Titanium alloys are considered the most ideal light-weight structural materials in strategic fields such as space, sea, and so on, because of their high specific strength, strong corrosion-resistance, and non-magnetic properties. However, there are still some worldwide problems such as high energy consumption and high cost in manufacturing titanium alloy and its components by using ingot metallurgy technology.
Research shows that crucible vacuum induction melting is one of the effective ways to solve the above problems, but the high chemical activity of titanium makes it react with almost all known refractories. Therefore, the new titanium crucible material and its preparation technology are the keys to realizing the low cost, high quality, and high-efficiency melting of titanium alloy.
In this regard, some key points are summarized on the research status of ceramic crucible materials (corrosion resistance mechanism, ingredient optimization) and crucible durability for induction smelting of titanium alloy at home and abroad. Combining with the recent research progress of Huazhong University of Science and Technology, new thoughts are put forward on its future development direction, you can search for them.
Stability of refractories in Ti-Al binary alloy system at different temperatures. (a) 1873 K; (b) 2073 K; (c) 2273 K
Schematic diagram of physical infiltration behavior of melt during induction melting
Interface analysis between AlN ceramics and TC4 alloy. (a) SEM image with macroscopic morphology illustrated; (b) Energy Dispersion Spectrometer (EDS) line sweep
Y2O3/ZrO2 composite ceramic crucible. (a) Macro photo of the crucible; (b) Microstructure of TiAl alloy prepared by composite ceramic crucible (c) Surface morphology of the coating
