Cobalt-base metal alloy powder special for continuous fiber laser cladding

Abstract

The invention discloses cobalt-base metal alloy powder special for continuous fiber laser cladding. The cobalt-base metal alloy powder comprises, by weight, 11-14% of silicon carbide, 5-7% of calcium fluoride, 12-15% of molybdenum, 8-12% of chromium, 2-4% of silicon nitride, 4-6% of silicon, 0.1-0.2% of carbon, 2-4% of antimony and the balance cobalt. The cobalt-base metal alloy powder is specially applied to cladding processes of continuous fiber lasers, absorption and utilization rate of lasers is obviously increased, and formed cladding layers have high hardness, tenacity and corrosion resistance, are compact in organization and are formed without defects such as pores, cracks and contraction cavities; further, dilution rate can be effectively controlled, and the cobalt-base metal alloy powder is simple and convenient to process and free of pre-heat-treatment and post-heat treatment.

Description

technical field [0001] The invention relates to an alloy powder, in particular to a cobalt-based metal alloy powder specially used for continuous optical fiber laser cladding. Background technique [0002] Laser cladding is one of the surface treatment technologies. In a nutshell, the principle of laser cladding is to use high-energy laser beams to irradiate the surface of metal materials, the surface of the substrate is melted rapidly, the liquid metal forms a small-scale molten pool, and new powder materials are filled at the same time. , the original metal material is mixed with the added powder to form a new layer of liquid metal. After the laser beam passes through, the liquid metal layer is rapidly cooled to form a solid cladding layer on the metal surface. With the continuous improvement of laser power and stability, it has been rapidly promoted and applied. Laser cladding technology can be widely used in aviation, national defense, petrochemical, metallurgy, medic...

AI Technical Summary

Problems solved by technology

[0003] However, there are almost no special cermet alloy powders for continuous fiber laser cladding on the domestic market at present, and most of the alloy powders used are self-fluxing alloy powders for thermal spraying

Due to the difference in heat transfer methods and process conditions of the two technologies, the laser absorption rate is low after the self-fluxing alloy powder used in thermal spraying is directly used in continuous fiber laser cladding, generally around 30-40%.

Moreover, the cladding layer is prone to defects such as cracks, shrinkage porosity, shrinkage cavities, and pores.