Thursday 19 June 2014

Innovative Solutions To The Ductile Iron Concept

The performance and durability of a machine depends on the quality of parts integrated into them. ADI is a group of material whose mechanical properties can be different over a wide range by a suitable heat treatment choice. A high temperature produces ADI with high ductility, a yield strength with impact strength and good fatigue. A lower transformation temperature results in ADI with very high hardness, high yield strength, contact fatigue strength and excellent water resistance.

Austempered Ductile Iron is also known as Ausferitic ductile iron. It is the most recent addition to the ductile family. It is produced by giving a special austempering treatment to the conventional ductile iron. ADI retains high toughness and high elongation and it is twice strong as the pearlitic ductile iron.  This combination gives a material with fatigue strength and superior wear resistance to the ductile iron, forged and cast aluminum and forged and cast steels.    

For a designer, Austempered Ductile Iron is the most versatile material, enabling innovative solutions to the current and new problems. It competes favorably with the steel forgings, especially for the heavy duty parts where reliability is major requirement. ADI is cost effective, when particularly strength is required. Fatigue strength is fifty percent higher and it can be increased by fillet rolling and shot peening. With it's high strength to weight ratio ADI can also replace aluminum when the reduced section sizes are acceptable. Nearly, after the sixty years, the ADI is still generally regarded as a “NEW MATERIAL”.  ADI can give a range of properties unequaled  by any other material.

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