Glad you received the info.
We have recently received small amounts of Ti pipe and fittings from:
TICO Titanium, Inc
52900 Grand River Avenue
New Hudson, MI 48165
Ph- 248-446-0400
Fax- 248-446-1995
and
Titanium Industries, Inc
Parsippany Warehouse
181 East Halsey Rd.
Parsippany, New Jersey 07054
Ph-973-428-7678
Fax-973-428-7684
I aslo am working on figuring out the best way to weld in position, outside of a purge box. If you take the time to create sheilding fixtures that fit the materials you are working on, it works fine. I'll fax you some ideas for trailing and backing fixtures that work pretty well.
One effective way of sheilding for small parts outside of a box is to fix a argon line to the bottom of a bowl, diffuse the gas so that it will fill the bowl instead of shooting straight through, and weld your parts inside the bowl. Beware of excessive gas pressures or non-diffused gas in your sheilding fixtures as gas turbulence is detrimental. Also, please keep in mind that as argon is heavier that air, without proper ventilation it will displace the air and fill a room, which could cause asphyxiation. That would not be good.
Lately I have been consulting with a Welding Engineer who has given me some very good advice:
Discoloration of a straw or blue color is mainly a surface affect and does not mean a contaminated weld, but does indicate that your sheilding fixtures are allowing some oxygen in and need to be adjusted before you continue welding. Light blue fading to gray or dull gray discoloration is a definite indication of a contaminaed weld and needs to be rejected.
While Tig welding, it is the natural tendency of the welder to dip the rod into the puddle and pull it away repetively. If the rod tip is removed from the gas sheilding while it is still hot, it will become contaminated. This contamination will not produce a discoloration indication. That leaves the only true way of determining if the weld is contaminated is by hardness testing. If the Brinell hardness of the weld is 30 points or greater than of the unaffected base metal, it is contaminated.
Good luck and let me know if the fax comes through as I've been having some trouble with the machine.
Tim
Tim, again thank you for your wealth of information.
We received your fax on Saturday our time and it appears that there was difficulty in sending one page, I think it may have been page 7 or 8 but it obviously was resent as the full copy was in the fax pages.
Thanks for your comments about the Olympics we feel that the organizers did a fine job as well. "good luck to ALL the athletes at the games"
regards Andrew.
Tim, we have finally found some Titanium tube to have some practice with and although it is only 3/4"x.035" wall it will suffice until we get a procedure working for us.
Our 1st attempts were with a too small gas lens and without any extra external gas shielding but at least we can see where our mistakes are being made and we can only get better as we get more practice.
I'm very surprised by how few amps are required to get a molten pool, in this case about 25 - 30 on my OTC machine.
Again, I must thank you for all your help. It would have been a steep learning curve for us here without your invaluable assistance.
If ever your in in Australia, let us know and we'll buy you a drink or three!
Kind regards Andrew.
Your Welcome!
That's one of the great things about this site. Almost everyone passes on fairly valuable information and takes the time necessary to do so, just to help someone else. Repay the favor by passing it down the line and help someone when you're able.
If I ever make it to Australia, I'll take you up on the drink offer!
Best Regards,
Tim
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