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CAVITATION EROSION BEHAVIOR OF LASER NITRIDED 34CRNIMO6 ALLOYED STEEL

1 GHERA Cristian
Co-authors:
2 MITELEA Ion 3 BORDEAŞU Ilare 4 CRĂCIUNESCU Corneliu
Institutions:
1 „Polytechnica“ University of Timisoara, Timisoara, Romania, EU, cghera@yahoo.com
2 „Polytechnica“ University of Timisoara, Timisoara, Romania, EU, ion.mitelea@upt.ro
3 „Polytechnica“ University of Timisoara, Timisoara, Romania, EU, ilarica59@gmail.com
4 „Polytechnica“ 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:
706-711
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:
470 views / 260 downloads
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Abstract

Some surface treatments that apply to the hydraulic equipment components, which operated at high hydrodynamic loads, in which appear the phenomenon of erosion by cavitation, shall be listed and laser nitriding. Before that operation, the steel was undergone thermal annealing treatments for improving machinability cutting, followed by martensitic quenching and a tempering to high temperature. By changing the laser beam power are changes the layer thickness enriched in nitrogen and thus the resistance to erosion by cavitation. The cavitation tests, carried out in accordance with the requirements of ASTM G32-2010 standards, followed by hardness measurements with micro-hardness HV0.3 and optical and electronic metallographic investigations, justifies the increasing resistances to erosion by cavitation of nitrided layer, compared with the volume heat treatment.

Keywords: Laser nitriding, erosion by cavitation, 34CrNiMo6 steel

© 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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