FABRICATION OFIN SITUFe-Ti-BCOMPOSITE COATING BY LASER CLADDING

Baoshuai Du ()
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Baoshuai Du: Shandong Electric Power Research Institute, Shandong Electric Power Corporation, Jinan 250002, China

Surface Review and Letters (SRL), 2013, vol. 20, issue 03n04, 1-8

Abstract: Laser cladding was applied to depositin situFe-Ti-Bcomposite coatings on mild carbon steel with precursor of ferrotitanium, ferroboron and pureFealloy powders. The composite coatings were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and electron probe microanalysis (EPMA). Wear resistance of the laser-claddedFe-Ti-Bcoatings was evaluated under dry sliding condition at room temperature using block-on-ring wear tester. Results indicate thatin situreinforcements ofTiB2andFe2Bcan be synthesized in theFe-Ti-Bcoatings. The amount ofTiB2increases with the increase of content of ferrotitanium and ferroboron in the precursor. Reinforcements are formed through the liquid-precipitation route following the solidification path of theFe-Ti-Bsystem. Hardness and wear properties of the coatings improved significantly in comparison to the as-received substrate due to the presence of hard reinforcements.

Keywords: Laser Cladding; in situ; coating; Fe-Ti-B (search for similar items in EconPapers)
Date: 2013
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DOI: 10.1142/S0218625X13500340

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