Since the 21st century, with the rapid development of high-speed trains and aerospace technology, high-strength aluminum alloy components have gradually developed in the direction of large-scale, integration and complexity. The traditional aluminum alloy preparation method has some problems, such as long processing cycle, high cost and easy defects. As a kind of additive manufacturing process, laser melting deposition technology has the advantages of short preparation period, low cost and high forming quality, and has become one of the important means for the preparation of high-strength aluminum alloy components. The traditional laser melting deposition technology uses laser beam to form a molten pool on the surface of the matrix, and the powder enters the molten pool and is heated to melt. However, in the process of ultra-high speed laser melting deposition, the powder melts above the molten pool under laser heating, and only a small amount of powder melts in the molten poo Read More