Today, let's take a look at a very hot metal material in the new era titanium

With the advent of globalization and information age, some traditional materials seem to have been unable to take up the most cutting-edge manufacturing tasks in some high-end fields, so the continuous birth of new materials has become a necessary condition for the development of science and technology. So today, let's take a look at a very hot metal material in the new era titanium.

In fact, we may not know about titanium alloy, but we must be familiar with it. For example, we all deserve to have the "titanium dog eye" this thing, we must have heard of, but usually we only know how to play the terrier, do not know how this is going on. It actually comes from the popular RPG game of the whole Internet bar - "world of Warcraft".

The word is derived from the hardened krypton gold dog eye and Titan fine steel dog eye in world of Warcraft. Hardened krypton gold and Titan refined steel are rare in the game, and the selling price is relatively high, and many excellent equipment will be made of this material. Therefore, it can be imagined that titanium alloy is a very top-notch material. Next, let's talk about the material representing the God player.

Titanium alloy, a metal material developed in the 1950s, quickly replaced the traditional steel and became an indispensable material in many frontier fields. Because of its more perfect characteristics than steel, it has become an indispensable existence in aerospace, navigation, information transmission and other aspects.

High thermal strength

The service temperature of these two kinds of titanium alloys is several times higher than that of aluminum alloy. It can still maintain the required strength at medium temperature, and can work at 450-500 ℃ for a long time. These two kinds of titanium alloys still have high specific strength in the range of 150 ℃ - 500 ℃, while the specific strength of aluminum alloy decreases significantly at 150 ℃. The working temperature of titanium alloy can reach 500 ℃, while that of aluminum alloy is below 200 ℃.

High strength

The density of titanium alloy is about 4.51g/cm3, which is only 60% of that of steel. The density of pure titanium is close to that of ordinary steel. Some high strength titanium alloys exceed the strength of many alloy structural steels. Therefore, the specific strength (strength / density) of titanium alloy is far greater than that of other metal structural materials. Refer to the chart for specific data, and parts with high unit strength, good rigidity and light weight can be made. Titanium alloy is used in engine components, frame, skin, fastener and landing gear of aircraft.

Good corrosion resistance

The results show that the corrosion resistance of titanium alloy is much better than that of stainless steel when it is working in humid atmosphere and sea water medium; the resistance to pitting corrosion, acid corrosion and stress corrosion is particularly strong; it has excellent corrosion resistance to alkali, chloride, chlorine organic substances, nitric acid, sulfuric acid, etc. However, titanium has poor corrosion resistance to reducing oxygen and chromate media.

Good low temperature performance

The mechanical properties of titanium alloy can be maintained at low and ultra-low temperature. Titanium alloys with good low temperature properties and very low interstitial elements, such as TA7, can maintain a certain plasticity at - 253 ℃. Therefore, titanium alloy is also an important low temperature structural material.

In addition, titanium alloy has high chemical activity, low thermal conductivity and elasticity. It can be seen that titanium alloy is very important. Take the field of military navigation as an example, and aircraft carrier can be said to be an important indicator in this respect. We often say that many countries can afford to build an aircraft carrier but can not afford to support it. It has been reported that a rivet on the deck of an aircraft carrier can be replaced by a car. This kind of rivet is not a common rivet. It is made of titanium alloy