CN106637035A - Wear-resistant coating on valve plate of EB furnace equipment gate valve, and spraying technology thereof - Google Patents
Wear-resistant coating on valve plate of EB furnace equipment gate valve, and spraying technology thereof Download PDFInfo
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- CN106637035A CN106637035A CN201710083932.0A CN201710083932A CN106637035A CN 106637035 A CN106637035 A CN 106637035A CN 201710083932 A CN201710083932 A CN 201710083932A CN 106637035 A CN106637035 A CN 106637035A
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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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
- C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
- C22C29/067—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds comprising a particular metallic binder
-
- 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
- C23C4/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
Abstract
The invention provides a wear-resistant coating on a valve plate of an EB furnace equipment gate valve, and a spraying technology thereof. The wear-resistant coating comprises components in percentage by mass as follows: 50-80% of Cr3C2, 4-10% of Cr and 16-40% of Ni. The spraying technology comprises: firstly, thinning the valve plate by 0.3-0.5mm, and after cleaning, adopting brown aluminium oxide sand grains to carry out sand blasting and coarsening on a surface; compressed air used for sand blasting is dry and oil-free, the air pressure is about 0.6-0.8MPa, the spraying angle is 90+/-10 degrees, the sand blasting distance is 0.15-0.2m, and sand blasting is completed until the surface of the valve plate is even and does not reflect light; the high-performance wear-resistant coating is prepared on the surface of the valve plate by adopting an HVOF (high velocity oxy-fuel) technology, the thickness is 0.25-0.40 mm, fuel gas used for spraying is propane, combustion-supporting gas is compressed air, argon gas or nitrogen gas is used as carrier gas at the same time, and auxiliary gas is hydrogen gas. The wear-resistant coating can effectively improve the surface hardness and wear resistance of the valve plate, prolong the service life, and improve the resistance, of the valve plate surface, to erosive wear caused by titanium sponge and other medium particles.
Description
Technical field
The present invention relates to a kind of spraying coating process, specifically a kind of EB furnace apparatus gate valve plate wear-resistant coating and its spray
Apply technique.
Background technology
Electron beam cold hearth melting stove（EB stoves）It is the irreplaceable advanced smelting equipment of current high-quality titanium or titanium alloy ingot, its
Vacuum gate valve plays a part of vacuum sealing isolation and blanking channel in titanium sponge rotary drum dispenser, and valve plate therein is to close
One of key member.Valve plate is impacted by titanium sponge for a long time in use, and titanium dioxide dust, the abrasion of titanium valve dirt
And scratch.Valve plate surface produces worn down and scratch so that valve inner rubber seal Fast Wearing, causes equipment vacuum
Gas leakage, and then affect the normal operation of integral device.Therefore, processed using Case hardening techniques, prepared on valve plate surface
One layer of wear-resistant coating with higher hardness, is expected to solve the problems, such as plate valve wear and leakage.
The existing major technique for solving valve plate erosive wear phenomenon is included using the more preferable material of anti-wear performance, optimization structure
Design and Case hardening techniques etc..In the patent of invention of Application No. 201320612718.7《High-temperature and high-pressure wearable gate valve》
In, valve seat is arranged on valve body by antifriction metal (AFM) circle, after valve base sealing surface wear, replacing can be pulled down from valve body, really
The sealing property protected between valve seat and valve plate, by said structure product performance is extended, and reduces use cost.It is close in valve
Front cover hardening technique aspect, the patent of invention of Application No. 2013044348.3《A kind of sealing surface surface anticorrosion coating spraying work
Skill》Used in HVAF be prepared for one layer 600～900 μm of wear-resistant coating, anchoring strength of coating is 39～
43MPa, but the hardness of coating and rear processing do not examined, and coating layer thickness is bigger than normal, is not also suitable for valve plate surface.
The content of the invention
The present invention seeks to the deficiency to solve above-mentioned technical problem, there is provided a kind of wear-resisting painting of EB furnace apparatus gate valve plate
Layer and its spraying coating process, can effectively improve valve plate case hardness and wearability, increase the service life, and improve valve plate surface resistance to
The erosive wear of the media particles such as titanium sponge.
The present invention is for the solution technical scheme that adopted of above-mentioned technical problem：
A kind of EB furnace apparatus gate valve plate wear-resistant coating, each composition of the wear-resistant coating and its mass percent are：Cr3C2
50 ~ 80%, Cr 4 ~ 10%, Ni 16 ~ 40%.
The spraying coating process of the EB furnace apparatus gate valve plate wear-resistant coating, it is characterised in that：Comprise the following steps：
（1）Surface Machining：By the overall thinning 0.3～0.5mm of valve plate thickness, using as the reserved of valve plate two sides coating layer thickness；
（2）Surface clean：Valve plate surface is cleaned, surface is removed because machining brought greasy dirt；
（3）Sandblasting is roughened：Valve plate after cleaning is fixed on fixture prevents deformation；First, mass ratio is adopted for 2：1 24 mesh
Sandblasting roughening is carried out to surface with 40 mesh Brown Alundum sand grains；Sandblasting is required：Compressed air drying, oil-free used by sandblasting, air pressure is about
0.6 ~ 0.8MPa, jet angle is 90 ± 10 °, and sandblasting distance is 0.15 ~ 0.2m, and sandblasting is to the uniform no-reflection in valve plate surface；
（4）It is prepared by coating:High-performance abrasion-proof coating is prepared on valve plate surface using HVAF technique, thickness 0.25 ~
0.40mm, spraying combustion gas used is propane, and combustion-supporting gas is compressed air, while the use of argon gas or nitrogen being carrier gas, aids in gas
Body is hydrogen；Valve plate surface needs preheating during first spraying, and valve plate surface temperature answers >=80 DEG C after preheating, valve plate in spraying process
Surface temperature answers≤180 DEG C, prevents coating overheated by the way of multiple tracks spraying and pressure-air cooling and valve plate deformation, spraying
During, it is desirable to 0.5 ~ 0.6MPa of propane pressure, 0.55 ~ 0.7MPa of air pressure, 0.8 ~ 1.0MPa of nebulizer gas pressure, carrier gas flux
30 ~ 50 L/min, 0.75 ~ 1.0MPa of Hydrogen Vapor Pressure, the L/min of hydrogen flowing quantity 25 ~ 50, the g/min of powder feed rate 20 ~ 50, spraying
The mm of distance 180 ~ 250,75 ~ 90 ° of spray angle, the mm/s of spraying rate 500 ~ 1000 sprays the mm of step pitch 2 ~ 5, chamber pressure
0.3~0.5MPa；
（5）Attrition process：Meet Dimension of Valve Plate precision, flatness and surface roughness by attrition process to require.
Step（1）The processing method of middle employing milling or mill is totally thinning by valve plate thickness.
Step（2）Middle employing acetone or absolute ethyl alcohol are cleaned to valve plate surface.
Step（5）In adopt 80 ~ 120 mesh skives to roughly grind metal ceramic wear-resisting coating, grinding speed 20 ~
30m/s, 0.01 ~ 0.03mm of the depth of cut, the skive after corase grind using 240 ~ 320 mesh carries out essence to metal-cermic coating
Mill, 25 ~ 40m/s of grinding speed, the depth of cut about 0.01mm.
Beneficial effect is：
1st, the present invention designs EB stove gate valve plate wear-resistant coatings and its spraying coating process by coating alloy optimizing components,
And the spy of a floor height hardness, high bond strength, low porosity is prepared on valve plate surface using HVAF HVAFs technique
Different coating solving valve plate wear phenomenon, the service life overall so as to improve equipment.
2nd, the present invention is provided valve plate surface high-performance abrasion-proof coating technology scheme and technique, can be on gate valve plate surface
Prepare high rigidity, high bond strength, the abrasion-resistant coatings of low porosity, it is processed after coating layer thickness be 0.15 ~ 0.25mm, apply
Layer and the bond strength ＞ 60MPa of matrix, the microhardness of coating is 7004 ~ 1000HV0.1, porosity ＜ 2%.The present invention is obtained
High-performance abrasion-proof coating be mainly used in the parts such as EB stove gate valve plates, valve plate case hardness and resistance to can be effectively improved
Mill property, increases the service life, and the erosive wear of the media particles such as the resistance to titanium sponge in valve plate surface is improved, with important engineer applied
Value.Compared with existing coating and technology of preparing, have the advantages that technique is new, coating good processability, advantage of lower cost.
Specific embodiment
A kind of EB furnace apparatus gate valve plate wear-resistant coating, each composition of the wear-resistant coating and its mass percent are：
Cr3C2 50 ~ 80%, Cr 4 ~ 10%, Ni16 ~ 40%.
The spraying coating process of the EB furnace apparatus gate valve plate wear-resistant coating, it is characterised in that：Comprise the following steps：
（1）Surface Machining：By the overall thinning 0.3～0.5mm of valve plate thickness, using as the reserved of valve plate two sides coating layer thickness；
（2）Surface clean：Valve plate surface is cleaned, surface is removed because machining brought greasy dirt；
（3）Sandblasting is roughened：Valve plate after cleaning is fixed on fixture prevents deformation；First, mass ratio is adopted for 2：1 24 mesh
Sandblasting roughening is carried out to surface with 40 mesh Brown Alundum sand grains；Sandblasting is required：Compressed air drying, oil-free used by sandblasting, air pressure is about
0.6 ~ 0.8MPa, jet angle is 90 ± 10 °, and sandblasting distance is 0.15 ~ 0.2m, and sandblasting is to the uniform no-reflection in valve plate surface；
（4）It is prepared by coating:High-performance abrasion-proof coating is prepared on valve plate surface using HVAF technique, thickness 0.25 ~
0.40mm, spraying combustion gas used is propane, and combustion-supporting gas is compressed air, while the use of argon gas or nitrogen being carrier gas, aids in gas
Body is hydrogen；Valve plate surface needs preheating during first spraying, and valve plate surface temperature answers >=80 DEG C after preheating, valve plate in spraying process
Surface temperature answers≤180 DEG C, prevents coating overheated by the way of multiple tracks spraying+pressure-air cooling and valve plate deformation, spraying
During, spraying parameter is shown in Table 1.
Table 1：
（5）Attrition process：Meet Dimension of Valve Plate precision, flatness and surface roughness by attrition process to require.
Step（1）The processing method of middle employing milling or mill is totally thinning by valve plate thickness.
Step（2）Middle employing acetone or absolute ethyl alcohol are cleaned to valve plate surface.
Step（5）In adopt 80 ~ 120 mesh skives to roughly grind metal ceramic wear-resisting coating, grinding speed 20 ~
30m/s, 0.01 ~ 0.03mm of the depth of cut, the skive after corase grind using 240 ~ 320 mesh carries out essence to metal-cermic coating
Mill, 25 ~ 40m/s of grinding speed, the depth of cut about 0.01mm.
Embodiment 1
Valve plate thickness is machined to by 9.6mm from 10mm using flat stone mill, coating composition is Cr3C275%, Cr 5%, Ni 20%.
HVAF spraying coating process is：0.53 ~ 0.60MPa of propane pressure, 0.62 ~ 0.68MPa of air pressure, carrier gas flux 30L/min, hydrogen
Pressure 0.88MPa, hydrogen flowing quantity 45L/min, powder feed rate 35g/min, spray distance 200mm, 90 ° of spray angle, spraying speed
Degree 700mm/s, step pitch 3mm.Chamber pressure 0.41MPa during spraying, 110～150 DEG C of substrate temperature.The coating of preparation combines strong
Degree ＞ 60MPa, microhardness 937HV0.1, porosity 0.98%, 0.396 μm of Coating Surface Roughness, valve plate after ground processing
Flatness 0.07mm.
Embodiment 2
Valve plate thickness is machined to by 9.7mm from 10mm using flat stone mill, coating composition is Cr3C280%, Cr 4%, Ni 16%.
HVAF spraying coating process is：0.51 ~ 0.55MPa of propane pressure, 0.62 ~ 0.64MPa of air pressure, carrier gas flux 30L/min, hydrogen
Pressure 0.82MPa, hydrogen flowing quantity 50L/min, powder feed rate 30g/min, spray distance 180mm, 90 ° of spray angle, spraying speed
Degree 700mm/s, step pitch 3mm.Chamber pressure 0.40MPa during spraying, 110～140 DEG C of substrate temperature.The coating of preparation combines strong
Degree ＞ 60MPa, microhardness 986HV0.1, porosity 1.28%, 0.388 μm of Coating Surface Roughness, valve plate after ground processing
Flatness 0.08mm.
Embodiment 3
Valve plate thickness is machined to by 9.6mm from 10mm using flat stone mill, coating composition is Cr3C250%, Cr 10%, Ni 40%.
HVAF spraying coating process is：0.50 ~ 0.55MPa of propane pressure, 0.58 ~ 0.65MPa of air pressure, carrier gas flux 35L/min, hydrogen
Pressure 0.85MPa, hydrogen flowing quantity 50L/min, powder feed rate 40g/min, spray distance 200mm, 90 ° of spray angle, spraying speed
Degree 1000mm/s, step pitch 3mm.Chamber pressure 0.38MPa during spraying, 100～150 DEG C of substrate temperature.The coating of preparation is combined
Intensity ＞ 60MPa, microhardness 759HV0.1, porosity 0.82%, 0.400 μm of Coating Surface Roughness, valve after ground processing
Plate flatness 0.07mm.
Embodiment 4
A kind of EB furnace apparatus gate valve plate wear-resistant coating, each composition of the wear-resistant coating and its mass percent are：Cr3C2
50%, Cr 10%, Ni40%.
The spraying coating process of the EB furnace apparatus gate valve plate wear-resistant coating, it is characterised in that：Comprise the following steps：
（1）Surface Machining：By the overall thinning 0.3mm of valve plate thickness, using as the reserved of valve plate two sides coating layer thickness；
（2）Surface clean：Valve plate surface is cleaned, surface is removed because machining brought greasy dirt；
（3）Sandblasting is roughened：Valve plate after cleaning is fixed on fixture prevents deformation；First, mass ratio is adopted for 2：1 24 mesh
Sandblasting roughening is carried out to surface with 40 mesh Brown Alundum sand grains；Sandblasting is required：Compressed air drying, oil-free used by sandblasting, air pressure is about
0.6MPa, jet angle is 80 °, and sandblasting distance is 0.15m, and sandblasting is to the uniform no-reflection in valve plate surface；
（4）It is prepared by coating:High-performance abrasion-proof coating, thickness are prepared on valve plate surface using HVAF technique
0.25mm, spraying combustion gas used is propane, and combustion-supporting gas is compressed air, while the use of argon gas or nitrogen being carrier gas, aids in gas
Body is hydrogen；Valve plate surface needs preheating, 80 DEG C of valve plate surface temperature after preheating, valve plate surface in spraying process during first spraying
180 DEG C of temperature, prevents coating overheated and valve plate deformation by the way of multiple tracks spraying and pressure-air cooling, in spraying process,
Require propane pressure 0.48MPa, air pressure 0.58MPa, nebulizer gas pressure 0.83MPa, the L/min of carrier gas flux 30, Hydrogen Vapor Pressure
0.76MPa, the L/min of hydrogen flowing quantity 25, the g/min of powder feed rate 20, spray distance 180mm, 75 ° of spray angle, spraying rate
500 mm/s, spray step pitch 2mm, chamber pressure 0.35MPa；
（5）Attrition process：Meet Dimension of Valve Plate precision, flatness and surface roughness by attrition process to require.
Step（1）The processing method of middle employing milling or mill is totally thinning by valve plate thickness.
Step（2）Middle employing acetone or absolute ethyl alcohol are cleaned to valve plate surface.
Step（5）In adopt 80 mesh skives to roughly grind metal ceramic wear-resisting coating, grinding speed 20m/s,
Depth of cut 0.01mm, the skive after corase grind using 240 mesh is refined to metal-cermic coating, grinding speed 25m/s,
The depth of cut about 0.01mm.
Embodiment 5
A kind of EB furnace apparatus gate valve plate wear-resistant coating, each composition of the wear-resistant coating and its mass percent are：Cr3C2
80%, Cr 4%, Ni16%.
The spraying coating process of the EB furnace apparatus gate valve plate wear-resistant coating, it is characterised in that：Comprise the following steps：
（1）Surface Machining：By the overall thinning 0.5mm of valve plate thickness, using as the reserved of valve plate two sides coating layer thickness；
（2）Surface clean：Valve plate surface is cleaned, surface is removed because machining brought greasy dirt；
（3）Sandblasting is roughened：Valve plate after cleaning is fixed on fixture prevents deformation；First, mass ratio is adopted for 2：1 24 mesh
Sandblasting roughening is carried out to surface with 40 mesh Brown Alundum sand grains；Sandblasting is required：Compressed air drying, oil-free used by sandblasting, air pressure is about
0.8MPa, jet angle is 100 °, and sandblasting distance is 0.2m, and sandblasting is to the uniform no-reflection in valve plate surface；
（4）It is prepared by coating:High-performance abrasion-proof coating, thickness are prepared on valve plate surface using HVAF technique
0.40mm, spraying combustion gas used is propane, and combustion-supporting gas is compressed air, while the use of argon gas or nitrogen being carrier gas, aids in gas
Body is hydrogen；Valve plate surface needs preheating during first spraying, and valve plate surface temperature answers >=80 DEG C after preheating, valve plate in spraying process
Surface temperature answers 170 DEG C, prevents coating overheated by the way of multiple tracks spraying and pressure-air cooling and valve plate deformation, spray coated
Cheng Zhong, it is desirable to propane pressure 0.60MPa, air pressure 0.70MPa, nebulizer gas pressure 1.0MPa, the L/min of carrier gas flux 50, hydrogen
Pressure 1.0MPa, the L/min of hydrogen flowing quantity 50, the g/min of powder feed rate 50, the mm of spray distance 250,90 ° of spray angle, spraying
The mm/s of speed 1000, sprays the mm of step pitch 5, chamber pressure 0.50MPa；
（5）Attrition process：Meet Dimension of Valve Plate precision, flatness and surface roughness by attrition process to require.
Step（1）The processing method of middle employing milling or mill is totally thinning by valve plate thickness.
Step（2）Middle employing acetone or absolute ethyl alcohol are cleaned to valve plate surface.
Step（5）In adopt 120 mesh skives to roughly grind metal ceramic wear-resisting coating, grinding speed 20 ~
30m/s, depth of cut 0.03mm, the skive after corase grind using 320 mesh is refined to metal-cermic coating, grinding speed
40m/s, the depth of cut about 0.01mm.
Embodiment 6
A kind of EB furnace apparatus gate valve plate wear-resistant coating, each composition of the wear-resistant coating and its mass percent are：
Cr3C270%, Cr 48%, Ni22%.
The spraying coating process of the EB furnace apparatus gate valve plate wear-resistant coating, it is characterised in that：Comprise the following steps：
（1）Surface Machining：By the overall thinning 0.4mm of valve plate thickness, using as the reserved of valve plate two sides coating layer thickness；
（2）Surface clean：Valve plate surface is cleaned, surface is removed because machining brought greasy dirt；
（3）Sandblasting is roughened：Valve plate after cleaning is fixed on fixture prevents deformation；First, mass ratio is adopted for 2：1 24 mesh
Sandblasting roughening is carried out to surface with 40 mesh Brown Alundum sand grains；Sandblasting is required：Compressed air drying, oil-free used by sandblasting, air pressure is about
0.7MPa, jet angle is 85 °, and sandblasting distance is 0.18m, and sandblasting is to the uniform no-reflection in valve plate surface；
（4）It is prepared by coating:High-performance abrasion-proof coating, thickness are prepared on valve plate surface using HVAF technique
0.3mm, spraying combustion gas used is propane, and combustion-supporting gas is compressed air, while the use of argon gas or nitrogen being carrier gas, aids in gas
For hydrogen；Valve plate surface needs preheating during first spraying, and valve plate surface temperature answers >=80 DEG C after preheating, valve plate table in spraying process
Face temperature answers 175 DEG C, prevents coating overheated by the way of multiple tracks spraying and pressure-air cooling and valve plate deformation, spraying process
In, it is desirable to propane pressure 0.55MPa, air pressure 0.62MPa, nebulizer gas pressure 0.90MPa, the L/min of carrier gas flux 40, hydrogen
Pressure 0.90MPa, the L/min of hydrogen flowing quantity 40, powder feed rate 30g/min, spray distance 200mm, 80 ° of spray angle, spraying speed
800 mm/s are spent, step pitch 3mm, chamber pressure 0.42MPa is sprayed；（5）Attrition process：Dimension of Valve Plate essence is made by attrition process
Degree, flatness and surface roughness meet requirement.
Step（1）The processing method of middle employing milling or mill is totally thinning by valve plate thickness.
Step（2）Middle employing acetone or absolute ethyl alcohol are cleaned to valve plate surface.
Step（5）In adopt 100 mesh skives to roughly grind metal ceramic wear-resisting coating, grinding speed 25m/s,
Depth of cut 0.02mm, the skive after corase grind using 300 mesh is refined to metal-cermic coating, grinding speed 50m/s,
The depth of cut about 0.01mm.
Claims (5)
1. a kind of EB furnace apparatus gate valve plate wear-resistant coating, it is characterised in that：Each composition of the wear-resistant coating and its quality
Percentage is：Cr3C2 50 ~ 80%, Cr 4 ~ 10%, Ni 16 ~ 40%.
2. the spraying coating process of EB furnace apparatus gate valve plate wear-resistant coating as claimed in claim 1, it is characterised in that：Including following
Step：
（1）Surface Machining：By the thinning 0.3～0.5mm of valve plate thickness, using as the reserved of valve plate two sides coating layer thickness；
（2）Surface clean：Valve plate surface is cleaned, surface is removed because machining brought greasy dirt；
（3）Sandblasting is roughened：Valve plate after cleaning is fixed on fixture prevents deformation；First, mass ratio is adopted for 2：1 24 mesh
Sandblasting roughening is carried out to surface with 40 mesh Brown Alundum sand grains；Sandblasting is required：Compressed air drying, oil-free used by sandblasting, air pressure 0.6
~ 0.8MPa, jet angle is 90 ± 10 °, and sandblasting distance is 0.15 ~ 0.2m, and sandblasting is to the uniform no-reflection in valve plate surface；
（4）It is prepared by coating:High-performance abrasion-proof coating is prepared on valve plate surface using HVAF technique, thickness 0.25 ~
0.40mm, spraying combustion gas used is propane, and combustion-supporting gas is compressed air, while the use of argon gas or nitrogen being carrier gas, aids in gas
Body is hydrogen；Valve plate surface needs preheating, valve plate surface temperature >=80 DEG C after preheating, valve plate table in spraying process during first spraying
Face temperature≤180 DEG C, prevent coating overheated and valve plate deformation, spraying process by the way of multiple tracks spraying and pressure-air cooling
In, it is desirable to 0.5 ~ 0.6MPa of propane pressure, 0.55 ~ 0.7MPa of air pressure, 0.8 ~ 1.0MPa of nebulizer gas pressure, carrier gas flux 30 ~
50 L/min, 0.75 ~ 1.0MPa of Hydrogen Vapor Pressure, the L/min of hydrogen flowing quantity 25 ~ 50, the g/min of powder feed rate 20 ~ 50, spray distance
180 ~ 250 mm, 75 ~ 90 ° of spray angle, the mm/s of spraying rate 500 ~ 1000, the spraying mm of step pitch 2 ~ 5, chamber pressure 0.3 ~
0.5MPa；（5）Attrition process：Meet Dimension of Valve Plate precision, flatness and surface roughness by attrition process to require.
3. the spraying coating process of EB furnace apparatus gate valve plate wear-resistant coating as claimed in claim 2, it is characterised in that：Step（1）
The processing method of middle employing milling or mill is totally thinning by valve plate thickness.
4. the spraying coating process of EB furnace apparatus gate valve plate wear-resistant coating as claimed in claim 2, it is characterised in that：Step（2）
Middle employing acetone or absolute ethyl alcohol are cleaned to valve plate surface.
5. the spraying coating process of EB furnace apparatus gate valve plate wear-resistant coating as claimed in claim 2, it is characterised in that：Step（5）
In adopt 80 ~ 120 mesh skives to roughly grind metal ceramic wear-resisting coating, 20 ~ 30m/s of grinding speed, the depth of cut
0.01 ~ 0.03mm, the skive after corase grind using 240 ~ 320 mesh is refined to metal-cermic coating, and grinding speed 25 ~
40m/s, depth of cut 0.01mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710083932.0A CN106637035A (en) | 2017-02-16 | 2017-02-16 | Wear-resistant coating on valve plate of EB furnace equipment gate valve, and spraying technology thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710083932.0A CN106637035A (en) | 2017-02-16 | 2017-02-16 | Wear-resistant coating on valve plate of EB furnace equipment gate valve, and spraying technology thereof |
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| CN201710083932.0A Pending CN106637035A (en) | 2017-02-16 | 2017-02-16 | Wear-resistant coating on valve plate of EB furnace equipment gate valve, and spraying technology thereof |
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| CN110616393A (en) * | 2019-10-31 | 2019-12-27 | 西华大学 | Valve overflowing surface wear-resistant corrosion-resistant spray coating and preparation method thereof |
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| CN111690923A (en) * | 2020-05-28 | 2020-09-22 | 金湖县赛欧电气有限公司 | Method for supersonic spraying tungsten carbide alloy on sealing surface of valve plate and valve seat |
| CN113755780A (en) * | 2021-08-09 | 2021-12-07 | 中国船舶重工集团公司第七二五研究所 | Composite coating for titanium alloy gasket and preparation method thereof |
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| CN105543760A (en) * | 2015-12-22 | 2016-05-04 | 上海开维喜集团股份有限公司 | Preparation method of abrasion-resistant coating of sealing surface of high-temperature and high-pressure oxygen valve |
| CN109763088A (en) * | 2019-01-25 | 2019-05-17 | 上海电气风电集团有限公司 | A method of improving electric arc thermal jet spelter coating adhesive force |
| CN110616393A (en) * | 2019-10-31 | 2019-12-27 | 西华大学 | Valve overflowing surface wear-resistant corrosion-resistant spray coating and preparation method thereof |
| CN110842470A (en) * | 2019-10-31 | 2020-02-28 | 苏州佳兆精密机械有限公司 | Method for processing cross beam of printing machine |
| CN110616393B (en) * | 2019-10-31 | 2021-09-07 | 西华大学 | Valve overflowing surface wear-resistant corrosion-resistant spray coating and preparation method thereof |
| CN111690923A (en) * | 2020-05-28 | 2020-09-22 | 金湖县赛欧电气有限公司 | Method for supersonic spraying tungsten carbide alloy on sealing surface of valve plate and valve seat |
| CN113755780A (en) * | 2021-08-09 | 2021-12-07 | 中国船舶重工集团公司第七二五研究所 | Composite coating for titanium alloy gasket and preparation method thereof |
| CN117265455A (en) * | 2023-11-22 | 2023-12-22 | 上海开维喜阀门有限公司 | Thermal spraying process for wear-resistant valve plate with flow guiding device |
| CN117265455B (en) * | 2023-11-22 | 2024-01-23 | 上海开维喜阀门有限公司 | Thermal spraying process for wear-resistant valve plate with flow guiding device |
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