Method and device for laser direct manufacturing for metal-matrix composite structural part

The invention provides a method for laser direct manufacturing for a metal-matrix composite structural part. The method comprises the following steps: step 1, generating a CAD model of the part on a computer, carrying out slicing treatment on the CAD model, and discretizing the complex three-dimensional part into a series of two-dimensional plane figures to obtain a scanning track instruction; step 2, starting to feed a metal powder through a powder feeding device keeping coaxial with a laser beam; step 3, turning on a high-power laser, and melting the metal powder through the laser beam; step 4, feeding a ceramic powder into a molten bath formed by the laser from the rear of the molten bath through a paraxial powder feeding system; and step 5, starting second-layer surface scanning until manufacturing for the whole part is completed. The invention further provides a corresponding device. The method and the device, which are provided by the invention, are capable of directly manufacturing the precise and complex metal-matrix composite structural part.