Special cobalt-based metal ceramic powdered alloy for cladding process of continuous wave optical fiber laser

Abstract

The invention discloses special cobalt-based metal ceramic powdered alloy for cladding process of a continuous wave optical fiber laser. The special cobalt-based metal ceramic powdered alloy comprises 11-13% of silicon carbide, 5-7% of calcium fluoride, 2-4% of silicon nitride, 8-10% of chromium, 2-4% of iridium, 0.1-0.2% of carbon, 1-1.4% of manganese, 5-7% of iron and the balance of cobalt and inevitable impurities in percentage by weight. The cobalt-based metal ceramic powdered alloy is specially used for the cladding process of the high-energy continuous wave optical fiber laser; due to the adoption of the metal ceramic powdered alloy, the rate of absorption and utilization of laser is obviously improved; a cladding layer formed by the cobalt-based metal ceramic powdered alloy has high hardness, high toughness, high corrosion resistance and compact texture without defects such as air holes, cracks and shrinkage cavities; the process is simple and convenient, and the heat treatment before and after cladding is not needed.

Description

technical field [0001] The invention relates to an alloy powder, in particular to a cobalt-based cermet alloy powder specially used for continuous wave 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,...

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.