Titanium alloy has the highest tensile plasticity and can be welded in various ways. The long-term use temperature can reach up to 250 degrees Celsius. It is mainly used to manufacture various low-strength Bancun structural parts on aircraft and engines. Industrial pure titanium has good plasticity, can form various sheet stampings in the cold state, and has high corrosion resistance. The Ti5Al2.5Sn titanium alloy has a moderate room temperature tensile strength (800 ℃ 1000 MPa and good welding performance. Compared with the pure industry titanium, the new titanium alloy mainly includes various different grades of industry pure titanium and widely used Ti5Al2.5Sn Titanium alloy, industrial pure titanium room temperature tensile strength fluctuates in the range of 350 ℃ 700MPa. Ti5Al2.5Sn alloy process plasticity is slightly lower, and the thermal strength is higher, long-term working temperature can be as high as 450 ℃.
With the rapid development of cutting-edge science and technology such as aviation, aerospace, nuclear energy, etc., the requirements for materials are becoming more and more stringent. Not only are the materials used to manufacture equipment parts in these aspects resistant to corrosion, wear, and micro-vibration, but also require high resistance. temperature. It is necessary to pay attention to the long-term test. In many places, before the large-scale application of titanium in the chemical industry. Under the test conditions, cooperate to check its service life and material structure. If most of the conventional structural data shows that the lack of safety (immature) results in little economic benefit, then firstly titanium and its alloys must be gradually developed, and high-level technology has been developed in the field of structural data in recent decades Mature other new materials. Therefore, the military sector has developed faster than the civilian sector in the application of titanium and its alloys.
In many industrial media, the rare earth metals and precious metals that are mainly used are stable, or the corrosion resistance of materials such as stainless steel can only reach a certain limit. Most applications use titanium to gain benefits because of its low density, corrosion resistance and strength. So far. And the cost of consumption is relatively high, so the use of titanium or titanium alloys can obtain higher corrosion resistance. The creep characteristics of hard titanium when it exceeds 150T exceed that of aluminum and its alloys. Considering that compared with other materials, titanium alloys have unique creep characteristics under low density conditions, and they have found the advantages of hard titanium in aircraft manufacturing and missile manufacturing. The importance of application. The earliest application of titanium and titanium alloys was in the aerospace industry. Recently, the aerospace industry is increasingly in need of high-strength and low-density materials, which has greatly promoted the development of the titanium manufacturing industry. In the early 1950s, the United States successfully applied titanium on airplanes. At that time, although an E-machine only used 1% of the structural weight of titanium, it pioneered the pioneering way of using titanium in the aviation industry. At present, titanium alloys are widely used as structural materials in many high-speed aircrafts in the world. We are a large titanium industry. The processing output of titanium rods accounts for 21.4% of the world's output. The mid-range products of titanium rods and titanium alloy rods can be freely produced in my country, but we still do not have the production capacity in the high-end field. my country's sponge titanium production ranks first in the world, accounting for about 30% of world production. The demand for titanium rod and titanium alloy rod processing materials is in the recovery stage in the past two years, but it is strongly optimistic about the medium and long-term development, especially in the fields of aerospace, marine and power.
1. Aerospace field
Worldwide, 50% of titanium rods and titanium alloy rods are used in the aerospace field. The United States and Russia each account for more than 50%, while my country has less than 20%, and there is a lot of room for the future. In the second half of the year, the Airbus A380 and Boeing 787 test flights were pushed back for a year and a half to 2014. It is expected that these two types of aircraft will be mass-produced in 2015, which will drive the demand for titanium rods and TA1 titanium rods for aviation in the world. In the future, large aircraft will replace branch lines, and wide bodies will replace narrow bodies. The consumption of Airbus 380 titanium rods and titanium alloy rods is 90 tons/frame, and Boeing 787 is 100 tons/frame. From 2004 to 2020, the US fourth-generation fighters will replace the third-generation fighters. The proportion of the fourth-generation fighters F-22 titanium rods and titanium alloy rods is 40%, while the proportion of titanium used in the third-generation aircrafts such as Su-27 and F-15 is only 17%. China's large aircraft, space station, and Chang'e plan will use a large number of titanium rods and titanium alloy rods. Especially large aircraft projects will be implemented in the next few years, and the application of titanium rods will gradually increase.
2. Power sector
China's nuclear power plan, nuclear power generation in 2020 will account for 4% of total power generation, currently only accounts for 1%, which means that 3-4 million-kilowatt nuclear power plants will be added each year. Nuclear power plant condensers require "all-titanium". The import of welded titanium tubes for nuclear power was 1800-2000 tons in 2007, and reached 3322 tons in 2008. The demand in the next few years will increase year by year.
3. Chemical and metallurgy
The chemical and metallurgical field is the largest field of application of titanium rods and TC4 titanium rods. Titanium for chemical and metallurgy will not decay for a long time, and will gradually pick up as the economy recovers.
4. Automotive equipment
Titanium will gradually increase with the increase of domestically produced automobiles, and 6% of titanium rods and titanium alloy rods are used in automobile manufacturing in Japan.
5. New application areas
Recently, there has been rapid growth. For example, artificial implant materials consume 3 million pieces per year in the United States and only 200,000 pieces in China.
6. Marine field
Titanium for ships. my country's future construction of submarines (submarine-to-sea system) and aircraft carriers (10,000 tons/ship) will use a large number of titanium rods. Seawater desalination. Seawater desalination technology using titanium as a material has been fully developed in Japan and the Arab region. Compared with the South-to-North Water Diversion Project, seawater desalination is more economical. Relevant technologies in the Bohai Rim region have been well-prepared, waiting for opportunities for large-scale desalination projects in the future. Offshore oil extraction. This aspect is relatively mature in the United States, and future oil exploration in the deep sea will become a trend.
7. Civilian fields
With the in-depth development of titanium materials, in the field of civil environmental protection, leisure and health, the application ratio continues to increase.