1results about How to "Improve isotropic performance" patented technology

The application relates to the technical field of metal additive manufacturing, in particular to an SLM additive manufacturing method and system based on ultrafast laser in-situ assistance and application, which comprises the following steps: a three-dimensional model of a part to be formed is established and slice processing is carried out to generate a scanning path of a main laser; an ultrafast laser is coaxially combined with the main laser, and working parameters of the main laser and the ultrafast laser are set; a layer of metal powder is laid in a forming area, the main laser scans and melts the metal powder according to the scanning path to form a molten pool, and the ultrafast laser acts on the tail of the molten pool or the solidification front of the point after the main laser scans the point at a preset time interval; layer-by-layer processing is carried out until the whole part is manufactured. The ultrafast laser is coaxially integrated with the main laser, and in a preset time interval after the main laser scans a point to melt the metal powder and form a molten pool, the ultrafast laser is used to impact and inject energy into the tail of the molten pool or the solidification front which is advancing, so that grain refinement, defect elimination and stress regulation can be realized, and high-performance metal parts with small and uniform microstructure, few internal defects, low residual stress, excellent mechanical properties and significantly improved isotropy can be prepared.