Selective laser melting machining method and application of high-nickel-rich NiTi alloy

The invention provides a selective laser melting machining method and application of a high-nickel-rich NiTi alloy. The machining method comprises the steps that: (1) NiTi alloy powder is preset to form a to-be-treated layer, in the NiTi alloy powder, the atomic percent of the Ni element is 53-57%, and the balance is Ti atoms; (2) laser melting treatment on the to-be-treated layer is performed according to printing process parameters to form a target layer; and (3) the step (1) to the step (2) are executed repeatedly, so that an NiTi alloy part is formed; and in the laser melting treatment, the laser power is 80-150 W, the laser scanning speed is 150-450 mm/s, and the laser scanning interval is 30-120 mu m. According to the machining method, selective laser melting machining can be performed with the NiTi alloy powder with the high nickel content as an object; the precision of a machined part can be guaranteed; and the machined part can have excellent performance in the mechanical property aspect. 本发明提供一种高富镍N