Mechanical Properties of HVOF Sprayed, Flame and Laser Remelted NiCrBSi Coatings

Abstract:

The influence of thermal post-treatment by means of flame and laser energy on the mechanical properties of NiCrBSi coating was studied. The evaluation was done in terms of microstructure, surface hardness, microhardness and instrumented indentation. The microstructure evaluation showed an increase of coatings inner cohesion, together with the creation of metallurgical bond between the coating and the substrate material. In the the case of laser remelted coating, the creation of thick transition layer responsible for lower measured microhardness and hardness value was proved.

• Periodical: Key Engineering Materials (Volume 606)
• Pages: 179-182
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.606.179
• Online since: March 2014
• Authors: Šárka Houdková*, Eva Smazalová, Olga Bláhová, Marek Vostřák
• Keywords: Coating, Hardness, HVOF, Laser, Nanoindentation, NiCrBSi, Post-Treatment

References

[1] N. Serres, F. Hlawka, L. Costil, C. Langlade, F. Mach, An investigation of the mechanical properties and wear resistance of NiCrBSi coatings carried out by in situ laser remelting, Wear 270 (2011) 640-649.

DOI: 10.1016/j.wear.2011.01.025

[2] C. Navas, R. Colaco, J. de Damborenea, R. Vilar, Abrasive wear behaviour of laser clad and flame sprayed-melted NiCrBSi coatings , Coat. Surf. Technol. 200 (2006) 6854-6862.

DOI: 10.1016/j.surfcoat.2005.10.032

[3] R. Gonzáles, M. Cadenas, R. Fernández, J.L. Cortizo, E. Rodrígues, Wear behaviour of flame sprayed NiCrBSi coating remelted by flame or by laser, Wear 262 (2007) 301-307.

DOI: 10.1016/j.wear.2006.05.009

[4] M. Vostřák, M. Hruška, Š. Houdková, Laser remelting of HVOF sprayed NiCrBSi coating, proceeding of conference METAL 2013, 15-17. 5. 2013, Brno, Czech Republic, (2013).

[5] I. Hemmati, V. Ocelík, J. Th.M. De Hosson, Dilution effects in laser cladding of Ni-Cr-B-Si-C hardfacing alloys, Material Letters 84 (2012) 69-72.

DOI: 10.1016/j.matlet.2012.06.054