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3 Zeszyty Naukowe. Mechanika / Politechnika Opolska

3 1999

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Relation of structure and mechanical properties of austempered ductile iron

Podrábský T., Věchet S., Kohout J.

Zeszyty Naukowe. Mechanika / Politechnika Opolska

1999

z. 59

91-94

The purpose of the study is to find out the relations among structure, mechanical properties, chemical composition and conditions of heat treatment of austempered ductile iron (ADI). The study is directed to obtain the best combination of strength and plastic properties of this ADI. Knowledge obtained from the study of mention characteristics creates the main basis for practical technical application of ADI. Sructure and mechanical properties of ADI are specially influenced by the conditions of heat treatment. Temperature and duration of the isothermal transformation has a special influence on the resulting structural mixture of ADI matrix and, therefore, in the same time on its mechanical properties [1]. In the study we concentrate to the structural - mechanical characteristics of ADI in dependence on the temperature of isothermal transformation in the range of 380 - 500 C.

Influence of transformation temperature on fatigue properties of ADI

Věchet S., Kohout J., Podrábský T.

Zeszyty Naukowe. Mechanika / Politechnika Opolska

1999

z. 59

87-90

Structure and mechanical properties of austempered ductile iron (ADI) are in a pronounced way influenced by the conditions of heat treatment. While conditions of austenitization are not manifested in a special way, coditions of isothermal transformation have a very substantial influence on the resulting structural matrix mixture, and so at the same time on its mechanical properties. In the work the influence of the temperature of isothermal transformation in the range 380-500 C above all on the fatigue properties of ADI is studied.

ADI - a prospective structural material

Dorazil E., Věchet S., Kohout J., Klakurková L.

Zeszyty Naukowe. Mechanika / Politechnika Opolska

1999

z. 59

103-106

Austempered ductile iron (ADI) presents relatively new high strength structural material with very good mechanical and technological properties along with relatively low price (see Fig. 1). This type of nodular cast iron is produced in wide measure not only in large and developed countries (U.S.A. - full half of world-wide production, Japan, China, Germany, Great Britain, France, Italy, Sweden etc.) but also in countries comparable with our country (Finland, Netherlands, Belgium etc.). Word-wide production per year exceeded 60,000 tons in 1995 [1], in 2005 already the production of 230,000 tons is expected (Fig. 2).