Civil Engineering Association

AWS C7.6/C7.6M-2017: Process Specification and Operator Qualification for Laser Hybrid Welding

This specification covers processing and quality control requirements for Laser Hybrid Processing. Equipment includes any laser source (examples include, but are not exclusive to CO2, Nd: YAG, Diode, Ruby, Yb Fiber (Fibre), Yb Disk (Disc), Nd: Glass) in combination with an arc welding system (power supply, wire feeder, torch, etc.) as defined by AWS A3.0M/A3.0, Standard Welding Terms and Definitions Including Terms for Adhesive Bonding, Brazing, Soldering, Thermal Cutting, and Thermal Spraying.

Specifically, this specification covers both (1) Laser Hybrid Arc Welding that uses both a laser to create a keyhole and GMAW (Gas Metal Arc Welding) to add filler material (resulting in a weld bead that is deeper compared to a traditional arc weld and wider than an autogenous laser weld) and (2) Laser Hot Wire Processing that uses a laser to create a conduction mode or keyhole mode molten puddle and an auxiliary power supply that adds heat to the filler wire that enters the puddle (resulting in a lower heat input weldment that could be used to weld joints or to add a hardfacing overlay).

Tutorial information regarding techniques of welding or details of machine setup or operation of laser hybrid processing and laser hybrid processing systems is beyond the scope of this specification. For more information on this subject, refer to AWS C7.2. Recommended Practices for Laser Welding, Cutting, and Related Processes.

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