Heat resistant properties of titanium

1, room temperature performance
Have certain strength, pure titanium titanium alloy Titanium CN with high strength.
First practical titanium alloy is in 1954 the successful development of Ti 6 al 4 v alloy, because of its heat resistance, strength, plasticity, ductility, formability, weldability and corrosion resistance and biocompatibility are better, and become the industry in ace alloy, titanium alloy, the alloy usage has 75% ~ 85% of all titanium alloys.
2, high temperature performance
The aircraft engine components, skeleton, skin, using titanium alloy fasteners and landing gear.Temperature is higher than aluminum alloy several baidu, under moderate temperature can still maintain the required strength, can work under the temperature of 450 ~ 500 ℃ long these two types of titanium alloy at 150 ℃ ~ 500 ℃ range still has high specific strength, and aluminum alloy at 150 ℃ than strength decreased obviously.Working temperature can reach 500 ℃ of titanium alloy, aluminum alloy under 200 ℃.
Most of the titanium alloy at 500 ℃ still has certain mechanical properties, but generally only used in about 450 ℃.
Titanium alloy is mainly to improve the performance of high temperature by looking for the ideal of the alloy system and improve the process to achieve.Such as adjustment of alloying elements, improve the creep strength, thermal stability and resistance to salt stress corrosion of heat capacity, improve the system of heat treatment, pay attention to the reasonable operation, to prevent possible contamination of gas and other substances, etc all can achieve the above purpose.Only to develop a good performance, simple process, low cost of materials is also difficult, because often due to pay attention to the requirements (such as high intensity) on the one hand, is probably in another performance (such as creep properties) are affected.So, while countries are heavily in research.But can be used long-term production, through the practice test, with excellent comprehensive performance of titanium alloy were not a lot.
3, low temperature performance
Some pressure vessel (space on the device of liquid oxygen, hydrogen, helium, and fluorine tank) working temperature - 183 ℃, 253 ℃, respectively - 269 ℃ and 212 ℃, required materials at very low temperatures still has good physical and mechanical properties.
Pure titanium can be applied in the environment of - 196 ℃, and Ti - 5 al - 2.5 Sn (TA7) and Ti al - 5-4 v (TC3) using temperature can reach 253 ℃, AT2 series alloy (Ti, Zr, for matrix, with ternary alloy composed of niobium, vanadium and molybdenum) the low temperature performance is very good.Now with ways to reduce the aluminum or oxygen content to explore ultra-low temperature of new titanium alloy materials.