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- Title
Experimental study on welding characteristics of CO<sub>2</sub> laser TIG hybrid welding process.
- Authors
Chen, Y. B.; Lei, Z. L.; Li, L. Q.; Wu, L.
- Abstract
The experiments of CO2 laser TIG paraxial hybrid welding with 4 mm thick AISI 321 stainless steel sheet have been performed. The arc images and welding characteristics have been investigated with different energy ratios between laser and arc. The experimental results indicate that the hybrid welding is similar to laser welding and has also two welding mechanisms: deep penetration welding and heat conduction welding. Because of the effect of keyhole induced by laser, the arc root can be stabilised and compressed, and the current density and the penetration depth are all increased significantly, which show the characteristics of deep penetration welding. However, when the current is increased to a critical value, the laser induced keyhole disappears and the arc expands obviously, which decreases the penetration depth, so that the welding mechanism has been changed from deep penetration welding to heat conduction welding. Furthermore, the effects of distance between laser beam and electrode, pulsed laser and hybrid manners on hybrid welding characteristics have also been studied.
- Subjects
INDUSTRIAL lasers; MANUFACTURING processes; SOLDER &; soldering; STEEL alloys; ALLOYS; CORROSION resistant materials; WELDING
- Publication
Science & Technology of Welding & Joining, 2006, Vol 11, Issue 4, p403
- ISSN
1362-1718
- Publication type
Article
- DOI
10.1179/174329306X129535