The Paton Welding Journal, 2013, №03



2013 №03 (08)

2013 №03 (10)

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The Paton Welding Journal, 2013, #3, 46-50 pages  

HYBRID LASER-PLASMA WELDING OF STAINLESS STEELS

I.V. KRIVTSUN, A.I. BUSHMA and V.Yu. KHASKIN

E.O. Paton Electric Welding Institute, NASU, Kiev, Ukraine
 
 
Abstract
Welding of thin-sheet stainless steel joints receives acceptance in many industries. As a rule, argon-arc, resistance or plasma welding processes are used for these purposes. Investigation of the advanced world experience in application of welding processes shows that the intensive research is underway now on hybrid laser-plasma welding used to address the above problems. This study is dedicated to investigation of technological capabilities of this welding process. Technological investigations of hybrid laser-plasma welding of stainless steels of the austenitic and ferritic grades were carried out, and its comparison with the plasma and laser welding processes was performed. Mechanical properties of the hybrid welded joints were evaluated, and their structure was examined. Prospects of practical application of laser-plasma welding of thin-sheet stainless steel joints were shown. The ranges of parameters of hybrid welding of stainless steels, where there is no need to use filler materials, were found. It was established that the joints produced by this method are not inferior in their mechanical properties and quality of the weld formation to the laser welded ones, but in a number of cases are superior to them, and are much superior in quality of the weld formation to the plasma welded joints. Productivity of hybrid welding is 2-3 times higher than that of laser welding, and up to 4 times higher than that of plasma welding. 9 Ref., 2 Tables, 6 Figures.
 
 
Keywords: stainless steels, hybrid laser-plasma welding, laser radiation, diode laser, hybrid effect, structures, microhardness, mechanical properties, prospects of application
 
 
Received:                04.09.12
Published:               28.03.13
 
 
References
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