On the austempering behaviour and toughness of austempered engineering grade ductile iron castings

Kisakurek S., Ozel A., Yalcin Y., Turk A., Akbulut H., Okumus S.

70th World Foundry Congress 2012, WFC 2012, Monterrey, Meksika, 25 - 27 Nisan 2012, ss.546-558, (Tam Metin Bildiri) identifier

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Basıldığı Şehir: Monterrey
  • Basıldığı Ülke: Meksika
  • Sayfa Sayıları: ss.546-558
  • Anahtar Kelimeler: Austemperability, Austempered ductile iron, Austempering, Austenite, Bainite, Bainitic ductile iron, Hardenability, Toughness
  • Manisa Celal Bayar Üniversitesi Adresli: Evet

Özet

Austempering behaviour of engineering grade ductile iron castings have been studied by measuring the effects of the as-cast structure, the chemical composition, nodule count and the heat treatment parameters, austenitising temperature, austenitising time, austempering temperature and austempering time, on the hardness, impact touhness and microstructure developments in austempering process Method of factorial experimentation was employed to identify the relative effects of the heat treatment parameters on toughness variations, as well as, changes occurred in nodular characteristics during austempering. Finally, results of part of the studies on ductile/brittle transition behaviour of austempered GGG40 and GGG80 grade castings were briefly presented.