Casting titanium and titanium alloy

Traditional lost wax casting technology in the production of titanium prosthesis is not easy to succeed, because ti is very lively, high temperature easily and the atmosphere or package elements buried in feeding response. Therefore, titanium casting requires a special heat source model, special materials and prevent the titanium surface pollution equipment. Special dental dissolved atmosphere titanium casting: vacuum and inert gas protection law. Inert gas is argon and helium. Fusionmethods are: high frequency induction method and arc melting method. Casting methods: differential pressure casting, pressure casting and centrifugal casting method. Medical | education network collected differential pressure casting method is the metal melting chamber and the chamber pressure difference casting titanium and titanium alloy cast into the mold cavity. Pressure casting method is the protection ofinert gas at low pressure of melting titanium material, when the melted liquid titanium and titanium alloy to cast crossing, to be higher on the surface of titanium and titanium alloy liquid pressure, the liquid titanium cast into the mold cavity. In addition, the use of cast titanium metal crucible, crucible and high density graphite crucible. Metal crucible for copper crucible, and the use of arc melting method. Titanium casting forembedding material titanium casting. Also note that in the titanium casting process:casting thickness should not be less than 0.7cm, the exhaust channel setting, spruesetting, mould form, mold baking roasting temperature and casting mold temperature,mold cooling, the casting surface treatment method of different with cobalt chromium,nickel base alloy. Titanium in molten state is very lively, has long been unable to findsuitable and other material casting method, the cast titanium behind wrought titanium alloy 20 years. From 1956 to 1962 American Baer (Beal), developed by vacuum consumable arc melting technology of the Titanium Castings Solidification, officially entered the industrial production. In twentieth Century 70, began to be used in the field of Aeronautics and astronautics. From 70 time later, titanium alloy large thin-walled precision casting technology development and application. Based on thematerial performance is equal or close to the aviation titanium forgings, the cost is reduced by about 50%, and titanium casting technology has been rapid development.Expected in the near future, it will obtain the position and deformation of titanium alloyare equally important. Casting process and equipment of vacuum consumable arc skull furnace is the main equipment for production of titanium castings, the principle is:in the furnace body, using titanium material cast or forged bar as the parent material electrode (anode), water-cooled copper crucible as a positive electrode, under vacuum atmosphere, low input voltage (25 ~ 40V) of high current, the poles near thearc, melting titanium material consumable electrode tip, drop into the crucible, the formation of molten pool. In the cooling effect, a layer of shell forming copper cruciblewall and the crucible melt pool, protection against erosion, titanium liquid without pollution. When the weld pool growth crucible to suffici

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