2019年12月23日星期一

Processing characteristics of titanium

In addition to pure titanium, nearly 30 kinds of titanium alloys have been produced in the world. The most widely used titanium alloys are Ti-6Al-4V, Ti-5Al-2.5Sn, etc. The industrial method for the production of titanium metal is the Klauer method, and the product is sponge titanium. The traditional process for preparing titanium material is to melt-cast titanium sponge into an ingot and then process it into titanium material. According to this, the main steps of the process from mining to making titanium are:
Titanium ore-> Mining-> Beneficiation-> Tai concentrate-> Enrichment-> Titanium-rich material-> Chlorination-> Coarse TiCl4-> Refining-> Pure TiCl4-> Magnesium reduction-> Sponge titanium-> Melting-> Titanium ingot-> processing-> titanium material or titanium component If the rutile is obtained in the above steps, it does not need to be enriched, and it can be directly chlorinated to obtain crude TiCI4. In addition, the casting operation should be a metallurgical process, but sometimes it is also classified as a processing process.
的 The processing in the above process refers to plastic processing and casting. Plastic processing methods include forging, extrusion, rolling, stretching and so on. It can process titanium ingots into various sizes of cakes, rings, plates (titanium plates), pipes, rods, profiles, and other products. It can also be made into parts and components of various shapes by casting.
Titanium and titanium alloy plastic processing have large deformation resistance; poor plasticity at room temperature, high yield limit and strength limit ratio, large spring back, sensitive to notches, easy to adhere to the mold during deformation, and easy to absorb harmful gases when heated. Plastic processing is more difficult than steel and copper.
Therefore, the processing technology of titanium and titanium alloys must consider these characteristics.
Titanium is plastically processed, the size of soil is not limited, and it can be produced in large quantities, but the yield is low, and a large amount of waste residue is generated during processing.
In view of the above disadvantages of titanium plastic processing, a powder metallurgy process of titanium has been developed in recent years. The powder metallurgy process of titanium is the same as ordinary powder metallurgy, except that sintering must be performed under vacuum. It is suitable for producing large quantities and small size parts and is especially suitable for producing complex parts. This method requires almost no further processing and has a high yield. It can make full use of titanium waste as raw materials and reduce production costs, but it cannot produce large-sized titanium pieces. The powder metallurgy process flow of titanium is: titanium powder (or titanium alloy powder)-> sieving-> mixing-> press forming-> sintering-> auxiliary processing-> titanium products.
cp titanium wire     titanium spool wire     grade 7 titanium alloy sheet     titanium welding wire   

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