Alumina ceramics is a dual-phase alloy with good comprehensive properties, good structure stability, good toughness, plasticity and high-temperature deformation properties, can perform hot pressure processing well, can be quenched and aging to strengthen the alloy. The strength after heat treatment is about 50%-100% higher than the annealed state; the high-temperature strength is high, and it can work for a long time at a temperature of 400℃~500℃, and its thermal stability is inferior to that of α titanium alloy.
The most commonly used of the three titanium alloys are α titanium alloy and α + β titanium alloy; α titanium alloy has the best machinability, followed by α + β titanium alloy, and β titanium alloy is the worst. The alpha titanium alloy code is TA, the beta titanium alloy code is TB, and the alpha + beta titanium alloy code is TC.
Ceramic alloys can be divided into heat-resistant alloys, high-strength alloys, corrosion-resistant alloys (titanium-molybdenum, titanium-palladium alloys, etc.), low-temperature alloys, and special functional alloys (titanium-iron hydrogen storage materials and titanium-nickel memory alloys), etc. .
Heat treatment: Titanium alloys can obtain different phase Industrial Machinable Glass compositions and structures by adjusting the heat treatment process. It is generally believed that the small equiaxed structure has better plasticity, thermal stability and fatigue strength; the needle-like structure has higher endurance strength, creep strength and fracture toughness; the equiaxed and needle-like mixed structure has better comprehensive properties. Titanium alloy has high strength, low density, good mechanical Industrial Machinable Glass properties, toughness and corrosion resistance. In addition, titanium alloys have poor process performance and are difficult to cut. In hot processing, it is very easy to absorb impurities such as hydrogen, oxygen, nitrogen, and carbon. There is also poor abrasion resistance and complex production processes. Industrial production of titanium began in 1948. The development of the aviation industry requires the titanium industry to develop at an average annual growth rate of about 8%. The world's annual output of titanium alloy processing materials has reached more than 40,000 tons, with nearly 30 titanium alloy grades. The most widely used titanium alloys are Ti-6Al-4V (TC4), Ti-5Al-2.5Sn (TA7) and industrial pure titanium (TA1, TA2 and TA3).
Titanium alloy is mainly used for the Industrial Machinable Glass production of aircraft engine compressor components, followed by the structural parts of rockets, missiles and high-speed aircraft. In the mid-1960s, titanium and its alloys have been used in general industry to make electrodes in the electrolysis industry, condensers in power stations, heaters for petroleum refining and seawater desalination, and environmental pollution control devices. Titanium and its alloys have become a kind of corrosion-resistant structural materials. In addition, it is also used in the production of hydrogen storage materials and shape memory alloys.
China began research on titanium and titanium alloys in 1956; in the mid-1960s, industrialized production of titanium materials began and developed into TB2 alloys.
Are there ceramic alloys?
2021 09/08