic structures have the smallest values. That case is mainly because of the existence of martensite phase and its increasing effect on the hardness of specimens.