GR9 titanium alloy main argon arc welding process to pay attention to what?

Argon arc welding titanium alloy pipe welding is usually the site of all-position welding, the difficulty of its stainless steel pipe welding than much higher than the titanium and its alloys above 400 ℃ weld zone must be protected, because of its chemical nature is particularly active, it is easy to absorb hazardous gases, resulting in a decline in material properties, and even cracks. So when welding should pay special attention to the following matters.

1, argon arc welding in the welding of titanium pipe and its titanium alloy pipe, welding material selection is basically the principle of equal strength, can not find a suitable welding material, can be used to cut from the base material to solve the problem; and argon selection will have a direct impact on the hardness and toughness of the weld, and on the welding cracks have a significant impact, so the requirements for the selection of (especially pure titanium) high purity argon gas (99.99%).

2, welding titanium tube cutting and rupture production should be used cold processing methods, shall not make it overheating and discoloration. In the bevel inside and outside the surface of not less than 20mm range with a grinding wheel or stainless steel wire wheel to polish out the metal luster, with a scraper to trim the bevel burr and then polished smooth, to avoid hanging on the cloth wire in the cleaning.

Chemical Composition Ti Gr 9