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Vol.20, No.1, 2020, pp. 33–36 |
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STABILITY OF MMA WELDING WITH PROTECTIVE COATINGS D.P. Ilyashchenko1, D.A. Chinakhov2, E.V. Verkhoturova3, E.V. Lavrova4 1) Industrial Technology Department, Yurga Institute of Technology National Research Tomsk Polytechnic University, Yurga, RUSSIA, email: mita8@rambler.ru 2) Institute of Strength Physics and Materials Science, Siberian Branch, Russian Academy of Sciences, Tomsk, RUSSIA 3) Irkutsk National Research Tech. University, Irkutsk, RUSSIA 4) Priazovskiy State Technical University, Mariupol, UKRAINE |
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Abstract The paper presents outcomes of comprehensive research that examines the relevance of protective surface coatings on a product to be welded for such parameters as MMA welding stability, width of temperature fields on the surface of a welded structure, as well as structure and phase composition of the deposited metal. The experimental study has associated the use of a protective coating in MMA with an increase in certain characteristics - shortcut period of arc gap (5-11 %); bridging time (10-12 %); mass of transferred electrode metal droplets (up to 50 %); amplitude value of the welding current (25 %); size of a deposited metal grain; and a heat affected zone (15-25%). Keywords: manual arc welding, protective coating, arc stability welding, heat content, weld pool, microstructure |
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full article (790 kB)
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