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7405 |
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Comparative analysis of laser, arc and hybrid cladding of Fe-Cr-C-Ti-Al coatings from cored wires |
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NIKOLAY Gokhfeld / Ural Branch of the Russian Academy, Russian Federation Roman Lanev / IRS LaserTech, Russia Michael Filippov/ Department of Welding Production Technologies, Ural Federal University, Russia Yuri Korobov/ Institute of Metal Physics of the Ural Branch of the Russian Academy of Sciences, Russia Svetlana Estemirova/ Institute of Metallurgy, Ural Branch of the Russian Academy, Russia |
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Layers from Fe-Cr-C-T-Al cored wires were performed by laser, arc and hybrid laser-arc deposition. The laboratory tests showed that the layers differ greatly in wear resistance. Studies by metallographic, X-ray diffraction, durometric, EBSD methods were conducted to identify the causes. The analysis of the study’s results showed that the reason is the difference in the structure due to changes in the cooling rates of the deposited metal. This difference leads to the possibility of the formation of a structure of metastable austenite, which, in turn, transformation to deformation martensite (alpha’) under load. This leads to rise of wear resistance due to synergetic effect of (gamma to alpha’) transformation. |