Titanium plate has the characteristics of low density, high specific strength and corrosion resistance, and has great application potential in the automotive industry. The use of titanium and titanium alloys in cars can save fuel, reduce engine noise and vibration, and improve the lifespan. However, for a long time, automotive materials have been nationwide for steel, Al and other materials. In order for Ti materials to enter the automotive market, in addition to its own functional advantages, it must further reduce the cost to a level acceptable to the automotive industry. Ti titanium plate metallurgical parts for automobiles is a very promising category, but it is currently constrained by factors such as cost, and its implementation has been slow to develop. The use of leading titanium plate metallurgy skills to prepare Ti titanium plate metallurgical parts can not only greatly reduce the cost, but also help the implementation of Ti and its alloys in the automotive industry, making it a major application after the aerospace industry category. Development of low-cost titanium and its alloy titanium plates can supply low-cost materials for metallurgical parts of titanium and titanium plates for automobiles. From the perspective of existing skills, the sponge Ti powder method, hydrodehydrogenation method and metal hydride recovery method are the most suitable for the automotive industry.
One. Sponge Ti powder method. This is currently a way to meet the needs of the automotive industry for titanium plates in terms of cost. The first is to use the traditional sponge Ti and the residues in the process to crush it; the obtained titanium plates are often thicker and richer. Cl element. The Huachang company of the United States chose the gas phase method to introduce TiCl4 and Mg steam successively into the 850 ℃ tube furnace, quickly generating fine Ti powder and MgCl2, but such fine powder is difficult to separate from MgCl2, and the O content is high; Japan created a The spray reverberation method sprays gas onto the liquid Mg to generate particles in response. The test indicates that about 100 grams of Ti powder with a particle size of tens of microns can be prepared per 100 grams of Mg and 400 grams of TiCl4, and the output power has been increased by 2 times. The cost is reduced by 50%, and it is expected to be used as a material for titanium plate metallurgy Ti products.
Second. Hydrodehydrogenation. Because of the wide particle size planning and low cost of the produced titanium plate, this method is not strict with the material requirements, and the technology is relatively easy to complete. Through years of improvement and promotion, it has become the primary method for making Ti powder at home and abroad. However, the titanium plates prepared by this method tend to have high O and N contents. The Northwest China Nonferrous Metals Research Institute selected hydrodehydrogenation technology to hydrodehydrogenate ingots to prepare high-quality titanium plates with low O, N, and Cl. They have outstanding functions and can currently produce O content less than 0.20%. Titanium plate, and has completed mass production, is expected to provide stable titanium titanium plate for automotive metallurgy titanium plate metallurgical parts. Japan Toho Titanium Co., Ltd. used improved technology to prepare Ti powder with a particle size of less than 150 microns and an O content of less than 0.15%; on the basis of this research, Toho Titanium Co., Ltd. invested 1 billion yen to create a 30-ton annual hydrogen dehydrogenation method Ti powder production line.
three. Metal hydride recovery method. TiCl4 can be recovered with hydrogen at 3500°C, and TiO2 can be recovered with carbon heat above 1800°C. In order to lower the reaction temperature, the former Soviet Union scientists proposed to use CaH2 to restore TiO2 and TiCl4, which can be carried out at a temperature of 1100~1200°C. The reaction generates TiH2, and then removes H to obtain Ti powder. Because this method does not involve Cl element in the response, it is possible to obtain a titanium plate with extremely low Cl content. I heard that its cost is only one-third of the traditional hydrodehydrogenation method, and now it has the level of planned production. Although the Ti powder produced by this method has a high H content, it is reported that the presence of a small amount of H is beneficial to the sintering of the titanium plate and improves the microscopic arrangement, and can be completely removed in the subsequent vacuum sintering and annealing process.

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