Abstract
Structure formation has been investigated in the surface layer of steel 20 after overlaying laser welding of H13 grade steel (analog of 4Х5МФ1С) in LENS 850-R plant with 1kW laser according to several typical schematics. The effect of overlaying process on the formation of heterogeneous structure and hardness across the layers of laser welding has been investigated. Metallographic, spectral and X -ray crystallography were applied. X -ray diffraction analysis showed considerable changes of the chemical composition of the layers is shown in comparison with the chemical com- position of initial H13 steel. Heat treatment of the overlaying metal at 650 °C and 750 °C leads to structure leveling and reduction of hardness. The factors affecting the formation of complex structures and changes in hardness for all types of overlaying metal are found.
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Schedule a callMore From: Izvestiya Vuzov. Poroshkovaya Metallurgiya i Funktsional’nye Pokrytiya (Proceedings of Higher Schools. Powder Metallurgy аnd Functional Coatings)
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