Comparison of laser welds in thick section S700 high-strength steel manufactured in flat (1G) and horizontal (2G) positions

Wei Guo; Qiang Liu; John Anthony Francis; Dave Crowther; Alan Thompson; Zhu Liu; Lin Li

doi:10.1016/j.cirp.2015.04.070

Comparison of laser welds in thick section S700 high-strength steel manufactured in flat (1G) and horizontal (2G) positions

Wei Guo, Qiang Liu, John Anthony Francis, Dave Crowther, Alan Thompson, Zhu Liu, Lin Li

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Abstract

Lack of penetration, undercut and melt sagging are common welding defects for single-pass laser welds in thick plates, particularly when using a traditional 1G welding position (laser directed towards ground). This investigation shows, for the first time, that welding 13 mm thick high-strength S700 steel plates in the 2G position (laser beam perpendicular to the direction of gravity) can mitigate some of the common welding defects including undercut and sagging. A computational fluid dynamic analysis indicates that the 2G welding position can assist in achieving an appropriate balance between surface tension, hydrostatic pressure (gravity) and recoil-pressure from the metal vapour. (C) 2015 CIRP.

Original language	English
Pages (from-to)	197-200
Number of pages	3
Journal	C I R P Annals
Volume	64
Issue number	1
DOIs	https://doi.org/10.1016/j.cirp.2015.04.070
Publication status	Published - Aug 2015

Keywords

Laser, welding, high strength steel

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10.1016/j.cirp.2015.04.070

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LPRC: Laser Processing Research Centre Impact
Allegre, O. (PI), Crosby, D. (PI), Domingos, M. (PI), Francis, J. (PI), Gillen, D. (PI), Guo, W. (PI), Li, L. (PI), Mativenga, P. (PI), Rogers, B. D. (PI), Whitehead, D. (PI), Wilson, D. (PI), Zhong, S. (PI), Mirhosseini, N. (Researcher), Ouyang, J. (Researcher), Huang, Y. (Researcher), Wei, C. (Researcher), Cheng, D. (PGR student), Suryo Pratomo, E. (PGR student), Zhang, Z. (PGR student), Li, Z. (PGR student), Mo, H. (PGR student), Zhu, M. (PGR student), Li, Q. (PGR student), Liu, W. (PGR student), Wang, L. (PGR student), Guo, H. (PGR student), Heinemann, R. (PI) & Liu, Z. (PI)
1/04/00 → …
Project: Research

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title = "Comparison of laser welds in thick section S700 high-strength steel manufactured in flat (1G) and horizontal (2G) positions",

abstract = "Lack of penetration, undercut and melt sagging are common welding defects for single-pass laser welds in thick plates, particularly when using a traditional 1G welding position (laser directed towards ground). This investigation shows, for the first time, that welding 13 mm thick high-strength S700 steel plates in the 2G position (laser beam perpendicular to the direction of gravity) can mitigate some of the common welding defects including undercut and sagging. A computational fluid dynamic analysis indicates that the 2G welding position can assist in achieving an appropriate balance between surface tension, hydrostatic pressure (gravity) and recoil-pressure from the metal vapour. (C) 2015 CIRP.",

keywords = "Laser, welding, high strength steel",

author = "Wei Guo and Qiang Liu and Francis, {John Anthony} and Dave Crowther and Alan Thompson and Zhu Liu and Lin Li",

year = "2015",

month = aug,

doi = "10.1016/j.cirp.2015.04.070",

language = "English",

volume = "64",

pages = "197--200",

journal = "C I R P Annals",

issn = "0007-8506",

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T1 - Comparison of laser welds in thick section S700 high-strength steel manufactured in flat (1G) and horizontal (2G) positions

AU - Guo, Wei

AU - Liu, Qiang

AU - Francis, John Anthony

AU - Crowther, Dave

AU - Thompson, Alan

AU - Liu, Zhu

AU - Li, Lin

PY - 2015/8

Y1 - 2015/8

N2 - Lack of penetration, undercut and melt sagging are common welding defects for single-pass laser welds in thick plates, particularly when using a traditional 1G welding position (laser directed towards ground). This investigation shows, for the first time, that welding 13 mm thick high-strength S700 steel plates in the 2G position (laser beam perpendicular to the direction of gravity) can mitigate some of the common welding defects including undercut and sagging. A computational fluid dynamic analysis indicates that the 2G welding position can assist in achieving an appropriate balance between surface tension, hydrostatic pressure (gravity) and recoil-pressure from the metal vapour. (C) 2015 CIRP.

AB - Lack of penetration, undercut and melt sagging are common welding defects for single-pass laser welds in thick plates, particularly when using a traditional 1G welding position (laser directed towards ground). This investigation shows, for the first time, that welding 13 mm thick high-strength S700 steel plates in the 2G position (laser beam perpendicular to the direction of gravity) can mitigate some of the common welding defects including undercut and sagging. A computational fluid dynamic analysis indicates that the 2G welding position can assist in achieving an appropriate balance between surface tension, hydrostatic pressure (gravity) and recoil-pressure from the metal vapour. (C) 2015 CIRP.

KW - Laser, welding, high strength steel

U2 - 10.1016/j.cirp.2015.04.070

DO - 10.1016/j.cirp.2015.04.070

M3 - Article

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VL - 64

SP - 197

EP - 200

JO - C I R P Annals

JF - C I R P Annals

IS - 1

ER -

Comparison of laser welds in thick section S700 high-strength steel manufactured in flat (1G) and horizontal (2G) positions

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Keywords

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LPRC: Laser Processing Research Centre Impact

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