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THE EFFECT OF THE SOFTENING ANNEALING AND OF NORMLIZING ON THE CAVITATION EROSION RESISTANCE OF NODULAR CAST IRON FGN 400-15

1 BENA Traian
Co-authors:
2 MITELEA Ion 3 BORDEASU Ilare 4 CRACIUNESCU Cornel
Institutions:
1 „Politehnica“ University of Timisoara, Timisoara, Romania, EU, traian2461@yahoo.com
2 „Politehnica“ University of Timisoara, Timisoara, Romania, EU, ion.mitelea@upt.ro
3 „Politehnica“ University of Timisoara, Timisoara, Romania, EU, ilarica59@gmail.com
4 „Politehnica“ University of Timisoara, Timisoara, Romania, EU, craciunescucm@yahoo.com
Conference:
25th Anniversary International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 25th - 27th 2016
Proceedings:
Proceedings 25th Anniversary International Conference on Metallurgy and Materials
Pages:
653-658
ISBN:
978-80-87294-67-3
ISSN:
2694-9296
Published:
14th December 2016
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
423 views / 219 downloads
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Abstract

This paper analyzes, by comparison, the cavitation erosion resistance of the samples treated through softening annealing at 710 ± 10 °C with the purpose of partial spheroidization of pearlite and decomposition of free cementite traces from the microstructure, respectively the samples treated through normalizing at 860 ± 10 °C with the purpose of the pearlite proportion increasing and the cavitation erosion resistance improving. Cavitation tests were conducted on a vibrating device with piezo-ceramic crystals, following standard rules ASTM G32-2010.The microstructure characterization of the heat treated and eroded by cavitation was made by optic microscopy, and scan electronic microscopy.The obtained results show an improvement of cavitation erosion resistance after the application of the heat treatment for normalizing as a follow-up of the structure finishing and growing of the pearlite proportion in the base matrix.

Keywords: Heat treatment, cavitation erosion, microstructure, nodular cast iron.

© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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