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Published in: Metallography, Microstructure, and Analysis 4/2023

25-05-2023 | Peer-Reviewed Paper

Wear Behavior and Microstructure Changes of a High Chromium Cast Iron: The Combined Effect of Heat Treatment and Alloying Elements

Authors: Rim Chaima Touhami, Said Mechachti, Khedidja Bouhamla, Ali Hadji, Abdelkader Khettache

Published in: Metallography, Microstructure, and Analysis | Issue 4/2023

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Abstract

The microstructure and wear behavior of a manganese and niobium alloyed high chromium cast iron were examined and compared to an as-cast chromium cast iron. Three heat treatments were applied: quenching at 930, 980 and 1030 °C followed by tempering at 250 °C. The microstructures were characterized by optical and scanning electron microscopy equipped with an energy dispersive spectrometer. The Vickers microhardness (HV) were measured. X-ray diffraction tests were carried out in order to identify the nature of the existing crystallographic phases in each studied sample. The tribological behavior was studied in the dry state under a load of 10 N at room temperature. The friction coefficient was recorded. The wear mechanism of the investigated is observed by optical microscopy. The obtained results show that the as-cast microstructure of the studied chromium cast iron samples consists of an austenitic matrix and a complex eutectic carbide network of M7C3 type. The applied heat treatments have affected the microstructure and have promoted the formation of martensite, retained austenite and secondary precipitations. The addition of niobium and manganese also shows a refinement on the microstructure, this effect is observed on the dimensions of the dendrites which appear finer in the chromium cast iron alloyed with Mn and Nb.

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Metadata
Title
Wear Behavior and Microstructure Changes of a High Chromium Cast Iron: The Combined Effect of Heat Treatment and Alloying Elements
Authors
Rim Chaima Touhami
Said Mechachti
Khedidja Bouhamla
Ali Hadji
Abdelkader Khettache
Publication date
25-05-2023
Publisher
Springer US
Published in
Metallography, Microstructure, and Analysis / Issue 4/2023
Print ISSN: 2192-9262
Electronic ISSN: 2192-9270
DOI
https://doi.org/10.1007/s13632-023-00976-w

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