Method for preparing metal gradient material through selective laser melting

The invention provides a method for preparing a metal gradient material through selective laser melting. The method comprises the steps that selective laser melting is carried out on a same-componentmetal material to prepare a structural gradient material, 3D printing parameters of different partitions of a printing element are precisely controlled through a computer, structural gradient distribution of different partitions of the same-component material is realized, then the metal material with a gradient structure is integrally and quickly formed, the performance of the material is greatlyimproved, and performance requirements that a single-component metal material cannot meet are met. The method can be used for customizing microstructures of the metal gradient material according to service environments, and has high flexibility in material composition, structure, performance and appearance size control. Through reasonable structural design, material selection and process matching,a flexible intelligent man