Special nickel-base metal ceramic alloy powder for connecting rod laser cladding

Abstract

The invention discloses a special nickel-base metal ceramic alloy powder for connecting rod laser cladding, which comprises the following components in percentage by weight: 10-12% of titanium carbide, 0.8-1.4% of carbon, 2-4% of calcium fluoride, 2-4% of silicon nitride, 9-12% of germanium, 18-24% of chromium, 2-4% of silicon, 5-7% of iron, 5-8% of molybdenum, 0.1-0.4% of manganese and the balance of nickel. The nickel-base metal ceramic alloy powder is specially used for connecting rod laser cladding, and can form a cladding layer on the connecting rod surface by a laser cladding technique. The nickel-base metal ceramic alloy powder can reduce bubbles, cracks and shrinkage void defects on the cladding layer, and enhances the fatigue resistance, toughness and hardness of the connecting rod.

Description

technical field [0001] The invention relates to an alloy powder, in particular to a nickel-based cermet alloy powder specially used for laser cladding of connecting rods. 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. Connecting rods are generally required to have strong fati...

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Problems solved by technology

Connecting rods are generally required to have strong fatigue strength, toughness, and hardness. In order to make the connecting rod meet the above mechanical performance requirements, the usual method is to use expensive materials, which results in high cost and great practicability of the connecting rod. Reduced, general small and medium-sized enterprises may not be able to afford

At present, the laser cladding process has not been applied to connecting rods. The reason is that there is no metal powder dedicated to laser cladding of connecting rods. When other metal powders are used for laser cladding of connecting rods, the heat transfer and melting are not uniform, and the metal Poor fusion between powder and substrate, resulting in defects such as cracks, shrinkage cavities, and pores

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