Analysis of metal transfer and weld geometry in hot-wire GTAW with indirect resistive heating

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Abstract

In this publication, the different metal transfer modes of a hot-wire GTAW process with indirect resistive preheating of the wire are presented. The hot-wire GTAW process is characterized by an additional preheating unit that is used to heat the wire before it reaches the melt pool. Thus, to preheat the wire, the contact between the melt pool and the wire is not necessary. In order to examine the metal transfer of the wire, deposition welds are analysed using a high-speed camera with a laser light source as well as a data acquisition unit. The presented results comprise the impact analysis of the GTAW current, the hot-wire current, the wire feeding rate, the wire feeding angle as well as the wire feeding direction. The observed metal transfer modes can be characterized as either a constant melting bridge (cmb) between the wire and the melt pool or a recurring melting bridge (rmb). The analysis also reveals that the influence of the process parameters and thus the metal transfer mode on the bead properties is only marginal.

Details

OriginalspracheEnglisch
Seiten (von - bis)2109-2117
Seitenumfang9
FachzeitschriftWelding in the world
Jahrgang64
Ausgabenummer12
Frühes Online-DatumSept. 2020
PublikationsstatusVeröffentlicht - Dez. 2020
Peer-Review-StatusJa

Externe IDs

Scopus 85090185014
ORCID /0000-0003-2458-0495/work/142239327

Schlagworte

Schlagwörter

  • Gtaw, Hot-wire, Metal transfer, Tig, Waam