Increasing the Surface Hardness of Cast Iron by Electrodeposition of Borides in Molten Salts

• Autorzy: Al-Azzawi A. H. , Sytchev J. , Baumli P.

Identyfikatory

DOI

10.1515/amm-2017-0144

• Języki publikacji: EN

Abstrakty

EN

In this paper the electrodeposition of boron on the surface of cast iron as a coating is applied to increase the hardness and protect the substrate against abrasive wear. The boron containing coating was synthesized by electrodeposition process from a NaCl-KCl (1:1 mol)-10 w%NaF-10w% KBF4 molten salt. The effect of electrolysis parameters (temperature and time) on the hardness is presented; the current density varied in the range –37 – –4.5 mA/cm², allowing perfect coverage of and respect for dimensions. The electrochemical process was carried out at different temperatures (750°C-900°C) and for different periods of time (5-10 hours). Depending on the current density and duration of electrolysis, the deposits consist of FeB or Fe₂B. Microhardness measurements across the boride layer indicated very high hardness values (between 1600 and 2100 HV0.05).The structure of the boride layer is linked to its boron content and thermal history: as-deposited coatings present very small grain sizes and can be considered as nearly amorphous.

Słowa kluczowe

EN

electrodeposition; boron; cast iron

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2017
• Tom: Vol. 62, iss. 2B
• Strony: 1015--1018
• Opis fizyczny: Bibliogr. 8 poz., rys.

Twórcy

autor

Al-Azzawi A. H.

• University of Miskolc, Department of Nanotechnology, Miskolc-Egyetemváros, H-3515, Hungary

autor

Sytchev J.

• University of Miskolc, Department of Nanotechnology, Miskolc-Egyetemváros, H-3515, Hungary
• Gedeon Richter Plc., 19-21 Gyömrői St., Budapest, Hungary, 1103

autor

Baumli P.

• University of Miskolc, Department of Nanotechnology, Miskolc-Egyetemváros, H-3515, Hungary
• Bay Zoltán Nonprofit Ltd. for Applied Research, Engineering Division (Bay-Eng), Iglói 2., Miskolc, H-3519, Hungary

Bibliografia

• [1] L. Segers, A. Fontana, R. Winand, Electrochimica Acta 36 (1), 41-47 (1991)
• [2] A. Bonomi, R. Habersaat, G Bienvenu, Surface Technology 6 (4), 313-319 (1978)
• [3] A. Girginov, T.Z. Tzvetkoff, M. Bojinov, Journal of Applied Electrochemistry 25 (11), 993-1003 (1995).
• [4] G. Kaptay, S.A. Kuznetsov, Plasmas & Ions 2 (2), 45-56 (1999).
• [5] H. Abe, K. Yoshii, K. Nishida, M. Imai, H. Kitazawa, Journal of Physics and Chemistry of Solids 66 (2-4), 406-409 (2005).
• [6] G. Kartal, S. Timur, C. Arslan, Journal of Electronic Materials 34 (12), 1538-1542 (2005).
• [7] Guldem Kartal Sireli, Encyclopedia of Iron, Steel, and Their Alloys, Chapter: Molten Salt Baths: Electrochemical Boriding, Publisher: CRC Press -Taylor & Francis Group, Editors: Rafael Colás, George E. Totten, DOI: 10.1081/E-EISA-120052671.
• [8] S.K. Putatunda, Materials Science and Engineering 315 (1-2), 70-80 (2001).

Uwagi

PL

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