High temperature resistant and anti-abrasion remelting nickel-based composite material coating for waste incinerator grate sheets and preparation method thereof

Abstract

The invention relates to a high-temperature-resistant, abrasion-resistant remelting nickel-based composite material coating for the grate sheets of a waste incinerator, which is a remelting nickel-based self-fluxing alloy-based alumina particle-reinforced composite material coating; the coating is clad on the furnace The surface of the grate sheet is metallurgically combined with the surface of the grate sheet substrate. The invention also relates to a method for preparing the above-mentioned coating. The method firstly press-coats a high-exothermic nano-thermite on the surface of the grate sheet, and then sprays a nickel-based self-fluxing alloy material. The surface of the sheet is made of a nickel-based self-fluxing alloy-based composite material coating, so that the sprayed layer forms a metallurgical bond with the thermite reaction product and the matrix. Finally, the self-fluxing alloy layer sprayed on the surface is remelted with an induction coil or an oxyacetylene flame. , to obtain a dense anti-abrasion coating. The coating prepared by the method has dense structure and smooth surface, high bonding strength between the coating and the substrate interface, and good high temperature abrasion resistance, which is suitable for automatic surfacing of curved surfaces and can be industrialized and mass produced.

Description

technical field [0001] The invention belongs to the technical field of surface engineering, and relates to a high-temperature-resistant, anti-abrasion, remelting nickel-based composite material coating for grate sheets of a garbage incinerator and a preparation method thereof. Background technique [0002] The grate sheet of the waste incineration power plant transports the burning waste under the conditions of high temperature, corrosive gas and friction and wear in the incinerator, and the surface in contact with the waste is seriously eroded. The domestically produced waste incinerator grate has a short service life (7-10 months), which affects the long-term stable use of the incinerator. It is urgent to improve the manufacturing process and prolong the service period. [0003] In the prior art, the anti-corrosion coating with excellent surface quality can be obtained by the remelting process after thermal spraying of the nickel-based alloy, but the coating and the substr...

AI Technical Summary

Problems solved by technology

The service life of the domestic waste incinerator grate is short (7-10 months), which affects the long-term stable use of the incinerator. It is urgent to improve the manufacturing process and extend the service period

[0003] In the prior art, the corrosion-resistant coating with excellent surface quality can be obtained by thermal spraying nickel-based alloy and then remelting process, but the coating and the substrate are only micro-metallurgically bonded, not complete metallurgically bonded, and the bonding strength is not high. When the coating is easy to fall off, it is urgent to develop a preparation technology for the high-temperature-resistant and anti-abrasion coating that has high bonding strength and is not easy to fall off.