What are the conditions for welding titanium screws?

Industrial titanium screws do not require special preparation and can be welded by contact welding. When there is a thick oxide film layer, it needs to be removed with a mechanical cleaning method or in a 5% hydrofluoric acid solution.

The arc welding of titanium screws is carried out in a clean gas (helium, argon) gas weaving, and can achieve better results with direct current, at this time the tungsten electrode is the cathode.

Direct welding of titanium screws with nickel, bromine-chromium and other nickel-containing alloys is not suitable because of the formation of harmful eutectic crystals. In this case, between the materials of different properties, it is necessary to place shims with a thickness of 15-20 microns, which are usually molybdenum, tantalum or niobium. Subject to this condition, titanium screws or parts welded with nickel or nickel alloys can be annealed and degassed well in vacuum or inert gas at temperatures up to 1500°C.