Rotating light beam ultra-high speed laser cladding method and device

Abstract

The invention provides a rotating light beam ultra-high speed laser cladding method and relates to an efficient laser cladding method. The rotating light beam ultra-high speed laser cladding method aims to solve the technical problems of low cladding speed and low efficiency of a prior laser cladding method. When laser cladding is carried out, optical elements are adopted to form a light beam rotating at a high speed according to a set path, and the light beam does uniform circular or elliptical circular motion on a workpiece to be clad. In the high-speed rotating process, a large-size light spot with approximately uniform energy density distribution is formed in space by the light beam, and therefore more powder is irradiated and heated by laser in this region, melts, falls into a moltenpool in a liquid or semi-solid form, and is cooled to form a cladding layer. Compared with a conventional laser cladding method, the method can greatly improve the powder feeding rate, and improve thecladding efficiency by 3-5 times. In addition, a larger molten pool is formed on the workpiece, and therefore the utilization rate of the powder is further improved.

Description

technical field [0001] The invention relates to the technical field of laser cladding, in particular to a rotating beam ultra-high-speed laser cladding method and device. Background technique [0002] At this stage, laser cladding technology is mainly used to form a layer of functional coating different from the base material on the metal surface to improve the wear resistance and corrosion resistance of the base material. [0003] Many shaft parts, such as hydraulic supports, rollers, offshore platform columns, etc., have requirements for wear resistance or corrosion resistance on the outer or inner surface, which is a major application field in the surface treatment industry. The existing surface treatment methods mainly include several methods such as laser cladding, electroplating and thermal spraying. Among them, compared with the thermal spraying technology, the laser cladding technology can make the cladding material and the base material produce metallurgical bondin...

AI Technical Summary

Problems solved by technology

[0005] like figure 2 As shown, it is a schematic diagram of traditional laser cladding work. The laser cannot be rotated, and it directly intersects at the powder focus point. The area of ​​the molten pool formed is small, and the laser energy density is uneven, with high density in the middle and low density at the edge.

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