Experimental results of laser welding of zinc coated steel sheets with a new method

2003 ◽  
Author(s):  
M. M. S. Gualini ◽  
F. Grassi
Keyword(s):  
Laser Welding ◽  
Experimental Results ◽  
New Method ◽  
Coated Steel ◽  
Steel Sheets ◽  
Zinc Coated Steel

CO2 laser welding of zinc-coated steel sheets

1998 ◽  
Vol 12 (4) ◽  
pp. 606-614 ◽  
Author(s):  
Jae-Do Kim ◽  
H Na ◽  
Chan-Cheol Park
Keyword(s):  
Laser Welding ◽  
Co2 Laser ◽  
Coated Steel ◽  
Steel Sheets ◽  
Zinc Coated Steel

scholarly journals Disk Laser Welding of Car Body Zinc Coated Steel Sheets / Spawanie Laserem Dyskowym Blach Ze Stali Karoseryjnej Ocynkowanej

2015 ◽  
Vol 60 (4) ◽  
pp. 2913-2922 ◽  
Author(s):  
A. Lisiecki ◽  
R. Burdzik ◽  
G. Siwiec ◽  
Ł. Konieczny ◽  
J. Warczek ◽  
...  
Keyword(s):  
Laser Welding ◽  
Mechanical Performance ◽  
Galvanized Steel ◽  
Coated Steel ◽  
Butt Joints ◽  
Beam Spot ◽  
Disk Laser ◽  
Car Body ◽  
Steel Sheets ◽  
Zinc Coated Steel

Autogenous laser welding of 0.8 mm thick butt joints of car body electro-galvanized steel sheet DC04 was investigated. The Yb:YAG disk laser TruDisk 3302 with the beam spot diameter of 200 μm was used. The effect of laser welding parameters and technological conditions on weld shape, penetration depth, process stability, microstructure and mechanical performance was determined. It was found that the laser beam spot focused on the top surface of a butt joint tends to pass through the gap, especially in the low range of heat input and high welding speed. All test welds were welded at a keyhole mode, and the weld metal was free of porosity. Thus, the keyhole laser welding of zinc coated steel sheets in butt configuration provides excellent conditions to escape for zinc vapours, with no risk of porosity. Microstructure, microhardness and mechanical performance of the butt joints depend on laser welding conditions thus cooling rate and cooling times. The shortest cooling time t8/5 was calculated for 0.29 s.

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