Titanium is known as the "third metal". It has light-specific gravity and good plastic toughness. Its greatest advantage is its high specific strength. At the same time, it also has good heat and corrosion resistance, which can exceed 10 times of Crl8Ni9Ti. However, titanium alloy has a great affinity for oxygen, nitrogen, hydrogen, and carbon at high temperatures. Titanium starts to absorb hydrogen at 250 C, oxygen at 400 C, and nitrogen at 600 C, which brings certain difficulty to welding.
Manual argon arc welding and automatic argon arc welding of titanium alloys have been successfully applied in titanium alloy components. Its advanced welding methods, such as laser welding and vacuum electron beam, are becoming more and more mature and can process qualified products smoothly.
Because of the good weldability of titanium alloys, the main load-bearing welding structure in aircraft is mainly made of titanium alloys.
Aircraft titanium alloy welding is mainly based on electron beam welding, laser welding, and argon arc welding. Although high-energy beam welding is called an advanced welding method and has been widely used in key important structures, argon arc welding is still widely used in aircraft due to its low assembly accuracy, flexible operation, and strong adaptability to non-linear welds.
The welding performance of titanium alloy is obviously different from that of steel material. Especially, the protection requirement for areas higher than 400 C during welding is very high. Therefore, we need to carry out research on titanium alloy welding. Baoji Fairy Titanium Industry Co., Ltd will provide you with technical support.
