Pages 525-526
The fabrication of Ni-Ti shape memory alloy precision screws using by the heading and form rolling have been investigated. The workability of the shape memory alloy is extremely poor and the dimensions of the processed product become larger after processing due to the shape recovery effect. The shape memory alloy has two characteristic properties, a shape memory effect and a superelastic effect. Therefore it is expected to be applied in medical, mechanical and electric fields as a wire and in the formation of precision screws. In this study, in particular, the processing limit during heading and the improvement of the dimensional precision of the threads were examined in the detail. Since light weight and small size are in demand for recent products, the prospect of realizing fabrication technology for the precision micro-screws is discussed.
