The Paton Welding Journal, 2013, №02



2013 №02 (08)

2013 №02 (10)

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The Paton Welding Journal, 2013, #2, 48-52 pages  

LASER WELDING OF LOW ALLOYED STEELS: INFLUENCE OF EDGE PREPARATION

M. SOKOLOV and A. SALMINEN

Lappeenranta University of Technology, Lappeenranta, Finland
 
 
Abstract
The objective of the research is to investigate an increase in efficiency of the high power laser welding process by the effect of two factors: joint edge surface roughness, and air gap between the plates. Welding of St3 low alloyed steel 20 mm thick was performed with high power fiber laser with a wavelength of 1070nm at a power of 14 kW. Optimum roughness levels and recommended air gap between the plates to ensure maximum penetration depth and highest quality of weld are presented. 26 Ref., 5 Figures
 
 
Keywords: laser welding, low alloyed steel, fiber laser, high power, absorptance, penetration depth, gap, roughness of edge surface
 
 
Received:                07.12.12
Published:               28.02.13
 
 
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