Cored wire for preparing Al-Ni-Zr-Cr amorphous coating by utilizing high velocity arc spraying technology

Abstract

The invention discloses a cored wire for preparing an Al-Ni-Zr-Cr amorphous coating by utilizing a high velocity arc spraying technology. The cored wire is characterized in that the skin of the cored wire is a pure aluminum belt, wherein the mass percentage of a core accounting for the wire is 32 to 40 percent; the core is prepared from the following components in percentage by mass: 16 to 24 percent of Ni, 8 to 14 percent of Zr and 0 to 8 percent of Cr. The preparation method comprises the following steps: firstly, rolling the pure aluminum belt into a U shape; secondly, weighing accessories according to the mass percentage of all the components of the core, and putting the weighed powder into a powder mixing machine for mixing; thirdly, adding uniformly-mixed powder into a U-shaped aluminum belt groove according to a powder adding coefficient of 32 to 40 percent, sealing the U-shaped aluminum belt groove and enabling the powder to be accommodated in the U-shaped aluminum belt groove; finally, reducing the diameter by multiple paths of wire drawing until the cored wire with the diameter of 2.0mm is obtained. The cored wire has relatively high amorphous forming ability; the coating prepared by adopting the high velocity arc spraying technology has the advantages of relatively high content, relatively high hardness and double functions of corrosion resistance and wear resistance, and can provide effective surface protection for steel structural components and light alloy parts of marine equipment.

Description

technical field [0001] The invention belongs to the field of thermal spraying in the professional surface treatment technology of material processing engineering, and relates to a powder core wire material used for preparing Al-Ni-Zr-Cr amorphous coating by high-speed arc spraying technology, which is mainly used in marine corrosion Surface protection of steel structural parts and light alloy parts of equipment serving in the environment. Background technique [0002] Aluminum-based amorphous alloys have the advantages of excellent corrosion resistance, good toughness, high strength, etc., and have become one of the focuses of researchers in this century. Amorphous has no defects such as grain boundaries, which can hinder the erosion of corrosive media, and the amorphous material itself has high strength and hardness, which endows the amorphous material with excellent comprehensive properties. When the amorphous part is nanocrystallized, the precipitated nanoparticles can f...

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Problems solved by technology

Among them, Al-Ni-Mm-Co (Chinese patent application number 201310260182.1), Al-Ni-Y-Co ("Acta Metallica" 2012, 48 (3) 289-297) and other amorphous and nanocrystalline coating materials The powder core wire contains rare earth elements, which makes its preparation cost relatively expensive, and the formed coating has a relatively low amorphous content and a high crystal content, so it cannot reflect the performance advantages of the amorphous coating; Al-Si -Ni-Fe (Chinese patent application number 201410625058.5) is added to the amorphous nanocrystalline coating with Fe element with poor corrosion resistance, which seriously affects the overall anti-corrosion performance of the coating

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