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Materials Science

, Volume 40, Issue 4, pp 523–528 | Cite as

Austempering of spheroidal graphite cast iron

  • Z. M. El-Baradie
  • M. M. Ibrahim
  • I. A. El-Sisy
  • A. A. Abd El-Hakeem
Article

Abstract

We study gray spherulitic cast iron, its microstructure, hardness ultimate strength in tension, elongation, and impact toughness as functions of the duration of isothermal austenitizing in the bainite region at 350 and 400°C after austenitizing at 900°C. As the temperature of quenching increases from 350 to 400°C, the microstructure of the analyzed cast iron changes from lower to higher bainite and the amount of retained austenite increases (its maximum is attained after 1 h). At the same time, the ultimate strength in tension and hardness decrease, whereas the elongation and fracture toughness increase.

Keywords

Microstructure Austenite Fracture Toughness Cast Iron Bainite 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media, Inc. 2004

Authors and Affiliations

  • Z. M. El-Baradie
    • 1
  • M. M. Ibrahim
    • 1
  • I. A. El-Sisy
    • 1
  • A. A. Abd El-Hakeem
    • 1
  1. 1.Faculty of EngineeringCairo UniversityCairoEgypt

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