Tungsten inert gas (TIG) welding — also known as gas tungsten arc welding (GTAW) — is a process that is used to join thin, non-ferrous metals. Electricity flows through a non-consumable tungsten electrode and creates an arc to the materials to be joined. The weld area is kept free from atmospheric contaminants by the presence of a gas (typically argon, helium, or a mixture of the two) that surrounds the weld during the bonding process. A filler material is frequently fed into the joint, although some metals do not require a filler.
TIG welding creates a strong bond and gives our engineers more control over the weld than with alternate forms of welding. The process was perfected in the 1940s and quickly gained popularity in the aerospace industry. TIG welding can be utilized to join most nonferrous metals, including stainless steel, aluminum, magnesium, titanium, and platinum, and can be employed to create bonds between dissimilar materials. Unlike other methods that can change the chemical composition of the metals involved through volatilization, the tungsten inert gas (TIG) welding produces a joint that matches the original metals in chemical composition, making the bond highly resistant to corrosion and cracking over the long term.
The precision of TIG welding is highly desirable in the manufacture of medical devices, where finely detailed work precludes other methods. Although this precision is accompanied by a level of difficulty that surpasses that of other methods, Proven Process' expert welders have extensive training and experience in TIG welding and are held to the highest standards. The quality of their work is evident in our finished devices. We also use automated TIG welders when possible for large volume production.