TY - JOUR
T1 - High speed X-ray observation of digital controlled submerged arc welding phenomena
AU - Abe, Yohei
AU - Fujimoto, Takahiro
AU - Nakatani, Mitsuyoshi
AU - Komen, Hisaya
AU - Shigeta, Masaya
AU - Tanaka, Manabu
N1 - Publisher Copyright:
© 2021 Institute of Materials, Minerals and Mining. Published by Taylor & Francis on behalf of the Institute.
PY - 2021
Y1 - 2021
N2 - In this study, welding phenomena during submerged arc welding (SAW) were revealed with X-ray observation. In the experiment, the test coupon was placed between the X-ray source and high-speed camera. The area surrounding the arc was observed from an angle perpendicular to the welding direction vnat a frame rate is 3000 f s–1. From the observation results, the droplet transfer, weld pool and molten flux (slag), which were previously unknown, were investigated. The droplet transfer mode is the spray transfer. With a high polarity ratio comparable to electrode negative (EN ratio), the transfer frequency decreases, but the droplet diameter increases, then changes to the globular transfer. The slag solidifies covering surface of the weld pool.
AB - In this study, welding phenomena during submerged arc welding (SAW) were revealed with X-ray observation. In the experiment, the test coupon was placed between the X-ray source and high-speed camera. The area surrounding the arc was observed from an angle perpendicular to the welding direction vnat a frame rate is 3000 f s–1. From the observation results, the droplet transfer, weld pool and molten flux (slag), which were previously unknown, were investigated. The droplet transfer mode is the spray transfer. With a high polarity ratio comparable to electrode negative (EN ratio), the transfer frequency decreases, but the droplet diameter increases, then changes to the globular transfer. The slag solidifies covering surface of the weld pool.
KW - EN ratio
KW - Submerged arc welding
KW - X-ray observation
KW - heat resisting steels
KW - welding phenomena
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U2 - 10.1080/13621718.2021.1908746
DO - 10.1080/13621718.2021.1908746
M3 - Article
AN - SCOPUS:85103553748
SN - 1362-1718
VL - 26
SP - 332
EP - 340
JO - Science and Technology of Welding and Joining
JF - Science and Technology of Welding and Joining
IS - 4
ER -