[FrameRider]

to All:

A numer of years ago ('82 timeframe) Bicycling magazine out out a "bike Tech" newsletter that had a series of white papers on brazing. Is there a similar series based on Tig welding?

I have just scored a Steelman stage Race :D & would like to know more about the metalurgy behind Tig welding the new "made-for-Tig" steels. I am a mechanical engineer (but not a builder) & have several kindred spirits working with me. I am looking to expand our "knowledge base" & make our frame discussions more interesting.

~Ted

[Forum Team]

you could try this link:
TIG welding cro-mo
...not great, but a starter. The Lincoln site is a good source of info.
Lincoln Electric

[ppr]

On the topic of Tig, i was wondering how many of you use pulse? I personally don't on Al as i just feel more comfortable setting my balance and frequency and running with a constant steady arc. I haven't made a steel frame and was wondering if there were benefits of pulse for steel?

[nicrump]

I have not done much with my tig setup but what little I have done on thin steel, I have gotten better results with pulse. No dippingbut rather feed and let the arc take care of the rest.

However, I am not an expert at tig. What do the others say?

This post has been edited by nicrump: 09 May 2004 - 10:21 PM

[Walt]

I wouldn't call myself an expert at TIG either (no aluminum, no titanium) but I run the pulser (at about 1 hertz) all the time. I find that it helps to keep me in a rhythm, of sorts, and (if you've got good pedal control) lets you do long smooth runs and keep the travel speed consistent.

Another question for the TIG folk - what weld sequences are people using? I'm happy with the alignment results I get (no cold setting, ever) with:
1. Top right quadrant, TT/ST
2. Top left quadrant, TT/ST
3. Bottom left quadrant, TT/ST
4. Bottom right quadrant, TT/ST
5. Same quadrant sequence, TT/HT
6. Same quadrant sequence, DT/HT
7. Same quadrant sequence, DT/BB/ST

But I'd love to hear if people are doing something different.

-Walt

[ppr]

After fully tacking, i completly weld st / bb, then modify the dt/bb mitre to fit again, then i weld st/tt upper left, ht/tt upperleftdt/ht upper left, dt/st, then right upper, left lower right lower, what i can i weld in the jig, but if it makes life easier i pull it out. Last of the main triangle welds for me is the dt/bb.