Ceramic-phase-containing iron-based amorphous nanocrystalline composite coating and preparation thereof

Abstract

The invention belongs to the field of thermal spraying and particularly relates to a composite amorphous and nano-crystalline coating layer with ceramic phase and ferrum base and a preparation method thereof. Carbide or oxide ceramics of Co or Ni ladles are firstly added into a flux core, a flux-cored wire is prepared together with the flux core and a ferrum-base alloy with amorphous ingredients and used as a spraying material, and the electric arc spraying method is adopted for leading the flux-cored wire to be melted, atomized into fused drops and finally deposited on a substrate, thus preparing the composite amorphous and nano-crystalline coating layer with ceramic-phase structure and ferrum base, which has the performance of high bond strength, good wear resistance, corrosion resistance and oxidation resistance as well as remarkably prolonged service life of the substrate, and the composite amorphous and nano-crystalline coating layer with ceramic phase and ferrum base can be widely applied to the restoration and the protection of device parts in the fields of metallurgy, electric power and petroleum, etc.

Description

technical field [0001] The invention belongs to the field of thermal spraying, in particular to an iron-based amorphous nanocrystalline composite coating containing a ceramic phase and a preparation method thereof. Background technique [0002] The failure of materials mostly occurs on the surface. Wear and corrosion are the most common forms of failure of materials or mechanical parts during use, which cause huge losses to the national economy every year. Surface engineering technology is an important way to improve the surface properties of materials, among which thermal spraying technology is one of the most important technologies. A layer of metal or cermet coating can be deposited on the surface of the material by thermal spraying, so that it has properties such as wear resistance, corrosion resistance, and oxidation resistance, thereby protecting the base material. With the rapid development of current industrial technology, higher requirements are put forward for the...

AI Technical Summary

Problems solved by technology

However, a single ceramic coating is limited in its application because of its high porosity, low fracture toughness and large thermal expansion coefficient difference with the base metal material; metal-ceramic composite coatings, such as Cr3C2-(NiCr), Metal-ceramic composite coatings such as WC-Co can obtain high coating quality and good coating performance, and are widely used. For example, Cr3C2-(NiCr) coatings are applied to high-temperature erosion protection of boiler pipes. The disadvantage is that the material High cost, mainly using plasma spraying or high-speed flame spraying, complex process, high construction cost and inconvenient on-site construction

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