钛的焊接一般采用钨极惰性气体焊(TIG)方法,但是为了加快焊接速度以提高作业效率,采用电极丝自体熔融的熔化极惰性气体保护焊(MIG)方法较为有利。但由于钛的热传导率低,在钛电极丝通电时由于电弧热及焦耳热,焊丝易燃,使电弧长度变长,另外钛易氧化和氮化,因此必须用氩气保护。 TIG welding is generally used for titanium welding, but in order to speed up the welding speed and improve the working efficiency, it is more advantageous to use MIG welding method with self-melting wire electrode. However, due to the low thermal conductivity of titanium, due to the arc heat and Joule heat when the titanium wire is energized, the wire is flammable and the arc length becomes longer. In addition, the titanium is easily oxidized and nitrided, and thus it must be protected by argon gas.