Study on the hybrid laser-arc welding of 3 mm thick high-strength steel with high speed

Abstract Hybrid Laser-Arc Welding (HLAW) technique is an enabler for the next generation high efficiency we lding, bu t in dustrial ad option ha s be en li mited du e to pr ocess complexity. Previously documented challenges with root cracks posed by incomplete penetration were significant; h owever, t his w ork p resents s uccessful w eld s amples p repared f rom S 690QL steel welded from two sides with a 16 kW disc laser. Weld travel speeds below 500 mm/min and weld line energies between 1.7 and 1.9 kJ/mm gave sound weld samples, evaluated for yield strength, elongation, hardness and Charpy-V toughness according to DS/EN ISO 10025-6:2004+A1. The results shown here indicate a significant i ncrease i n t he overall e fficiency of but t wel ds in high strength steels and further cement the HLAW process for high strength steels. It is shown that the consecutive nature of the weld procedure led to non-negligible interpass temperatures for the second weld.

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Pore formation and its mitigation during hybrid laser/arc welding of advanced high strength steel

Materials & Design (1980-2015) ◽

10.1016/j.matdes.2014.10.072 ◽

2015 ◽

Vol 67 ◽

pp. 509-521 ◽

Cited By ~ 45

Author(s):

M. Mazar Atabaki ◽

J. Ma ◽

W. Liu ◽

R. Kovacevic

Keyword(s):

High Strength Steel ◽

Arc Welding ◽

Pore Formation ◽

High Strength ◽

Advanced High Strength Steel ◽

Hybrid Laser Arc Welding

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Hybrid laser-arc welding of advanced high-strength steel

Journal of Materials Processing Technology ◽

10.1016/j.jmatprotec.2014.06.018 ◽

2014 ◽

Vol 214 (12) ◽

pp. 2823-2833 ◽

Cited By ~ 20

Author(s):

Wei Liu ◽

Junjie Ma ◽

Guang Yang ◽

Radovan Kovacevic

Keyword(s):

High Strength Steel ◽

Arc Welding ◽

High Strength ◽

Advanced High Strength Steel ◽

Hybrid Laser Arc Welding

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Advanced high-strength AA5083 welds by high-speed hybrid laser-arc welding

Materials Letters ◽

10.1016/j.matlet.2021.129594 ◽

2021 ◽

pp. 129594

Author(s):

A. Vorontsov ◽

A. Zykova ◽

A. Chumaevskii ◽

K. Osipovich ◽

V. Rubtsov ◽

...

Keyword(s):

Arc Welding ◽

High Speed ◽

High Strength ◽

Hybrid Laser Arc Welding

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Laser and Hybrid Laser-Arc Welding of High Strength Steel N-A-XTRA-70

Materials Science Forum ◽

10.4028/www.scientific.net/msf.870.630 ◽

2016 ◽

Vol 870 ◽

pp. 630-635 ◽

Cited By ~ 9

Author(s):

O. Berdnikova ◽

V. Pozniakov ◽

O. Bushma

Keyword(s):

Mechanical Properties ◽

Welded Joints ◽

High Strength Steel ◽

Arc Welding ◽

High Strength Steels ◽

High Strength ◽

Point Of View ◽

Flow Sheet ◽

Hybrid Laser Arc Welding ◽

Fine Grain

The advantages of laser and hybrid laser-arc welding in production of welded structures from high strength steels are increase of efficiency due to rise of the welding rate by order; significant (3 – 5 times) decrease of heat input; reduction of weld size; receiving of fine grain structures in the welds and the heat affected zone increasing strength of the joint and reducing susceptibility to crack formation. Research of the peculiarities of laser and hybrid processes, their effect on weld formation, revealing the advantages and eliminating the disadvantages of laser and arc constituents of the heat sources are currently the main problems for the production engineers and researchers. Therefore, the aim of the investigation lies in determination of the effect of process mode parameters of the hybrid laser-arc and laser welding in high-strength steel welding on formation of the structure of the welded joint metal as well as the analysis of effect of this structure on their mechanical properties. The investigation was focused on the high-strength steel N-A-XTRA-70 which is widely used in European Union countries for manufacture of critical structures of different designations. A laboratory bench was developed for experiments. It was used for carrying out investigation on the process flow sheet which provided location of a consumable electrode arc at some distance ahead of a laser beam during welding proceeding. The laser irradiation source was Nd:YAG-laser DY 044 of ROFIN company (Germany). For the first time the results of carried investigations allowed determining the process modes of laser and hybrid laser-arc welding for producing quality and sound welded joints of the high-strength steel from the point of view of the structure formation and metal phase composition providing high indices of mechanical properties and crack resistance of the welded joints.

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