AWS C7.6-C7.6M:2017 pdf download.Process Specification and Operator Qualification for Laser Hybrid Welding
1.1 Scope. 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 are 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 fller 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.
1.1.1 Materials. This specification covers all major engineering alloys including the following:
(1) Ferrous Alloys (e.g.. steels and stainless steels)
(2) Non-Ferrous Alloys (e.g.,. AI alys, Ni alloys, Ti alloys, Superalloys)
(3) Heat-Resisting Alloys (e.g., Mo alloys, Ta alloys, W alloys)
(4) Other Metals (e.g.. Be and Cu alloys, precious metals)
Work performed in accordance with this standard may involve the use of materials that have been deemed hazardous,and may involve operations or equipment that may cause injury or death. This standard does not purport to address all safety and health risks that may be encountered. The user of this standard should establish an appropriate safety program to address such risks as well as to meet applicable regulatory requirements. ANSI Z49.1 should be considered when developing the safety program.
3. Terms and Definitions
AWS A3.0M/A3.0, Standard Welding Terms and Definitions provides the basis for terms and definitions used herein.The terms and definitions used in this text are generally specific to laser hybrid processing. Terms that are not part of common welding vocabulary are defined, and the definitions of some standard welding terms are changed slightly to more accurately describe those terms as they apply to laser hybrid welding processes. A list of acronyms used within the document can be found in Annex E. However, the following terms and definitions are included to accommodate usage specific to this document.AWS C7.6-C7.6M pdf download.