Instructional Welding Video Two:
Titanium Welding in an Argon Gas Environment
Titanium is called reactive metal meaning it has a strong affinity for oxygen. At room temperature titanium reacts with oxygen to form titanium dioxide. This passive, impervious coating resists further interaction with the surrounding atmosphere. It gives titanium its famous corrosion resistance. The oxide layer must be removed prior to welding because it melts at a much higher temperature than the base metal and because the oxide could enter the molten weld pool, create discontinuities and reduce weld integrity.
Welding titanium requires extreme cleanness. The base metal, filler metal, and welding environment must be immaculately clean. Contamination by natural body oils, oils from the forming and drawing process, shop dust, paint, dirt, cutting fluids, and lubricants all can lead to embrittlement and weld failure.
Dynamic Fabrication does titanium welding in an argon enclosed atmosphere. This enclosure is filled with argon as the air is vented in order to provide an inert atmosphere. Special gloves and viewing ports give welders access to the parts while the enclosure protects the titanium parts during the weld and cooling process. Pure argon is recommended for welding titanium because of its high purity and low moisture content. Typical specifications suggest that shielding gas be at least 99 percent pure with no more than 20 parts per million (PPM) of oxygen.
Dynamic Fabrication is your source for titanium welding, fabrication, machining, and assembly. We produce high quality work ranging from precision parts to complete assemblies. DFI is certified to weld all metals. We guarantee superior workmanship and quick turn-around. Founded in 1981, Dynamic Fabrication serves a wide variety of industries.