DOI: 10.18503/1995-2732-2021-19-1-42-47
Abstract
Abstract. Problem Statement (Relevance): The paper is devoted to the problems of forming the structures of deposited metal of low-carbon steels. Improving the performance of welded joints contributes to the use of technological solutions and techniques that improve the structure of deposited metal and provide a high level of mechanical properties. The paper presents a comparative analysis of stationary and pulse modes of mechanized arc welding and nano- and ultra-dispersed inoculators of tungsten monocarbide WC to control the structure formation of deposited weld metal. Methods Applied: The samples under study were manufactured by arc welding methods followed by the production of metallographic samples for microanalysis. Light metallography and Vickers hardness measurement were used to study the structure of the deposited samples. The microstructure was analyzed using Meiji Techno and Micromed-Met light microscopes using the Thixomet Pro computer image analysis system. Hardness of the deposited metal was measured using the Vickers method on an HV-1000 hardness tester. Originality: New data were obtained to compare efficiency of stationary and pulse modes of mechanized arc welding and nano- and ultra-dispersed inoculators of tungsten monocarbide WC for controlling the structure formation of deposited weld metal. Findings: The authors got options of the metal structures under various types of treatment of the molten bath. Having analyzed metallographic studies, we may conclude that the best option of forming the structure of deposited metal is achieved by adding to the molten bath inoculating nano- and ultra-dispersed particles of tungsten monocarbide. Practical Relevance: The data obtained as a result of the research may be applied in the design of technological processes of welding and surfacing of low-carbon, low-alloy steels, as well as in the development of new functional welding materials.
Keywords
Welding, surfacing, coated electrode, welding wire, metal structure, hardness, nanopowder, inoculation, modification.
For citation
Sheksheev M.A., Shiryaeva E.N. Forming the Structure of Deposited Metal of Low-Carbon Steel Under Various Types of Treatment. Vestnik Magnitogorskogo Gosudarstvennogo Tekhnicheskogo Universiteta im. G.I. Nosova [Vestnik of Nosov Magnitogorsk State Technical University]. 2021, vol. 19, no. 1, pp. 42–47. https://doi.org/10.18503/1995-2732-2021-19-1-42-47
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