Ultrahigh-speed laser cladding system

Abstract

The invention belongs to the field of laser processing, and specifically provides an ultrahigh-speed laser cladding system. The system is characterized in that ultrahigh-speed laser cladding linearityspeed can be realized when a workpiece rotates at a high speed; laser and powder mutually act, and the system parameters are adjusted and matched, thus a dense cladding layer can be formed on the surface of the workpiece. Compared with a traditional laser cladding system, the ultrahigh-speed laser cladding system has the advantages that the laser cladding efficiency is improved dozens of times, and moreover, the obtained cladding layer is of a completely metallurgical combination form; the surface smoothness is high; the material utilization rate is high; the energy consumption is low; the production cost can be extremely saved; and the production efficiency is improved.

Description

Technical field [0001] The invention relates to an ultra-high-speed laser cladding system and method, belonging to the field of laser processing. Background technique [0002] In the field of construction machinery, many shaft metal components have requirements for corrosion resistance and wear resistance on the surface, and require special treatment. Common treatment systems include the following types. [0003] 1. Electroplating technology. The coating of this technology is thin, generally no more than 100μm. Therefore, it is easy for the entire part to fail due to damage to the partial coating under special conditions. Moreover, the bonding force between the coating and the substrate is weak, generally not exceeding 100MPa, and the corrosion resistance is poor, and it is easy to peel off. It also causes serious waste of resources and environmental pollution, which is an industry that urgently needs to be relieved. [0004] 2. Thermal spraying technology. This technology is mecha...

AI Technical Summary

Problems solved by technology

Due to the large number of pores in the coating prepared by thermal spraying, it must be prepared by multi-layer deposition (each layer is about 25-50 μm thick), resulting in reduced processing efficiency

In addition, the consumption of powder materials and gas in the processing process is relatively large, and the maximum utilization rate of materials is only about 50%.

[0005] 3. Overlay welding technology. The coating of this technology is generally thicker (about 2~3mm), but the parts need to be preheated, the heat input is large, and the heat-affected zone is large, resulting in large deformation of the parts and a decline in mechanical properties.

[0006] 4. Laser cladding technology, see figure 2 , this traditional technology has the advantages of high bonding strength, small heat quantity, small deformation, etc., and can obtain the required cladding layer properties by adjusting the powder composition, so it has begun to be applied in many industries, but the processing efficiency of this technology is low. The cladding rate is generally 0.5~3m / min, the powder utilization rate is low, generally about 50%, and the laser energy is focused on the matrix material, and the powder is mixed and bonded by melting the matrix material, which makes the laser energy utilization efficiency and cladding The rate is low, the powder is still a solid particle when combined with the base material, and the surface smoothness of the finished product is poor

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