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  1. Electrofusion

    Need to straighten 2219 bar after gun-drilling and OD turn...

    I'm assuming we'll just do a furnace cool after straightening it. I'll take your word for the 250ºF - but it sounds kind of cool compared to the extended 250ºC (482ºF) bakeout it will see later.
  2. Electrofusion

    Need to straighten 2219 bar after gun-drilling and OD turn...

    @mfgenggear: Any basics on how to warm straighten? I have both atmospheric and vacuum furnaces at my disposal in-house... @MikeHalloran: Definitely a truckload of work. Material selection in this case is driven by the ability to weld it to Beryllium and its behavior in high radiation...
  3. Electrofusion

    Need to straighten 2219 bar after gun-drilling and OD turn...

    @TVP: Intial temper is T3511. End temper is not specified or critical for strength of the end assembly. (Refer to post above regarding specifics of mass and loading.) Would you recommend a 250ºC stress relieve before gundrilling and an additional intermediate 250ºC stress relieve prior to...
  4. Electrofusion

    Need to straighten 2219 bar after gun-drilling and OD turn...

    @ MikeHalloran: I've considered that as a possibility. It may be worth noting that there is very little weight supported by the tube. The overall assembly is a beampipe measuring 8.4 feet in length. It is terminated with Ø2.75" ConFlat Flanges at each end. The pipe body is ConFlat to...
  5. Electrofusion

    Need to straighten 2219 bar after gun-drilling and OD turn...

    The machining is done, as you can probably imagine, in several steps by two different shops. The initial bar stock (not tube) is approximately 0.300" oversize in diameter. The ends are faced and the full length is 'skimmed' (~0.050" - 0.100") to true it up straight and centered for the...
  6. Electrofusion

    Need to straighten 2219 bar after gun-drilling and OD turn...

    Like the subject says... I've got a component that needs to be straightened after machining and I'm looking for the best method. Details: Initial material is Ø2" x 36"L 2219-T3511 bar stock. It is gun drilled to final ID of 1.575" +.005"/0" full length. Subsequently, it is machined to a...

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