Laser cladding light path system capable of realizing preheating and remelting in cladding process and working process of laser cladding light path system

Abstract

The invention provides a laser cladding light path system capable of achieving preheating and remelting in the cladding process and a working process of the laser cladding light path system. The laser cladding light path system comprises a laser cladding light path system body and a preheating and remelting light path system body. The laser cladding light path system comprises a second laser emitter, a polarization splitting prism, a plane lens and a convex lens, and the preheating and remelting light path system comprises a first laser emitter, a shutter, a beam shaper, a plane mirror, a polarization splitting prism, a plane lens and a convex lens. The laser cladding light path system is designed to be a light path system in the laser cladding head, preheating and surface pretreatment can be carried out on a coating or a base body before forming, remelting can also be carried out on a solidification forming cladding layer which is subjected to cladding, the temperature gradient is reduced, and the laser cladding efficiency is improved. The problems of cracks and structure non-uniformity caused by overlarge stress due to rapid cooling and rapid heating in cladding are effectively solved, the problem that powder adheres to the surface of a cladding layer can also be effectively solved, the air hole generation sensitivity of a lap joint area is reduced, and the powder utilization rate is increased.

Description

technical field [0001] The invention relates to the technical field of laser cladding, in particular, to a laser cladding optical path system and its working process that can realize the preheating and remelting of the cladding process. Background technique [0002] Laser cladding technology refers to using a computer to control the movement of the laser head according to the designed three-dimensional model, melting the alloy powder through laser radiation, and solidifying it layer by layer to form three-dimensional parts with good metallurgical quality and excellent performance. A coating with low dilution rate, good wear and corrosion resistance, and high bonding strength to achieve surface strengthening of parts. Coating forming stability and internal quality directly determine the quality and qualification of the part. In the process of laser cladding, the sticky powder on the surface of the melt channel causes pores to easily occur in the overlapping area and becomes ...

AI Technical Summary

Problems solved by technology

During the laser cladding process, powder sticking on the surface of the melt channel causes pores to easily occur in the overlapping area and becomes a source of crack propagation due to stress concentration at the pores. In addition, powder sticking on the surface of the melt channel also reduces the flatness of the molten layer surface, which further deteriorates the powder sticking. situation, which is not conducive to molding stability, but also increases the sensitivity of defect formation in the overlapping area

At the same time, due to the difference in properties between the coating and the base material, cracks are caused at the interface due to stress, which affects the quality and stability of the part.

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