Titanium is an important structural metal in the 1950s developed, because having a high specific strength titanium alloy, corrosion resistance, and high heat resistance, is widely used in various fields. Many countries recognize the importance of shovel alloys in the world, have their research and development, and has been applied.
Titanium is the first practical United States in 1954 successfully developed Ti-6Al-4V alloy, because of its heat resistance, strength, ductility, toughness, formability, weldability, corrosion resistance and biocompatibility are better, and become the ace of titanium alloy industry, which accounts for the use of an alloy of 75% to 85% of all titanium alloys. Many others can be seen as a modification of titanium alloy Ti-6Al-4V alloy.
1950s and 1960s, mainly the development of high-temperature titanium and titanium alloy airframe aviation engine, the 1970s developed a number of corrosion resistant alloys, since the 1980s, corrosion resistant titanium and high-strength titanium alloy has been further development of. Temperature resistant titanium alloys 400 ℃ from the 1950s up to the 1990s 600 ~ 650 ℃. Appears A2 (Ti3Al) and r (TiAl) based alloys, titanium engine parts being propelled by an engine using cold end (fan and compressor) to the hot end of the engine (turbo) direction. Structural titanium alloy development to high-strength, high plastic, high strength and high toughness, high modulus and high damage tolerance direction.
In addition, since the 1970s, there was Ti-Ni, Ti-Ni-Fe, Ti-Ni-Nb shape memory alloys, etc., and get increasingly widely used in engineering.
Currently, the world has been developed hundreds of titanium, most notably 20 to 30 kinds of alloys, such as Ti-6Al-4V, Ti-5Al-2.5Sn, Ti-2Al-2.5Zr, Ti-32Mo, Ti-Mo-Ni, Ti-Pd, SP-700, Ti-6242, Ti-1023, Ti-10-5-3, Ti-1023, BT9, BT20, IMI829, IMI834 et [2'4].
Titanium can be divided between α, α + β, β-type titanium alloy and aluminum metal compound (TixAl, where x = 1) four categories.
没有评论:
发表评论