Applications of electric arc metallization method with pulsating air-spraying flow for application of coatings made from a cored wire

Authors

DOI:

https://doi.org/10.31498/2225-6733.40.2020.216166

Keywords:

arc metallization, сored wire, alloying elements, carbides, pulsation frequency, spraying flow, coating, microhardness, microstructure

Abstract

In order to reduce the oxidizing effect of the spraying flow on the liquid metal of the ends of the molten electrodes the method of periodic (pulsating) impact of the air spraying flow on the liquid metal of the electrodes has been previously proposed and developed, considering that the pause between the moments of the flow impacts allows ensuring the melting of the electrodes with a limited amount of air. The design of the device which provides pulsations of a stream with various frequency and duration is developed, data on the influence of a pulsing stream on technological characteristics of coatings, in particular, a considerable decrease in losses of alloying elements are received.As a solution to the problem of energy saving in arc metallization, the use of oxygen of the air spraying flow was considered in order to obtain wear-resistant coatings with high adhesion strength through the formation of solid oxides from non-deficient powders of metals and alloys.Due to a limited range of compositions of solid cross-section wires, it is suggested to use cored wires consisting of low-carbon shell and rod made of non-deficient, widely spread metal and ferroalloy powders, which provide high wear-resistant coatings with increased adhesion strength.Theeconomically alloyed flux-cored wire PP-MM-2 developed at the Department of Automation and Mechanization of Welding Production of the Priazovsky State Technical University was taken as the investigated one.In this paper, the influence of spraying airflow pulsation frequency in arc metallization on microstructure and micro hardness value of coatings obtained by using powder wires is considered

Author Biographies

V. О. Royanov, State Higher Education Institution "Priazovskyi state technical university", Mariupol

Доктор технічних наук, професор

I. V. Zakharova, State Higher Education Institution "Priazovskyi state technical university", Mariupol

Кандидат технічних наук, доцент

References

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How to Cite

Royanov V. О., & Zakharova, I. V. (2020). Applications of electric arc metallization method with pulsating air-spraying flow for application of coatings made from a cored wire. Reporter of the Priazovskyi State Technical University. Section: Technical Sciences, (40), 44–50. https://doi.org/10.31498/2225-6733.40.2020.216166

Issue

No. 40 (2020): Reporter of the Priazovskyi State Technical University. Section: Technical sciences

Section

132 Materials Science

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