Titanium has a very wide range of uses in the military industry. Nuclear-powered submarines, hydrofoil boats, mortar barrels, tank shields, bullet-proof vests and many other uses titanium. According to the information, a typhoon-class nuclear submarine uses up to 9,000 tons of titanium, which shows that military engineers have a huge demand for titanium.
Titanium is widely used in the aviation industry, and the amount of titanium used in civil aircraft accounts for about 20-25% of the structural weight; in addition, strategic rocket engines, spacecraft (such as Shenzhou 5 and Shenzhou 6), antennas for artificial satellites, etc. also use titanium a lot.Titanium alloy wireUse in the marine industry
In seawater, titanium has corrosion resistance that other metal materials can't match, especially it can withstand the high-speed erosion and corrosion of seawater. Now, the United States, Japan, France, etc. have developed a variety of advanced titanium deep submersibles, submarines, and undersea laboratory devices for marine research. In addition, coastal power stations, offshore oil production equipment, seawater desalination, marine chemical production, and marine aquaculture are extensive.

Sexual conflict welding is the key technology for the welding of all blisks, especially all blisks of dissimilar materials, and has been successfully used in the field of foreign aero-engine manufacturing. Now, my country's aviation industry has begun to develop the linear conflict welding technology research of titanium alloy dual-function blisk. Therefore, to carry out related basic research on linear conflict welding of titanium alloy, to understand the joint temperature field, arrangement, and texture evolution process under the conditions of rapid heating, cooling and large deformation of linear conflict welding, and to characterize the mechanical function of the welded joint is one A very urgent task, which can provide theoretical basis and experimental data for the engineering production of titanium alloy dual-function blisks. This article mainly focuses on the TC4 and TC11 titanium alloys, which are important materials for making aero-engine blades and blisks, and systematically develops the linear conflict welding experiments of dissimilar titanium alloys.
High-strength titanium alloy has high strength, its tensile strength is 686-1176MPa, and its density is generally about 4.51g/cm3, which is only 60% of steel. The strength of pure titanium is close to that of ordinary steel. Some high-strength titanium The alloy exceeds the strength of many alloy structural steels. Therefore, the specific strength (strength/density) of titanium alloy is much greater than other metal structural materials, and parts and components with high unit strength, good rigidity and light weight can be produced. 2 Higher hardness. The hardness HRC of titanium alloy (annealed) is 32～38. The thermal conductivity is small and the modulus of elasticity is small. The thermal conductivity of titanium is λ=15.24W/(mK), which is about 1/4 of nickel, 1/5 of iron, and aluminum. 1/14, and the thermal conductivity of various titanium alloys is about 50% lower than that of titanium.