Method of laser-electron beam composite additive manufacturing and system thereof

A laser-electron beam composite additive manufacturing method, comprising:

• melting metal powder by using an electron beam as a heat source to form a molten pool on a surface of a substrate;
• acquiring three metrics comprising temperature, morphology and depth, and surface defects of the molten pool in real time;
• when the three metrics simultaneously satisfy preset conditions, switching to using a laser as a main heat source and the electron beam as an auxiliary heat source;
• and continuing to melt the metal powder until a deposition is formed;
• wherein,
• during a collaborative operation process of the laser and the electron beam, constructing an energy distribution map based on multiple detection data to obtain temperature and morphology distributions of the molten pool;
• and adjusting a power and a focal length of the laser as well as a power and a morphology of the electron beam in real time based on variations in the temperature and morphology of the molten pool;
• wherein, the preset conditions comprise:
• the temperature of the molten pool reaches a set stable temperature range, surface fluctuations of the molten pool decrease to a set standard range, and a defect occurrence rate is lower than a set threshold.