CN110062815A - The boiler water tube and its manufacturing method of incinerator - Google Patents
The boiler water tube and its manufacturing method of incinerator Download PDFInfo
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- CN110062815A CN110062815A CN201780069554.9A CN201780069554A CN110062815A CN 110062815 A CN110062815 A CN 110062815A CN 201780069554 A CN201780069554 A CN 201780069554A CN 110062815 A CN110062815 A CN 110062815A
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- Prior art keywords
- incinerator
- nickel
- water tube
- spraying plating
- boiler water
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/16—Metallic particles coated with a non-metal
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
- C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/129—Flame spraying
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/10—Water tubes; Accessories therefor
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Sustainable Energy (AREA)
- Sustainable Development (AREA)
- Life Sciences & Earth Sciences (AREA)
- Combustion & Propulsion (AREA)
- Coating By Spraying Or Casting (AREA)
- Powder Metallurgy (AREA)
Abstract
The present invention relates to the long lifetimes of the boiler water tube (heat-transfer pipe) of general incinerator boiler etc..The substrate surface of the boiler water tube of incinerator is coated using spray coating.Spray coating is stacked by flat metallic and is constituted, and tissue made of there is Ni (nickel) to be concentrated in a manner of the gap for filling the metallic.
Description
Technical field
The present invention relates to the long lifetimes of the boiler water tube (heat-transfer pipe) of general incinerator boiler etc..Pass through spraying plating
Improved spraying plating powder, so that substrate surface is coated with the spray coating with high temperature corrosion, in particular with height
Fast flame coating (HVOF spraying plating) forms excellent corrosion resistance in the heat-transfer pipe of incinerator boiler and the surface of water wall pipe
Spray coating.
Background technique
Subtract thick amount to reduce the corrosion of boiler water tube (heat-transfer pipe), realize long lifetime have by by corrosion resistance material
Material is applied to water pipe base material, the surface modified (formation of corrosion resistance spray coating) of water pipe base material, sealing pores, built-up welding come into
The method of row reply.No matter which kind of measure has its merits and demerits, but as the measure in boiler utilization, assigns to water pipe base material
The spray coating for giving corrosion resistant material is effectively, because it is the method that can implement at the scene.However, in the spray of formation
There are stomatas inside plating film, and the stomata is continuous, thus corrosive substance is caused to invade parent material interface, corrode base material, into
And overlay film is constantly peeling-off, so as to cause base material exposing to be exposed to corrosive exhaust.
Water pipe base material
All the time, in the flow path in the stove of incinerator boiler, for the combustion gas flow from stove
In the water pipe base material used, the combustion ash as contained in high temperature corrosion, burning gases (flying dust) and cause occur abrasion subtract thickness,
Therefore, the austenite materials'use of corrosion resistance and excellent in wear resistance is so far.However, since low latitude gas is than caused by operating
Exposure in high temperature reduction flame, the CaSO grey as attachment4, NaCl, KCl, Na, K, Pb in oxide skin (scale) etc.
Metal chloride, sulphate cpd, thus be related to molten salt corrosion etc..Therefore, following countermeasures are implemented: making water pipe (evaporation
Pipe) base material is corrosion resistance and the high material of wear resistance；Or refractory material is implemented to the position after evaporation tube (water pipe) replacement
Construction；Or carry out spraying plating to evaporation tube (water pipe) surface；Etc..For superheater tube, following countermeasures are taken: will be used for pair
Belong to abrasion and subtract the guard member that thick position is protected and is installed on surface；Or the material high using thick-walled pipe, corrosion resistance；Deng
Deng.However, there is the raised trend of first period cost, and in fire proofed wood for the base material for being dedicated to selecting supplying pipe etc.
In material coating there is also initial stage increased costs, ensure heat transfer area and the capacity of boiler entirety caused the initial stages increased costs such as to increase
Worry, it is expected that selecting to design as far as possible easily.
Depositing materials
All the time, as the powder for spraying plating to evaporation tube (water pipe) surface, corrosion resistance and wear-resistant has been used
The granulation agglomerated powder of the cermets systems such as the excellent Ni base self-fluxing alloy of property, Fe base Antaciron based material, chromium carbide, tungsten carbide
End.
For spray coating formation, currently, being densified to the inhibition porosity, realization always including the applicant
It is explored.Currently, the densification in order to realize spray coating, the methods of metallikon, sealing pores nothing more than, actual conditions
Be, such as in boiler, in harsh situation as the corrosive exhaust of waste treating device among boiler water tube in have
There are the depositing materials of superiority, specificity still among developmental research.
Metallikon
There are various modes, spraying platings to be classified according to type for using material, heat source etc. for spraying plating.Made with burning gases
In the spraying plating of heat source, to have gas metal silk spraying plating (gas wire spray), high-speed flame spraying plating, explosion spraying plating etc..With electricity
Be sprayed with arc spraying, plasma spraying, RF plasma spraying, electromagnetism as heat source accelerate plasma spraying, line
Quick-fried spraying plating, electrothermal explosion powder spraying (electrothermally exploded powder spray) etc..In addition, there are also with
Laser spraying plating etc. of the laser as heat source.In these method of spray plating, optimal spray is selected based on depositing materials, execution conditions etc.
Electroplating method.
In incinerator boiler, it is typically chosen the spraying plating of gas metal silk or high-speed flame spraying plating or arc spraying, but
In the Construction practices for having used previous depositing materials, although also depending on use environment, it is based on the spraying plating of gas metal silk, electric arc
The durable years of the spray coating of spraying plating is 2~3 years or so.In addition, in previous high-speed flame spraying plating, improve particle rapidity with
Seek the densification of overlay film, but the durable years of spray coating is 3~5 years or so in Construction practices, consider facility uses year
When number, the corrosion resistance of overlay film is insufficient.
Melt process (fusing treatment)
As the sealing pores based on self-fluxing alloy, have temporarily makes overlay film melt and make after the construction in spray coating
Stomata disappears come the method for improving the corrosion resistance of overlay film.But due to using electric furnace (referring to patent in implementing melt process
Document 1), high-frequency induction heating (referring to patent document 2) etc., therefore, it is necessary in shop, can not scene carry out repairing and apply
Therefore work can not select melt process for the long lifetime of the facility in operating.
As the sealing pores based on Al spraying plating, has and formed by the way that Al spraying plating will be melted in using common flame coating etc.
Overlay film on carry out the methods of obstructing air holes.But have confirmed that the Al layer of poor corrosion resistance disappeared through 2 years or so, lose sealing of hole
Function.In addition, it is necessary to which the Ni based alloy and sealing material of substrate are divided into 2 spraying platings, labour is spent.Facility in operation
In long lifetime countermeasure, due to spending labour as permanent worker's journey and compared with manually number more increases for fee of material etc., because
This not can avoid high cost, in addition be difficult to select such spray for the reparation construction etc. in during limited facility stops
It plates (referring to non-patent literature 1).
As other sealing of hole spraying platings, there is the technology for sealed porosity and with vitreous material Composite.But real machine pot
In furnace, other than starting and stopping, also because being used for except the temperature variation of influence and operating of the soot blowing of attachment removal ash etc. etc. is each
Kind of factor and cause to generate thermal stress in spray coating.Therefore, by thermal expansion coefficient different material Composite the case where
Under, cause a possibility that rupturing, removing high in operation, can not expect sufficient durability, it is difficult to such spraying plating be selected (to join
See patent document 3).
Built-up welding
For built-up welding, due to having no through stomata, thus excellent corrosion resistance and thickness can be obtained, therefore be expected to
Method as long lifetime.But the excessive heat input of man-hour requirement is being applied in order to be welded, accordingly, there exist right
In base material generate heat affecting the case where, occur base material deformation situations such as.In addition, though can field patch, but be only limitted to office
The repairing in portion is constructed very time consuming on a large scale, and therefore, artificial number increases and not can avoid high cost, and for having
It is difficult to select such welding for reparation construction in during the facility stopping of limit etc..
Existing technical literature
Patent document
Patent document 1: Japanese Unexamined Patent Publication 8-13119 bulletin
Patent document 2: Japanese Unexamined Patent Publication 10-46315 bulletin
Patent document 3: Japanese Unexamined Patent Publication 2001-192802 bulletin
Non-patent literature
Non-patent literature 1: the former hero three in river, " application of the high temperature corrosion coating of waste electricity generation boiler and durability evaluation
Status " (" one テ イ Application グ of Abolished Qi Wu development electricity ボ イ ラ To お け Ru high temperature saprophage U is applicable in と durability and comments value status),
Spraying plating, volume 38 No. 2, page 73 (2001)
Summary of the invention
Problems to be solved by the invention
When using resistant material in water pipe base material, significant cost is caused to increase, there is also after operating for the countermeasure
Facility in the aspect that is difficult to cope with (it is unpractical that tube drawing repairing is integrally carried out to the part).On the other hand, even if implementing
Impose that castable construction, surface imposes makes all the time for evaporation tube (water pipe) for the position after evaporation tube (water pipe) replacement
The countermeasures such as spraying plating, the long lifetime being consistent with cost are also difficult.
In common spraying plating process, only it is difficult to fully remove stomata by improving particle rapidity.In addition, using Ni-Cr
When based powdered material, for grain circle of the overlay film tissue after film forming, heat affecting when due to spraying plating and the composition for leading to Cr
Ratio increases, the corrosion resistance of overlay film is low in boiler environment in waste incinerator, therefore leads to the erosion on boundary, to the longevity of overlay film
Life causes adverse effect.
Self-fluxing alloy is the method for being expected to that stomata is made to disappear, but can not be constructed at the scene, therefore be not used to repair
Mend etc..
For spraying plating compound for Al sealing pores etc., since technique becomes complicated, cost is caused to increase.With glass
The Composite of matter etc. due to overlay film itself poor reliability and be not suitable for using at the high position of thermal stress.Built-up welding compared with spraying plating and
Speech has many advantages, such as, but there are problems that application property, repairing situation at high cost.
The present invention is to complete in view of the above problems, it is intended that providing can be by the complication of cost increase, technique
It controls as minimum limit and realizes the long lifetime of boiler water tube and can be realized the repairing of site operation and scene, by
This LCC (life cycle cost) the excellent spray coating for being able to carry out field patch.
That is, the object of the present invention is to provide can reduce corrosion subtract thick amount, realize long lifetime, be coated with spraying plating
The boiler water tube and its manufacturing method of the incinerator of overlay film.
Means for solving the problems
To achieve the goals above, one embodiment of the present invention is that the surface of substrate is burnt with the waste that spray coating is coated
Burn the boiler water tube of furnace, which is characterized in that the spray coating is stacked by flat metallic and constituted, and has Ni
Tissue made of (nickel) is concentrated in a manner of the gap for filling the metallic.
Preferred embodiment of the invention is characterized in that the metallic is using Ni (nickel) as principal component and to contain Cr
Ni (nickel) based alloy of (chromium), B (boron), Si (silicon), Mo (molybdenum) and Cu (copper).Preferred embodiment of the invention is characterized in that, institute
The porosity of spray coating is stated less than 1%.
Preferred embodiment of the invention is characterized in that, the spray coating with a thickness of 100 μm or more and 1000 μm or less.
Other modes of the invention are the manufacturing method of the boiler water tube of incinerator, wherein to the surface of substrate
The coating process based on spraying plating is imposed, the manufacturing method of the boiler water tube of the incinerator is characterized in that, the spray
It is plated with and spraying plating powder made of Ni (nickel) coating treatment is carried out as material to the respective surface of metallic, carry out the Ni
The fusing point of the metallic of (nickel) coating treatment is higher than the fusing point for covering Ni (nickel) film of the metallic.
Preferred embodiment of the invention is characterized in that Ni (nickel) coating treatment is electroless Ni (nickel)-P (phosphorus) plating
Processing.
Preferred embodiment of the invention is characterized in that, is formed by Ni (nickel) film by the Ni (nickel) coating treatment
P (phosphorus) containing 5~10 mass %.
Preferred embodiment of the invention is characterized in that the metallic is using Ni (nickel) as principal component and to contain Cr
Ni (nickel) based alloy of (chromium), B (boron), Si (silicon), Mo (molybdenum) and Cu (copper).
Preferred embodiment of the invention is characterized in that the spraying plating is high-speed flame metallikon.
Preferred embodiment of the invention is characterized in that, after the spraying plating, does not implement melt process.
The present invention is to utilize that highly corrosion resistant material is made to concentrate in the spray coating between particle and improving compactness to surface
The boiler water tube for carrying out incinerator made of being coated, is manufactured by spraying plating dusty material, the spraying plating powder material
The metal that material is high using corrosion resistance and fusing point is lower than the spraying plating dusty material for becoming basis has carried out coating treatment.Common spray
In the case where plating film, corrosive substance invades inside overlay film from external interparticle grain circle through more than stomata, overlay film
Erosion progress.In the present invention, concentration has highly corrosion resistant material between particles, and therefore, the progress of corrosion is hindered, corrosion resistance
It improves.Also, using common dusty material and by high-speed flame spraying plating to form spray coating, spraying plating is covered
The porosity of film is 6% or so.In the present invention, make interparticle stomata using the melting of the surface Ni coating of low melting point
Rate is reduced.The result of measurement is the porosity less than 1%.By said effect, the corrosion resistance of spray coating entirety is improved, and
It is especially excellent in terms of preventing from being etched inside overlay film along interparticle grain circle, previous spray coating and pot can be reached
The long lifetime of the about 2 times or more of furnace water pipe.
In order to realize site operation and repairing, the method for spray plating in construction at the scene with practice is used all the time,
The porosity is improved by improving spraying plating raw material simultaneously, to improve the corrosion resistance of spray coating.According to the present invention, in order to anti-
Only grain circle inside overlay film along previous depositing materials, that is, Ni-Cr based powders particle is etched, and is imposed to depositing materials powder
The high metal deposition of corrosion resistance handles the densification to realize spray coating, is improved particularly the corrosion resistance on boundary, Neng Goushi
Existing of 2 times or more long lifetimes.
Invention effect
According to the present invention, by making spray coating be formed in the water pipe of boiler, it can be improved the resistance to of the water pipe base material of boiler
Corrosivity can be realized the economic effect of the repairing of long lifetime bring or update etc..In addition, by being applied to spraying plating powder raw material
With Ni coating treatment, for carrying out coating processing after spray coating is constructed, the paintability in interparticle grain circle portion is high,
The erosion resisting in grain portion, circle inside spray coating until significantly improve.
In addition, being handled by imposing the fusing point metal deposition lower than previous spraying plating powder raw material, powder surface becomes to hold
Easily melting.Make its stacking and to water tube surfaces to blow and spray the molten particles at a high speed, thus overlay film tissue as compared with the past and
Further densification, the porosity become smaller speech.In addition, for grain circle of the overlay film tissue after film forming, due to by plating
It manages and the composition ratio of the Ni of excellent corrosion resistance in boiler environment in waste incinerator is improved, therefore, compared with
For previous overlay film tissue, has the effect for preventing being etched inside overlay film along grain circle.By above-mentioned improvement, it is capable of forming
(it is the important topic as spraying plating dusty material, for improving grain circle corrosion inhibition effects), the cause that the porosity is lowered by
The high spray coating of close property.
By combining spraying plating dusty material with high-speed flame method of spray plating, spraying plating powder raw material is capable of forming further reality
The spray coating of existing compactness.The porosity of previous spray coating is about 6% or so, the gas of spray coating of the present invention
Porosity successfully improves to less than 1%.The porosity reduces the spray coating for being shown to be and realizing compactness raising.In addition, high speed
Flame coating overlay film and the fusion character of water pipe base material are also excellent, become Shi Li circle, the spray coating that grain interface ad infinitum reduces,
Make the spray coating of excellent corrosion resistance as by improving compactness, is to have to cover the spraying plating of long lifetime as compared with the past
The spray coating of the superiority of 2 times or more is improved for film.
To there is the spraying plating dusty material of specificity to combine with high-speed flame spraying plating, and do not depend on previous melt process side
Method simplifies work progress as much as possible, while being capable of forming the spray coating with corrosion resistance for realizing that compactness improves.Separately
Outside, needless to say, this technique can be used for shop, and in facility in operation, can also be not limited to the previous construction time
Between, cost and actually use.
Detailed description of the invention
[Fig. 1] is the schematic diagram indicated for implementing the coating apparatus of high-speed flame spraying plating.
[Fig. 2A] Fig. 2A is the figure for indicating the result of the porosity of measurement current material and new material.
[Fig. 2 B] Fig. 2 B is the schematic diagram of Fig. 2A.
[Fig. 3] is the figure for indicating the spraying plating water pipe panel (panel) constructed in real gas exposure test.
[Fig. 4] is the figure for indicating the spray coating measurement result in real gas exposure test.
[Fig. 5] is the figure for indicating the experimental rig for implementing high temperature corrosion test.
[Fig. 6] is to indicate that the spray coating of high temperature corrosion test subtracts the figure of the result of thick amount.
[Fig. 7 A] Fig. 7 A is the figure for indicating the cross-section observation result of high temperature corrosion test of test film A.
[Fig. 7 B] Fig. 7 B is the schematic diagram of Fig. 7 A.
[Fig. 8 A] Fig. 8 A is the figure for indicating the cross-section observation result of high temperature corrosion test of test film B.
[Fig. 8 B] Fig. 8 B is the schematic diagram of Fig. 8 A.
[Fig. 9 A] Fig. 9 A is the figure for indicating the cross-section observation result of high temperature corrosion test of test film C.
[Fig. 9 B] Fig. 9 B is the schematic diagram of Fig. 9 A.
[Figure 10 A] Figure 10 A is the figure for indicating the Ni concentration mensuration result of current material.
[Figure 10 B] Figure 10 B is the enlarged diagram of the major part of Figure 10 A.
[Figure 11 A] Figure 11 A is the figure for indicating the Ni concentration mensuration result of new material.
[Figure 11 B] Figure 11 B is the enlarged diagram of the major part of Figure 11 A.
[Figure 12 A] Figure 12 A is the figure for indicating the EPMA analysis result of current material.
[Figure 12 B] Figure 12 B is the schematic diagram for indicating the image (K, Na, Pb, C1) of other compositions of Figure 12 A.
[Figure 13 A] Figure 13 A is the figure for indicating the EPMA analysis result of new material.
[Figure 13 B] Figure 13 B is the schematic diagram for indicating the image (K, Na, Pb, Cl) of other compositions of Figure 13 A.
Specific embodiment
As best mode for carrying out the present invention, previous spraying plating dusty material is applied using electroless Ni-P plating
Be with plating it is best, in turn, 200 μm or more of uniform overlay film is formed and using the construction of high-speed flame spraying plating
It is best embodiment.
Invention of the present embodiment is to give up made of being coated using surface of the spray coating to base material (substrate)
The boiler water tube of gurry incinerator.Spray coating is stacked by flat metallic and is constituted, and has Ni (nickel) to fill
Tissue made of the mode in the gap of the metallic is concentrated.It is organized made of so-called Ni concentration, refers to that the concentration of Ni is higher than structure
At the tissue of the metallic around spray coating, preferably group of the concentration of Ni higher than 10 mass % of metallic or more
It knits.Additionally, it is preferred that being the tissue of the Ni containing 80 mass % or more.
In addition, invention of the present embodiment is to impose the coating process based on spraying plating to the surface of base material (substrate)
The manufacturing method of the boiler water tube of incinerator.In spraying plating, to impose Ni coating treatment to the respective surface of metallic
Made of spraying plating powder as material.The fusing point for carrying out the metallic of aforementioned Ni (nickel) coating treatment is higher than covering aforementioned metal
The fusing point of Ni (nickel) film of particle.
According to the present embodiment, by making spray coating be formed in the water pipe of boiler, it can be improved the base material of boiler water tube
Corrosion resistance, can be realized long lifetime bring repairing or update etc. economic effect.In addition, by former to spraying plating powder
Material imposes Ni coating treatment (more specifically, electroless Ni-P plating), is coated compared with after spray coating is constructed
For processing, the paintability height in interparticle grain circle portion, the erosion resisting in grain circle portion significantly improve inside spray coating.
It is formed by the P (phosphorus) that Ni film contains 5~10 mass % by Ni coating treatment, carries out Ni coating treatment
The fusing point of metallic is higher than the fusing point for covering the Ni film of these metallics.For example, metallic is with Ni (nickel) work
For principal component and containing the Ni based alloy of Cr (chromium), the more preferably also Ni containing B (boron), Si (silicon), Mo (molybdenum) and Cu (copper)
Based alloy.Preferably, Ni based alloy contains 5 mass % or more and 15 mass % Cr below, and containing 30 mass % with
Upper and 75 mass % Ni below.
By imposing the plating of the fusing point metal lower than the raw material to previous spraying plating powder raw material, powder surface becomes
It must be easy melting.Make its stacking and to water tube surfaces to blow and spray the molten particles at a high speed, thus overlay film group as compared with the past
For knitting, overlay film is further densified, and the porosity becomes smaller.In addition, for grain circle of the overlay film tissue after film forming, due to logical
It crosses plating and the composition ratio of the Ni of excellent corrosion resistance in boiler environment in waste incinerator is improved, because
This, for overlay film tissue as compared with the past, has the effect for preventing being etched inside overlay film along grain circle.By above-mentioned improvement,
Be capable of forming that the porosity is lowered by (it is the important topic as spraying plating dusty material, is inhibited for improving grain circle and corroding
Effect), the high spray coating of compactness.
In order to form spray coating to the surface of base material to blow and spray spraying plating dusty material at a high speed, in present embodiment, benefit
The spray coating formed with high-speed flame (HVOF) spraying plating, formation by the spraying plating dusty material after imposing Ni coating treatment.Spraying plating
The overlay film the thick, and overlay film itself subtracts the risk that the thick service life extends, but ruptures if blocked up for corrosion and rises, and therefore, the upper limit is
1000μm.On the other hand, environmental barrier function reduces if excessively thin, and the service life for subtracting thickness for corrosion shortens, therefore preferably
It is 100 μm or more, more preferably 200 μm or more and 1000 μm or less.High-speed flame spraying plating is following methods: by improving spraying plating
The pressure of combustion chamber in device is to generate the high-speed flame to compare favourably with explosive combustion flame, to the combustion flame jet stream
Central supply dusty material simultaneously becomes melting or semi-molten state, with the spraying plating side of the high continuous pulverized powder material of speed
Method.
Fig. 1 is the schematic diagram indicated for implementing the coating apparatus of high-speed flame spraying plating.As shown in Figure 1, fuel (such as coal
Oil) and oxygen the combustion chamber in the main body 15 of coating apparatus is respectively fed to by fuel inlet 11 and oxygen inlet 12
10.The mixture formed by fuel and oxygen is lighted using spark plug 13, the burning gases generated as its result are in main body
15 inside becomes high-speed gas.Dusty material after imposing Ni coating treatment is supplied from material input port 14 to main body 15,
And it is heated and accelerates.In this way, the dusty material for becoming the flight particle of high speed is blowed and sprayed to the surface of base material, on base material
Form spray coating.Cooling water from cooling water inlet 16 inject, from cooling water outlet 17 be discharged, therefore, main body 15 it is interior
Portion is cooled down.
In present embodiment, after spraying plating, do not implement melt process.It is therefore not necessary to using electric furnace, high-frequency induction heating, energy
It is enough easily to carry out reparation construction at the scene.
By combining spraying plating dusty material of the present embodiment with high-speed flame method of spray plating, spraying plating powder raw material
It is capable of forming the spray coating for further realizing compactness.Fig. 2 shows the porositys of measurement current material and new material
As a result.Fig. 2A is the figure for indicating the result of the porosity of measurement current material and new material, and Fig. 2 B is the schematic diagram of Fig. 2A.Figure
Stain shown in the upper figure of 2B indicates the stomata formed in spray coating.The porosity of previous spray coating is about 6%
Left and right, the porosity of spray coating of the present embodiment successfully improve to less than 1%.The porosity can by utilize light
Learn that the image that micro- sem observation obtains carries out binary conversion treatment, measurement black region accounts for the area of whole ratio and calculates.Gas
Porosity, which reduces, indicates it is to realize the spray coating for improving compactness.In addition, high-speed flame spray coating is for water pipe base material
Fusion character is also excellent, becomes the spray coating of Shi Li circle, the ad infinitum reduction of grain interface, makes corrosion resistant as by improving compactness
The excellent spray coating of corrosion is with will improve the superiority of 2 times or more for long lifetime spray coating as compared with the past
Spray coating.
According to the present embodiment, will there is the spraying plating dusty material of specificity to combine with high-speed flame spraying plating, and does not depend on
Previous melting process for the treatment of, as much as possible simplify work progress, while be capable of forming realize compactness improve have corrosion resistant
The spray coating of corrosion.In addition, needless to say, this technique can be used for shop, and can not also in facility in operation
Arrest in previous construction period, cost and actually use.
[embodiment 1] Field Exposure
Fig. 3 is the figure for indicating the spraying plating water pipe panel constructed in real gas exposure test.Fig. 4 is to indicate that real gas is sudden and violent
The figure of spray coating measurement result in dew test.The position shown in (1) and (2) of Fig. 3 is formed with the base as comparative example
In the spray coating of current material, the position shown in (3) and (4) of Fig. 3 is formed with based on of the present embodiment novel
The spray coating of material.As current material, Ni based alloy (Ni-15Cr-4B-4Si-3Mo-3Cu) powder has been used.As new
Profile material has used and has carried out powder made of the electroless plating of Ni-P to Ni based alloy (Ni-15Cr-4B-4Si-3Mo-3Cu)
End.As metallikon, high-speed flame metallikon is used.
Spraying plating water pipe panel shown in Fig. 3 is set to the water pipe in actual boiler stove, is based on the spray of (1)~(4)
The real gas exposure test of plating film is implemented 5 years pass through and is observed.As shown in figure 4, the spray based on real gas exposure test
Plating film measurement result, confirms, and the spray coating of new material ensures the residual compared with 2 times or more for current material
Overlay film, corrosion resistance excellent in te pins of durability.
That is, the film thickness of the spray coating of new material when on-test is about 400 μm, start test certainly after 5 years
The film thickness of spray coating of new material at time point be about 310~340 μm.In contrast, existing material when on-test
The film thickness of the spray coating of material is about 420 μm, starts the spray coating for testing the current material at the time point after 5 years certainly
Film thickness is about 150 μm.In this way, as shown in Figure 4, for the spray coating of current material, the spray coating of new material
With excellent corrosion resistance durability.
[embodiment 2] high temperature corrosion test
Bury high temperature corrosion test method according to the salt dipping and salt of the metal material in JIS standard " JISZ2293 ",
Implement high temperature corrosion test in tube furnace.Table 1 is the table for indicating the experimental condition of high temperature corrosion test.
[table 1]
Based on high temperature corrosion experimental condition shown in table 1, pass through high temperature corrosion test side using experimental rig shown in fig. 5
Method implements test.The details of the experimental rig of Fig. 5 describe later.To the test film of the S25C (carbon steel) as base material
(20mm × 20mm × 10mm (thickness)) difference spraying plating current material and new material, are tried thus obtained substance as test
Sample.As comparison other, same test is also implemented to S25C base material.Test temperature is respectively 300 DEG C, 345 DEG C, 400 DEG C.
Under above-mentioned test temperature, implement the test of high temperature corrosion in 300 hours respectively.It should be noted that using synthesis for ash
Ash simultaneously melts it temporarily in high temperature, is then pulverized and mixed, using thus obtained substance as test ash.Ash fusion point be
350 DEG C or so.
Fig. 5 is the figure for indicating the experimental rig for implementing high temperature corrosion test.As shown in figure 5, being configured in electric furnace 1
Ceramic boat 2 is configured with crucible 3 on the ceramics boat 2.Crucible 3 loads fuse salt 4, and test film 5 is buried in the fuse salt
In 4.Atmosphere gas towards Fig. 5 arrow direction and flow.Symbol T in Fig. 5 indicates furnace atmosphere temperature measuring thermocouple,
Temperature in electric furnace 1 is measured using thermocouple T.Symbol TTPIndicate test film temperature measuring thermocouple, the temperature of test film 5
Utilize thermocouple TTPMeasurement.The center portion of electric furnace 1 is provided with electric furnace control thermocouple TC.The temperature of electric furnace 1 is controlled,
So that the temperature difference of electric furnace 1 is within ± 3 DEG C in the range of the 100mm away from the center of electric furnace 1.The earthenware buried for test film 5
Crucible 3 configures in the range of the 100mm away from the center of electric furnace 1.
The test result of high temperature corrosion test is shown in table 2.As shown in table 2, under conditions of 300 DEG C, 345 DEG C, any material
Material does not change significantly.Under conditions of 400 DEG C, significant difference, the corrosion of new material are observed in visual confirmation
Situation is most slight.It is thus identified that being significantly larger than the corrosion resistance of current material to the corrosion resistance of new material.
[table 2]
As shown in table 2, test film A significantly corrodes, and base material is exposed due to corrosion.Similarly, test film C is also significantly
Corrosion.In contrast, the extent of corrosion of test film B is slight, only the outermost surface layer corrosion of spray coating.
Fig. 6 is to indicate that the spray coating of high temperature corrosion test subtracts the figure of the result of thick amount.Fig. 7 A and Fig. 8 A are to respectively indicate
The figure of the cross-section observation result of the high temperature corrosion test of test film A and B.Fig. 7 B is the schematic diagram of Fig. 7 A, and Fig. 8 B is showing for Fig. 8 A
It is intended to.As shown in Fig. 7 (Fig. 7 A and Fig. 7 B) and Fig. 8 (Fig. 8 A and Fig. 8 B), it is known that under conditions of water tube surfaces temperature is 400 DEG C
In test film A (current material), it is significant for reaching the corrosion of base material, and test film B (new material) terminates in only spray coating
The corrosion on outermost surface layer.Fig. 9 A is the figure for indicating the cross-section observation result of high temperature corrosion test of test film C, and Fig. 9 B is Fig. 9 A's
Schematic diagram.As shown in Fig. 9 (Fig. 9 A and Fig. 9 B), it is known that water tube surfaces temperature is the test film C's (base material) under conditions of 400 DEG C
Corrosion is significant.
Table 3 is the table for indicating the fusing point of spraying plating dusty material.As shown in table 3, electroless Ni-P is imposed to current material to plate
The concentration for covering the P (phosphorus) in the spraying plating dusty material that processing obtains is preferably 5~10%, and the concentration of further preferred P is 8%.
The fusing point for not imposing the current material of electroless Ni-P plating is 980 DEG C or more, the spraying plating powder when concentration of P is 8%
The fusing point of material is 890 DEG C, and the fusing point of the spraying plating dusty material when concentration of P is 10% is 850 DEG C, when the concentration of P is 5%
The fusing point of spraying plating dusty material is 950 DEG C.Fusing point increases if the concentration of P (phosphorus) is too low, therefore, the surface of spraying plating dusty material
Become to be not easy to melt, adverse effect is caused to the densification of overlay film.On the other hand, fusing point declines if the excessive concentration of P (phosphorus),
Therefore, the excessive surface of spraying plating dusty material melts and causes expulsion events (spitting phenomenon), becomes easy
Defect is generated on overlay film.Herein, so-called expulsion events refer to that the spraying plating dusty material excessively melted is piled up in coating apparatus (ginseng
See Fig. 1) inner wall, deposit the phenomenon that falling off from nozzle and being mixed into overlay film.
[table 3]
Figure 10 indicates the Ni concentration mensuration of current material as a result, Figure 11 indicates the Ni concentration mensuration result of new material.Figure
10A is the figure for indicating the Ni concentration mensuration result of current material, and Figure 10 B is the enlarged diagram of the major part of Figure 10 A.Figure
11A is the figure for indicating the Ni concentration mensuration result of new material, and Figure 11 B is the enlarged diagram of the major part of Figure 11 A.Figure
In 10B and Figure 11 B, metallic (spraying plating particle) indicates that grain circle is present in metallic with the white area drawn with curve
Between (spraying plating particle).According to Figure 10 A, the Ni concentration of intragranular and grain circle is 60 mass % or so.As shown in Figure 10 B, grain circle
In, Ni (nickel) is not concentrated, and the tissue of the Ni at grain circle place is not formed in such a way that the gap for filling metallic is filled.Another party
Face, by Figure 11 (Figure 11 A and Figure 11 B) it is found that in new material, the Ni concentration of intragranular is 60 mass % or so, and the Ni of grain circle
Concentration is 80 mass % or more, tissue shape in a manner of filling the gap of flat metallic made of Ni (nickel) concentration
At.It is organized made of so-called Ni concentration, refers to that the concentration of Ni is higher than the tissue for constituting the metallic around spray coating, it is excellent
The concentration for being selected as Ni is higher than the tissue of 10 mass % of metallic or more.80 mass % or more are preferably comprised in addition, also knowing
The tissue of Ni.In this way, group made of there is interparticle grain circle concentration of the Ni along composition overlay film can be obtained according to new material
Overlay film knit, fine and close.
Figure 12 and Figure 13 is the EPMA analysis of the overlay film tissue after the high temperature corrosion test indicated when measuring temperature is 400 DEG C
As a result figure.More specifically, Figure 12 A is the figure for indicating the EPMA analysis result of current material, and Figure 12 B is to indicate Figure 12 A
The schematic diagram of the image (K, Na, Pb, Cl) of other compositions.Figure 13 A is the figure for indicating the EPMA analysis result of new material, figure
13B is the schematic diagram for indicating the image (K, Na, Pb, C1) of other compositions of Figure 13 A.EPMA (electron probe microanalyzer,
Electron Probe Micro Analyzer) it is the characteristic generated to the surface of substance irradiation electron ray, measurement from substance
X-ray, the device that the constitution element of the substance is analyzed.By using EPMA, the surface for being formed in base material can determine
Spray coating constitution element, and then the ratio (concentration) of the constitution element of spray coating can be analyzed.
In Figure 12 B and Figure 13 B, the constitution element of each spray coating of the image (K, Na, Pb, Cl) of other compositions is with black
Region indicates that the region of adjacent downside indicates inside overlay film with black region.Based on Figure 12 (Figure 12 A and Figure 12 B) and Figure 13
(Figure 13 A and Figure 13 B) mutually compares the image (K, Na, Pb, Cl) of other compositions it is found that the spraying plating using current material is covered
In film, corrosion composition is infiltrated into inside overlay film, and on the other hand, using in the spray coating of new material, corrosion composition does not permeate
To overlay film.In this way, for compared with the spray coating for using current material, it is useless in simulation using the spray coating of new material
The corrosion resistance under high-temperature corrosion environment in gurry incinerator is especially excellent.
The explanation that the preferred embodiment of the present invention has been carried out above, but the present invention is not limited to above-mentioned embodiment,
Needless to say, can implement in a variety of ways within the scope of its technical ideas.
Industrial availability
The present invention relates to the long lifetimes of the boiler water tube (heat-transfer pipe) of general incinerator boiler etc..
Description of symbols
1 electric furnace,
2 ceramic boats,
3 crucibles,
4 fuse salts,
5 test films,
10 combustion chambers,
11 fuel inlets,
12 oxygen inlets,
13 spark plugs,
14 material input ports,
15 main bodys,
16 cooling water inlets,
17 cooling water outlets.
Claims (10)
1. the boiler water tube of incinerator is the boiler for the incinerator that the surface of substrate is coated with spray coating
The boiler water tube of water pipe, the incinerator is characterized in that,
The spray coating is stacked by flat metallic and is constituted, and has Ni (nickel) to fill the metallic
Tissue made of the mode in gap is concentrated.
2. the boiler water tube of incinerator as described in claim 1, which is characterized in that the metallic is with Ni
Ni (nickel) based alloy of (nickel) as principal component and containing Cr (chromium), B (boron), Si (silicon), Mo (molybdenum) and Cu (copper).
3. the boiler water tube of incinerator as claimed in claim 1 or 2, which is characterized in that the gas of the spray coating
Porosity is less than 1%.
4. the boiler water tube of incinerator according to any one of claims 1 to 3, which is characterized in that the spraying plating
Overlay film with a thickness of 100 μm or more and 1000 μm or less.
5. the manufacturing method of the boiler water tube of incinerator, wherein impose the coating work based on spraying plating to the surface of substrate
The manufacturing method of sequence, the boiler water tube of the incinerator is characterized in that,
The spraying plating to carry out spraying plating powder made of Ni (nickel) coating treatment as material to the respective surface of metallic, into
The fusing point of the metallic of row Ni (nickel) coating treatment is higher than the fusing point for covering Ni (nickel) film of the metallic.
6. the manufacturing method of the boiler water tube of incinerator as claimed in claim 5, which is characterized in that the Ni (nickel)
Coating treatment is electroless Ni (nickel)-P (phosphorus) plating.
7. the manufacturing method of the boiler water tube of incinerator as claimed in claim 6, which is characterized in that pass through the Ni
(nickel) coating treatment is formed by the P (phosphorus) that Ni (nickel) film contains 5~10 mass %.
8. the manufacturing method of the boiler water tube of incinerator as claimed in claims 6 or 7, which is characterized in that the gold
Belonging to particle is Ni (nickel) base using Ni (nickel) as principal component and containing Cr (chromium), B (boron), Si (silicon), Mo (molybdenum) and Cu (copper)
Alloy.
9. the manufacturing method of the boiler water tube of the incinerator as described in any one of claim 6~8, feature exist
In the spraying plating is high-speed flame metallikon.
10. the manufacturing method of the boiler water tube of the incinerator as described in any one of claim 6~9, feature exist
In not implementing melt process after the spraying plating.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016219773A JP6802042B2 (en) | 2016-11-10 | 2016-11-10 | Boiler water pipe of waste incinerator and its manufacturing method |
| JP2016-219773 | 2016-11-10 | ||
| PCT/JP2017/038954 WO2018088251A1 (en) | 2016-11-10 | 2017-10-27 | Boiler water pipe for waste incinerator and production method therefor |
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| Publication Number | Publication Date |
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| CN110062815A true CN110062815A (en) | 2019-07-26 |
| CN110062815B CN110062815B (en) | 2022-06-28 |
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| CN201780069554.9A Active CN110062815B (en) | 2016-11-10 | 2017-10-27 | Boiler water pipe of waste incinerator and manufacturing method thereof |
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| Country | Link |
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| JP (1) | JP6802042B2 (en) |
| CN (1) | CN110062815B (en) |
| TW (1) | TWI749097B (en) |
| WO (1) | WO2018088251A1 (en) |
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| JP7044328B2 (en) * | 2018-06-01 | 2022-03-30 | 株式会社荏原製作所 | A method for producing a Ni—Fe-based alloy powder and an alloy film using the Ni—Fe-based alloy powder. |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5956572U (en) * | 1982-10-06 | 1984-04-13 | 日本電気株式会社 | current detection device |
| JPH059699A (en) * | 1991-07-08 | 1993-01-19 | Kawasaki Steel Corp | Conductor roll for electroplating line and production thereof |
| JP2008115443A (en) * | 2006-11-07 | 2008-05-22 | Sumitomo Metal Mining Co Ltd | Ni-BASED SELF-FLUXING ALLOY POWDER FOR THERMAL SPRAYING, ITS PRODUCTION METHOD, AND SELF-FLUXING ALLOY SPRAYED COATING OBTAINED USING THE POWDER |
| JP2009221602A (en) * | 2008-02-18 | 2009-10-01 | Tohoku Electric Power Engineering & Construction Co Ltd | Wire for thermal spray |
| CN101914766A (en) * | 2010-07-19 | 2010-12-15 | 华北电力大学 | Double powder core wire for preparing high temperature chlorine corrosion resistant cladding layer on outside surface of boiler tube |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5956572A (en) * | 1982-09-27 | 1984-04-02 | Mitsubishi Heavy Ind Ltd | Surface treatment by molybdenum |
| CN103160827B (en) * | 2013-04-11 | 2016-09-21 | 中国船舶重工集团公司第七�三研究所 | A kind of waste heat boiler heating surface high temperature composite anti-wear coating and preparation method thereof |
-
2016
- 2016-11-10 JP JP2016219773A patent/JP6802042B2/en active Active
-
2017
- 2017-10-27 CN CN201780069554.9A patent/CN110062815B/en active Active
- 2017-10-27 WO PCT/JP2017/038954 patent/WO2018088251A1/en active Application Filing
- 2017-11-07 TW TW106138430A patent/TWI749097B/en active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5956572U (en) * | 1982-10-06 | 1984-04-13 | 日本電気株式会社 | current detection device |
| JPH059699A (en) * | 1991-07-08 | 1993-01-19 | Kawasaki Steel Corp | Conductor roll for electroplating line and production thereof |
| JP2008115443A (en) * | 2006-11-07 | 2008-05-22 | Sumitomo Metal Mining Co Ltd | Ni-BASED SELF-FLUXING ALLOY POWDER FOR THERMAL SPRAYING, ITS PRODUCTION METHOD, AND SELF-FLUXING ALLOY SPRAYED COATING OBTAINED USING THE POWDER |
| JP2009221602A (en) * | 2008-02-18 | 2009-10-01 | Tohoku Electric Power Engineering & Construction Co Ltd | Wire for thermal spray |
| CN101914766A (en) * | 2010-07-19 | 2010-12-15 | 华北电力大学 | Double powder core wire for preparing high temperature chlorine corrosion resistant cladding layer on outside surface of boiler tube |
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| WO2018088251A1 (en) | 2018-05-17 |
| JP6802042B2 (en) | 2020-12-16 |
| JP2018076564A (en) | 2018-05-17 |
| TWI749097B (en) | 2021-12-11 |
| TW201829807A (en) | 2018-08-16 |
| CN110062815B (en) | 2022-06-28 |
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