Laser-arc welding hybrid technology.
Laser-arc welding has several advantages as compared with laser welding and traditional welding technologies. Interaction of laser radiation and electric arc stabilizes the arc for high-speed machining, and the quality of the seams in this case is not inferior to laser.
Laser-arc welding has several advantages as compared with laser welding and traditional welding technologies.
The presence of an additional source of heat makes this technology less sensitive to gaps. The possibility of additional alloying of the weld due to the metal electrode allows to obtain a welded joint with specified strength characteristics. The interaction of laser radiation and electric arc stabilizes the arc for high-speed machining, and the quality of the seams in this case is not inferior to laser.
– the stability of the welding process at high processing speeds,
– control of structure and properties of welded joints;
– ensuring the weldability of special steels and alloys
– reduced welding deformations,
– high quality welds
– increase welding speed in 2-3 times in comparison with arc welding.
– welding of steels up to 20mm thick in a single pass
– welding light alloys up to 10 mm thick,
– welding speed up to 3M/min
– laser radiation power up to 15kW,
– the arc current up to 1500A.
Laser-arc welding technology provide durable welded joints of pipe steels of strength class X80-X100. The possibility of single pass weld metal thickness up to 20 mm allows to increase the Eclipse and thereby reducing the amount of cutting when welding longitudinal seams of tubes. The reduction of heat input and amount of filler metal required to fill the cutting, has a positive effect on the mechanical properties of welded joints, and saving of welding materials.
High welding speeds and low welding deformation, and high level of automation characteristic of the laser-arc technology, significantly improve the productivity of Assembly and welding process and reduce the cost of fabrication of ship structures.
Current trends to reduce weight, material and cost structures in transport, energy, engineering, aerospace industry, electrical and other industries require increasingly widespread introduction of lightweight materials (alloys based on Al it), have high strength and performance characteristics, and developing sustainable lightweight structures, including heterogeneous joints. Their main advantages as structural materials are low density, high specific strength, high corrosion resistance.In connection with wide use in industry of aluminum alloys there is a need for obtaining welded joints that meet the following requirements:
1. qualitative (presence of the upper reverse rollers);
2. the absence of internal defects (pores and cracks);
3. achieving the desired mechanical properties.
For the laser-arc welding of aluminum alloys welded joints satisfy the above requirements: quality formation of a welded joint is formed due to the high welding speed and the presence of a filler metal, whereby it is possible to weld plates with a gap to fill and volatile alloying elements in the weld metal (achieving the desired mechanical properties), evaporating when using highly concentrated energy sources. The absence of internal defects as provided by scanning the laser radiation across the joint, and the change of power of the arc component. In addition to the above advantages, the weld joint formed by laser-arc welding, also have a low welding deformations, which allows to reduce time of process in the manufacture of the final product and reduce its cost.