Application of Impulsive Electromagnetic Affects for Crystallization Process of Joints for Spot Welding

Роман Миколайович Рижов, Павло Юрійович Сидоренко, Степан Олександрович Нестуля, Володимир Віталійович Кочубей

Abstract


Results of external influenced impulsive electromagnetic affect research to crystallization joint process with construct and stainless steel, and dissimilar material joints for spot welding are researched. Changes in different weld spot structures are shown. The samples obtained using design mode of spot welding with the impulsive electromagnetic affects, were compared and an increasing in the dispersity structure by twice times was indentified, but the dendrite width was decreased. Impulsive electromagnetic affect influence on weld line length is studied. This is one of the factors to increase welding joint strength for spot welding. The efficiency of the use of electromagnetic affect for different steel types of welding and dissimilar joints are estimated. More symmetric weld spot form in welding joints of dissimilar materials with the impulsive electromagnetic affects are observed. The symmetry of form compounds indicates an intensification of the hydrodynamic movement of the melt. The result is an averaging of thermal properties.

Keywords


Spot welding; Pulsed electromagnetic affect; Crystallization; Strength of welded joints

References


V.H. López-Cortéz and F.A. Reyes-Valdés, “Understanding Resistance Spot Welding of Advanced High-Strength Steels”, Welding J., vol. 78, pp. 36–40, 2008.

A. Aravinthan and C. Nachimani, “Analysis of Spot Weld Growth on Mild and Stainless Steel”, Ibid, vol. 90, pp. 143s–147s, 2011.

Y.B. Li et al., “Magnetically Assisted Resistance Spot Welding of Dual-Phase Steel”, Ibid, vol. 92, pp. 124s–132s, 2013.

Попов В.А. Влияние магнитного поля на формирование соединения при контактной точечной сварке // Сварочное производство. – 1992. – № 10. – С. 28–29.

Рижов Р.М., Кочубей В.В, Сидоренко П.Ю. Визначення механічних властивостей зварних з’єднань, виконаних точковим контактним зварюванням із застосуванням зовнішніх електромагнітних дій // Наукові вісті НТУУ “КПІ”. – 2014. – № 1. – С. 58–63.


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DOI: http://dx.doi.org/10.20535/1810-0546.2014.2.52174

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