The surfacing technologies are used for constitution of protection layer against wear and is destined for obtaining coating with high hardness. Among many weldings methods currently used to obtain the hard surface layer one of the most effective way of hardfacing is using flux cored arc welding. This additional material gives more possibilities to make expected hard surface layer.
Chemical composition, property and economic factors obtained in flux cored wire are much richer in comparison to these obtained with other additional materials. This is the reason why flux cored wires give possibilities of application this kind of material for improving surface in different sectors of industry.
In the present paper the imperfection in the layers was used for hardfacing process in different situations to show the possible application in the surface layer. The work presents studies of imperfection of the welds, contains the picture of microstructures, macrostructures and shows the results of checking by visual and penetrant testing methods.
 Bęczkowski, R. & Gucwa, M. (2015). Qualifying of hardfacing surfacing layers operating under conditions of the cement industry, Welding Technology Review. 87(9), 43-46.
 Bęczkowski, R. & Gucwa, M. (2014). The impact of the current settings to change the size of the geometric cross-section welds. Welding Technology Review. 86, 72-76.
 Gucwa, M. & Bęczkowski, R. (2014). The effect of heat input on the geometric properties of welded joints. Archives of Foundry Engineering. 14(spec.1), 127-130.
 Gucwa, M. & Winczek, J. (2015). The properties of high chromium hardfacings made with using pulsed arc. Archives of Foundry Engineering. 15(spec.1), 37-40.
 Winczek, J. (2003). The temperature field in steel side link-of stripper bucket during oscillation rebuilding. Archives of Foundry. 3(10), 267-272.
 Bober, M. & Tabota, K. (2015). Study significance of the impact of the basic parameters of plasma surfacing on the geometry of the weld overlays. Welding Technology Review. 87, 24-28.
 Buytoz, S. & Yildirim, M.M. (2010). Microstructure and abrasive wear properties of M(Cr,Fe)7C3 carbides reinforced high-chromium carbon coating produced by gas tungsten arc weldign (GTAW) process. Archives of Foundry Engineering. 10(spec.1), 279-286.
 Szajnar, J., Wróbel, P. & Wróbel, T. (2010). Multi-layers castings. Archives of Foundry Engineering. 10(1), 181-186.
 Fraś, E., Olejnik, E., Janas, A. & Kolbus, A. (2010). The morphology of TiC carbides produced in surface layers of carbon steel castings. Archives of Foundry Engineering. 10(4), 39-42.
 Suchoń, J., Strudnicki, A. & Przybył, M. (2010). Stereology of carbide phase in modified hypereutectic chromium cast iron. Archives of Foundry Engineering. 10(2), 169-174.
 Zikin, A., Hussainova, I., Katsich, C., Badisch, E. & Tomastik, C. (2012). Advanced chromium carbide-based hardfacings. Surface & Coatings Technology. 206, 4270-4278. DOI: 10.1016/j.surfcoat.2012.04.039.
 Veinthal, R., Sergejev, F., Zikin, A., Tarbe, R. & Hornung, J. (2013). Abrasive impact wear and surface fatigue wear behaviour of Fe–Cr–C PTA overlays. Wear. 301, 102-108. DOI:10.1016/j.wear.2013.01.077.
 Lai, H.H., Hsieh, C.C., Lin, C.M. & Weite, Wu. (2014). Effect of oscillating traverse welding on microstructure evolution and characteristic of hypoeutectic hardfacing alloy. Surface & Coatings Technology. 239, 233-239. DOI: 10.1016/j/surfcoat.2013.11.048.
 Qi, X., Jia, Z., Yang, Q. & Yang, Y. (2011). Effects of vanadium additive on structure property and tribological performance of high chromium cast iron hardfacing metal. Surface & Coatings Technology. 205, 5510-5514. DOI: 10.1016/j/surfcoat.2011.06.027.
 Klimpel, A. (2000). Cladding and thermal spraying – technologies. Warsaw: WNT. (in Polish).
 Klimpel, A., Dobrzański, L.A. & Janicki, D. (2015). A study of worn wear plates of fan blades of steel mill fumes suction system. Journal of Materials Processing Technology. 164-165, 1062-1067. DOI:10.1016/j.jmatprotec.2005.02.219.
 PN-EN ISO 6520-1:2009 Welding and allied processes. Classification of geometric imperfections in metallic materials. Part 1: Fusion welding.
 PN-EN ISO 5817:2014-05 Welding. Fusion-welded joints in steel, nickel, titanium and their alloys (beam welding excluded). Quality levels for imperfections.
 PN-EN ISO 17635:2011 Non-destructive testing of welds. General rules for metallic materials.
 PN-EN ISO 17637:2011 Non-destructive testing of welds. Visual testing of fusion-welded joints.