Method for rapidly preparing laser cladding functional gradient coating and obtained coating

The invention belongs to the technical field of laser cladding coatings, and particularly relates to a method for rapidly preparing a laser cladding functional gradient coating and the obtained coating, and the method comprises the following steps: (1) premixing a ceramic particle component and first alloy powder; (2) the obtained premixed powder and second alloy powder are fed to the surface of a base body according to the respective powder feeding speed, meanwhile, laser cladding is conducted on the powder on the surface of the base body, and a bottom layer, a transition layer and a functional layer are formed on the surface of the base body in sequence; the corresponding premixed powder feeding rates of all the layers are marked as X1, X2 and X3 respectively, the second alloy powder feeding rates are marked as Y1, Y2 and Y3 respectively, X2 = a * (X1 + (X3-X1)/2), Y2 = b * (Y1 + (Y3-Y1)/2), a = 0.6-1.0, and b = 1.0-1.2. According to the invention, the internal stress of each layer is reduced, the interface