Powder material of high temperature erosion resistant cladding layer and preparation method of cladding layer

Abstract

The invention relates to a powder material of a cladding layer with high temperature resistance and erosion resistance and a preparation method of the cladding layer, belonging to the technical field of surface engineering. The powder in the powder material comprises the following components by weight percent: 24-32% of pure titanium powder, 4.8-8% of graphite powder, 24-30% of chromium powder, 5-10% of molybdenum powder, 3-5% of titanium diboride powder, 1-3% of niobium carbide powder and the balance of nickel powder, wherein the weight ratio of pure titanium powder to graphite powder is 3.8-4. The preparation method of the cladding layer comprises the following steps: preparing mixed powder for cladding and preparing the cladding layer. The powder material has the advantages that the preparation cost is lower, the cladding layer has long life, the technology is easier and the powder material can be used to solve the preparation problem of the composite steel plate with high temperature erosion and corrosion resistance for the rocket launcher.

Description

technical field [0001] The invention belongs to the technical field of surface engineering, and in particular relates to a powder material of a high-temperature erosion-resistant cladding layer and a preparation method of the cladding layer. It is mainly aimed at the powder material of the high-temperature erosion-resistant and marine-atmospheric corrosion-resistant cladding layer on the surface of the steel plate used for rocket launchers, and the preparation of the cladding layer on the carbon steel and alloy steel plate substrates by using the laser cladding method. Background technique [0002] The directional device is a key component in the rocket launcher. Commonly used directional devices are divided into slide rail type, cage type, barrel type and box type. The slide rail directional device is an orienting device used in early rocket launchers, which is suitable for launching fin-stabilized rockets. The cage director consists of four rails and is suitable for launc...

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Problems solved by technology

For rocket launchers serving in marine climates, the metal materials used for the orienter are also subject to severe atmospheric corrosion. Since the length of the orienter is several meters, the corrosion products on the inner wall are difficult to remove, which brings great inconvenience to the daily maintenance of the rocket launcher.

[0004] Chromium electroplating is a commonly used technology to improve the high temperature erosion resistance and corrosion resistance of steel. However, due to the limited thickness of the chromium coating (generally 30-200 μm), the bonding strength between the coating and the substrate is not high, and the fatigue life of the chromium coating Shorter, the coating will gradually peel off after firing a certain number of rockets, and more serious high-temperature erosion or corrosion will occur where the coating peels off

[0005] Thermal spraying is also commonly used to prepare erosion-resistant and corrosion-resistant coatings on the surface of steel substrates, but the coatings prepared by thermal spraying are mechanically bonded to the substrate, such as spraying ceramic coatings, the bonding strength is generally only 20-50MPa; The layer is easy to peel off under the repeated action of high temperature and high pressure gas and solid particles, and its life and reliability are low

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