Effect of electric arc on laser keyhole behavior based on direct observation during low power pulsed laser–arc hybrid welding process

2013 ◽  
Vol 51 (10) ◽  
pp. 1153-1160 ◽  
Author(s):  
Liming Liu ◽  
Minghua Chen ◽  
Chenbin Li
Keyword(s):  
Low Power ◽  
Direct Observation ◽  
Pulsed Laser ◽  
Welding Process ◽  
Electric Arc ◽  
Hybrid Welding ◽  
Behavior Based ◽  
Keyhole Behavior

Pulsed LASER-(Micro)TIG Welding of Automotive Dissimilar Zn-Coated Advanced High Strength Steels Thin Sheets in Overlap Configuration

2016 ◽  
Vol 1138 ◽  
pp. 147-152
Author(s):  
Aurel Valentin Bîrdeanu
Keyword(s):  
High Performance ◽  
Pulsed Laser ◽  
Welding Process ◽  
High Strength Steels ◽  
High Strength ◽  
Industrial Applications ◽  
Cost Ratio ◽  
Hybrid Welding ◽  
Thin Sheets ◽  
Advanced High Strength Steels

The development and implementation into a high number of industrial applications of materials categorized as (Advanced) High Strength Steels (AHSS) due to their high performance per cost ratio is more and more present and this trend is also combined with the development and implementation of new joining technologies and processes, including laser-arc hybrid processes.The paper presents the results of applying Pulsed LASER-(micro)TIG hybrid welding process, for realizing overlap joints for Zn-coated (A)HSS materials in dissimilar configurations, joints that were presented as designed based on UltraLight Steel Auto Body (ULSAB) principles.The influence of main hybrid welding process parameters was investigated in order to establish if one can obtain joints with high values for the shear strength resistance for some of the actually used dissimilar steel combinations based on designs applied throughout ULSAB project and the autos built following these principles.

Behavior and Spectrum Analysis of Welding Arc in Low-Power YAG-Laser–MAG Hybrid-Welding Process

2008 ◽  
Vol 36 (4) ◽  
pp. 1937-1943 ◽  
Author(s):  
Liming Liu ◽  
Ruisheng Huang ◽  
Gang Song ◽  
Xinfeng Hao
Keyword(s):  
Low Power ◽  
Spectrum Analysis ◽  
Welding Process ◽  
Hybrid Welding ◽  
Yag Laser ◽  
Welding Arc

Pulsed LASER-(micro)TIG hybrid welding: Process characteristics

2012 ◽  
Vol 212 (4) ◽  
pp. 890-902 ◽  
Author(s):  
Aurel-Valentin Bîrdeanu ◽  
Cristian Ciucă ◽  
Alexandru Puicea
Keyword(s):  
Pulsed Laser ◽  
Welding Process ◽  
Hybrid Welding ◽  
Process Characteristics

Induction Assisted Hybrid-Welding Processes to Join Heavy-Walled Steel Components

2014 ◽  
Vol 698 ◽  
pp. 231-236
Author(s):  
Jörg Neumeyer ◽  
Bernard Nacke
Keyword(s):  
Thermal Conductivity ◽  
Numerical Simulation ◽  
Temperature Drop ◽  
Welding Process ◽  
Electric Arc ◽  
Heating Process ◽  
Hybrid Welding ◽  
Metal Sheets ◽  
Short Time ◽  
Welding Processes

In order to weld heavy-walled metal sheets (16mm and more) a hybrid process, that includes an electric arc and the laser beam, is frequently applied at present. Due to the high thermal conductivity of metals and the enormous temperature gradient between the laser-welded area and the not welded region around the bond, there is a great heat flow and the welded material is cooled down in very short time. This high decrease of temperature leads to decayed metallurgical qualities. In order to slow down the temperature drop, an inductive process is applied to the hybrid welding device. Because of the high thickness of the metal sheets both an inductive preheating and an inductive post-heating process are added. To configure an optimal design for the inductors the numerical simulation is used and especially the heat generation of the welding process has to be included in a physical realistic way.

Influences of laser in low power YAG laser-MAG hybrid welding process

2008 ◽  
Vol 6 (1) ◽  
pp. 47-50 ◽  
Author(s):  
黄瑞生 Ruisheng Huang ◽  
刘黎明 Liming Liu ◽  
张帆 Fan Zhang
Keyword(s):  
Low Power ◽  
Welding Process ◽  
Hybrid Welding ◽  
Yag Laser

scholarly journals Hybrid Welding (Laser–Electric Arc MAG) of High Yield Point Steel S960QL

Materials ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5447
Author(s):  
Michał Urbańczyk ◽  
Janusz Adamiec
Keyword(s):  
Welded Joints ◽  
Base Material ◽  
Welding Process ◽  
Electric Arc ◽  
Coarse Grained ◽  
High Yield ◽  
Quality Level ◽  
Hybrid Welding ◽  
Plastic Properties ◽  
Welding Thermal Cycle

The article discusses the effect of the hybrid-welding process (laser–electric arc MAG Metal Active Gas) on the structure and properties of butt joints (having various thicknesses, i.e., 5 mm and 7 mm) made of steel S960QL. Welding tests were performed in the flat position (PA) and in the horizontal position (PC). Joints made of steel S960QL in the above-presented configuration are present in elements of crane structures (e.g., telescopic crane jibs). The welding tests involved the use of the G Mn4Ni1.5CrMo solid electrode wire and the Ar+18% CO2 shielding gas mixture (M21) (used in the MAG method). Non-destructive visual and radiographic tests did not reveal the presence of any welding imperfections in the joints. The welded joints obtained in the tests represented quality level B in accordance with the requirements of the ISO 12932 standard. Microscopic metallographic tests revealed that the heat-affected zone (HAZ) contained the coarse-grained martensitic structure resulting from the effect of the complex welding thermal cycle on the microstructure of the joints. Destructive tests revealed that the joints were characterised by tensile strength similar to that of the base material. The hybrid welding (laser–MAG) of steel S960QL enabled the obtainment of joints characterised by favourable plastic properties and impact energy exceeding 27 J. The tests revealed the possibility of making hybrid-welded joints satisfying the quality-related requirements specified in the ISO 15614-14 standard.

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