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ADI (Austempered Ductile Iron) - a bainitic ductile iron in which the resulting structure is obtained by the isothermal decay of austenite in the bainite region is currently a very promising material, which has a very wide application in various industries. It is characterized by a particularly favorable combination of strength and ductility, which exceeds the properties of heat-treated steels in the strength range of 800 - 1500 MPa. Its production is problematic because the ferritic or ferritic-pearlitic SGI (sph...