CN106756740A - A kind of preparation method of ceramic composite coating scraper - Google Patents
A kind of preparation method of ceramic composite coating scraper Download PDFInfo
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- CN106756740A CN106756740A CN201611094024.3A CN201611094024A CN106756740A CN 106756740 A CN106756740 A CN 106756740A CN 201611094024 A CN201611094024 A CN 201611094024A CN 106756740 A CN106756740 A CN 106756740A
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- matrix
- coating
- scraper
- spray
- plasma spraying
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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
- C23C4/08—Metallic material containing only metal elements
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- Materials Engineering (AREA)
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- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
A kind of preparation method of ceramic composite coating scraper belongs to thermal spraying forming field, it is ensured that coating internal stress is reduced on the premise of coating quality, prepares the coating without deformation.The deflection (off-axis distance and scraper lenth ratio) of plasma spraying thin-walled scraper long is controlled using matrix cooling, fixed system, spraying method and coating material and structure within 5%.The cooling gas system of the cooling water system at the matrix back side, heat sink body and matrix surface, it is ensured that matrix (non-plasma spray gun facing portion position) is maintained at the temperature between 15 DEG C to 30 DEG C.Cause that matrix is tightly attached on heat sink body with the face way of contact using non-rigid strong band of restraining, matrix is not moved and deforms in spraying process.Automatic powder feeding system in Plasma Spraying Process Using is that the spray gun running orbit in laterally (i.e. along spray gun moving direction) powder feeding, and Plasma Spraying Process Using is unidirectional.Thin plate scraper deflection is obtained less than 5%, hardness, bond strength, coating structure meet requirement.
Description
Technical field：
The invention belongs to thermal spraying forming field, it is related to a kind of preparation method of ceramic composite coating scraper.
Background technology：
Ceramic blade is the part of production coating paper and coating panel core the most, and added value is very high, and scraper is in work
During rubbed by paper and coating, cause abrasion, traditional steel spatula service life only has 3-5h, and this is not only caused
The period of adjustment also have impact on coating production efficiency after the waste of material, exchanging knives process and tool changing.In order to obtain good coating effect
Really, scraper must also have good elasticity, can be effectively improved using the material more more resistant than traditional scraper steel band and scraped
The service life of knife, but it is difficult to solve to improve wearability simultaneously by pasting the methods such as wear rib, plating hard chrome in blade edge
And the contradiction between keeping scraper elasticity.
Plasma spraying is a kind of efficient wear-resistant coating preparation method, but because matrix steel band is very thin, it is spray coated
Journey can cause the gross distortion of scraper, and scraper is very high to the linearity of cutting edge and required precision.Come for such thin-walled parts
Say, strain can cause deformation caused by the thermal mismatching of matrix and coating during spraying.Generally, substrate temperature is raised favourable
Can also increase therewith in coating quality, but thermal stress.So how to ensure that there are quality coating less remnants to answer simultaneously again
Change is the key of problem.
For how to control the strain problems in plasma spraying thin plate, many scholars propose certain methods, but have
Different degrees of defect.The remnants that Zhu Liping, Wang Yanli et al. slow down coating by optimizing spray parameters and process conditions should
Become, but be difficult to realize that quality coating prepares the target with low strain dynamic simultaneously.Using a grand invention without deformation spray equipment
And the continuous spray frock of Zhang Jiaqin, Fang Kaizhong et al. invention is sprayed, and has larger thermal strain, reason is not protect
Card matrix is tightly attached on heat sink body causes thermal mismatching strain larger.Sun Hongfei, Wang Canming etc. have made special clamping
Tool, although scraper is clamped by adjusting puller bolt, but still has very big thermal strain.These inventions are to a certain degree
On alleviate thermal strain, but do not solve quality coating and low-heat fundamentally and strain contradiction therebetween.
The content of the invention：
The present invention is directed to propose a kind of reliable suitable for the ceramic composite coating preparation method on thin-walled scraper, purport
Coating internal stress is reduced on the premise of coating quality is ensured, the coating without deformation is prepared.
To solve foregoing invention purpose, technical scheme is specific as follows：
1, a kind of preparation method of ceramic composite coating scraper, matrix cooling system includes：The cooling system at the matrix back side,
The cooling gas system of heat sink body and matrix surface, (non-plasma spray gun is just right for matrix in ensure that Plasma Spraying Process Using
Position) it is maintained at the temperature between 15 DEG C to 30 DEG C.
2, a kind of preparation method of ceramic composite coating scraper, matrix fixed system includes：Using non-rigid band contained by force
So that matrix is attached on heat sink body with the face way of contact so that be not moved in matrix spraying process and deformed.
3, the preparation method and material of a kind of ceramic composite coating scraper, spraying method include：In Plasma Spraying Process Using
Automatic powder feeding system be that laterally (along spray gun moving direction) powder feeding and spray gun running orbit are unidirectional.Slightly leaned on using spray gun flame stream
It is preceding to substrate preheating, and contained band is near as small as possible by sample misfit strain followed by cooling system and by force.So both
Ensure that quality coating ensure that low strain dynamic again.
4, a kind of preparation method of ceramic composite coating scraper, coating composition and structure include：Using plasma spraying side
Method first sprays a layer thickness and is 20-50 μm of metal prime coat layer, then sprays the ceramic coating that a layer thickness is 150-250 μm；
Prepare the metal powder that the material particle diameter such as including Mo, NiAl, NiCr is 15-45 μm and the Cr that particle diameter is 15-45 μm2O3, 87wt%
Al2O3+ 13wt%TiO2And 60%wtCr2O3+ 40%wtTiO2Deng ceramic powder.
5, a kind of preparation method of ceramic composite coating scraper, specific implementation is comprised the following steps：
1) clean treatment is carried out to matrix；
2) matrix is attached on heat sink body with non-rigid contained band with the face way of contact, it is ensured that thin plate scraper long is spray coated
Journey is not subjected to displacement and deforms with caused by external force；Using non-rigid veil, only expose blade edge and treat spray plane.
3) cooling system is opened, cooling water flow is that, more than 40L/h, temperature is less than 15 DEG C；Front end cooling gas flow is
More than 40SPLM, pressure is more than 80MPa.
4) tested using plasma spraying 9M spray guns, using horizontal automatic powder feeding system, spraying profile is set as single track (spray
Spray gun backhaul is without matrix surface during painting)
5) sprayed using plasma spraying method, first sprayed metal prime coat layer of a layer thickness at 20-50 μm, then
Spraying a layer thickness is 150-250 μm of abrasion-proof ceramic coat；
Actual gain of the invention：
1, cooling system of the invention and fixed system and automatic powder feeding system and spray gun running orbit can effectively reduce thin
Residual stress of the wall scraper in spraying process is so as to suppress the deformation of scraper.
2, first with metal coating as prime coat layer in the present invention, by increasing capacitance it is possible to increase the non-deformability of thin-walled scraper, then
With abrasion-proof ceramic coat is prepared, the properties of scraper are disclosure satisfy that again in the case of matrix is indeformable.
Brief description of the drawings
The present invention is described in more detail with specific embodiment below in conjunction with the accompanying drawings.
Fig. 1 is the partial schematic diagram of cooling of the invention and fixed system；Each code name implication in accompanying drawing：1 heat sink body, 2 is firm
Property restrain band, 3 cooling-water ducts, 4 water inlets, 5 seals, 6 delivery ports；
Fig. 2 is that the present invention first uses 60%wtCr again with Mo as prime coat layer2O3+ 40wt%TiO2Applied as wear-resistant ceramic
The Cross Section Morphology figure of layer；
Fig. 3 is to spray 60%wtCr with Typical spray method2O3+ 40wt%TiO2The sample and present invention spraying Mo+ of coating
(60wt%Cr2O3+ 40wt%TiO2) coating sample comparison diagram；
Fig. 4 is the Mo+Cr of present invention spraying2O3The assay maps of coating；
Fig. 5 is the Mo+ (87wt%Al of present invention spraying2O3+ 13wt%TiO2) coating assay maps.
Specific embodiment：
The present invention is described in further detail with instantiation below in conjunction with the accompanying drawings, but protection scope of the present invention be not limited to it is following
Embodiment.
Embodiment 1
1) clean treatment is carried out to matrix；
2) matrix is attached on heat sink body with non-rigid contained band with the face way of contact, it is ensured that thin plate scraper long is spray coated
Journey is not moved；Using non-rigid veil, only expose blade edge and treat spray plane.
3) cooling system is opened, cooling water flow is 40L/h, and temperature is less than 15 DEG C；Front end cooling gas flow is
40SPLM, pressure is 80MPa.
4) tested using plasma spraying 9M spray guns, using horizontal automatic powder feeding system, spraying profile is set as single track (spray
Spray gun backhaul is without matrix surface during painting) adjustment Plasma Spray Parameters be：Away from 100mm, primary air amount is for spray
40SLPM, powder feeding rate is 30g/min, and electric current is 600A, and voltage is 55V, with one layer of the Mo powder sprays that particle diameter is 15-45 microns
Coating layer thickness is 20-50 μm of metal prime coat layer.
5) to spray away from 100mm, primary air amount is 45SLPM to adjustment Plasma Spray Parameters, and powder feeding rate is 30g/min, electric current
It is 600A, voltage is 60V, with the 60wt%Cr that particle diameter is 15-45 microns2O3+ 40wt%TiO2One layer of coating layer thickness of powder spray
It is 150-250 μm of abrasion-proof ceramic coat.
Result as shown in figure 3, the present invention spray thin plate scraper deflection be 4%, much smaller than Typical spray scraper deformation
Amount 20%, metal coating hardness of the present invention is 580HV, and ceramic coating hardness is 852HV, and anchoring strength of coating is 23MPa, can
Meet the performance of scraper.Substrate temperature is maintained at 25 DEG C of state of temperature in non-path portion in experiment, in spraying process
Sample is not moved, and actual prime coat layer thickness is 47 μm, and thickness of ceramic coating is 215 μm.
Embodiment 2
1) clean treatment is carried out to matrix；
2) matrix is attached on heat sink body with non-rigid contained band with the face way of contact, it is ensured that thin plate scraper long is spray coated
Journey is not moved；Using non-rigid veil, only expose blade edge and treat spray plane.
3) cooling system is opened, cooling water flow is 40L/h, and temperature is less than 15 DEG C；Front end cooling gas flow is
40SPLM, pressure is 80MPa.
4) tested using plasma spraying 9M spray guns, using horizontal automatic powder feeding system, spraying profile is set as single track (spray
Spray gun backhaul is without matrix surface during painting) adjustment Plasma Spray Parameters be：Away from 100mm, primary air amount is for spray
40SLPM, powder feeding rate is 30g/min, and electric current is 600A, and voltage is 55V, with one layer of the Mo powder sprays that particle diameter is 15-45 microns
Coating layer thickness is 20-50 μm of metal prime coat layer.
5) to spray away from 100mm, primary air amount is 45SLPM to adjustment Plasma Spray Parameters, and powder feeding rate is 30g/min, electric current
It is 600A, voltage is 60V, with the Cr that particle diameter is 15-45 microns2O3One layer of coating layer thickness of powder spray is wear-resisting for 150-250 μm
Ceramic coating.
Result as shown in figure 4, institute's spraying thin-walled scraper deflection of the present invention be 3%, ceramic coating hardness be 631HV, apply
Layer bond strength is 28MPa, meets scraper properties.Substrate temperature is maintained at 27 DEG C of temperature in non-path portion in experiment
State, sample is not moved in spraying process, and actual prime coat layer thickness is 37 μm, and thickness of ceramic coating is 245 μm.
Embodiment 3
1) clean treatment is carried out to matrix；
2) matrix is attached on heat sink body with non-rigid contained band with the face way of contact, it is ensured that thin plate scraper long is spray coated
Journey is not moved；Using non-rigid veil, only expose blade edge and treat spray plane.
3) cooling system is opened, cooling water flow is 40L/h, and temperature is less than 15 DEG C；Front end cooling gas flow is
40SPLM, pressure is 80MPa.
4) tested using plasma spraying 9M spray guns, using horizontal automatic powder feeding system, spraying profile is set as single track (spray
Spray gun backhaul is without matrix surface during painting) 3) adjustment Plasma Spray Parameters be：Away from 100mm, primary air amount is for spray
40SLPM, powder feeding rate is 30g/min, and electric current is 600A, and voltage is 70V, with one layer of the Mo powder sprays that particle diameter is 15-45 microns
Coating layer thickness is 20-50 μm of metal prime coat layer.
4) to spray away from 100mm, primary air amount is 40SLPM to adjustment Plasma Spray Parameters, and powder feeding rate is 30g/min, electric current
It is 600A, voltage is 65V, with the 87wt%Al that particle diameter is 15-45 microns2O3+ 13wt%TiO2One layer of coating layer thickness of powder spray
It is 150-250 μm of abrasion-proof ceramic coat.
Result as shown in figure 5, institute's spraying thin-walled scraper deflection of the present invention be 1%, ceramic coating hardness be 711HV, apply
Layer bond strength is 31MPa, meets scraper properties.Substrate temperature is maintained at 25 DEG C of temperature in non-path portion in experiment
State, sample is not moved in spraying process, and actual prime coat layer thickness is 41 μm, and thickness of ceramic coating is 198 μm.
Claims (6)
1. a kind of preparation method of ceramic composite coating scraper, it is characterised in that using matrix cooling, such that matrix is attached to heat
On heavy body, plasma spraying mode and coating structure control the deflection i.e. off-axis of plasma spraying thin-walled scraper long
Distance is with scraper lenth ratio within 5%.
2. method according to claim 1, it is characterised in that matrix cooling concrete measure is, using the cooling at the matrix back side
The cooling gas system of water system, heat sink body and matrix surface, ensure that matrix keeps in addition to plasma gun facing portion position
Temperature between 15 DEG C to 30 DEG C.
3. method according to claim 1, it is characterised in that：Cause matrix with face contact side using non-rigid strong band of restraining
Formula is attached on heat sink body, and matrix is not moved and deforms in spraying process.
4. method according to claim 1, it is characterised in that：Automatic powder feeding system in Plasma Spraying Process Using is edge for transverse direction
Spray gun moving direction powder feeding, and spray gun running orbit in Plasma Spraying Process Using is unidirectional.
5. method according to claim 1, it is characterised in that：Use plasma spraying method first spray a layer thickness for
20-50 μm of metal prime coat layer, then spray the ceramic coating that a layer thickness is 150-250 μm.
6. method according to claim 5, it is characterised in that：Metal prime coat layer raw material is to include Mo, NiAl or NiCr,
And particle diameter is 15-45 μm of metal powder；Ceramic coating raw material is the Cr that particle diameter is 15-45 μm2O3, 87wt%Al2O3+ 13wt%
TiO2Or 60%wtCr2O3+ 40%wtTiO2。
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| CN201611094024.3A CN106756740A (en) | 2016-12-02 | 2016-12-02 | A kind of preparation method of ceramic composite coating scraper |
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| CN201611094024.3A CN106756740A (en) | 2016-12-02 | 2016-12-02 | A kind of preparation method of ceramic composite coating scraper |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110284095A (en) * | 2019-07-15 | 2019-09-27 | 马鞍山市智新纳米材料有限公司 | A kind of preparation method of ceramics creping doctor |
| CN110735102A (en) * | 2019-11-15 | 2020-01-31 | 天宜上佳（天津）新材料有限公司 | production method of brake disc and brake disc cooling device |
| CN116926538A (en) * | 2023-08-02 | 2023-10-24 | 齐鲁工业大学(山东省科学院) | Self-passivation high corrosion-resistant Fe-VC composite laser cladding layer and preparation method thereof |
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| CN204959022U (en) * | 2015-08-05 | 2016-01-13 | 沈阳鑫海洪源通用设备有限公司 | Scraper spraying device |
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| CN101920240A (en) * | 2009-06-15 | 2010-12-22 | 上海运城制版有限公司 | Ceramic comma doctor roll |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110735102A (en) * | 2019-11-15 | 2020-01-31 | 天宜上佳（天津）新材料有限公司 | production method of brake disc and brake disc cooling device |
| CN110735102B (en) * | 2019-11-15 | 2024-01-26 | 天宜上佳（天津）新材料有限公司 | Brake disc production method and brake disc cooling device |
| CN116926538A (en) * | 2023-08-02 | 2023-10-24 | 齐鲁工业大学(山东省科学院) | Self-passivation high corrosion-resistant Fe-VC composite laser cladding layer and preparation method thereof |
| CN116926538B (en) * | 2023-08-02 | 2024-03-12 | 齐鲁工业大学(山东省科学院) | Self-passivation high corrosion-resistant Fe-VC composite laser cladding layer and preparation method thereof |
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Application publication date: 20170531 |