Do you think TIG welding titanium is hard?
The answer is YES!
Well, it's hard because there are more things that need attention than with TIG welding stainless steel, Also the rod becomes very gummy when you are welding and it wants to stick on the outskirts of the weld.
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| Welding Titanium UV Reactor |
At high temperatures, titanium becomes highly reactive to chemicals in its environment.In regular air, welding contaminates titanium with carbides, nitrides, and oxides that make the weld and heat affected zone brittle, resulting in lower fatigue resistance and notch toughness.
Based on above important difficulties, we need to do more preparation work before welding titanium.
1) Inspect raw materials.
First of all, we have to ultrasonic testing of raw materials: we require no pits, voids, inclusions, cracks, splits., etc. are allowed regardless of size.
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| Welding Customized Titanium Fittings |
2) Clean, Clean Clean.
- Remove any oil, dirt, or grinding dust from the surface to be jointed.
- Remove the last remaining organic compounds just before welding.
- Joint surfaces must be smooth, clean, and completely free of contamination.
Weld joints and wire must be free of mill scale, dirt, dust, grease, oil, moisture,
and other contaminants. Any contaminants introduced to the titanium will degrade
its performance and corrosion resistance.
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| Welding Grade2 Titanium Fittings with out flange |
3) Using auxiliary tools to fix welding parts
This can avoid mistake and thermal deformation during welding.
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| Welding Titanium Elbows with black flange |
4) Using the correct filler wire.
With inert gas for protection, to prevent oxygention react with air, welding with TIG machine. The thicker of the housing with the chiker the welder wire and the bigger the current.
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| Welding Titanium Pipe with ear flange |
5) NDE inspection
The welding parts will be do X-ray detection after completed welding.
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| Welding Titanium pipe with square flange |
Three Titanium Welding Mistakes
a) Using the wrong filler metal - Trying to weld titanium with anything other than titanium turns the weld into a hard as glass material. You can hear it cracking before it even cools off.
b) Not shielding the weld puddle adequately - When Titanium gets red hot, it loves to suck in all kind of impurities like oxygen and hydrogen. Once this happens, you are screwed, glued, and tattooed. Game over. The weld has to be removed.
c) Not cleaning the metal - porosity is a problem when TIG welding titanium. Anything on the surface like oil, or dust, will cause porosity.
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| welding titanium elbows 90 degree |
IMPORTANT!!! BJMK can provide the most professional welding service for Titanium, Tantalum, Niobium, Zirconium and other exotic metals.
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| If you want to know more about titanium materials, please click our logo to contact us! |
