The
austempering process is neither noval or new. It has been utilized on
cast and wrought steels since 1930's. This process of austempering on
ductile iron was first applied in 1972. The customer base of this
iron casting covers alloyed, Grey and ductile iron for decorative,
engineering, artistic and architectural sectors . These casting irons
are produced under current ISO standards of material specification.
These kind of irons castings also includes valves and pumps, rolling
mills and foundries, forges, aerospace and automotive, mines and
railways etc.
Ductile
iron is a type of cast iron, it is also known as ductile cast iron.
It is not a single material but is a part of group of materials that
can be produced to have a huge range of properties through the
control of micro-structure. The ductile iron is specifically useful
in automotive components. Austempered
Ductile Iron was
commercialized and gained success after 1950's and it's structure is
manipulated through the sophisticated heat treating process. The
austempering heat treatment converts the ductile iron to ADI. By
selecting the precise parameters for heat treatment, a specific set
of properties can be achieved.
The
Austempered Ductile Iron is
the latest addition in the family of ductile iron. It retains
toughness and high elongation. This combination provides a material
with superior fatigue strength and wear resistance to traditional
ductile iron. The mechanical properties of this iron are mainly
determined by the metal matrix. The ADI is finding an increasing
global market in automotive and other sections. It is much easier to
cast than steel.
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