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Influence of Current Modulation on Melting Behavior during Wire Arc Spraying

  • The atomizing gas dynamics and the applied process energy have a significant influence on the produced particles. The melting process of the two wires can be influenced by current modulation. As for arc welding processes, more and more electronic and software-controlled machines are being used for arc spraying and will have replaced conventional power sources in the future. Due to the highly dynamic, fast regulating computing technology in the latest energy source, technology arcs can be operated with different current forms and types. The modern machines allow process-stable, reproducible variation of the particles and heat input into the substrate. Constant and pulsed current can be used as current forms. Usable current types are direct current (DC) and alternating current (AC). The electrical parameters must be analyzed to evaluate the process behavior. The consumable used is a wire-shaped iron-based alloy with a diameter of 1.6 mm. Relevant process parameters such as basic current Iground, pulse current Ipulse, pulse duration tpulse, impulse frequency fpulse, and alternating current frequency, fAC, are varied and recorded using appropriate measurement technology. The aim is to change the process performance and thereby the particle formation in a broad band. High-speed images are used to observe the arc and the deposition process. In addition, particle sizes are determined.

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Author:Sebastian WeisGND, Stefan Brumm, Robin Grunert, Jan Morgenschweis, Jürgen Bosler, Thomas Grund
DOI:https://doi.org/10.3390/met12081347
ISSN:2075-4701 Available in library?
Parent Title (English):Metals
Publisher:MDPI AG
Document Type:Article
Language:English
Year of first Publication:2022
Tag:General Materials Science; Metals and Alloys
Volume:12
Issue:8
Article Number:1347
Page Number:13
Faculty:Westsächsische Hochschule Zwickau / Automobil- und Maschinenbau
open_access (DINI-Set):open_access
Release Date:2024/03/01