A
titanium alloy plate
welding method capable of improving
welding performance comprises the following steps that S1, a Ti6Al4V
titanium alloy plate with the thickness
ranging from 2 mm to 4 mm is taken, a V-shaped
welding groove is formed in the position to be welded, a
butt joint is formed, the groove angle of the welding groove ranges from 18 degrees to 22 degrees, the width of an upper opening of the groove ranges from 0.8 mm to 1.2 mm, the groove gap ranges from 0 mm to 1 mm, and the truncated edge of the groove ranges from 0.1 mm to 0.5 mm; s2,
metal particles are weighed according to the
mass percent of 6wt% of Al, 4wt% of V, 0.1-0.7 wt% of Ce and the balance Ti, an
alloy ingot is prepared through
vacuum induction melting, and then the alloy
ingot is machined into a
transition layer matched with the welding groove; s3, the
transition layer is placed in a welding groove of the Ti6Al4V
titanium alloy plate
butt joint, and a to-be-welded
welding joint is formed; s4, pulse
laser welding is conducted on the to-be-welded
welding joint; according to the
welding process parameters, the
pulse frequency ranges from 20 Hz to 30 Hz, the pulse width ranges from 23 ms to 27 ms, the welding speed ranges from 22 mm / s to 28 mm / s, the
laser base value power ranges from 2800 W to 3200 W, the
laser peak power ranges from 3800 W to 4200 W, and the protective
argon flow ranges from 12 L / min to 20 L / min. The welding method is low in cost, high in efficiency and good in joint quality, and the obtained welding seam is excellent in performance.