CN212273994U - Fire grate segment of garbage incinerator with high-temperature-resistant and abrasion-resistant coating on surface - Google Patents
Fire grate segment of garbage incinerator with high-temperature-resistant and abrasion-resistant coating on surface Download PDFInfo
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- CN212273994U CN212273994U CN202022144090.5U CN202022144090U CN212273994U CN 212273994 U CN212273994 U CN 212273994U CN 202022144090 U CN202022144090 U CN 202022144090U CN 212273994 U CN212273994 U CN 212273994U
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Abstract
The utility model belongs to the technical field of surface engineering, a garbage incinerator fire grate segment that surface has high temperature resistant abrasionproof coating is related to, this fire grate segment includes fire grate segment base member, cladding in the ordinary wearing and tearing of fire grate segment district surface high fine and close TiCNiMo metal ceramic matrix composite coating of non-and the cladding in the high wearing and tearing of fire grate segment district surface high density TiCNiMo metal ceramic matrix composite coating. The fire grate segment has excellent high-temperature abrasion resistance, can meet the severe service conditions in the waste incinerator, and has a longer service period.
Description
Technical Field
The utility model belongs to the technical field of surface engineering, a garbage incinerator fire grate segment that surface has high temperature resistant abrasionproof coating is related to.
Background
The grate segments of a garbage incinerator are subjected to high temperature, corrosive gas and frictional wear in the incinerator to push the burning garbage, and the surface contacting with the garbage is severely abraded. The service life of the grate segment of the domestic garbage incinerator is short (7-10 months), the long-period stable use of the incinerator is influenced, and the improvement on the aspects of design, materials, process and the like is urgently needed to improve the service period of the grate segment.
SUMMERY OF THE UTILITY MODEL
One of the purposes of the utility model is to overcome the above insufficiency, provide a surface has the waste incinerator fire grate segment of high temperature resistant abrasionproof coating, the coating on the surface of this fire grate segment has good high temperature abrasion resistance, can satisfy abominable service condition in the waste incinerator, has improved the service cycle of fire grate segment.
Therefore, the utility model provides a surface has waste incinerator fire grate segment of high temperature resistant abrasionproof coating, it includes fire grate segment base member, cladding in the ordinary wearing and tearing of fire grate segment district surface on non-high fine and close TiCNiMo metal ceramic matrix composite coating and cladding in the high wearing and tearing of fire grate segment district surface on high density TiCNiMo metal ceramic matrix composite coating.
According to the utility model, the non-highly compact TiCNiMo metal ceramic matrix composite coating is metallurgically bonded with the surface of the grate base sheet; the high-density TiCNiMo metal ceramic matrix composite coating is metallurgically bonded with the surface of the grate substrate.
In some embodiments of the present invention, the high-abrasion region of the grate segment is located at a front curved portion of the grate segment, and the normal-abrasion region of the grate segment is located at a flat plate portion of the grate segment.
In other specific embodiments of the present invention, the thickness of the non-highly dense TiCNiMo cermet matrix composite coating is 1-2 ± 0.2 mm; the thickness of the high-density TiCNiMo metal ceramic matrix composite coating is 1-2 +/-0.2 mm.
In the utility model, the grate segment is made of 1Cr18Ni9 Ti.
The utility model has the advantages that:
the utility model discloses to scribble the interior surface that corresponds to the ordinary erosion district of grate bar piece in the liquid forging mould from spreading the powder material that TiCNiMo prepared according to the self-propagating reaction principle and water glass misce bene, and simultaneously, the TiCNiMo from spreading the powder material cold pressing flakiness of misce bene, bond the interior surface in the serious erosion district in the mould with water glass again, then pour into a mould and liquid die forging, in the preparation of grate bar, melt-cover non-highly compact TiCNiMo metal ceramic matrix composite coating and melt-cover the high-height TiCNiMo metal ceramic matrix composite coating in the high erosion district surface of grate bar piece at the ordinary erosion district surface of grate bar piece, can make a waste incinerator grate bar piece that the surface has high temperature resistant abrasionproof coating from this. The coating on the surface of the fire grate segment has excellent high-temperature abrasion resistance, can meet the severe service conditions in the waste incinerator, and improves the service period of the fire grate segment.
Drawings
The present invention will be described with reference to the accompanying drawings.
Fig. 1 shows a fire grate segment of a garbage incinerator with a high temperature and abrasion resistant coating on the middle surface.
The reference numerals in fig. 1 have the meaning: 1 grate segment (base); 11 grate segment flat plate section; 12 front bending part of fire grate segment; 21 a non-highly dense TiCNiMo cermet matrix composite coating; 22 high-density TiCNiMo metal ceramic matrix composite coating.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described in detail with reference to the accompanying drawings. Before the present invention is described in detail, it is to be understood that this invention is not limited to particular embodiments described. It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments only, and is not intended to be limiting.
Unless otherwise defined, all terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Although any methods and materials similar or equivalent to those described herein can also be used in the practice or testing of the present invention, the preferred methods and materials are now described.
I. Term(s) for
Liquid die forging: liquid die forging is a new metal forming process which not only has casting characteristics, but also is similar to die forging. A certain amount of metal liquid to be cast is directly poured into a cavity coated with a lubricant, mechanical static pressure is continuously applied, and a solidified hard shell is plastically deformed by utilizing the technology of easy flowing and forging during metal casting, solidification and forming, so that metal is crystallized and solidified under the pressure, and shrinkage cavities and shrinkage porosity formed by solidification and shrinkage are forcibly eliminated, and a liquid die forging workpiece without casting defects is obtained.
The term "self-propagating reaction" in the present invention refers to a self-propagating high-temperature synthesis reaction; the self-propagating high-temperature synthesis (SHS) is a technique for synthesizing materials by utilizing self-heating and self-conduction of high chemical reaction heat between reactants, and once the reactants are ignited, the reactants automatically propagate to an unreacted area until the reaction is complete, so that the method is a novel method for preparing inorganic compound high-temperature materials.
II. Detailed description of the preferred embodiments
As described above, the surface of the grate segment of the garbage incinerator contacted with garbage is seriously abraded, the service life of the grate segment of the domestic garbage incinerator is short (7-10 months), the long-period stable use of the incinerator is influenced, and the improvement of the design, the material, the process and the like is urgently needed to improve the service period of the grate segment. In view of the above, the present inventors have conducted extensive studies on the technology of preventing the erosion of the grate segments of the garbage incinerator.
The inventor researches and designs and discovers that the fire grate segment is made of 1Cr18Ni9Ti and is formed by liquid die forging; preparing a Ti + C + Ni + Mo TiCNiMo self-propagating powder material according to a self-propagating reaction principle, uniformly mixing, adding water glass, uniformly mixing, uniformly coating the inner surface of a liquid forging die, drying, pouring 1Cr18Ni9Ti molten steel according to a conventional liquid forging process, contacting the molten steel with the Ti + C + Ni + Mo powder coated on the inner surface of the liquid forging die to initiate a self-propagating reaction, welding the molten steel and the TiCNiMo to form metallurgical bonding, forming a TiCNiMo metal ceramic-based composite material coating on the surface of a grate segment, and immediately pressurizing to perform liquid forging after pouring. For the serious position of abrasion, in order to improve the local abrasion resistance, this position does not coat above-mentioned mixed material, Ti + C + Ni + Mo powder material mixed evenly before pouring the molten steel, cold pressing becomes the slice of 1-2mm thick, the suppression density is 60% -80% of its mixed powder theoretical density that corresponds, pour and liquid die forging after bonding at the mould corresponding position with water glass, can make a surface have the garbage incinerator fire grate segment of high temperature resistant abrasionproof coating, and obtain from this the utility model discloses a fire grate segment of garbage incinerator that has high temperature resistant abrasionproof coating.
Therefore, the utility model relates to a surface has waste incinerator fire grate segment of high temperature resistant abrasionproof coating as shown in fig. 1, can see from fig. 1, waste incinerator fire grate segment that surface has high temperature resistant abrasionproof coating includes fire grate segment base member 1, cladding in the ordinary wearing and tearing of fire grate segment district surface not high fine and close TiCNiMo metal ceramic matrix composite coating 21 and cladding in the high wearing and tearing of fire grate segment district surface high density TiCNiMo metal ceramic matrix composite coating 22.
According to the utility model, the non-highly compact TiCNiMo metal ceramic matrix composite coating 21 is metallurgically bonded with the surface of the grate segment substrate; the high-density TiCNiMo metal ceramic matrix composite coating 22 is metallurgically bonded with the surface of the grate segment substrate.
In some embodiments of the present invention, the high erosion zone of the grate segments is located in the front curved portion 12 of the grate segments, and the normal erosion zone of the grate segments is located in the flat plate portion 11 of the grate segments.
It should be understood by those skilled in the art that the term "front curved portion of the grate segments" in the present application refers to the entire front heated surface portion of the grate segments.
In some specific embodiments of the present invention, the thickness of the non-highly dense TiCNiMo cermet matrix composite coating is 1-2 ± 0.2 mm; the thickness of the high-density TiCNiMo metal ceramic matrix composite coating is 1-2 +/-0.2 mm.
In the utility model, the grate segment is made of 1Cr18Ni9 Ti.
The utility model also provides a preparation method of foretell surface has the high temperature resistant anti-abrasion coating's of waste incinerator fire grate segment, can understand for the method of preparing high temperature resistant anti-abrasion coating on waste incinerator fire grate segment surface, also can understand for solving the high temperature resistant anti-abrasion problem method of waste incinerator fire grate segment, this method is 1Cr18Ni9Ti based on fire grate segment material, and liquid die forging takes shape, and it includes:
step A, preparing a Ti + C + Ni + Mo TiCNiMo self-propagating powder material according to a self-propagating reaction principle: preparing 250-mesh C powder and Ti powder according to the atomic ratio of 1: 1, adding 200-mesh Ni powder and 5 wt% Mo powder which are 5 wt% of the total weight of the C powder and the Ti powder, and performing ball milling for 8-9 hours to prepare TiCNiMo self-propagating mixed powder (TiCNiMo self-propagating powder material);
step B, mixing 15-20 wt% of water glass of the total weight of the TiCNiMo self-propagating mixed powder into the TiCNiMo self-propagating mixed powder for mixing to form a TiCNiMo self-propagating preset coating material;
step C, uniformly coating the TiCNiMo self-propagating preset coating material on the inner surface, corresponding to the common abrasion area of the fire grate segment, of a liquid die forging die for forming the fire grate segment, drying to form the TiCNiMo self-propagating preset coating, and enabling the thickness of the TiCNiMo self-propagating preset coating to be 2-3 +/-0.2 mm;
step D, cold-pressing the TiCNiMo self-propagating mixed powder into a TiCNiMo pressed sheet, wherein the thickness of the TiCNiMo pressed sheet is 1-2 +/-0.2 mm, and the density of the TiCNiMo pressed sheet is 60-80% of the theoretical density of the corresponding mixed powder;
step E, bonding the TiCNiMo pressed sheet to a part, corresponding to a high-abrasion area of the fire grate sheet, of the inner surface of the fire grate sheet liquid forging die by using water glass;
and step F, pouring 1Cr18Ni9Ti molten steel into the die according to a conventional liquid die forging process, enabling the 1Cr18Ni9Ti molten steel to contact with the TiCNiMo self-propagating preset coating to initiate a self-propagating reaction, welding the molten steel and the coating together due to high temperature, then quickly pressurizing at a pouring riser, maintaining the pressure for 3-5 minutes, and cooling to obtain the fire grate segment, wherein the surface of the ordinary abrasion area is coated with a non-high-density TiCNiMo metal ceramic-based composite material coating with the thickness of 1-2 +/-0.2 mm, and the surface of the high abrasion area is coated with a high-density TiCNiMo metal ceramic-based composite material coating with the thickness of 1-2 +/-0.2 mm.
Specifically, in the step F, 1Cr18Ni9Ti molten steel is poured into the mold according to a conventional liquid die forging process, the 1Cr18Ni9Ti molten steel contacts with the TiCNiMo self-propagating powder (including TiCNiMo powder in a TiCNiMo self-propagating preset coating and TiCNiMo powder in a TiCNiMo preform) to initiate a self-propagating reaction, so as to form a TiCNiMo metal ceramic matrix composite coating, the molten steel and the corresponding coating are welded together, then the molten steel is rapidly pressurized at a pouring riser, the pressure is maintained for 3 to 5 minutes, and after cooling, the fire grate segment is obtained, wherein the surface of the ordinary area is coated with the non-high-density TiCNiMo metal ceramic matrix composite coating, and the surface of the high-density TiCNiMo metal ceramic matrix composite coating is coated on the high-abrasion area.
More specifically, in the step F, pouring 1Cr18Ni9Ti molten steel into the mold according to a conventional liquid die forging process, contacting the 1Cr18Ni9Ti molten steel with TiCNiMo powder in a TiCNiMo self-propagating pre-set coating on the inner surface of the common abrasion area corresponding to the grate segment to initiate a self-propagating reaction to form a TiCNiMo metal ceramic matrix composite coating, welding the molten steel and the corresponding coating together, rapidly pressurizing at a pouring riser, maintaining the pressure for 3-5 minutes, and cooling to obtain the grate segment coated with the non-highly dense TiCNiMo metal ceramic matrix composite coating on the surface of the common abrasion area; and (3) contacting the 1Cr18Ni9Ti molten steel with TiCNiMo powder in the TiCNiMo pressed sheet on the inner surface of the high-abrasion area corresponding to the grate segment to initiate a self-propagating reaction to form a TiCNiMo metal ceramic matrix composite coating, welding the molten steel with the corresponding coating, rapidly pressurizing at a pouring riser, maintaining the pressure for 3-5 minutes, and cooling to obtain the grate segment coated with the non-high-density TiCNiMo metal ceramic matrix composite coating on the surface of the high-abrasion area.
It should be understood by those skilled in the art that, in step F, the 1Cr18Ni9Ti molten steel is poured into the mold according to a conventional liquid die forging process, so that the 1Cr18Ni9Ti molten steel contacts with the ticnio self-propagating powder (including ticnio powder in the ticnio self-propagating pre-coating and ticnio powder in the ticnio pressing sheet) to initiate the self-propagating reaction, so as to form a ticnio metal ceramic matrix composite coating, and the molten steel and the corresponding coating are welded together at the same time. Similarly, when the molten steel and the corresponding coating are welded together, rapidly pressurizing at a pouring riser, maintaining the pressure for 3-5 minutes, and cooling to obtain a fire grate segment coated with a non-high-density TiCNiMo metal ceramic-based composite material coating on the surface of a common abrasion area, and a high-density TiCNiMo metal ceramic-based composite material coating on the surface of the high abrasion area; the process belongs to a forging process, and the solidified hard shell is plastically deformed by utilizing the technology of easy flowing and forging when metal is cast, solidified and formed, so that metal is crystallized and solidified under pressure, shrinkage cavities and shrinkage porosity formed by solidification and shrinkage are forcibly eliminated, the density of the TiCNiMo metal ceramic matrix composite coating is enhanced, and the metallurgical bonding between the TiCNiMo metal ceramic matrix composite coating and a fire grate segment is further enhanced. Therefore, it is easy to understand that the utility model discloses well grate segment, cladding in the ordinary erosion district surface (heating surface) non-high density TiCNiMo cermet base composite coating, and cladding in the high erosion district surface (heating surface) high density TiCNiMo cermet base composite coating make through pouring and initiation self-propagating reaction and forging (liquid forging).
It can be seen from the above that, the utility model discloses in make the surface have high temperature resistant abrasionproof and corrode the waste incinerator fire grate segment of coating and realize mainly through following mode: the grate sheet is made of 1Cr18Ni9Ti and is formed by liquid die forging; the method comprises the steps of uniformly mixing a TiCNiMo self-propagating powder material prepared according to a self-propagating reaction principle with water glass, coating the mixture on the inner surface of a liquid die forging die corresponding to a common abrasion area of a fire grate segment, simultaneously, cold-pressing the uniformly mixed TiCNiMo self-propagating powder material into a sheet shape, bonding the sheet shape on the inner surface of a severe abrasion area in the die by using the water glass, then pouring and liquid die forging, cladding a non-high-density TiCNiMo metal ceramic-based composite material coating on the surface of the common abrasion area of the fire grate segment and a high-density TiCNiMo metal ceramic-based composite material coating on the surface of the high abrasion area of the fire grate segment while manufacturing the fire grate segment, and thus, the waste incinerator fire grate segment with a high-temperature and wear resistant coating on the surface can be manufactured.
The inventor researches and finds that titanium carbide (TiC) is metal ceramic, has high-temperature chemical stability, hardly reacts with hydrochloric acid and sulfuric acid, is extremely corrosion-resistant, and is the best choice for the surface anti-abrasion coating of the fire grate segment. Titanium carbide (TiC) atoms are combined by strong covalent bonds, the cohesive strength of the coating is high, and the coating has strong abrasion resistance when being used as a grate piece coating. Has high melting point, boiling point and hardness, second to diamond hardness, good conductivity, and can be used as welding material for welding with metal. Titanium carbide is a typical transition metal carbide. The alloy is formed by mixing ionic bonds, covalent bonds and metal bonds in the same crystal structure, and the basic characteristics of high hardness, high melting point, wear resistance, conductivity and the like are determined by the crystal structure. In the past, TiC is widely used for manufacturing metal ceramics, heat-resistant alloy, hard alloy, wear-resistant material, high-temperature radiation material and other high-temperature vacuum devices, and is used as a high-temperature and abrasion-resistant coating of a fire grate segment, which is a prominent substantive characteristic of the utility model.
The reason for selecting Ni as the additive is that Ni participates in the self-propagating high-temperature synthesis reaction of Ti and C, Mo, and the reaction product is a Ni toughened TiC-based composite material. The mechanism of Ti-C-Ni self-propagating high-temperature synthesis (SHS) is a dissolution and precipitation mechanism, solid diffusion of nickel powder and titanium powder causes formation of a low-melting point TiNi solution, Ti, Ni and C powder particles are gradually dissolved into the TiNi solution, and when the concentrations of Ti and C in the TiCNi solution are saturated, TiC particles are precipitated from the TiCNi solution, and meanwhile, a Ni3Ti matrix for bonding the TiC particles is formed.
The addition of Mo refines the crystal grains, improves the heat strength, and keeps enough strength and creep resistance at high temperature. The casting with casting-assisted self-propagating reaction has many advantages: (1) energy conservation: the self-propagating reaction fully utilizes the heat emitted by the chemical reaction, the temperature can reach 1500-4000 ℃ in the synthesis process, the self-propagating reaction is thermally superposed with the molten steel poured in the casting process to melt the coating, and compared with methods such as surfacing welding and the like, external energy is not needed; (2) the cost is low: cheap raw materials, simple equipment, energy-saving process, less production personnel and small plant area. The washing resistance of the metal ceramic generated by the self-propagating reaction is outstanding; the coating material can be modified by adding the filler, so that the coating material has designability. The metal ceramic matrix composite material has excellent high-temperature abrasion resistance. Can meet the severe service conditions in the waste incinerator. The cast compounding can lead the coating and the matrix to form metallurgical bonding, and the bonding strength of the coating and the matrix is high. The method has the advantages of simple process, low cost, capability of simultaneously generating the metal ceramic coating in the casting forming process, energy conservation, high speed, high efficiency and the like.
The liquid die forging can eliminate the defects of air holes, shrinkage cavities, looseness and the like in the workpiece, generate local plastic deformation and enable the workpiece to have compact tissue. In addition, crystallization under pressure has the functions of obviously refining grains, accelerating solidification speed and homogenizing tissues. The mechanical properties of the liquid forging are thus generally higher than those of a normal casting, close to or even up to the level of forgings of the same alloy, and at the same time it is free of the anisotropy normally present in forgings. The liquid metal is shaped and solidified under pressure to enable the part to be tightly attached to the wall of the cavity. The air gap between the moulds is reduced, so that the heat conductivity coefficient is increased, the solidification speed is accelerated, and the grain refinement is facilitated. And the liquid forging has higher surface finish and dimensional accuracy, and the level of the liquid forging can reach the level of die castings. Therefore, liquid die forging has become an important method of near-net shape forming. In the solidification process of the hydraulic forging, all parts are in a compressive stress state, so that feeding of a workpiece is facilitated, and cracks of the workpiece are prevented. Liquid die forging is performed on a press or a squeeze casting machine. The device is convenient to realize mechanization and automation, can greatly reduce the labor intensity of people, and improves the production environment of workshops. Since the solidified layer is plastically deformed and a part of energy is consumed, the isostatic pressure value to which the molten metal is subjected is not constant but decreases as the solidified layer becomes thicker. The solid-liquid area of the liquid die forging is forced to be fed under the action of pressure. To the utility model discloses liquid die forging can improve the mechanical properties of base member, the density of coating and the interface bonding strength of coating and base member.
III, detection method and calculation method
The utility model discloses the anti abrasion performance of well grate segment directly utilizes the actual consumption rate in the production to detect.
The utility model discloses in "theoretical density of powder that the pressed compact corresponds" can calculate according to formula (1) or (2):
the theoretical density ρ ═ 1/(∑ m) of the powder corresponding to the compacti/ρi) (1)
In the formula (1), ρ is the theoretical density of the powder corresponding to the green compact and has a unit of g/cm3；
miThe mass fraction of element i in the powder mixture (corresponding powder) for the preparation of compacts;
ρithe density of element i in the powder mixture (corresponding powder) for the preparation of compacts is given in g/cm3；
Theoretical density rho ═ Σ V of powder corresponding to green compacti×ρi (2)
In the formula (2), ρ is the theoretical density of the powder corresponding to the green compact and has a unit of g/cm3；
ViThe volume fraction of element i in the powder mixture (corresponding powder) for the preparation of compacts;
ρithe density of element i in the powder mixture (corresponding powder) for the preparation of compacts is given in g/cm3。
Examples
In order to make the present invention easier to understand, the present invention will be described in further detail with reference to the following examples, which are only illustrative and not intended to limit the scope of the present invention. The raw materials or components used in the present invention can be obtained by commercial or conventional methods unless otherwise specified.
Example 1:
(1) preparing 250-mesh C powder and Ti powder according to the atomic ratio of 1: 1, adding 5 wt% of Ni powder (200 meshes) and 5 wt% of Mo powder (200 meshes) of the total weight of the C powder and the Ti powder, and performing ball milling for 8-9 hours to obtain TiCNiMo self-propagating mixed powder;
(2) mixing a proper amount of water glass (20 wt% of the total weight of the TiCNiMo) into the TiCNiMo self-propagating mixed powder for mixing to form a TiCNiMo self-propagating preset coating material;
(3) uniformly coating the TiCNiMo self-propagating preset coating material on the inner surface of the liquid forging die of the fire grate segment, which corresponds to the common abrasion area of the fire grate segment, and forming the TiCNiMo self-propagating preset coating with the thickness of 3 +/-0.2 mm;
(4) for the part with serious abrasion, in order to improve the local abrasion resistance, the part is not coated with the mixed material, the uniformly mixed Ti + C + Ni + Mo powder (namely TiCNiMo self-propagating mixed powder) is cold-pressed into a sheet (pressing sheet) with the thickness of 2 +/-0.2 mm before the molten steel is poured, the density is 60-80 percent of the theoretical density, and the sheet is adhered to the corresponding part of the die forging die (the part of the inner surface of the liquid die forging die of the fire grate sheet, which corresponds to the high abrasion area of the fire grate sheet) by using water glass;
(5) after drying the TiCNiMo self-propagating preset coating, pouring 1Cr18Ni9Ti molten steel into a die according to a conventional liquid die forging process; on the inner surface of the common abrasion area corresponding to the grate segment, 1Cr18Ni9Ti molten steel contacts with TiCNiMo powder in the TiCNiMo self-propagating preset coating to initiate self-propagating reaction to form a TiCNiMo metal ceramic-based composite coating, the molten steel is welded with the corresponding coating, then the molten steel is rapidly pressurized at a pouring riser, the pressure is maintained for 3-5 minutes to perform forging, and the grate segment with the thickness of 2 +/-0.2 mm and the non-high-density TiCNiMo metal ceramic-based composite coating is manufactured on the surface of the common abrasion area after cooling; and (3) contacting the 1Cr18Ni9Ti molten steel with TiCNiMo powder in the TiCNiMo pressed sheet on the inner surface of the high-abrasion area corresponding to the grate segment to initiate a self-propagating reaction to form a TiCNiMo metal ceramic-based composite material coating, welding the molten steel with the corresponding coating, then rapidly pressurizing at a pouring riser, maintaining the pressure for 3-5 minutes to forge, and cooling to prepare the high-density TiCNiMo metal ceramic-based composite material coating with the thickness of 2 +/-0.2 mm on the surface of the high-abrasion area.
The fire grate segment of the garbage incinerator with the high-temperature-resistant and anti-abrasion coating on the surface manufactured by the embodiment is shown in fig. 1, and as can be seen from fig. 1, the fire grate segment of the garbage incinerator with the high-temperature-resistant and anti-abrasion coating on the surface comprises a fire grate segment base body 1, a non-high-density TiCNiMo metal ceramic matrix composite coating 21 coated on the surface of a common abrasion region (fire grate segment flat plate part 11) of the fire grate segment, and a high-density TiCNiMo metal ceramic matrix composite coating 22 coated on the surface of a high abrasion region (fire grate segment front part bent part 12) of the fire grate segment.
The actual consumption rate in production is directly utilized to detect the high-temperature and abrasion resistance of the grate segment of the garbage incinerator with the high-temperature and abrasion resistant coating on the surface in the embodiment, and the result shows that the grate segment in the embodiment has good high-temperature (800-.
Example 2:
(1) preparing 250-mesh C powder and Ti powder according to the atomic ratio of 1: 1, adding 5 wt% of Ni powder (200 meshes) and 5 wt% of Mo powder (200 meshes) of the total weight of the C powder and the Ti powder, and performing ball milling for 8-9 hours to obtain TiCNiMo self-propagating mixed powder;
(2) mixing a proper amount of water glass (15 wt% of the total weight of the TiCNiMo) into the TiCNiMo self-propagating mixed powder for mixing to form a TiCNiMo self-propagating preset coating material;
(3) uniformly coating the TiCNiMo self-propagating preset coating material on the inner surface of the liquid forging die of the fire grate segment, which corresponds to the common abrasion area of the fire grate segment, and forming the TiCNiMo self-propagating preset coating with the thickness of 2 +/-0.2 mm;
(4) for the part with serious abrasion, in order to improve the local abrasion resistance, the part is not coated with the mixed material, the uniformly mixed Ti + C + Ni + Mo powder (namely TiCNiMo self-propagating mixed powder) is cold-pressed into a sheet (pressing sheet) with the thickness of 1 +/-0.2 mm before the molten steel is poured, the density is 60-80 percent of the theoretical density, and the sheet is adhered to the corresponding part of the die forging die (the part of the inner surface of the liquid die forging die of the fire grate sheet, which corresponds to the high abrasion area of the fire grate sheet) by using water glass;
(5) after drying the TiCNiMo self-propagating preset coating, pouring 1Cr18Ni9Ti molten steel into a die according to a conventional liquid die forging process; on the inner surface of the common abrasion area corresponding to the grate segment, 1Cr18Ni9Ti molten steel contacts with TiCNiMo powder in the TiCNiMo self-propagating preset coating to initiate self-propagating reaction to form a TiCNiMo metal ceramic-based composite coating, the molten steel is welded with the corresponding coating, then the molten steel is rapidly pressurized at a pouring riser, the pressure is maintained for 3-5 minutes to perform forging, and the grate segment with the thickness of 1 +/-0.2 mm and the non-high-density TiCNiMo metal ceramic-based composite coating is manufactured on the surface of the common abrasion area after cooling; and (3) contacting the 1Cr18Ni9Ti molten steel with TiCNiMo powder in the TiCNiMo pressed sheet on the inner surface of the high-abrasion area corresponding to the grate segment to initiate a self-propagating reaction to form a TiCNiMo metal ceramic-based composite material coating, welding the molten steel with the corresponding coating, then rapidly pressurizing at a pouring riser, maintaining the pressure for 3-5 minutes to forge, and cooling to prepare the high-density TiCNiMo metal ceramic-based composite material coating with the thickness of 1 +/-0.2 mm on the surface of the high-abrasion area.
The fire grate segment of the garbage incinerator with the high-temperature-resistant and anti-abrasion coating on the surface manufactured by the embodiment is shown in fig. 1, and as can be seen from fig. 1, the fire grate segment of the garbage incinerator with the high-temperature-resistant and anti-abrasion coating on the surface comprises a fire grate segment base body 1, a non-high-density TiCNiMo metal ceramic matrix composite coating 21 coated on the surface of a common abrasion region (fire grate segment flat plate part 11) of the fire grate segment, and a high-density TiCNiMo metal ceramic matrix composite coating 22 coated on the surface of a high abrasion region (fire grate segment front part bent part 12) of the fire grate segment.
The actual consumption rate in production is directly utilized to detect the high-temperature and abrasion resistance of the grate segment of the garbage incinerator with the high-temperature and abrasion resistant coating on the surface in the embodiment, and the result shows that the grate segment in the embodiment has good high-temperature (800-.
It should be noted that the above-mentioned embodiments are only used for explaining the present invention, and do not constitute any limitation to the present invention. The present invention has been described with reference to exemplary embodiments, but the words which have been used herein are words of description and illustration, rather than words of limitation. Modifications may be made to the invention as specified within the scope of the claims and modifications may be made without departing from the scope and spirit of the invention. Although the present invention has been described herein with reference to particular means, materials and embodiments, it is not intended to be limited to the particulars disclosed herein, but rather the present invention extends to all other methods and applications having the same functionality.
Claims (7)
1. A waste incinerator fire grate segment with a high-temperature-resistant and abrasion-resistant coating on the surface comprises a fire grate segment substrate (1), a non-high-density TiCNiMo metal ceramic matrix composite coating (21) coated on the surface of a common abrasion area of the fire grate segment, and a high-density TiCNiMo metal ceramic matrix composite coating (22) coated on the surface of a high abrasion area of the fire grate segment.
2. The fire grate segment of claim 1, wherein the non-highly dense TiCNiMo cermet matrix composite coating (21) is metallurgically bonded to the fire grate segment substrate surface; the high-density TiCNiMo metal ceramic matrix composite coating (22) is metallurgically bonded with the surface of the grate segment substrate.
3. The fire grate segment of claim 1 wherein the high erosion zone is located in the front curved portion (12) of the fire grate segment and the normal erosion zone is located in the flat plate portion (11) of the fire grate segment.
4. The fire grate segment of claim 2 wherein the high erosion zone is located in the front curved portion (12) of the fire grate segment and the normal erosion zone is located in the flat plate portion (11) of the fire grate segment.
5. The fire grate segment of any of claims 1-4, wherein the non-highly dense TiCNiMo cermet matrix composite coating has a thickness of 1-2 ± 0.2 mm; the thickness of the high-density TiCNiMo metal ceramic matrix composite coating is 1-2 +/-0.2 mm.
6. The fire grate segment as claimed in any one of claims 1 to 4, wherein the fire grate segment is made of 1Cr18Ni9 Ti.
7. The fire grate segment of claim 6, wherein the fire grate segment is 1Cr18Ni9 Ti.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022144090.5U CN212273994U (en) | 2020-09-25 | 2020-09-25 | Fire grate segment of garbage incinerator with high-temperature-resistant and abrasion-resistant coating on surface |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022144090.5U CN212273994U (en) | 2020-09-25 | 2020-09-25 | Fire grate segment of garbage incinerator with high-temperature-resistant and abrasion-resistant coating on surface |
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| CN212273994U true CN212273994U (en) | 2021-01-01 |
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| CN202022144090.5U Active CN212273994U (en) | 2020-09-25 | 2020-09-25 | Fire grate segment of garbage incinerator with high-temperature-resistant and abrasion-resistant coating on surface |
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