Austempered Ductile Iron: Possible Usage for Parts in the Trucking Industry

Paper #:
  • 973227

Published:
  • 1997-11-17
Citation:
Ahlstrand, V., "Austempered Ductile Iron: Possible Usage for Parts in the Trucking Industry," SAE Technical Paper 973227, 1997, https://doi.org/10.4271/973227.
Pages:
8
Abstract:
Austempered Ductile Iron (A.D.I.) is an engineering material gaining wide acceptance by designers of Automobile Components, Agricultural Equipment, Railroad Parts, Mining Tools, Transportation Equipment, and General Machinery. A.D.I, has a unique microstructure which enables it to display remarkable mechanical properties for a low manufacturing cost. The A.D.I. technology involves two processes: A) A good quality ductile casting, free of shrinkage voids and eutectic carbides, with closely controlled chemistry and graphitic nodule count. B) An austempenng heat treatment cycle which consists of austenitizing and an isothermal quench. The success of austempered ductile iron as an engineering material lies in its unique after heat treatment microstructure which consists of acicular ferrite mixed with high carbon stable austenite. Due to the differences between the metallurgies of cast iron and steel, this structure does not occur in commonly used steels.
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