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Bainitic Cast Irons with Nanosized Particles

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Abstract:

In the present study austempered ductile irons (ADI) with lower bainitic structure are investigated. Nanosized particles (50nm) of titanium carbonitride + titanium nitride TiCN+TiN and titanium nitride TiN are added to the casting volume. The samples microstructure is studied by optical metallography and X-Ray analysis. The influence of the nanosized additives on the kinetics of the bainitic transformation and on the morphology of the bainitic structure is investigated. The abrasive wear testing, hardness measurements and impact strength are carried out. It is established that the presence of nanoadditives in the bainitic cast irons leads to the changes in their microstructure which increases their mechanical characteristics and abrasive wear resistance. The studied nanocomposite materials expand the potential for new ADI applications in the industry.

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Periodical:

Materials Science Forum (Volume 994)

Pages:

104-111

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.994.104

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Online since:

May 2020

Authors:

Julieta Atanasova Kaleicheva*, Valentin Plamenov Mishev, Zdravka Kirilova Karaguiozova

Keywords:

Austempered Ductile Irons, Hardness, Lower Bainite, Nanoparticles, Retained Austenite, Titanium Carbonitride, Titanium Nitride, Wear Resistance

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© 2020 Trans Tech Publications Ltd. All Rights Reserved

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