СПОСОБ ВОССТАНОВЛЕНИЯ ПОВЕРХНОСТИ МОНОКРИСТАЛЛИЧЕСКОЙ ДЕТАЛИ, ПОЛУЧЕННОЙ НАПРАВЛЕННОЙ КРИСТАЛЛИЗАЦИЕЙ

摘要

The recharging of a metal component, that is monocrystalline or has a directed solidification with a thickness (W s) of less than 2 mm, consists of applying a laser beam and a flux of metal powder, with the same nature as the metal component, on the component in order to fabricate at least one layer of metal. The laser beam is emitted at a given power (P) and is displaced along the component at a given speed (V). The laser beam and the flux of powder are applied in a coaxial manner on the component and the ratio of the power to the speed of displacement (P/V) is within a defined range shown on a graph of P/V against W s. Laser beam and the metal powder are applied by a projection nozzle incorporating a truncated section portion with a central boring for the passage of the laser beam and some channels extending in the wall of the truncated section for the supply of the metal powder.