Method capable of giving consideration to laser melt injection efficiency, composite layer depth and metallurgical quality

Abstract

The invention belongs to the field of laser advanced manufacturing, and discloses a method capable of giving consideration to laser melt injection efficiency, composite layer depth and metallurgical quality. According to the method, a molten pool is formed on the surface of a metal base material through a laser beam, and meanwhile, a substrate is subjected to synchronous preheating through an induction coil; and then, ceramic reinforced particles are poured into the molten pool, the reinforced particles which are not completely molten are caught in the molten pool, and accordingly, and a particle-reinforced metal ceramic composite layer is formed on the surface of the metal base material. Induction preheating is synchronously introduced into the traditional laser melt injection technologytreatment process, the cooling rate of the molten pool can be properly decreased, nucleation of the brittle metal compound in the molten pool is inhibited, the problem that cracking occurs due to thefact that the precipitation amount of the brittle compound in the traditional metal ceramic composite layer laser melt injection process is too large is solved, and the intensity of interfacial reaction is effectively controlled while the laser melt injection efficiency and the composite layer depth are remarkably improved.

Description

technical field [0001] The invention belongs to the field of advanced laser manufacturing, and more specifically relates to a method that takes into account the laser melting efficiency, composite layer depth and metallurgical quality, and can suppress the precipitation of brittle compounds in the laser melting metal-ceramic composite layer. Background technique [0002] Laser melting injection technology was invented by Ayers et al. of the U.S. Naval Laboratory in 1981. Its principle is to use laser beams to form a molten pool on the surface of metal materials, and at the same time inject reinforcing particles directly into the molten pool. During the subsequent cooling process, The injected particles are too late to melt and are "frozen" in the molten pool to form a particle-reinforced metal-ceramic composite layer. Compared with laser cladding technology, the main heating object of laser melting injection technology is the substrate, and the reinforcing particles can be d...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiency that the existing laser melting injection of metal-ceramic composite layer cannot take into account the melting efficiency, layer depth and metallurgical quality of the composite layer, the purpose of the present invention is to provide a method that takes into account the laser melting efficiency, composite layer depth and metallurgical quality. It can significantly improve the laser melting efficiency and layer depth, and can also inhibit the precipitation of brittle compounds in the laser melting metal-ceramic composite layer

In the traditional laser melting process, this method introduces an induction coil to preheat the metal substrate synchronously (that is, while using a laser beam to form a molten pool on the surface of the metal substrate, an induction coil is used to synchronously preheat the substrate). Reasonable matching with the induction energy can not only significantly improve the laser melting efficiency and composite layer depth, but also solve the problem of cracking caused by excessive precipitation of brittle compounds under rapid solidification conditions in the process of traditional laser melting metal-ceramic composite layers, and inhibit Precipitation of brittle compounds in the laser melting composite layer, while effectively controlling the intensity of the interface reaction

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