High-speed laser cladding of chromium carbide reinforced Ni-based coatings

Fusion-bonded and low-diluted overlay welded coatings are frequently very thick (>1mm). High-speed laser cladding is a novel process capable of producing thin fusion-bonded and low-diluted coatings with high coverage rates and low heat input. In this study, for the first time, high-speed laser cl...

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Bibliographic Details
Published in:	Welding in the world Vol. 67; no. 9; pp. 2175 - 2186
Main Authors:	Tuominen, Jari, Kiviö, Jouko, Balusson, Clara, Raami, Lassi, Vihinen, Jorma, Peura, Pasi
Format:	Journal Article
Language:	English
Published:	Berlin/Heidelberg Springer Berlin Heidelberg 01-09-2023 Springer Nature B.V
Subjects:	Abrasion resistant coatings Chemistry and Materials Science Chromium carbide Chromium plating Diamond pyramid hardness Dilution Electron backscatter diffraction Electrons High speed High strength steels Laser beam cladding Laser beam welding Lasers Materials Science Metallic Materials Nickel coatings Protective coatings Quenching and tempering Research Paper Solid Mechanics Theoretical and Applied Mechanics Ultrafines Wear resistance Hard-chrome Three-body abrasion High-speed laser cladding Hardfacing Metal matrix composite
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Summary:	Fusion-bonded and low-diluted overlay welded coatings are frequently very thick (>1mm). High-speed laser cladding is a novel process capable of producing thin fusion-bonded and low-diluted coatings with high coverage rates and low heat input. In this study, for the first time, high-speed laser cladding was used to fabricate relatively thin Ni-based coatings reinforced with chromium carbides onto low-alloy structural and quenched and tempered steels. Obtained coatings were characterized with X-ray diffraction (XRD), optical (OM), and scanning electron microscopy (SEM), as well as electron backscatter diffraction (EBSD). Mechanical and wear properties were tested with Vickers microhardness measurements and three-body dry-sand rubber wheel abrasion tests (RWAT). It was shown that high-speed laser cladding produces 0.2–0.3-mm-thick coatings, which consist of ultrafine-substructured hypereutectic M 7 C 3 structures reinforced with coarser primary Cr 3 C 2 particles. Coatings with hardness up to 1300 HV 0.05 exhibited high wear resistance in low-stress three-body abrasion. Coatings developed can be used as alternatives for hard-chrome plated coatings.
ISSN:	0043-2288 1878-6669
DOI:	10.1007/s40194-023-01557-9