Special cobalt-based cermet alloy powder for laser cladding of surface of reamer

Abstract

The invention discloses special cobalt-based cermet alloy powder for the laser cladding of the surface of a reamer. The cobalt-based cermet alloy powder contains the following ingredients in percentage by weight: 12-14% of aluminum oxide, 0.2-0.3% of carbon, 1-3% of calcium fluoride, 3-5% of silicon nitride, 3-4% of boron, 0.2-0.6% of vanadium, 3-5% of silicon, 6-8% of ferrum, 18-20% of molybdenum and the balance of cobalt. The cobalt-based cermet alloy powder is special for the laser cladding of the reamer and is used for improving the compactness of the metal structure of the surface of the reamer, so that the hardness, strength and wear resistance of the reamer are improved.

Description

technical field [0001] The invention relates to an alloy powder, in particular to a cobalt-based cermet alloy powder specially used for laser cladding on the surface of a reamer. Background technique [0002] Laser has the characteristics of high brightness, high directionality, high monochromaticity and high coherence, and is now being used in more and more fields. 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. A reamer is a rotary tool used to remove a thin la...

AI Technical Summary

Problems solved by technology

The working environment of the reamer is harsh. In order to meet the requirements of strength, hardness and wear resistance, ordinary reamers are usually made of high-priced alloy materials. Although the mechanical properties of the reamer meet the requirements, the expensive price The practicability of this type of reamer is not high

However, there is currently no metal powder dedicated to laser cladding of reamers. When other metal powders are used for laser cladding of reamers, the heat transfer and melting are not uniform, and the degree of fusion between the new metal powder and the base material of the reamer is poor. , resulting in a series of adverse consequences such as cracks, shrinkage porosity, shrinkage cavities, and pores

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