CHEMISTRY, METALLURGY AND MECHANISM OF MICROSTRUCTURAL TRANSFORMATION IN HADFIELD STEEL, HIGH CHROMIUM CAST IRON AND AUSTEMPERED DUCTILE IRON

1 BHERO Shepherd
Co-authors:
2 NAVARA Erik
Institutions:
1 Department of Chemical, Materials and Metallurgical Engineering, Botswana International University of Science and Technology, bheros@biust.ac.bw
2 Emeritus Professor of Metallurgy, Na Clunku 21, Cz-586 01 Jihlava, Czech Republic, eriknavara@gmail.com
Conference:
26th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 24th - 26th 2017
Proceedings:
Proceedings 26th International Conference on Metallurgy and Materials
Pages:
117-125
ISBN:
978-80-87294-79-6
ISSN:
2694-9296
Published:
9th January 2018
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
32 views / 25 downloads
Abstract

Three ferrous materials; Hadfield steel, high chromium white cast iron and austempered ductile iron (ADI) exhibit a similar phenomenon in which soft stabilised austenite transforms to hard martensite on the worked surface. This property is desirable in applications where toughness is required in the bulk of the component while the surface needs to be hard-wearing. Thus, the microstructure of the component may consist of meta-stable austenite, which is meant to change to martensite by strain-induced transformation as a result of impact or wearing loads applied to the surface. The chemistry of alloys is very different while the metallurgy and transformation mechanisms are closely similar. In this paper, the differences, similarities as well as the most appropriate applications of the materials are discussed.

Keywords: Hadfield, chromium, ADI, austenite, martensite
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