Nickel titanium alloy is the most important and most widely used in shape memory metal alloy, because of its unique memory recovery features, super elasticity, fatigue resistance, and biocompatibility, so it has been applied to cruise too, the people's livelihood, medical and other industries. Is nickel titanium alloy of nickel and titanium in about 50% of the proportion, according to the proportion of alloy, forming process and the heat engine process control, can be adjusted according to different applications to phase transition temperature and mechanical properties of alloy.
In response to the global trend of minimally invasive surgery and make up domestic high-end metal materials gap of medical industry, the technology research and development of medical grade nickel titanium alloy technology, containing alloy design, melting, hot forming, cold rooms of pumping line, engine processing, surface modification and the final product test verification technology, based on the preliminary alloy raw materials into the key technology and the commercialization of mechanism in the end.
Shape memory alloy consists of nickel - titanium base, copper base and iron base, because of the nickel - titanium base in addition to have a better and stable characteristics, more better fatigue resistance, biocompatibility, so for now the most important and most widely used alloy.
Nickel titanium alloy (Nitinol) production process is shown in figure 2, for the vacuum smelting technology will be nearly 50% weight ratio of nickel and titanium melting, succeeded in line/smoking pipe technology for the manufacture of different sizes, nickel titanium tube/line/profile, to adjust the material mechanical properties and heat engine processing temperature range of memory. If the memory processing program is implemented again, it can be restored to the shape of memory at a certain temperature or above.
For nickel titanium alloy has a unique super elasticity and shape memory properties, is widely used to cruise too, electronics and general consumer goods, the other biomedical materials because of its approved by the FDA, in recent years in the application of the rapid increase of medical industry, especially in dental and orthopedic and minimally invasive surgical instruments related to the application.
Nickel titanium alloy materials for the high additional value, melting materials of nickel and titanium into alloy type, the value can be improved about 13 times, when applied to the field of medical equipment, value can be increased to 4 to more than 90 times.
