The most widely used cast titanium alloy is Ti-6Al-4V alloy. Its casting property is best, organization, performance, stability, under 350 ℃ has good strength and fracture toughness. It can replace stainless steel for aviation and chemical industry.
Titanium castings use vacuum shell furnace and graphite type smelting. Compared with deformed alloys of the same composition, their strength is basically the same, but their plasticity and fatigue properties are about 40%~50% lower, while their fracture toughness is slightly better. Most titanium castings are treated with stabilized annealing. The solution treatment and hydrogenation treatment under study can refine the casting structure of alloy and improve its fatigue strength to the level of forgings.
Casting titanium alloy using temperature is 300 ~ 400 ℃. Usually, vacuum condensing furnace and graphite type melting casting are used. It is mainly used for casting non-rotating parts such as aircraft engine casing, supporting beam and guide blade, and also for casting rotating parts such as impeller.
It refers to the process of liquid metal forming. The molten metal is poured, injected, or sucked into the mold cavity and solidified to form a cast with certain shape and properties. Casting is characterized by one - time forming of metal with high process flexibility. The casting method includes sand mold casting and special casting, which can be selected according to the alloy type, size, batch and quality requirements of the casting. Mechanization and automation equipment can be used in mass production.
