Microstructure, Microhardness, Corrosion Resistance and Chemical Composition of Mo, B and Mo-B Coatings Produced Using Laser Processing

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  • Additional Information
    • Publication Information:
      MDPI AG, 2020.
    • Publication Date:
      2020
    • Abstract:
      The paper presents study results of laser alloying of CT90 tool steel with an applied pre-coat of boron, molybdenum or a mixture of these elements. Pre-coats were applied on steel substrates in the form of a paste. The aim of the study was to investigate the microstructure, chemical and phase composition, microhardness and corrosion resistance of these newly-formed coatings. The laser alloying process was carried out using a diode laser with a nominal power of 3 kW. In this study a laser beam power of 900 W and a scanning speed of 48 mm/s were used. As a result of the laser beam action, the presence of three areas was observed in cross-sections of specimens: a remelted zone, a heat affected zone and the substrate. The properties of coatings enriched with both molybdenum and boron were better than those of the steel substrate, but only the use of a Mo-B mixture resulted in a significant improvement in microhardness and corrosion resistance.
    • File Description:
      application/pdf
    • ISSN:
      1996-1944
    • Online Access:
      https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5c7d60be86d7fa063d559619fa49021e
      https://www.mdpi.com/1996-1944/13/15/3249/pdf
    • Rights:
      OPEN
    • Accession Number:
      edsair.doi.dedup.....5c7d60be86d7fa063d559619fa49021e