Next Article in Journal
Experimental and Numerical Analysis of Gas/Powder Flow for Different LMD Nozzles
Previous Article in Journal
Theoretical Model of Residual Stress and Warpage for Wire and Arc Additive Manufacturing Stiffened Panels
Previous Article in Special Issue
Laser Welding of ASTM A553-1 (9% Nickel Steel) (PART I: Penetration Shape by Bead on Plate)
Open AccessArticle

Effects of Arc Length Adjustment on Weld Bead Formation and Droplet Transfer in Pulsed GMAW Based on Datum Current Time

1
College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
2
Kunshan Huaheng Welding Co., Ltd., Kunshan 215347, China
*
Author to whom correspondence should be addressed.
Metals 2020, 10(5), 665; https://doi.org/10.3390/met10050665
Received: 25 April 2020 / Revised: 17 May 2020 / Accepted: 18 May 2020 / Published: 20 May 2020
(This article belongs to the Special Issue Advanced Welding Technology in Metals)
The characteristics of weld bead formation and droplet transfer in pulsed gas metal arc weld (GMAW) with different arc lengths were studied by changing the base current time in this work. The results showed that it was easier to cause short circuits and spatters with a short arc. However, the deviation between the deepest point of penetration and the center of bead will be aggravated with the increase of arc length. In addition, more than 90% “one drop per pulse” (ODPP) transfer mode can be obtained when the pulse parameters were selected properly. However, the short arc trended to rise the proportion of “multiple drops per pulse” (MDPP), and the long arc trended towards increasing the proportion of “one drop per multiple pulses” (ODMP). Additionally, with the growth of the arc in the projected transfer zone, the penetration tended to become shallower because of the increase of arc heat dissipation, the fall of arc energy density, and droplet impact force. Overall, the strategy of choosing suitable arc length of pulsed GMAW was summarized: in order to obtain high-quality bead formation and weld joints, a shorter arc in the projected transfer zone was recommended. View Full-Text
Keywords: pulsed GMAW; droplet transfer; weld bead formation; droplet impact force pulsed GMAW; droplet transfer; weld bead formation; droplet impact force
Show Figures

Figure 1

MDPI and ACS Style

Zhai, P.; Xue, S.; Wang, J.; Chen, W.; Chen, T.; Ji, S. Effects of Arc Length Adjustment on Weld Bead Formation and Droplet Transfer in Pulsed GMAW Based on Datum Current Time. Metals 2020, 10, 665.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop