Special nickel base metal ceramic alloy powder for continuous wave fiber laser cladding

Abstract

The invention discloses a special nickel base metal ceramic alloy powder for continuous wave fiber laser cladding. The special nickel base metal ceramic alloy powder contains the following components in percentage by weight: 15-21% of aluminum oxide, 9-13% of titanium dioxide, 2-5% of calcium fluoride, 2-6% of cerium oxide, 2-5% of silicon nitride, 2-4% of silicon and the balance of nickel bases. The nickel base metal ceramic alloy powder not only can be used for greatly increasing the absorption rate of a metal piece to laser and reducing the melting point, but also can be used for forming a cladding layer which is compact in internal tissue and free of defects such as cracks, shrinkage holes, air bubbles and the like on the surface in a continuous wave fiber laser cladding process, so that the service life of the metal piece is greatly prolonged, and the production cost is reduced.

Description

technical field [0001] The invention discloses a cermet alloy powder, in particular a nickel-based cermet alloy powder specially used for continuous wave optical fiber laser cladding. 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, among which laser cladding is one of the surface treatment technologies. In a nutshell, the principle of laser cladding is to irradiate the surface of the metal material with a high-energy laser beam, so that the surface of the substrate is melted rapidly, and the liquid metal forms a small-scale molten pool, and at the same time, new powder materials are filled. In the process, the original metal material is mixed with the added powder to form a new layer of liquid metal. After the laser beam scans, the liquid metal layer cools down rapidly to form a solid cladding layer on the metal surface. [0003] How...

AI Technical Summary

Problems solved by technology

The cladding layer is prone to defects such as cracks, shrinkage porosity, shrinkage cavities, and pores, and the hardness and strength of the cladding layer often cannot meet the production requirements

For example, the content of boron and silicon in most self-fluxing alloy powders is relatively high, so that some inclusions such as borosilicate during the laser cladding process cannot smoothly float out of the rapidly solidified molten pool, resulting in cracking sensitivity of the laser cladding layer Large, the cracking phenomenon is particularly obvious when the hardness of the laser cladding layer is high

Images