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High-temperature-resistant abrasion-resistant remelting nickel-based composite coating for fire grate segment of garbage incinerator and preparation of high-temperature-resistant abrasion-resistant remelting nickel-based composite coating

A waste incinerator and composite material technology, which is applied in the field of high temperature resistant and anti-abrasion remelted nickel-based composite material coating and its preparation, can solve the problems of low bonding strength, short service life of grate pieces, and long-term stable use of incinerators and other issues to achieve the effect of high bonding strength

Active Publication Date: 2020-11-03
JIANGSU KEHUAN INNOVATIVE MATERIAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0040] The second aspect of the present invention provides a method for preparing a high-temperature-resistant and anti-abrasion remelted nickel-based composite coating for waste incinerator grates as described in the first aspect of the present invention, which includes:

[0041] Step A, mix nano-thermite powder with water glass, and uniformly press-coat the surface of the waste incinerator grate sheet, so that the thickness of the nano-thermite prefabricated coating is 0.5-1 mm, and after drying, place it on the waste incinerator grate sheet The surface is pre-coated with nano thermite;

[0042] Step B, use the manipulator to drive the flame spray gun, spray Ni60A and other nickel-based self-fluxing alloy powder materials along the surface contour of the waste incinerator grate, and the molten droplets (produced by spraying) ignite the surface of the waste incinerator grate to form a prefabricated coating The nano-thermite makes it undergo a self-propagating high-exothermic ...

Embodiment 1

[0066] (1) 50nm aluminum powder, 50nm ferroferric oxide according to the chemical formula 8Al+3Fe 3 o 4 = 4 Al 2 o 3 +9Fe preparation, in a ball mill, add organic solvent (ethanol) and mix for 8 hours, then mix into water glass according to the amount ratio of nano-thermite powder to water glass of 20:1, mix well, and prepare nano-thermite Powder and water glass mixture;

[0067] (2) Evenly press-coat the nano-thermite powder and water glass mixture on the surface of the waste incinerator grate, with a thickness of about 0.5-1 mm;

[0068] (3) After drying, use the manipulator to drive the flame spraying gun, and spray Ni60A self-fluxing alloy powder evenly along the surface contour of the waste incinerator grate, and the molten droplets ignite the pre-coated nano thermite on the surface of the waste incinerator grate, so that It produces a high exothermic reaction, instantly melts the surface of the grate substrate of the garbage incinerator, fuses the sprayed nickel-base...

Embodiment 2

[0073] (1) 50nm aluminum powder, 50nm ferroferric oxide according to the chemical formula 8Al+3Fe 3 o 4 = 4Al 2 o 3 +9Fe preparation, in a ball mill, add organic solvent (ethanol) and mix for 8 hours, then mix into water glass according to the amount ratio of nano thermite powder to water glass is 20:1, mix well to prepare nano thermite Powder and water glass mixture;

[0074] (2) Evenly press-coat the nano-thermite powder and water glass mixture on the surface of the waste incinerator grate, with a thickness of about 0.8 mm;

[0075] (3) After drying, use the manipulator to drive the flame spraying gun, and spray Ni60A self-fluxing alloy powder evenly along the surface contour of the waste incinerator grate, and the molten droplets ignite the pre-coated nano thermite on the surface of the waste incinerator grate, so that It produces a high exothermic reaction, instantly melts the surface of the grate substrate of the garbage incinerator, fuses the sprayed nickel-based sel...

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PUM

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Abstract

The invention relates to a high-temperature-resistant abrasion-resistant remelting nickel-based composite coating for a fire grate segment of a garbage incinerator. The high-temperature-resistant abrasion-resistant remelting nickel-based composite coating is a remelting nickel-based self-fluxing alloy-based aluminum oxide particle reinforced composite coating. The coating is cladded on the surfaceof the fire grate segment and is metallurgically bonded with the surface of a fire grate segment base body. The invention also relates to the preparation method of the coating. The method comprises the following steps: firstly, pressing and coating high-heat-release nano thermite on the surface of the fire grate segment, then spraying a nickel-based self-fluxing alloy material, preparing the nickel-based self-fluxing alloy-based composite coating on the surface of the fire grate segment through a self-propagating reaction caused by spraying, enabling a spraying coating to be in metallurgicalbonding with a thermite reaction product and the base body, finally, remelting a self-fluxing alloy layer sprayed on the surface through an induction coil or oxyacetylene flames, and obtaining the compact abrasion-resistant coating. The coating prepared through the method is compact in structure, smooth in surface, high in interface bonding strength with the base body, good in high-temperature abrasion resistance, suitable for curved surface automatic surfacing and capable of achieving industrial batch production.

Description

technical field [0001] The invention belongs to the technical field of surface engineering, and relates to a high-temperature-resistant and anti-abrasion remelted nickel-based composite material coating for grate plates of garbage incinerators and a preparation method thereof. Background technique [0002] The grate of the waste incineration power plant transports 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 severely abrasive. The domestic 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 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-metallu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/129C23C4/134C23C4/06F23G5/48
CPCC23C4/129C23C4/134C23C4/06F23G5/48Y02E20/12
Inventor 曲作鹏陈大智陈威王海军
Owner JIANGSU KEHUAN INNOVATIVE MATERIAL CO LTD
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