Laser hybrid welding has its roots since the inception of laser processing in industrial applications. The early use of amalgamated welding process can be seen as early as 1970 with recent advancement in state of the art machinery now occupying the current dominion from its predecessors. The work of Eboo and Steen brought in the current generation laser hybrid welding to the heavy metals industry.
Laser Hybrid Welding combines the principles of laser beam welding with arc welding in the same weld pool. The laser and the arc may both be different welding heat sources but both work well under a gaseous shielding atmosphere under ambient pressure, making it possible to combine heat sources into the unique property of Laser Hybrid Welding. This is widely in use for welding of steel, aluminum and other alloys.
The latest innovation in the field is the process of combining hybrid laser welding technology with a deep weld penetration which uses low heat input associated with laser welding that has excellent weld properties and superior gap tolerance of a Gas Metal Arc Welding (GMAW). Adding GMAW to welding mix while making use of laser hybrid welding enhances the metallurgical stability of frames to withstand resistance and produces welds of greater strength and brittleness. This new innovation to laser hybrid welding is making significant headway in the aerospace and shipbuilding industry.
As a result of its apparent advantages, Laser-arc hybrid welding has become more attractive to prospective industries like aerospace, automotive, shipbuilding, oil and pressure vessel industries. The process is now in use in various industries like:
- Oil and gas industry:
There has been a continued interest in the industry for steel pipes and laser sources to help increase the overall joint completion rates. Hybrid Welding continues to be an important aspect of the industry.
The cost associated with distortion connection and rework can be reduced and can be rectified with the use of hybrid welding, which helps lower heat inputs and distortion as compared to Submerged Arc Welding (SAW) or Metal Active Gas Welding (MAG).
Conventional Arc Welding methods can improve the low distortion caused due to hybrid railcar seam welding which can be corrected to reduce fabrication and reduction of higher welding speed. This can improve the overall welding time.
Autogenous Laser Welding is a slow and demanding process which can be corrected with the use of hybrid welding. The high welding speed of the hybrid process is a useful aspect of the high production volume environment of roadways.
Benefits of the Laser Hybrid Welding process
The use of the process has many significant benefits detailed out below:
- Lower heat input means the unique fusion of arc and laser beam welding is highly suitable for joining high-performance carbon low alloy and stainless steel.
- An improved weld quality which reduces the probability of hot cracking, internal porosity and content reduction.
- Increased welding speed and increased single pass penetration depth.
- Greater tolerance to variation in joint fit-up.
- Better control of metallurgical variables through filler addition like weld microstructures.
- Reduced structural and manufacturing costs.
Montanstahl has been active in the production and supply of high-quality steel profiles and stainless steel structural sections. The company is involved in making all types of steel ranging from low carbon, through SBQ to stainless steel and tool steel grades to businesses all around the world.