Titanium powder

What kind of substance is titanium powder? What are its chemical composition and physical properties? What are its application fields? Let's learn about titanium powder together.
Titanium powder is a metal powder made of titanium. It is a silver-gray irregular powder and is commonly used in aerospace, spraying, metallurgy, fireworks and other industries.

Titanium powder is also hidden in our daily lives. For example: During the holidays, we see fireworks and firecrackers blooming in various colors, and the main material of the colorful colors is titanium powder. Of course, this is just the least noteworthy use.

fireworks

Titanium powder (hydrogenated) is a black-gray irregular powder.

Titanium powder has a wide range of uses, mainly including the following aspects:

Titanium powder and titanium hydride powder are metal powders with a wide range of uses. It is an additive for powder metallurgy and alloy materials. It is also an important raw material for cermets, surface coating agents, aluminum alloy additives, electric vacuum getters, spraying and plating. Titanium powder is used to make a variety of components, including critical structural components, firewalls, landing gear, exhaust pipes and hydraulic systems. Also used in aerospace, spraying, metallurgy, fireworks and other industries.

The main parameters are: particle size (mesh number), titanium content, hydrogen content, tap density, etc.

Titanium powder properties:
1.Chemical composition
It mainly refers to the content of titanium metal and the content of impurities. The higher the titanium content in titanium powder, the lower the impurity content, the higher the purity and the higher the grade of titanium powder. High-quality titanium powder often has the lowest oxygen content, so the quality of titanium powder often depends on the oxygen content in it.
2.Physical properties
Titanium powder is more active than metallic titanium and is more likely to react with other elements or compounds. It is more easily oxidized, flammable, and explosive, and is a dangerous product. Therefore, titanium powder packaging has special requirements. When packaging titanium powder, vacuum packaging must be used. The outer packaging is protected by inert gas argon and the outer packaging uses an explosion-proof barrel.
Manufacturing of titanium powder
There are many methods for producing titanium powder, including mechanical alloying, hydrodehydrogenation (HDH), atomization, metal thermal reduction and molten salt electrolysis.
At present, the most commonly used method in China is hydrogenation dehydrogenation (HDH). Hydrodehydrogenation is a process that utilizes the reversible properties of titanium and hydrogen to prepare titanium powder. The HDH method uses sponge titanium to become brittle after absorbing hydrogen and is easily crushed mechanically to produce titanium hydride powder, which is then dehydrogenated at high temperature under vacuum conditions to produce pure titanium powder.
Titanium powder production process
1 Using a horizontal hydrogenation furnace, the hydrogenation reaction occurs when the temperature is raised to above 350°C under positive hydrogen pressure. When the temperature is raised again, the reaction begins to be violent, and a large amount of hydrogen is absorbed quickly. The hydrogen is passed through and kept for 3 hours, and then in a hydrogen atmosphere. After slowly cooling to room temperature, titanium hydride powder with a hydrogen content of 3.8%±0.2% can be obtained.
2. Perform ball milling under the protection of protective gas, which can effectively prevent titanium powder from being contaminated and avoid the occurrence of natural titanium hydride, ensuring the safety of production.
3.Titanium hydride with different particle sizes can be obtained by ball milling. Put the ground titanium hydride into the furnace for dehydrogenation reaction. Under vacuum conditions, the temperature rises to above 680°C. At this time, the titanium hydride quickly decomposes and releases hydrogen. The entire dehydrogenation process maintains a low vacuum degree and continues About 19h, the titanium powder was finally obtained.
4. Classify titanium powder of different particle sizes through screens (screening systems) with different mesh sizes.