LASER REMELTING OF NI-CR-RE PLASMA SPRAYING COATING

1 WĘGLOWSKI Marek Stanisław
Co-authors:
2 DWORAK Jerzy 3 DYMEK Stanisław 4 KALEMBA-REC Izabela 5 WRONA Adriana 6 KUSTRA Katarzyna 7 LIS Marcin
Institutions:
1 Łukasiewicz – Institute of Welding, Gliwice, Poland, EU, marek.weglowski@is.gliwice.pl
2 Łukasiewicz – Institute of Welding, Gliwice, Poland, EU, jerzy.dworak@is.gliwice.pl
3 AGH, Faculty of Metals Engineering and Industrial Computer Science, Krakow, Poland, EU, gmdymek@cyfronet.pl
4 AGH, Faculty of Metals Engineering and Industrial Computer Science, Krakow, Poland, EU, kalemba@agh.edu.pl
5 Łukasiewicz - Institute of Non-Ferrous Metals, Gliwice, Poland, EU, adrianaw@imn.gliwice.pl
6 Łukasiewicz - Institute of Non-Ferrous Metals, Gliwice, Poland, EU, katarzyna.kustra@imn.gliwice.pl
7 Łukasiewicz - Institute of Non-Ferrous Metals, Gliwice, Poland, EU, marcin.lis@imn.gliwice.pl
Conference:
29th International Conference on Metallurgy and Materials, Brno, Czech Republic, EU, May 20 - 22, 2020
Proceedings:
Proceedings 29th International Conference on Metallurgy and Materials
Pages:
846-851
ISBN:
978-80-87294-97-0
ISSN:
2694-9296
Published:
27th July 2020
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
472 views / 312 downloads
Abstract

The plasma spray technology allows spraying a wide variety of materials. Atmospheric plasma spraying (APS) consists in injecting a powder feedstock material in a plasma jet to melt and accelerate the injected particles and spray them onto a substrate. The coating growth is thus realized by the impingement and spreading of sprayed particles. This mechanism of coating formation induces the presence of pores and micro-cracks. In order to eliminate those drawbacks, laser remleting may be used to improve the properties and performances of plasma sprayed coatings. In the present paper, the Ni20%C + 20%Re coating fabricated by plasma spraying on stainless steel substrate were remelted by CO2 laser, and the effect of laser remelting on microstructure and hardness of plasma sprayed Ni20%Cr + 20%Re coating were studied. The microstructure of plasma sprayed and laser remelted coatings were analyzed using scanning election microscopy (SEM) and energy disperse spectroscopy (EDS). The micro-hardness of coating was measured using micro-hardness tester. The results show that the laser remelted coating becomes much denser moreover, the chemical composition of the coatings becomes homogeneous

Keywords: Coatings, rhenium, thermal spraying, laser remelting, microstructure

© 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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