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Review of the Hard-Facing Technology Application for Reparation of the Given Parts in Various Branches of Industry

. Jovanović, M., Adamović, D., Lazić, V. (1996). Welding technology, handbook. Faculty of Engineering, University of Kragujevac, Kragujevac (in Serbian). Lazić, V., Jovanović, M. Rajačić, D., Josifović, D., Adamović, D. (1997). Surfacing of the truck lift hook. Welding and welded structures, 42(3), pp. 159-164. Lazić, V. (2001). Optimization of the hard-facing process from the tribological aspects of the hard-faced layers and residual stresses. PhD. Faculty of Mechanical Engineering, Kragujevac. Lazić, V., Jovanović, M

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Properties of Corrosive Coated Coatings Multi-Groove Hardfacing on Stainless Steel

Abstract

Using the pad welding technique it is possible to regenerate machine parts or improve surface properties such as abrasion, corrosion and aging resistance. To ensure optimum processing conditions and economic efforts should be made, while providing a high deposition efficiency for the small amount of metal in the pad weld substrate. The pad welding process for the test subject should be carried out by preheating to evaporate the moisture and reduce the porosity of the weld. This treatment is required depending on the carbon equivalent. The article presents the results of corrosion tests of multi-groove pads made with the MIG method on a steel substrate. The samples were made of C45E steel. The additional material was a wire made of stainless steel with the factory name CASTOMAG 4554S. The results of previously performed tests allowed determining the optimal process parameters at which we obtain the smallest share of the base material in the padding. Steel samples were prepared and preheated to 300ºC. The hardfacing process was carried out with constant parameters, i.e. current intensity, arc voltage, surfacing speed). Two protective gases were used to apply the additional material: CO2 and argon. The samples were subjected to corrosion tests in two environments (3.5% sodium chloride solution and 0.001 sulfuric acid solution). The assessment of corrosive properties was made on the basis of constant current measurements (potentiodynamic method). The influence of shielding gas on corrosion properties was demonstrated based on the tests.

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Deformation of Exposed Tool Parts for Crushing of Undesirable Advance Growth

References BREZINOVÁ, J. – DRAGANOVSKÁ, D. – GUZANOVÁ, A. – BALOG, P. – VIŇÁŠ, J. 2016. Influence of the hardfacing welds structure on their wear resistance. In Metals, vol. 6, no. 2, 36. doi:10.3390/met6020036. CHOTĚBORSKÝ, R. – HRABĚ, P. – MÜLLER, M. – SAVKOVÁ, J. – JIRKA, M. – NAVRÁTILOVÁ, M. 2009b. Effect of abrasive particle size on abrasive wear of hardfacing alloys. In Research in Agricultural Engineering, vol. 55, no. 3, pp. 101–113. CHOTĚBORSKÝ, R. – HRABĚ, P. – MŰLLER, M. – SAVKOVÁ, J. 2009a. Abrasive wear of Fe-Cr-C based welding

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Properties of Fe-Al Type Intermetallic Layers Produced by AC TIG Method

ABSTRACT

The paper presents the results of two new in-situ methods of Fe-Al intermetallic compounds layers fabrication on the steel substrates. The layers were produced by hardfacing of pure aluminum and titanium on the steel (S235JR) substrate as well as in the two-step process: the thermal spraying of pure aluminum on a steel substrate and subsequent remelting of aluminum coating with iron from the substrate using AC TIG method. As a result of the synthesis of Fe, Al and Ti components (for the hardfacing method) the new layer material based on the ordered intermetallic phases was achieved. The effects were confirmed by metallographic examinations, hardness tests and the diffraction patterns of the analyzed remelted layers. In addition, measurements of residual stresses in the layer and substrate were carried out.

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Application of Additive Manufacturing for the Repair of Forging Dies

Abstract

In this paper the investigated conditions and possibilities of repairing forging dies with high precision robotic MAG welding are presented. Different welding wire electrodes were examined and compared by their processability. Productivity, process stability, slag and fume formation were in the focus of investigation. Metallographic tests were carried out to validate the compliance of welded layers. Based on the performance of the wire electrodes, recommendations have been elaborated for the procedure specification and also for further investigation. Some robot cell layouts have been designed adapting to the special working environment and requirements of the welding procedure.

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Inspection possibilities of metallic material surface integrity by conventional ultrasonic technique

of materials, 1st ed.; CRC Press: Boca Raton, 2012. 5. Mráz, M. Nedestruktivní zkoušení trubek pomocí metody LFET, UT a ET. Koroze a ochrana materiálu 2015, 59 (3), 77-80. 6. Brezinová, J.; et al. Influence of the hardfacing welds structure on their wear resistance. Metals 2016, 6 (2), 1-12. 7. Broncek, J.; et al. Influence of mechanical anisotropy in low carbon microalloyed steel. Communications: Scientific Letters of the University of Zilina, 2015, 17 (3), 25-30. 8. Mesko, J.; et al. Microstructure

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The tribological properties of Al-brasses in various environments

-05-00633-0. 8. Bronček J., Fabian P., Radek N. Tribological Research of Properties of Heat - Treated Cast Irons with Globular Graphite, Materials Science Forum 2015, 818, 209-212. 9. Brezinová J., Draganovská D., Guzanová A., Balog P., Vňaš J. Influence of the hardfacing welds structure on their wear resistance, Metals 2016, 6 (2), 1-12.

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Wpływ Utleniania W Wysokich Temperaturach na Struktury Napawanych Warstw na Bazie Kobaltu

References D'Oliveira A. S. C. M., Paredes R. S. C., Santos R. L. C., Pulsed current plasma transferred arc hardfacing, Journal of Materials Processing Technology 171 (2006) 167-174. d'Oliveira A. S. C., Vilar R., Feder C. G., High temperature behaviour of plasma transferred arc and laser Co-based alloy coatings, Applied Surface Science 201(2002) 154-160. Jendrzejewski R., Conde A., de Damborenea J., Sliwinski G., Characterisation of the laser-clad stellite layers for protective

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Influence of Seawater Salinity on Corrosion of Hull Structural Steel

, Vol. 91, pp. 321-329, 2015. [10] Woźniak, P., Starosta, R., Corrosive properties of multi -groove pads hardfacing with the MIG method , Proceedings of 27th International Conference on Metallurgy and Materials, pp. 910-917, Brno 2018.

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Assessing the Weld Quality of Manganese Steel

References BALLA, J. 2003. Náuka o materiáloch. Nitra : SPU. 2003. ISBN 80-8069-249-1. Bernát, R. - Kro čko , V. - Drlička , R. 2009. Quality evaluation of milled hardface layers. In TechMat 2009 - Perspektivní technologie a materiály pro technické aplikace. Pardubice : Univerzita Pardubice, 2009. s. 209-214. ISBN 978-80-7395-046-0. BRZIAK, P. et al. 2003. Materiály a ich správanie sa pri zváraní. Bratislava : VUZ. 2003. ISBN 80-88734-10-X. BS 1449-1.1:1991. Steel plate, sheet and strip

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