Advertise on Bikeforums.net



User Tag List

Results 1 to 7 of 7

Thread: Flame setting

  1. #1
    Newbie
    Join Date
    Aug 2008
    Posts
    2
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Flame setting

    Hello, Can anyone tell me what's the difference in results in brazing chromolly with a neutral, carbonizing, and oxyidizing flame? Which will yield better results etc.
    Thanks, Zig

  2. #2
    Randomhead
    Join Date
    Aug 2008
    Location
    Happy Valley, Pennsylvania
    Posts
    12,083
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I usually go for slightly carburizing or neutral flame. I'm not sure it really matters much for brazing.

  3. #3
    I ride my bike Revtor's Avatar
    Join Date
    May 2004
    Posts
    411
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    just keep it out of the oxidizing range (loud hissing) and you should be good to go..

    ~Steve

  4. #4
    Framebuilder
    Join Date
    Dec 2007
    Posts
    461
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Always a neutral flame for fillet brazing, you can get away with a more carburizing flame on lugs- as was said, never an oxidizing flame.

  5. #5
    Senior Member sannerbikes700's Avatar
    Join Date
    Dec 2008
    Location
    Palo Alto CA
    Posts
    92
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Try a bigger carburizing flame for silver lugs, a smaller/louder carburizing flame on brass lugs, and a neutral to slightly carburizing for brass fillets and brass dropouts.

    Good luck!

  6. #6
    Banned
    Join Date
    Aug 2005
    Posts
    5,117
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I have seen all kinds of different flames used. The idea of the oxydizing flame being bad is that it has a lot of oxygen in it, and this will tend to supply oxygen to the hot metal increasing the chance of oxydizing the steel. This is a reality with gas welding on steel, since no flux is required. If your flux is holding up then your steel is protected from oxydation so this ought not to be a problem. So it could be yet another crossed line with welding lore.

  7. #7
    I ride my bike Revtor's Avatar
    Join Date
    May 2004
    Posts
    411
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    perhaps welding lore, but flux has a limited capacity to eat up oxides, so unless there is an actual reason to go with an oxidizing flame, I'd stay away from it.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •