Key Applications And Innovative R&D Of Titanium Alloys in Modern Space Rocket Technology

With the rapid development of the space industry in the 21st century, the requirements for space rocket technology have become increasingly stringent, especially the research and development of high impulse thrust-to-weight ratio engines, which has become the key to promoting the progress of space technology. In this context, titanium alloy, as a metal material with excellent high-temperature strength, low-temperature toughness and excellent processing performance, has become a core material in advanced space rocket technology products.
Exploration of titanium alloy applications in extreme environments
The Russian Institute of Metals is working on process optimization and performance enhancement of the BT6c alloy for components of space rockets that are subject to extreme temperatures (-200°C to higher), such as large φ600mm drop-forged parts, accumulator plates, bearing bracket blanks, and tube fittings. The alloy not only works stably at -200°C, but its working temperature limit has been further lowered to 253°C by particle metallurgy technology, which significantly improves the overall performance of the material. This innovative process ensures the homogeneity of the fine crystal structure in all parts of the blank, realizing isotropic properties and providing reliable material support for rocket components under extreme conditions.

Wide application and optimization of two-phase titanium alloys
In the wide application of space rockets, two-phase titanium alloys, such as BT6c, BTl4, BT3-1, BT23, BTl6, BT9 (BT8), etc., have become the material of choice for key components by virtue of their excellent heat treatment strengthening properties. For example, BT6c alloy is widely used in a variety of components with high strength requirements in the heat treatment strengthened state of σb=1050MPa-1100MPa. BT14 alloy, on the other hand, shows its unique advantages in the high-strength interval of σb=1100MPa-1150MPa, which can not only be used for the manufacture of tubular beam shaped components with diameters ranging from 80mm to 120mm, but also can be used as a fastener in a low-temperature environment of -196℃.