Corrosion resistance of laser-borided Inconel 600 alloy

• Autorzy: Dziarski P. , Kulka M. , Makuch N. , Mikołajczak D.

Identyfikatory

DOI

10.15199/28.2017.3.7

Warianty tytułu

PL

Odporność na korozję borowanego laserowo stopu Inconel 600

• Języki publikacji: EN

Abstrakty

EN

Inconel 600 alloy is used extensively for a variety of industrial applications involving high temperature and aggressive environments. However, under conditions of appreciable mechanical wear (adhesive or abrasive), this material has to be characterized by suitable wear protection. The diffusion boronizing efficiently improved the tribological properties of this alloy. Nevertheless, the long duration of this process was necessary in order to obtain the layers of the thickness up to about 100 μm. In this study, instead of the diffusion process, the laser alloying with boron was used for producing a boride layer on Inconel 600 alloy. During this process, the external cylindrical surface of base material was coated by paste, including amorphous boron, and remelted by a laser beam. In the remelted zone, the three areas were observed: compact borides zone consisting of nickel and chromium borides (close to the surface), zone of increased percentage of Ni–Cr–Fe matrix (appearing in the greater distance from the surface) and zone of dominant percentage of Ni–Cr–Fe matrix (at the end of the layer). The hardness was comparable to that-obtained in case of diffusion boriding. Simultaneously, the laser-borided layer was significantly thicker. In order to evaluate the corrosion behaviour, the immersion corrosion test in a boiling solution of H2O, H2SO4 and Fe2(SO4)3 was used. As a consequence of selective laser alloying, the difference in electrochemical potentials between the layer and base material caused the accelerated corrosion of the substrate in areas without laser-borided layer. The results showed that laser-borided Inconel 600 alloy could be characterized by the excellent corrosion resistance in such corrosive solution if the whole surface would be covered with laser-alloyed layer.

PL

Celem pracy było wytworzenie warstwy borków na stopie niklu Inconel 600 z zastosowaniem laserowego stopowania borem oraz ocena odporności korozyjnej stopu z wytworzoną warstwą. Warstwa ta powinna charakteryzować się zwiększoną odpornością na zużycie mechaniczne (adhezyjne lub ścierne) oraz wykazywać znaczną odporność na działanie agresywnego środowiska. Borowanie dyfuzyjne skutecznie poprawia właściwości tribologiczne tego stopu, jednak do uzyskania warstwy o grubości ok. 100 μm dotychczas był potrzebny długi czas procesu. Zamiast tradycyjnego procesu dyfuzyjnego w pracy do wytworzenia warstwy borków na stopie Inconel 600 zastosowano nowoczesną, bardziej ekologiczną metodę laserowego stopowania borem.

Słowa kluczowe

EN

laser boriding; Inconel 600 alloy; microstructure; hardness; corrosion resistance

PL

borowanie laserowe; Inconel 600; mikrostruktura; twardość; odporność na korozję

• Wydawca: Wydawnictwo SIGMA-NOT
• Czasopismo: Inżynieria Materiałowa
• Rocznik: 2017
• Tom: Vol. 38, nr 3
• Strony: 149--156
• Opis fizyczny: Bibliogr. 20 poz., fig.

Twórcy

autor

Dziarski P.

• Institute of Materials Science and Engineering, Poznan University of Technology, Poznan

autor

Kulka M.

• Institute of Materials Science and Engineering, Poznan University of Technology, Poznan

autor

Makuch N.

• Institute of Materials Science and Engineering, Poznan University of Technology, Poznan

autor

Mikołajczak D.

• Institute of Materials Science and Engineering, Poznan University of Technology, Poznan

Bibliografia

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Uwagi

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).