INFLUENCE OF LASER PROCESSING ON THE MICROSTRUCTURE, MICROHARDNESS AND CORROSION RESISTANCE OF DIFFUSION BORONIZED LAYER PRODUCED ON 145CR6 TOOL STEEL

1 BARTKOWSKA Aneta
Co-authors:
2 BARTKOWSKI Dariusz 3 JURČI Peter 2 PRZESTACKI Damian
Institutions:
1 Poznan University of Technology, Faculty of Materials Engineering and Technical Physics, Poznan, Poland, EU, aneta.bartkowska@put.poznan.pl
2 Poznan University of Technology, Faculty of Mechanical Engineering, Poznan, Poland, EU, dariusz.bartkowski@put.poznan.pl, damian.przestacki@put.poznan.pl
3 Slovak University of Technology in Bratislava, Faculty of Materials Science and Technology in Trnava, Trnava, Slovakia, EU, p.jurci@stuba.sk
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:
833-839
ISBN:
978-80-87294-97-0
ISSN:
2694-9296
Published:
27th July 2020
Proceedings of the conference have already been published in Scopus and we are waiting for evaluation and potential indexing in Web of Science.
Metrics:
144 views / 64 downloads
Abstract

The paper presents the results of laser processing of diffusion boronized layer on 145Cr6 tool steel. The aim of the study was to investigate the microstructure, phase composition analysis, microhardness as well as corrosion resistance of the newly-formed layer. Boronized layer was produced at 950 °C by 6 h in mixture consisted of boron carbide B4C as a source of boron, kaolin as a filler and ammonium chloride as activator. Laser processing were conducted using 3 kW diode laser. As a result of influence the laser beam on the boronized layers the presence of three areas was observed: remelted zone, heat affected zone and substrate. The boronized layers after laser processing were characterized by high microhardness and good corrosion resistance. The zone enrich in boron was a 2-3 times thicker than diffusion boronized layer.

Keywords: Boronized layer, laser processing, microstructure, microhardness, corrosion resistance

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