Y-12 development organization technical progress report. Part 4, Assembly technology/compatibility and surveillance period ending September 30, 1993
- comp.
The Super Collider is a high-energy scientific instrument composed of a 53-mile-long ring of proton accelerators designed to collide protons and evaluate the emanating particles. The Oak Ridge Y-12 Plant is under contract to perform work for the Superconducting Super Collider Laboratory (SSCL) and has been asked to develop manufacturing processes for components of the gammas, electrons, muons (GEM) detector. Three welded subassemblies are involved in the fabrication of these conductors. The superconducting cable is enclosed in a stainless steel conduit, which is then enclosed in an aluminum sheath. The ends of the conductor are terminated with a connector assembly joined to the superconductor, the conduit, and the sheath. Initially, the conduit weld was to be a single-pass, autogenous gas-tungsten arc weld. The authors made a great effort to get full penetration without root reinforcement on the inside of the tube. When the authors were unable to meet all of the weld requirements with an autogenous weld, they shifted development efforts to making the weld using an automatic gas-tungsten arc tube welding head with an integral wire feeder. Because reinforcement at the root continued to be a problem, the authors decided to make the weld in two passes. To achieve the desired weld reinforcement on the outside of the tube, the authors developed a welding procedure in which an autogenous pass is used to join the tube ends with the necessary minimum pushthrough on the inside of the tube and filler metal is supplied during the second pass. This two-pass weld required a weld joint with a flat butt for the root pass and a V-groove for the filler metal pass. A 272-ft conduit was made using this two-pass welding procedure for a test at the University of Wisconsin.
- Research Organization:
- Oak Ridge Y-12 Plant (Y-12), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 10143378
- Report Number(s):
- Y-2463-4; ON: DE94010047
- Resource Relation:
- Other Information: PBD: 27 Dec 1993
- Country of Publication:
- United States
- Language:
- English
Similar Records
Long Length Welded NbTi CIC Superconducting Cable for Accelerator Applications
Structure/property relationships in multipass GMA welding of beryllium.