Analysis of six factors affecting flaw detection of titanium rods and titanium tubes
1. In addition to β segregation, β spots, titanium-rich segregation, and strip α segregation, segregation-type defects are very dangerous. Interstitial α-stable segregation (Type I α segregation) is often accompanied by small holes and cracks around it, containing Oxygen, nitrogen, and other gases that are more brittle. There is also aluminum-rich α-stable segregation (type II α-segregation), which also constitutes a dangerous defect due to accompanying cracks and brittleness.
2. Most of the inclusions are metal inclusions with high melting points and high densities. It is formed by the high melting point and high-density elements in the titanium alloy composition that are not fully melted and left in the matrix, and there are also carbide tool chips mixed in the smelting raw materials or improper electrode welding processes, such as tungsten arc welding, leaving high-density Inclusions, such as tungsten inclusions, and titanium oxide inclusions. The existence of inclusions can easily lead to the occurrence and expansion of cracks in titanium rods and titanium tubes, so they are not allowed to exist.
3. Residual shrinkage cavity
4. The holes do not exist alone, but may also exist in multiple dense forms, which will accelerate the growth rate of low-cycle fatigue cracks and cause premature fatigue damage.
5. Cracks mainly refer to forging cracks. Titanium alloys have high viscosity, poor fluidity, and poor thermal conductivity. Therefore, during the forging deformation process, due to large surface friction, obvious internal deformation inhomogeneity, and large temperature difference between inside and outside, it is easy to generate heat in titanium rods and tubes. Shear bands, which lead to cracking in severe cases, are generally oriented along the direction of large deformation stress.
6. The thermal conductivity of overheated titanium alloy is poor. In addition to overheating titanium rods, titanium tubes, or raw materials caused by improper heating during thermal processing, it is also easy to cause overheating due to thermal effects during deformation during forging, causing microstructure changes. Produces superheated Widmanstatten tissue.
As one of the most professional titanium rods and titanium tubes suppliers in China, we're featured by good service and competitive prices. Please rest assured to buy or wholesale high-quality titanium products for sale here from our factory.
