The welding properties of titanium and titanium alloys have many remarkable characteristics, which are determined by the physical and chemical properties of titanium and titanium alloys.
1. Influence of gas and impurity pollution on welding performance
Titanium and titanium alloys are relatively stable at room temperature. However, the test results show that the liquid droplet and the molten metal in the welding process have a strong absorption of hydrogen, oxygen and nitrogen, and in the solid state, these gases have acted with it. As the temperature increases, the capacity of titanium and titanium alloy to absorb hydrogen, oxygen and nitrogen also increases significantly. Hydrogen absorption starts at about 250℃, oxygen absorption starts at 400℃, and nitrogen absorption starts at 600℃. After these gases are absorbed, welding joints will become embrittlement directly, which is an extremely important factor affecting welding quality.
2. Welding joint crack problem
3. Porosity in welding seams
