CN108842126A - A kind of metal-cermic coating continuous casting crystallizer copper pipe and preparation method thereof - Google Patents
A kind of metal-cermic coating continuous casting crystallizer copper pipe and preparation method thereof Download PDFInfo
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- CN108842126A CN108842126A CN201810756842.8A CN201810756842A CN108842126A CN 108842126 A CN108842126 A CN 108842126A CN 201810756842 A CN201810756842 A CN 201810756842A CN 108842126 A CN108842126 A CN 108842126A
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- 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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/059—Mould materials or platings
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- 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
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- 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
- C23C4/18—After-treatment
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- Mechanical Engineering (AREA)
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- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
A kind of metal-cermic coating continuous casting crystallizer copper pipe and preparation method thereof, belongs to continuous cast mold technical field of surface.This method is：Copper pipe is straightened oil removing；Using HVAF inner hole spray gun, starts the HVAF paint finishing that combustion adjuvant is air, carry out sandblasting preheating, then start spraying process program, sprayed on material WC-10Co-4Cr powder is sent in igniting, to the copper pipe spray coating metal ceramic layer after preheating, obtains the copper pipe of metal-cermic coating；Copper pipe surface sealing of hole is carried out using three layers of hole-sealing technology, then carries out the solidification of copper pipe surface layer, the hardness for obtaining metal-cermic coating is HV1200-HV1350, and porosity is≤1%, and the binding force of metal-cermic coating and continuous casting crystallizer copper pipe is >=70MPa.The metal-cermic coating continuous casting crystallizer copper pipe of preparation, coating hardness is high, and brittleness is small, and porosity is low, and binding force is high.
Description
Technical field
The present invention relates to continuous cast mold technical field of surface, and in particular to a kind of metal-cermic coating continuous casting crystallining
Device copper pipe and preparation method thereof.
Background technique
Crystallizer copper pipe is the core component of steel plant continuous casting equipment.Molten steel cooling, preliminary cooled and solidified in crystallizer
Molding, and be formed uniformly with certain thickness green shell.Process of setting is green shell under the action of gravity and external vibration device
It continuously, under relative motion is carried out with crystallizer copper tube wall.The wearability of continuous casting crystallizer copper pipe inner surface will be got well thus, to mention
High service life.To in the wearability improvement method of inner surface of crystallizer copper pipe, wearing layer processing is electroplated in main at present use, but
A large amount of spent acid waste water are generated in electroplating process, environmental protection equipment are required very high.As steelmaking equipment and technology improve, continuous casting
Steel-making develops towards high pulling rate direction, and the requirement of high pulling rate is not achieved in galvanization coating wearability.
Supersonic flame spraying (High Velocity Oxygen Fuel Spray, HVOF) technology is in twentieth century eight
The ten's were formed, and had development in more than 30 years so far, were the most influential spraying technologies of field of thermal spray.Supersonic flame spray
It applies, uses oxygen for combustion adjuvant, burnt by the liquid (such as kerosene) that aperture enters combustion chamber, point after being atomized and after oxygen mix
Combustion, occurs strong gas phase reaction, and the thermal energy for releasing of burning expands product acutely, when this expanding gas flows through Laval nozzle,
By the restraining force of nozzle, flame stream accelerates, and forms supersonic speed hot flame stream, which accelerates sprayed on material to base
Body surface face, to form quality coating.Usual HVOF fuel has kerosene and two kinds of propane, flame combustion chamber temperature 2900-
3100 DEG C, flame flow velocity degree reaches 700-1000m/s；This method is easy in high, at high cost, spraying process using comburant oxygen temperature
Two objects of carbonization are formed, although can guarantee the hardness of sprayed on material, brittleness is big.HVOF body of spray gun rifle is larger, and spray is away from farther out, and one
As be only used for the coating preparation of outer surface of workpiece and larger-diameter work piece inner surface.The internal diameter of continuous casting crystallizer copper pipe at present
Substantially it all cannot achieve and carried out preparing metal-cermic coating with HVOF spray gun.
Summary of the invention
The present invention is directed to problem of the prior art, proposes a kind of metal-cermic coating continuous casting crystallizer copper pipe and its preparation
Method, this method are using air-breathing supersonic flame spraying, i.e. HVAF (High Velocity Air Fuel Spray)
Spraying method, the metal-cermic coating continuous casting crystallizer copper pipe prepared using HVAF inner bore spraying gun.HVAF inner hole spray gun has
Small in size, spray is away from the features such as short, power is small, and coating hardness is high, and brittleness is small, and porosity is low, and binding force is high.
The preparation method of a kind of metal-cermic coating continuous casting crystallizer copper pipe of the invention, using HVAF technique, technique
Steps are as follows：
Step 1：Copper pipe pretreatment
(1) copper pipe surface is straightened：Copper pipe is straightened, the copper pipe after being straightened；
(2) copper pipe surface oil removing：By the copper pipe after alignment, oil purification is removed, the purified copper pipe of oil removing is obtained；
Step 2：Copper pipe surface sandblasting and preheating
Using HVAF inner hole spray gun, start HVAF paint finishing, and set blasting craft program, sandblasting powder is sent in igniting, is opened
Mobile robot motion profile program carries out sandblasting roughening to the purified copper pipe inner surface of oil removing, while being preheated, and obtains pre-
Copper pipe after heat.Wherein, the preheating temperature of copper pipe is 90-120 DEG C, and surface roughness Ra is 2.5-4 μm；
Wherein, the technological parameter of sandblasting and preheating is：The sandblasting powder is the white fused alumina sand that granularity is 180~240 mesh；
The blasting craft program of HVAF paint finishing is：Combustion adjuvant is air, air pressure 98-102psi, and fuel is
Propane or propylene, the air pressure of fuel are 102-106psi, and the flow of nitrogen is 18-25L/min, and the flow of hydrogen is 15-25L/
Min, spray distance 50-110mm, powder sending quantity 100-150g/min；
Step 3：Copper pipe surface spraying
Using HVAF inner hole spray gun, starting HVAF paint finishing, and sets spraying process program, sprayed on material is sent in igniting,
To the copper pipe spray coating metal ceramic layer after preheating, the copper pipe of metal-cermic coating is obtained；Wherein, sprayed on material uses WC-
10Co-4Cr powder, granularity are 2-10 μm；In spraying process, temperature≤180 DEG C of copper pipe are controlled；Coating thickness is 0.05-
0.2mm；
The spraying process program of HVAF paint finishing is：Combustion adjuvant is air, air pressure 95-100psi, and fuel is
Propane or propylene, the air pressure of fuel are 98-102psi, and the flow of nitrogen is 18-25L/min, and the flow of hydrogen is 15-25L/
Min, spray distance 50-110mm, powder sending quantity 80-120g/min；
Step 4：Copper pipe inner surface sealing of hole
Using three layers of hole-sealing technology, sealing pores, the copper pipe after obtaining sealing of hole are carried out；The dosage of every layer of hole sealing agent is 6.0
~7.4m2/L；
Wherein, first layer be bottom hole sealing agent, with spray gun even application metal-cermic coating copper pipe surface；Bottom envelope
Hole agent is aqueous solution, and the mass percent of the ingredient contained and each ingredient is：Zirconium oxide 0.5-2%, rare earth 0.5-2%,
Surplus is water；
The second layer is middle layer hole sealing agent, is directly applied to bottom hole sealing agent surface, the ingredient that middle layer hole sealing agent contains
And the mass percent of each ingredient is：Chromic anhydride 40%-80%, zinc oxide 5%-15%, surplus are water；
Third layer is surface layer hole sealing agent, is directly applied to the surface of middle layer hole sealing agent, the ingredient that surface layer hole sealing agent contains
And the mass percent of each ingredient is：Chromic anhydride 20%-40%, zinc oxide 2%-10%, phosphoric acid 20%-40%, surplus are water；
Step 5：The solidification of copper pipe surface layer
By the copper pipe after sealing of hole, with heating rate for 1-3 DEG C/min, it is warming up to 260-330 DEG C, keeps the temperature 2-3h, then through 20-
30h is cooled to room temperature, and obtains metal-cermic coating continuous casting crystallizer copper pipe, cleaning encapsulation.
In the step 1 (1), the alignment uses press machine, the one N-Side surf degree tolerance of copper pipe cambered surface after alignment
It is required that radius ± 1mm, faces side flatness directly<1mm.
It is described except the technique of oil purification is in the step 1 (2)：Using industrial alcohol by the copper pipe surface after alignment
It deoils, coated inner face will be needed to purify using acetone before spraying.
In the step 3, the WC-10Co-4Cr powder is reunion sintered cobalt chromium cladded wolfram carbide powder, specific
Accounting for gross mass percentage for Co element is that account for gross mass percentage be 4% to 10%, Cr element.
In the step 5, the surface layer solidifies the equipment used as electric furnace.
A kind of metal-cermic coating continuous casting crystallizer copper pipe of the invention is made according to above-mentioned preparation method.
The metal-cermic coating continuous casting crystallizer copper pipe, the hardness of metal-cermic coating are HV1200-HV1350, hole
Gap rate is≤1%, and the binding force of metal-cermic coating and continuous casting crystallizer copper pipe is >=70MPa.
A kind of metal-cermic coating continuous casting crystallizer copper pipe of the invention and preparation method thereof, its advantages are as follows：
1, the performance characteristics of the metal-cermic coating of metal-cermic coating continuous casting crystallizer copper pipe prepared by the present invention are：
(1) high-melting-point is easy to withstand template running temperature；(2) hardness is high (HRC 73 or HV1350)；(3) have and change
Inertia and stability are learned, gets along well powder (covering slag) or molten steel reacts；(4) porosity is low, reduces dirt of the metallic copper to steel billet
Dye；(5) change of copper pipe matrix heat transfer can be ignored；
2, the present invention uses HVAF preparation process, and feature is：HVAF fuel has propylene and two kinds of propane, flame combustion chamber
1600-1900 DEG C of temperature, flame flow velocity degree reaches 900-1200m/s.HVAF flame stream temperature ratio HVOF is low, prepares WC system ceramic coating
When WC hardly decompose, avoid brittlement phase W in coating2The formation of C.HVAF flame stream speed ratio HVOF high, impact force are stronger.Cause
The metal-cermic coating continuous casting crystallizer copper pipe of this HVAF spraying preparation, hardness is high, and brittleness is small, and porosity is low, and binding force is high.
3, method of the invention is able to satisfy high pulling-speed crystallizer copper tabe surface abrasion resistance, high temperature resistant, corrosion resistant requirement, is mentioning
While high continuous casting work steel transportation amount, the replacement cycle of crystallizer copper pipe is extended, labor intensity is reduced.
4, copper pipe surface layer of the invention solidification, limits heating rate and rate of temperature fall, benefit is to prevent temperature
It is excessively high to cause to decompose in particle deposition and form brittle coating.
5, it is of the invention sprayed using HVAF after copper pipe, then carry out sealing pores and curing process and combine, further drop
Low coating porosity discharges the compression between coating and matrix.The two combines and forms the high high-quality coating of fine and close binding force.
6, metal-cermic coating continuous casting crystallizer copper pipe prepared by the present invention, in spraying process, temperature control 180 DEG C with
Under be in order to prevent coating overheat, compression have little time release causes coating binding force to reduce.
Specific embodiment
Below with reference to embodiment, the present invention is described in further detail.
Embodiment 1
A kind of preparation method of R6-160*160*900 metal-cermic coating continuous casting crystallizer copper pipe, using HVAF technique,
Its processing step is as follows：
Step 1：
(1) copper pipe surface is straightened：It is straightened copper pipe with press machine, one N-Side surf degree of cambered surface requires radius 6000mm ± 1mm, directly
Face side flatness<1mm, the copper pipe after being straightened.
(2) copper pipe surface oil removing：The copper pipe surface after alignment is deoiled using industrial alcohol, uses acetone will before spraying
Sprayed surface is needed to purify.
Step 2：Copper pipe surface sandblasting and preheating
Robot program is set, using HVAF inner hole spray gun, starts HVAF paint finishing, sandblasting powder, sandblasting powder are sent in igniting
Using 180~240 mesh white fused alumina sand, preheated while sandblasting is roughened copper pipe surface for copper pipe, preheating temperature is at 90-120 DEG C.
Sandblasting rear surface roughness Ra is 2.5~4 μm.Sandblasting and each relevant parameter such as following table of preheating：
1 copper pipe surface sandblasting of table and pre-heating technique parameter
Step 3：Copper pipe surface spraying
Dusty spray uses WC-10Co-4Cr powder, and 2-10 μm of granularity, crystallizer copper pipe coating thickness is 0.05-
0.2mm.The control of crystallizer copper pipe temperature is at 180 DEG C hereinafter, spraying relevant parameter such as following table in spraying process：
2 spraying parameter of table
Step 4：Copper pipe surface sealing of hole
Using three layers of hole-sealing technology, sealing pores, the copper pipe after obtaining sealing of hole are carried out；
1# bottom hole sealing agent is：1% zirconium oxide, 1% rare earth, surplus are water, and zirconium oxide and rare earth are mixed, water is dissolved in,
With the metal-cermic coating of spray gun even application copper pipe surface, after dry, 2# hole sealing agent is smeared；2# hole sealing agent is 50wt.% chromium
Acid anhydride, 10wt.% zinc oxide, surplus are water, after dry, smear 3# hole sealing agent, weigh 3# hole sealing agent raw material；3# hole sealing agent contains
Raw material and material quality percentage be 25wt.% chromic anhydride, 5wt.% zinc oxide, 25wt.% phosphoric acid, surplus is water, and 3# is sealed
After the mixing of hole agent raw material, the coating after smearing 2# hole sealing agent is directly smeared, and every layer of hole sealing agent dosage is 6.0~7.4m2/
L。
Step 5：The solidification of copper pipe surface layer
In electric furnace, 300 DEG C are warming up within 3 hours by room temperature, after heat preservation 2 hours, then through 25 hours are cooled to room
Temperature.
Step 6：Copper pipe cleaning packaging
It is with reasonable tool that copper pipe processing is clean, copper pipe huyashi-chuuka (cold chinese-style noodles) screw hole and thermocouple hole are handled emphatically.Selection is suitable
Packaging material copper pipe is packed, be placed in solid firm wooden case, copper pipe is fixed from movement in wooden case.
Be below metal-cermic coating continuous casting crystallizer copper pipe manufactured in the present embodiment is tested for the property, and and other
The continuous casting crystallizer copper pipe of process conditions compares, result such as following table：
3 this patent metal-cermic coating continuous casting crystallizer copper pipe of table and other technique continuous casting crystallizer copper pipe performance comparisons
Application case 1
The 2 months 18 years metal-cermic coating continuous casting crystallizer copper pipes prepared using the embodiment of the present invention 1 of certain steel mill, by making
With rear, it is found that metal-cermic coating continuous casting crystallizer copper pipe of the invention has the following advantages that：
1,36,000 ton of steel, greatest wear amount 0.4mm is crossed, much smaller than the abrasion that plating copper pipe crosses 7500 ton hour 2-3mm of steel
Amount；
2, because maintaining the taper of leptoprosopy copper pipe well almost without abrasion；
3, the workload that dismounting is repaired is reduced；
4, the copper pipe service life is extended.
Application case 2
The metal-cermic coating continuous casting crystallizer copper pipe that certain steel mill is prepared in May, 18 using the embodiment of the present invention 1 passes through
After use, it is found that metal-cermic coating continuous casting crystallizer copper pipe of the invention has the following advantages that：
1, average steel transportation amount improves 4.5 times；
2, single branch copper pipe averagely uses 2 times, and the service life reaches 80,000 tons, improves 11 times；
3, slab corner shape is stablized, and greatly reduces crackle；
4, hot-fluid is stablized, and reduces rotten side.
Embodiment 2
A kind of preparation method of R7-162*162*1000 metal-cermic coating continuous casting crystallizer copper pipe, using HVAF technique,
Its processing step is as follows：
Step 1：
(1) copper pipe surface is straightened：It is straightened copper pipe with press machine, one N-Side surf degree of cambered surface requires radius 6000mm ± 1mm, directly
Face side flatness<1mm, the copper pipe after being straightened.
(2) copper pipe surface oil removing：The copper pipe surface after alignment is deoiled using industrial alcohol, uses acetone will before spraying
Sprayed surface is needed to purify.
Step 2：Copper pipe surface sandblasting and preheating
Robot program is set, using HVAF inner hole spray gun, starts HVAF paint finishing, sandblasting powder, sandblasting powder are sent in igniting
Using 180~240 mesh white fused alumina sand, preheated while sandblasting is roughened copper pipe surface for copper pipe, preheating temperature is at 90-120 DEG C.
Sandblasting rear surface roughness Ra is 2.5~4 μm.Sandblasting and each relevant parameter such as following table of preheating：
4 copper pipe surface sandblasting of table and pre-heating technique parameter
Step 3：Copper pipe surface spraying
Dusty spray uses WC-10Co-4Cr powder, and 2-10 μm of granularity, crystallizer copper pipe coating thickness is 0.05-
0.2mm.The control of crystallizer copper pipe temperature is at 180 DEG C hereinafter, spraying relevant parameter such as following table in spraying process：
5 spraying parameter of table
Step 4：Copper pipe surface sealing of hole
Using three layers of hole-sealing technology, sealing pores, the copper pipe after obtaining sealing of hole are carried out；
1# bottom hole sealing agent is：2% zirconium oxide, 0.5% rare earth gadolinium, surplus is water, and zirconium oxide and rare earth are mixed, are dissolved in
Water after dry, smears 2# hole sealing agent, 2# hole sealing agent is 80wt.% with the metal-cermic coating on spray gun even application copper sheet surface
Chromic anhydride, 5wt.% zinc oxide, surplus are water, after dry, smear 3# hole sealing agent, weigh 3# hole sealing agent raw material, 3# hole sealing agent contains
Raw material and material quality percentage be 40wt.% chromic anhydride, 10wt.% zinc oxide, 40wt.% phosphoric acid, surplus is water, and 3# is sealed
After the mixing of hole agent raw material, the coating after smearing 2# hole sealing agent is directly smeared, and every layer of hole sealing agent dosage is 6.0m2/L。
Step 5：The solidification of copper pipe surface layer
In electric furnace, 300 DEG C are warming up within 2 hours by room temperature, after heat preservation 3 hours, then through 20 hours are cooled to room
Temperature.
Step 6：Copper pipe cleaning packaging
It is with reasonable tool that copper pipe processing is clean, copper pipe huyashi-chuuka (cold chinese-style noodles) screw hole and thermocouple hole are handled emphatically.Selection is suitable
Packaging material copper pipe is packed, be placed in solid firm wooden case, copper pipe is fixed from movement in wooden case.
Claims (7)
1. a kind of preparation method of metal-cermic coating continuous casting crystallizer copper pipe, which is characterized in that use HVAF technique, technique
Steps are as follows：
Step 1：Copper pipe pretreatment
(1) copper pipe surface is straightened：Copper pipe is straightened, the copper pipe after being straightened；
(2) copper pipe surface oil removing：By the copper pipe after alignment, oil purification is removed, the purified copper pipe of oil removing is obtained；
Step 2：Copper pipe surface sandblasting and preheating
Using HVAF inner hole spray gun, start HVAF paint finishing, and set blasting craft program, sandblasting powder, starter motor are sent in igniting
Device people's motion profile program carries out sandblasting roughening to the purified copper pipe inner surface of oil removing, while being preheated, after obtaining preheating
Copper pipe；Wherein, the preheating temperature of copper pipe is 90-120 DEG C, and surface roughness Ra is 2.5-4 μm；
Wherein, the technological parameter of sandblasting and preheating is：The sandblasting powder is the white fused alumina sand that granularity is 180~240 mesh；
The blasting craft program of HVAF paint finishing is：Combustion adjuvant is air, and air pressure 98-102psi, fuel is propane
Or propylene, the air pressure of fuel are 102-106psi, the flow of nitrogen is 18-25L/min, and the flow of hydrogen is 15-25L/min,
Spray distance is 50-110mm, powder sending quantity 100-150g/min；
Step 3：Copper pipe surface spraying
Using HVAF inner hole spray gun, start HVAF paint finishing, and set spraying process program, sprayed on material is sent in igniting, to pre-
Copper pipe spray coating metal ceramic layer after heat, obtains the copper pipe of metal-cermic coating；Wherein, sprayed on material uses WC-10Co-4Cr
Powder, granularity are 2-10 μm；In spraying process, temperature≤180 DEG C of copper pipe are controlled；Coating thickness is 0.05-0.2mm；
The spraying process program of HVAF paint finishing is：Combustion adjuvant is air, and air pressure 95-100psi, fuel is propane
Or propylene, the air pressure of fuel are 98-102psi, the flow of nitrogen is 18-25L/min, and the flow of hydrogen is 15-25L/min, spray
Applying distance is 50-110mm, powder sending quantity 80-120g/min；
Step 4：Copper pipe inner surface sealing of hole
Using three layers of hole-sealing technology, sealing pores, the copper pipe after obtaining sealing of hole are carried out；The dosage of every layer of hole sealing agent be 6.0~
7.4m2/L；
Wherein, first layer be bottom hole sealing agent, with spray gun even application metal-cermic coating copper pipe surface；Bottom hole sealing agent
For aqueous solution, the mass percent of the ingredient contained and each ingredient is：Zirconium oxide 0.5-2%, rare earth 0.5-2%, surplus
For water；
The second layer is middle layer hole sealing agent, is directly applied to bottom hole sealing agent surface, ingredient that middle layer hole sealing agent contains and each
The mass percent of a ingredient is：Chromic anhydride 40%-80%, zinc oxide 5%-15%, surplus are water；
Third layer is surface layer hole sealing agent, is directly applied to the surface of middle layer hole sealing agent, ingredient that surface layer hole sealing agent contains and each
The mass percent of a ingredient is：Chromic anhydride 20%-40%, zinc oxide 2%-10%, phosphoric acid 20%-40%, surplus are water；
Step 5：The solidification of copper pipe surface layer
By the copper pipe after sealing of hole, with heating rate for 1-3 DEG C/min, it is warming up to 260-330 DEG C, keeps the temperature 2-3h, then through 20-30h,
It is cooled to room temperature, obtains metal-cermic coating continuous casting crystallizer copper pipe, cleaning encapsulation.
2. the preparation method of metal-cermic coating continuous casting crystallizer copper pipe as described in claim 1, which is characterized in that described
In step 1 (1), the alignment is using press machine, the one N-Side surf degree tolerance radius ± 1mm of copper pipe cambered surface after alignment,
Face side flatness directly<1mm.
3. the preparation method of metal-cermic coating continuous casting crystallizer copper pipe as described in claim 1, which is characterized in that the step
It is described except the technique of oil purification is in rapid 1 (2)：The copper pipe surface after alignment is deoiled using industrial alcohol, is made before spraying
Coated inner face will be needed to purify with acetone.
4. the preparation method of metal-cermic coating continuous casting crystallizer copper pipe as described in claim 1, which is characterized in that described
In step 3, it is specially that Co element accounts for total matter that the WC-10Co-4Cr powder, which is reunion sintered cobalt chromium cladded wolfram carbide powder,
Amount percentage is that account for gross mass percentage be 4% to 10%, Cr element.
5. the preparation method of metal-cermic coating continuous casting crystallizer copper pipe as described in claim 1, which is characterized in that described
In step 5, the surface layer solidifies the equipment used as electric furnace.
6. a kind of metal-cermic coating continuous casting crystallizer copper pipe, according to preparation method described in any one of Claims 1 to 5
It is made.
7. metal-cermic coating continuous casting crystallizer copper pipe as claimed in claim 6, which is characterized in that metal-cermic coating it is hard
Degree is HV1200-HV1350, and porosity is≤1%, the binding force of metal-cermic coating and continuous casting crystallizer copper pipe is >=
70MPa。
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109266994A (en) * | 2018-11-27 | 2019-01-25 | 广东省新材料研究所 | A kind of preparation method of the outer surface supersonic spray coating coating of complex parts |
| CN109321859A (en) * | 2018-11-27 | 2019-02-12 | 广东省新材料研究所 | A kind of metal surface pre-treating method |
| CN116200734A (en) * | 2023-03-14 | 2023-06-02 | 广东省科学院新材料研究所 | Method for improving corrosion resistance of tungsten carbide-cobalt coating, corrosion resistant coating and application thereof |
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| US11859757B2 (en) | 2020-12-04 | 2024-01-02 | Caterpillar Inc. | Fluid conduits with selectively coated surfaces |
| CN116200734A (en) * | 2023-03-14 | 2023-06-02 | 广东省科学院新材料研究所 | Method for improving corrosion resistance of tungsten carbide-cobalt coating, corrosion resistant coating and application thereof |
| CN116200734B (en) * | 2023-03-14 | 2024-02-02 | 广东省科学院新材料研究所 | Method for improving corrosion resistance of tungsten carbide-cobalt coating, corrosion resistant coating and application thereof |
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