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

W. Guo, Q. Liu, J.A. Francis, D. Crowther, A. Thompson, Z. Liu, L. Li

C I R P Annals. 2015;64(1):197-200.

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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.

Keyword(s)

Laser Welding High strength steel

Bibliographic metadata

Type of resource:
Content type:
Publication status:
Published
Publication type:
Publication form:
Collaborator(s):
Published date:
Language:
eng
Journal title:
Alternative journal title:
C I R P Annals. Manufacturing Technology
ISSN:
Publisher:
Volume:
64
Issue:
1
Start page:
197
End page:
200
Total:
3
Pagination:
197-200
Digital Object Identifier:
10.1016/j.cirp.2015.04.070
Funding awarded externally:
Attached files embargo period:
Immediate release
Attached files release date:
14th December, 2015
Access state:
Active

Institutional metadata

University researcher(s):

Record metadata

Manchester eScholar ID:
uk-ac-man-scw:287697
Created by:
Li, Lin
Created:
14th December, 2015, 15:28:14
Last modified by:
Li, Lin
Last modified:
14th December, 2015, 15:28:14

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