How To Weld The Titanium Tube On The Heat Exchanger?

Titanium tubes on heat exchangers are welded in the process, through continuous exploration, the following experience is summarized.
As titanium melting fluidity is quite good, higher than other metals except silver, so in the all-position welding, it is recommended that the arc is initiated at one o'clock, counterclockwise welding to 11 o'clock using high-frequency arc extinguishing, increase the frequency of arc extinguishing, to avoid the flow of molten droplets is too fast, affecting the quality of the titanium tube weld and the appearance of weld shaping, to avoid uneven weld thinning and thickness. Arc extinguishing should be over the arc point 4 ~ bmm, and arc extinguishing on the copper rod to avoid arc crater.

In summary, in the titanium tube welding, the choice of large nozzle water-cooled welding torch, the use of pure copper rod heat-absorbing fast characteristics, to accelerate the cooling rate of the weld is a proven method. The process measures and operating methods used to protect the overall welding quality of the heat exchanger, received good results, and obtained significant economic benefits.