Properties of the welded joints of manganese steel made by low-frequency pulsed arc welding |
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| Authors: | Yu N Saraev V P Bezborodov S V Gladovskii N I Golikov |
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| Affiliation: | 1.Institute of Strength Physics and Materials Science, Siberian Branch,Russian Academy of Sciences,Tomsk,Russia;2.National Research Tomsk Polytechnic University,Tomsk,Russia;3.Institute of Mechanical Engineering, Ural Branch,Russian Academy of Sciences,Yekaterinburg,Russia;4.Institute of Physicotechnical Problems of the North, Siberian Branch,Russian Academy of Sciences,Yakutsk,Russia |
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| Abstract: | The structure, the mechanical properties, the impact toughness, and the fracture mechanisms of the welded joints made of steel 09G2S plates by direct current welding and pulsed arc welding with a modulated arc current in the frequency range 0.25–5.0 Hz are studied. The application of low-frequency pulsed arc welding allowed us to form welded joints with a fine-grained structure in the weld metal and the heat-affected zone and to achieve a higher impact toughness and a longer cyclic fatigue life as compared to the welded joints fabricated by direct current welding. The achieved effect manifests itself over the entire testing range from 20 to–60°C. |
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