Compared with ordinary titanium alloys, high temperature titanium alloys have higher performance requirements, especially in high temperature resistance. The main reason lies in the application of high-temperature titanium alloy in the key parts of aircraft engine compressor discs, blades and casing, etc. Therefore, high temperature titanium alloys are required to have good room temperature properties, high temperature strength, creep property, thermal stability, fatigue property and fracture toughness. The detection of high temperature titanium alloy has important guiding significance for the research of its composition formulation and process. As a professional titanium alloy inspection agency, Byrne inspection has been committed to high-temperature titanium alloy inspection services.
It can be seen that the titanium alloy grades suitable for temperatures below 500℃ mainly include TC4, TC6, Ti811, etc. This kind of high temperature titanium alloy processing technology is not complex, we will not analyze here. TC11 is a high temperature titanium alloy used at 500℃. However, with the continuous progress of detection technology and the continuous development of forging technology, after the high-temperature deformation and toughening treatment of TC11 titanium alloy, the service temperature can be increased from the original limit of 500℃ to 520℃.
Ti55, Ti633G and Ti53311S are three brands of high-temperature titanium alloy which can be used in 550℃ high-temperature working environment. The Ti55 component analysis was mainly ti-5al-4SN-2zR-1mo-0.25 Si-1nd. The composition analysis of Ti633G was mainly ti-5.5 al-3.5 Sn-3ZR-1Nb-0.3 Mo-0.3Si-0.2Gd. The component analysis of Ti53311S was mainly TI-5.5 al-3.5 Sn-3zr-1mo-1NB-0.3 Si. Ti55 high temperature titanium alloy has excellent thermal strength and thermal stability, so it is often used in the manufacture of aircraft engine parts. Ti633G high temperature titanium alloy has good creep resistance, thermal stability and fatigue performance, so its parts can ensure good tissue uniformity and performance average. Ti53311S high temperature titanium alloy high temperature instantaneous strength, good bearing capacity and welding performance. So in some of the satellite engine injectors will be applied.
High temperature titanium alloy grades Ti60 and Ti600 suitable for use at 600℃. The component analysis of Ti60 was mainly ti-5.8 Al-4.8 Sn-2zR-1mo-0.35 Si-0.85ND. The component analysis of Ti600 was mainly ti-6al-2.8 Sn-4zR-0.5 Mo-0.4Si-0.1Y. At present, Ti60 and Ti600 high temperature titanium alloy child research stage, the specific mass production has not been applied. The main technical difficulty lies in the control of high temperature creep property and thermal stability property. Of course, this requires sufficient testing data to support, and scientific and accurate requirements are required for the fluctuation of alloy composition, clearance element content control, impurity content removal and improvement of processing technology.
