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
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[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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