Basic Classification：

Industrial pure titanium welding wire: such as ERTi-2, elongation rate>30%, suitable for low strength structural components;

Titanium alloy welding wire:

ERTi-7: contains 15% molybdenum and is resistant to hydrochloric acid corrosion;

ERTi-5: Al/V strengthening, strength>900MPa.

Procedure：

1. Pre weld treatment

Surface cleaning: mechanical polishing, hydrofluoric acid nitric acid pickling.

2. Gas protection:

Main protection: Welding gun with argon gas covering the melt pool;

Back protection: Pipeline argon filling/drag cover.

Application scenarios：

Chemical pressure vessel: TA9 welding wire welding reaction kettle, resistant to hydrochloric acid corrosion;

Aviation thin-walled parts: TC4 grade welding wire repair engine blades;