The main semi-finished forms of TC4 titanium alloy are bars, square plates, round plates, thin plates, thick plates, profiles and wires, etc., and are also used for castings (ZTC4).
TC4ELI titanium alloy TC4ELI is an improved version of TC4, and its main difference is the different Al content and the lower content of interstitial elements Fe, N, H, and O.
TC4ELI titanium alloy has become an ideal material for medical surgical implants due to its good biocompatibility, low elastic modulus, low density, good corrosion resistance, non-toxicity, high yield strength, long fatigue life, large plasticity at room temperature, and easy forming. Medical TC4ELI titanium alloy plates are mainly used in skull repair, bone setting, etc., which have higher requirements for its strength, fatigue life, plasticity, etc.
Titanium alloy is an alloy composed of titanium and other elements. Titanium has two isomorphous forms: titanium is an isomer with a melting point of 1668℃. It has a close-packed hexagonal lattice structure below 882℃, called α-titanium; it has a body-centered cubic lattice structure above 882℃, called β-titanium. By taking advantage of the different characteristics of the above two structures of titanium, appropriate alloying elements are added to gradually change its phase transition temperature and component content to obtain titanium alloys with different structures.
TC4 ELI titanium alloy reduces the content of interstitial elements C, O, N and impurity element Fe on the basis of TC4 alloy, and its strength is reduced, but its toughness can be significantly improved. TC4 ELI has good plasticity, toughness, good welding performance and low-temperature performance, and is widely used in important fields such as cryogenic engineering, medical treatment, ships and aircraft.
TC4 alloy can be used in ordinary environment or high temperature environment, TC4ELI alloy can be used in ultra-low temperature environment
TC4 titanium alloy and TC4ELI titanium alloy have similar grades: T-6A-4V/Grade 5 (US grade), BT6 (Russian grade), IMI318 (British grade), TiAI6V4 (German grade).
Medical equipment manufacturing uses titanium and titanium alloys to manufacture artificial joints, bone plates and screws for bone and joint injuries caused by trauma and tumors in the human body, which are now widely used in clinical practice. It is also used in hip joints (including femoral heads), knee joints, elbow joints, metacarpophalangeal joints, interphalangeal joints, mandibles, artificial vertebrae (spinal orthotics), pacemaker shells, artificial hearts (heart valves), artificial dental implants, titanium-nickel dental orthodontics, and titanium mesh in skull plastic surgery.
Titanium and titanium alloys are gaining increasing attention due to their high specific strength, biocompatibility and good resistance to body fluid corrosion.
Ti 6Al-4V ELI is a grade of Ti 6Al-4V with smaller interstitial space, which can achieve maximum toughness and is suitable for seawater and low temperature environments. This grade of alloy is usually used in the annealed state. Ti 6Al-4V is a good choice of material in the field of medical implants.
The production process is: 1-4 hours of stress annealing at 900-120 degrees Fahrenheit, air cooling. Double annealing, round bars and forgings are processed by solution annealing at the beta transition temperature of 50-100 degrees Fahrenheit, holding for at least 1 hour, then air cooling, then reheating at 1300-1400 degrees Fahrenheit, holding for at least 1 hour, then air cooling. Stress annealing is suitable for after welding.
