Memory alloy is widely used. For example, mechanical fastening pin, pipe joint, fire alarm on electronic equipment, plug-in parts, soldering of integrated circuit, artificial heart valve, spine straightening rod, skull repair and reshaping, oral tooth correction and jaw repair operation. It will also play a magic role in communication satellites, color TV sets, temperature controllers and toys. It will also become a new type of material memory alloy in modern navigation, aviation, aerospace, transportation, light textile and other fronts, which has been used in pipeline combination and automatic control. The sleeve made of memory alloy can replace welding. The method is to complete the tube end at low temperature The expansion is about? 4%. When assembling, the sleeve is jacketed together. Once heated, the sleeve shrinks back to its original shape, forming a tight joint.

The application of memory alloy in medical treatment is also very attractive.

For example, the bone plate used for bone grafting can not only fix the two broken bones, but also produce compression force in the process of restoring the original shape, forcing the broken bones to join together. Tooth straightening wire for dentistry, long clip for ligation of cerebral aneurysm and vas deferens, and support plate for spine straightening are all started by body temperature after being implanted into human body. Thrombus filter is also a new product of memory alloy. After the straightened filter is implanted into the vein, it will gradually return to the network, thus preventing? 95% of the clots from flowing to the heart and lungs.