Vol.21, No.3, 2021, pp. 239–243
UDC:

DEVELOPMENT OF A NON-STATIONARY MATHEMATICAL MODEL OF PENETRATION ZONE FORMATION DURING ELECTRIC ARC SURFACING

Elena Lavrova1, Vitaliy Ivanov1, Dmitry Il'yashchenko2,3*, Elena Verkhoturova4

1) Pryazovskyi State Technical University, Mariupol, UKRAINE

2) Yurga Institute of Technology, TPU, Yurga, RUSSIAN FEDERATION

3) Institute of Strength Physics and Materials Science, Siberian Branch, Russian Academy of Sciences, Tomsk, RUSSIAN FEDERATION

email: mita8@tpu.ru

4) Irkutsk National Research Tech. University, Irkutsk, RUSSIAN FEDERATION

 

Abstract

The article presents the development of a non-stationary mathematical model of penetration zone formation during electric arc surfacing. Simulation of the evolution of the penetration zone in time with a stationary heat source is carried out. The possibility of using penetration depth data obtained on a model of a fixed arc in the range of surfacing speeds is substantiated. In order to analyse the pressure balance in the case of a stationary heating source, a design scheme of the pressure balance in the weld pool is constructed.

It has been calculated and experimentally established that the increase in penetration depth occurs until the moment at which the arc pressure is balanced by the metal-static pressure of the molten metal in the weld pool. Based on this condition, a model of the weld pool formation in an unsteady mode is created.  

Keywords: electric arc surfacing, penetration zone, pressure balance, mathematical model, weld pool formation, heat source

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