scholarly journals GMA-laser Hybrid Welding of High-strength Fine-grain Structural Steel with an Inductive Preheating

2014 ◽  
Vol 56 ◽  
pp. 637-645 ◽  
Author(s):  
Rabi Lahdo ◽  
Oliver Seffer ◽  
André Springer ◽  
Stefan Kaierle ◽  
Ludger Overmeyer
Keyword(s):  
Structural Steel ◽  
High Strength ◽  
Hybrid Welding ◽  
Fine Grain ◽  
Laser Hybrid Welding ◽  
Laser Hybrid

scholarly journals Laser hybrid welding of high strength steels

2001 ◽  
Author(s):  
Hans Engström ◽  
Klas Nilsson ◽  
Jan Flinkfeldt ◽  
Tony Nilsson ◽  
Anders Skirfors ◽  
...  
Keyword(s):  
High Strength Steels ◽  
High Strength ◽  
Hybrid Welding ◽  
Laser Hybrid Welding ◽  
Laser Hybrid

Laser Hybrid Welding of Advanced High Strength Steels (AHSS) for Automotive Body Construction

2007 ◽  
Author(s):  
Ramakrishna Koganti ◽  
Sergio Angotti ◽  
Armando Joaquin ◽  
Eric Stiles
Keyword(s):  
Mild Steel ◽  
Light Source ◽  
Welding Process ◽  
High Strength Steels ◽  
High Strength ◽  
Hybrid Welding ◽  
Advanced High Strength Steels ◽  
Laser Hybrid Welding ◽  
Laser Hybrid ◽  
Welding Processes

In response to demands for improved safety standards and fuel economy, automotive OEMs have shown an increased interest for using light weight materials with greater strength. Advanced High Strength Steels (AHSS) have gained popularity due to their superior mechanical properties and weight advantages, as compared to mild steel materials. Welding of AHSS materials remains one of the technical challenges in the successful application of AHSS in automobile structures, especially when durability of the welded structures is required. Currently, various fusion welding processes such as Metal Inert Gas (MIG), Laser and Laser Hybrid are used on mild steel applications. The Laser and Laser Hybrid weld processes continue to gain popularity in automotive applications due to their ability to provide structural integrity and manufacturing efficiency. In laser welding, only a light source is used to join materials together. In laser hybrid, both a light source and metal filler are used to join the materials. In this paper, the laser hybrid joining process on AHSS materials (DP780 and Boron) is investigated. Influence of heat from Laser Hybrid welding process and its effect on the steel is discussed.

Laser Hybrid Welding in Stainless Steels and in High Strength Steels

2007 ◽  
Vol 539-543 ◽  
pp. 3991-3995 ◽  
Author(s):  
Lars Erik Stridh
Keyword(s):  
Laser Welding ◽  
Stainless Steels ◽  
High Strength Steels ◽  
High Strength ◽  
Hybrid Welding ◽  
Laser Hybrid Welding ◽  
Welding Head ◽  
Laser Hybrid ◽  
Joint Volume ◽  
Experimental Stage

Laser welding is a well known process, so is GMAW. But the joining of the processes, the so called laser hybrid welding is not that known, yet. Looking into the laser welding we realise, after many years use that there are some limitations to the process. One of the most significant is that the process deals poorly with the ability to bridge gaps between plates that are to be joined. This has its drawbacks on welding economy, the tolerances on ingoing parts has to be very high, the laser process can not tolerate more than 0,1 mm gap between the plates. The GMAW process on the other hand has the ability to deal with the joint tolerances in a better way, the backside is of course the productivity and the penetration properties. In the laser hybrid process where the two processes are joined in the same welding head, we are experienceing a great improvement in several properties. Gaps are no longer a big problem, the process can deal with gaps up to 2,0 mm with the present technology, (it is possible to coop with larger gaps using an oscillation of the laser beam, but this is only on experimental stage yet). This now means that costs for ingoing parts will be reduced. Process stability at high welding speeds is acchived. There are many advantages in high strenght steels that are sensitive to heat input; better mechanical properties are possible to obtain. Looking at the stainless materials the process has many advantages, one of the most important is the joint volume reduction in thicker materials, another is the ability to weld in duplex stainless steels.

Assessment of different laser hybrid welding processes

2008 ◽  
Author(s):  
Paul Kah ◽  
Antti Salminen ◽  
Jukka Martikainen
Keyword(s):  
Hybrid Welding ◽  
Laser Hybrid Welding ◽  
Laser Hybrid ◽  
Welding Processes
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