CN105543760A - Preparation method of abrasion-resistant coating of sealing surface of high-temperature and high-pressure oxygen valve - Google Patents
Preparation method of abrasion-resistant coating of sealing surface of high-temperature and high-pressure oxygen valve Download PDFInfo
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- CN105543760A CN105543760A CN201510968603.5A CN201510968603A CN105543760A CN 105543760 A CN105543760 A CN 105543760A CN 201510968603 A CN201510968603 A CN 201510968603A CN 105543760 A CN105543760 A CN 105543760A
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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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/0641—Nitrides
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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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/34—Sputtering
- C23C14/35—Sputtering by application of a magnetic field, e.g. magnetron sputtering
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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
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/32—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer
- C23C28/324—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer with at least one metal matrix material layer comprising a mixture of at least two metals or metal phases or a metal-matrix material with hard embedded particles, e.g. WC-Me
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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
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/34—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates
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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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Abstract
The invention discloses a preparation method of an abrasion-resistant coating of the sealing surface of a high-temperature and high-pressure oxygen valve. The preparation method comprises the following steps that S100, a ball base body is pretreated; S200, a bottom layer of the coating is prepared through a hypersonic flame spraying technique; S300, a ball is milled and ground; S400, ultrasonic cleaning is conducted on the ball; S500, ion cleaning is conducted on the ball; and S600, a surface layer of the coating is prepared on the surface of the ball through a magnetron sputtering technique. The preparation method of the abrasion-resistant coating of the sealing surface of the high-temperature and high-pressure oxygen valve has the advantages that the abrasion-resistant coating prepared on the surface of the ball of the high-temperature and high-pressure oxygen valve through the method is high in hardness, good in abrasion resistance, low in friction coefficient, compact and free of pores, and leakage of the valve is completely avoided when pressure testing is conducted in a high-pressure state.
Description
Technical field
The present invention relates to wear-resistant coating and preparing technical field thereof, particularly a kind of preparation method of High Temperature High Pressure oxygen valve sealing surface wear-resistant coating.
Background technology
Along with developing rapidly of the modernization of industry, the parameter of large-scale petrochemical device, chemical plant installations is improving constantly, the parameter area of High Temperature High Pressure oxygen valve is also improving constantly, the demand of oxygen valve and range of needs are also in continuous expansion, High Temperature High Pressure oxygen valve has become one of key equipment in large-scale petrochemical device, chemical plant installations, the quality of its performance directly affects safety, the reliability service of complete assembly, affects the quality of producing product.
In actual use, under high-temperature high-pressure state, purity oxygen causes stress corrosion and oxidation corrosion to valve body, also there is the frictional wear between trim under seal pressure effect and spheroid simultaneously, causes sealing surface wear serious and causes leaking.In order to ensure the stopping property of High Temperature High Pressure oxygen valve, extending its service life, valve sealing face wear resistance and corrosion resistance should be improved as far as possible, reducing its frictional coefficient.
Surface engineering technology is that the one that high-end valve generally adopts is improved the quality of products, the advanced technologies in reenlist life-span.At present, the valve products overwhelming majority adopts common flame spray remolten technology or hypersonic flame spraying technology to prepare wear-resistant coating on its surface, but for High Temperature High Pressure oxygen valve, the nichrome (Inconelxxx) that its body material generally adopts USS ASTMA494 to specify or corronel (Monelxxx), traditional flame spray-fusing technology is also not suitable for this kind of body material, and adopts hypersonic flame spraying technology to prepare single WC or Cr
3c
2, due to its process characteristic, in coating, there is the hole of about 1%, use in a high voltage state and cannot ensure valve 100% No leakage in coating.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of preparation method of High Temperature High Pressure oxygen valve sealing surface wear-resistant coating, improves valve sealing face wear resistance, reduces frictional coefficient, extends its service life.
To achieve these goals, the invention provides a kind of preparation method of High Temperature High Pressure oxygen valve sealing surface wear-resistant coating, order comprises the following steps:
S100, spheroid substrate pretreated;
S200, use hypersonic flame spraying technique prepare coating bottom;
S300, spheroid grinding, grinding;
S400, ultrasonic cleaning spheroid;
S500, Ion Cleaning spheroid;
S600, employing magnetron sputtering technique prepare coating surface layer at spherome surface;
Above-mentioned method, wherein, in described step S100, comprises step:
S110, adopts cotton or mane bruss to dip acetone wash-out valve spherome surface greasy dirt; And
S120, adopt jet absorption type sandblast machine to carry out sandblasting alligatoring to spherome surface, sand grains selects 24 ~ 60 order white fused aluminas, described sandblast texturing processing parameter: sandblasting distance 80 ~ 100mm, sandblasting angle 45 ~ 60 °, compressed air pressure 0.2 ~ 0.4MPa.
Above-mentioned method, wherein, in described step S200, comprises step:
S210, preferred 25%NiCr-Cr
3c
2powder is as wear-resistant coating bottom dusty spray, and powder size 15 ~ 45um, to be positioned over powder in air dry oven before spraying and to carry out drying, drying temperature 90 ~ 100 DEG C, time of drying 2 ~ 3h;
S220, is arranged on ball body of valve on horizontal revolving table, adopts hypersonic flame spraying technique to prepare wear-resistant coating on ball body of valve surface.The processing parameter of described hypersonic flame spraying is: oxygen flow: 1800 ~ 2000scfh, kerosene oil flow: 5 ~ 6.5gph, carrier gas flux: 19 ~ 23scfh, powder feeding rate: 5 ~ 8rpm, spray distance: 350 ~ 380mm, spray gun translational speed 40 ~ 50m/min, preheating temperature is 90 ~ 120 DEG C, and described wear-resistant coating underlayer thickness is 250 ~ 300um.
Above-mentioned method, wherein, in described step S300, comprises step:
S310, is arranged on the ball body of valve sprayed on spherical grinding machine, and adopt cubic boron nitride abrasive wheel that ball body of valve is ground to drawing requirement size, described grinding process parameters is: cubic boron nitride abrasive wheel granularity: 80 ~ 100
#, rotating wheel: 25 ~ 35m/s, axial feeding: 0.5 ~ 1m/min, spheroid speed of rotation: 10 ~ 20m/min;
S320, is placed on grinding tool by the frock that grinding is good, and spheroid coordinates with valve seat and grinds, and preferred diamond paste is as abrasive;
Above-mentioned method, wherein, in described step S400, comprises step:
S410, carries out ultrasonic cleaning through sanitising agent, tap water, acetone, deionized water successively by ground ball body of valve, and each operation scavenging period is 10 ~ 15min;
S420, dries the ball body of valve after ultrasonic cleaning, bake out temperature: 90 ~ 120 DEG C, drying time 10 ~ 15min in an oven;
Above-mentioned method, wherein, in described step S500, comprises step:
S510, loads magnetron sputtering vacuum chamber swinging strut by the ball body of valve after drying, is evacuated to 2 ~ 5 × 10
-1pa, then passes into Ar gas to vacuum chamber;
S520, opens swinging strut and grid bias power supply when vacuum chamber pressure is 2 ~ 5Pa, utilizes argon ion to clean workpiece surface, scavenging period 10 ~ 15min;
Above-mentioned method, wherein, in described step S600, comprises step:
S610, passes into N
2gas, prepares CrN surface layer at spherome surface, and described CrN surface layer preparation technology parameter is: Ar:N
2throughput ratio is between 1:1.5 ~ 1:3, work total gas pressure: 0.5 ~ 10Pa, negative bias :-200 ~-800V, arc current: 50 ~ 80A, depositing temperature: 250 ~ 350 DEG C, depositing time: 45 ~ 60min.
Beneficial functional of the present invention is:
The wear-resistant coating hardness using the present invention to prepare on High Temperature High Pressure oxygen valve sphere surface is high, wear resistance good, and frictional coefficient is low, coating dense non-porous gap, pressure testing valve 100% No leakage under high pressure conditions.
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Accompanying drawing explanation
Fig. 1 is preparation method's schema of the High Temperature High Pressure oxygen valve sealing surface wear-resistant coating of the application;
Fig. 2 is High Temperature High Pressure oxygen valve coating performance and the leakage test result of the application.
Embodiment
Below in conjunction with accompanying drawing embodiment, the present invention is described in further detail, it is pointed out that the following stated embodiment is intended to be convenient to the understanding of the present invention, and any restriction effect is not play to it.
Embodiment 1:
In the present embodiment, ball body of valve material selection MonelK500, valve specified size is 1 inch, and prepare composite anti-wear coating at this spherome surface, preparation method is specific as follows:
(1) utilize mane bruss to dip acetone soln the MonelK500 ball body of valve surface and oil contaminant processed is cleaned up;
(2) be arranged on sandblasting special tooling by the ball body of valve after cleaning, utilize jet absorption type automatic blasting equipment to carry out frosting treatment to spheroid, preferred white fused alumina is as sand-blast material, sand grains particle diameter 32 order, sandblasting distance 100mm, sandblasting angle 45 °, compressed air pressure 0.2MPa.
(3) ball body of valve after sandblast texturing is arranged in hypersonic flame spraying frock, adopts supersonic spray gun to spray ball body of valve, the preferred 25%NiCr-Cr of spray material
3c
2powder, powder size 15 ~ 45um, before spraying, powder is fully dry.Open supersonic spray gun, not automatic powder feeding system is adopted to carry out preheating to ball body of valve, preheating temperature 90 ~ 120 DEG C (adopting infrared thermometer to detect preheating temperature), open powder feeder when ball body of valve temperature reaches setting preheating temperature and start spraying, spray parameters is as follows: oxygen flow: 1850scfh, kerosene oil flow: 5.5gph, carrier gas flux: 19scfh, powder feeding rate: 5rpm, spray distance: 380mm, spray gun translational speed 50m/min.Circulation spraying is until coat-thickness reaches 250 ~ 300um.
(4) ball body of valve after having sprayed is arranged on spherical grinding machine, adopts 80
#cubic boron nitride abrasive wheel carries out grinding, rotating wheel: 35m/s, axial feeding: 0.5m/min, spheroid speed of rotation: 20m/min;
(5) ball body of valve being ground to drawing specified dimension is coordinated with corresponding valve seat be arranged on grinding tool, select W20, W10, W5 tri-kinds of specification diamond pastes to grind trim;
(6) ground ball body of valve is carried out ultrasonic cleaning through sanitising agent, tap water, acetone, deionized water successively, each operation scavenging period is 15min, ball body of valve after cleaned is put into loft drier and is carried out drying, drying temperature 90 DEG C, time of drying 15min;
(7) spheroid after cleaned is loaded magnetron sputtering vacuum chamber swinging strut, be evacuated to 5 × 10
-1pa, then passes into high-purity Ar gas to vacuum chamber, opens swinging strut and grid bias power supply, utilize argon ion to clean workpiece surface, scavenging period 15min when vacuum chamber pressure reaches 2Pa;
(8) N is passed into
2gas, Ar:N
2throughput ratio is 1:1.5, work total gas pressure: 0.5Pa, at ball body of valve surface preparation CrN surface layer, and setting negative bias :-200V, arc current: 50A, depositing temperature: 350 DEG C, depositing time: 45min.
(9), after deposition terminates, ball body of valve cools to less than 50 DEG C taking-ups with the furnace, and ball body of valve surface can obtain fine and close wear-resistant coating.Carry out micro-hardness testing and PVvalue testing to the coating of preparation, ball body of valve as shown in Figure 2, is arranged on valve body and utilizes pure N by measured result
2carry out leakage test, test pressure chooses low pressure 0.6MPa respectively, and middle pressure 6.3MPa and high pressure 15MPa, pressure testing the results are shown in Figure shown in 2.
Embodiment 2:
In the present embodiment, ball body of valve material selection MonelK500, valve specified size is 2 inches, and prepare composite anti-wear coating at this spherome surface, preparation method is specific as follows:
(1) utilize mane bruss to dip acetone soln the MonelK500 ball body of valve surface and oil contaminant processed is cleaned up;
(2) be arranged on sandblasting special tooling by the ball body of valve after cleaning, utilize jet absorption type automatic blasting equipment to carry out frosting treatment to spheroid, preferred white fused alumina is as sand-blast material, sand grains particle diameter 24 order, sandblasting distance 80mm, sandblasting angle 45 °, compressed air pressure 0.4MPa.
(3) ball body of valve after sandblast texturing is arranged in hypersonic flame spraying frock, adopts supersonic spray gun to spray ball body of valve, the preferred 25%NiCr-Cr of spray material
3c
2powder, powder size 15 ~ 45um, before spraying, powder is fully dry.Open supersonic spray gun, not automatic powder feeding system is adopted to carry out preheating to ball body of valve, preheating temperature 90 ~ 120 DEG C (adopting infrared thermometer to detect preheating temperature), open powder feeder when ball body of valve temperature reaches setting preheating temperature and start spraying, spray parameters is as follows: oxygen flow: 2000scfh, kerosene oil flow: 6.5gph, carrier gas flux: 22scfh, powder feeding rate: 7rpm, spray distance: 350mm, spray gun translational speed 40m/min.Circulation spraying is until coat-thickness reaches 250 ~ 300um.
(4) ball body of valve after having sprayed is arranged on spherical grinding machine, adopts 80
#cubic boron nitride abrasive wheel carries out grinding, rotating wheel: 30m/s, axial feeding: 0.5m/min, spheroid speed of rotation: 15m/min;
(5) ball body of valve being ground to drawing specified dimension is coordinated with corresponding valve seat be arranged on grinding tool, select W20, W10, W5 tri-kinds of specification diamond pastes to grind trim;
(6) ground ball body of valve is carried out ultrasonic cleaning through sanitising agent, tap water, acetone, deionized water successively, each operation scavenging period is 15min, ball body of valve after cleaned is put into loft drier and is carried out drying, drying temperature 90 DEG C, time of drying 15min;
(7) spheroid after cleaned is loaded magnetron sputtering vacuum chamber swinging strut, be evacuated to 5 × 10
-1pa, then passes into high-purity Ar gas to vacuum chamber, opens swinging strut and grid bias power supply, utilize argon ion to clean workpiece surface, scavenging period 15min when vacuum chamber pressure reaches 5Pa;
(8) N is passed into
2gas, Ar:N
2throughput ratio is 1:3, work total gas pressure: 6Pa, at ball body of valve surface preparation CrN surface layer, and setting negative bias :-700V, arc current: 75A, depositing temperature: 350 DEG C, depositing time: 60min.
(9), after deposition terminates, ball body of valve cools to less than 50 DEG C taking-ups with the furnace, and ball body of valve surface can obtain fine and close wear-resistant coating.Carry out micro-hardness testing and PVvalue testing to the coating of preparation, ball body of valve as shown in Figure 2, is arranged on valve body and utilizes pure N by measured result
2carry out leakage test, test pressure chooses low pressure 0.6MPa respectively, and middle pressure 6.3MPa and high pressure 15MPa, pressure testing the results are shown in Figure shown in 2.
Embodiment 3:
In the present embodiment, ball body of valve material selection Inconel625, valve specified size is 1 inch, and prepare composite anti-wear coating at this spherome surface, preparation method is specific as follows:
(1) utilize mane bruss to dip acetone soln the Inconel625 ball body of valve surface and oil contaminant processed is cleaned up;
(2) be arranged on sandblasting special tooling by the ball body of valve after cleaning, utilize jet absorption type automatic blasting equipment to carry out frosting treatment to spheroid, preferred white fused alumina is as sand-blast material, sand grains particle diameter 32 order, sandblasting distance 80mm, sandblasting angle 60 °, compressed air pressure 0.3MPa.
(3) ball body of valve after sandblast texturing is arranged in hypersonic flame spraying frock, adopts supersonic spray gun to spray ball body of valve, the preferred 25%NiCr-Cr of spray material
3c
2powder, powder size 15 ~ 45um, before spraying, powder is fully dry.Open supersonic spray gun, not automatic powder feeding system is adopted to carry out preheating to ball body of valve, preheating temperature 90 ~ 120 DEG C (adopting infrared thermometer to detect preheating temperature), open powder feeder when ball body of valve temperature reaches setting preheating temperature and start spraying, spray parameters is as follows: oxygen flow: 1900scfh, kerosene oil flow: 5.5gph, carrier gas flux: 23scfh, powder feeding rate: 6rpm, spray distance: 360mm, spray gun translational speed 50m/min.Circulation spraying is until coat-thickness reaches 250 ~ 300um.
(4) ball body of valve after having sprayed is arranged on spherical grinding machine, adopts 80
#cubic boron nitride abrasive wheel carries out grinding, rotating wheel: 35m/s, axial feeding: 1m/min, spheroid speed of rotation: 20m/min;
(5) ball body of valve being ground to drawing specified dimension is coordinated with corresponding valve seat be arranged on grinding tool, select W20, W10, W5 tri-kinds of specification diamond pastes to grind trim;
(6) ground ball body of valve is carried out ultrasonic cleaning through sanitising agent, tap water, acetone, deionized water successively, each operation scavenging period is 15min, ball body of valve after cleaned is put into loft drier and is carried out drying, drying temperature 90 DEG C, time of drying 15min;
(7) spheroid after cleaned is loaded magnetron sputtering vacuum chamber swinging strut, be evacuated to 5 × 10
-1pa, then passes into high-purity Ar gas to vacuum chamber, opens swinging strut and grid bias power supply, utilize argon ion to clean workpiece surface, scavenging period 15min when vacuum chamber pressure reaches 5Pa;
(8) N is passed into
2gas, Ar:N
2throughput ratio is 1:2, work total gas pressure: 8Pa, at ball body of valve surface preparation CrN surface layer, and setting negative bias :-800V, arc current: 80A, depositing temperature: 350 DEG C, depositing time: 60min.
(9), after deposition terminates, ball body of valve cools to less than 50 DEG C taking-ups with the furnace, and ball body of valve surface can obtain fine and close wear-resistant coating.
Embodiment 4:
In the present embodiment, ball body of valve material selection Inconel600, valve specified size is 2 inches, and prepare composite anti-wear coating at this spherome surface, preparation method is specific as follows:
(1) utilize mane bruss to dip acetone soln the Inconel600 ball body of valve surface and oil contaminant processed is cleaned up;
(2) be arranged on sandblasting special tooling by the ball body of valve after cleaning, utilize jet absorption type automatic blasting equipment to carry out frosting treatment to spheroid, preferred white fused alumina is as sand-blast material, sand grains particle diameter 24 order, sandblasting distance 100mm, sandblasting angle 60 °, compressed air pressure 0.4MPa.
(3) ball body of valve after sandblast texturing is arranged in hypersonic flame spraying frock, adopts supersonic spray gun to spray ball body of valve, the preferred 25%NiCr-Cr of spray material
3c
2powder, powder size 15 ~ 45um, before spraying, powder is fully dry.Open supersonic spray gun, not automatic powder feeding system is adopted to carry out preheating to ball body of valve, preheating temperature 90 ~ 120 DEG C (adopting infrared thermometer to detect preheating temperature), open powder feeder when ball body of valve temperature reaches setting preheating temperature and start spraying, spray parameters is as follows: oxygen flow: 2000scfh, kerosene oil flow: 6.5gph, carrier gas flux: 20scfh, powder feeding rate: 8rpm, spray distance: 350mm, spray gun translational speed 50m/min.Circulation spraying is until coat-thickness reaches 250 ~ 300um.
(4) ball body of valve after having sprayed is arranged on spherical grinding machine, adopts 80
#cubic boron nitride abrasive wheel carries out grinding, rotating wheel: 25m/s, axial feeding: 0.5m/min, spheroid speed of rotation: 20m/min;
(5) ball body of valve being ground to drawing specified dimension is coordinated with corresponding valve seat be arranged on grinding tool, select W20, W10, W5 tri-kinds of specification diamond pastes to grind trim;
(6) ground ball body of valve is carried out ultrasonic cleaning through sanitising agent, tap water, acetone, deionized water successively, each operation scavenging period is 15min, ball body of valve after cleaned is put into loft drier and is carried out drying, drying temperature 90 DEG C, time of drying 15min;
(7) spheroid after cleaned is loaded magnetron sputtering vacuum chamber swinging strut, be evacuated to 5 × 10
-1pa, then passes into high-purity Ar gas to vacuum chamber, opens swinging strut and grid bias power supply, utilize argon ion to clean workpiece surface, scavenging period 15min when vacuum chamber pressure reaches 5Pa;
(8) N is passed into
2gas, Ar:N
2throughput ratio is 1:1.5, work total gas pressure: 10Pa, at ball body of valve surface preparation CrN surface layer, and setting negative bias :-200V, arc current: 50A, depositing temperature: 350 DEG C, depositing time: 60min.
(9), after deposition terminates, ball body of valve cools to less than 50 DEG C taking-ups with the furnace, and ball body of valve surface can obtain fine and close wear-resistant coating.
High Temperature High Pressure oxygen valve sphere surface wearable coating compact structure prepared by the present invention, imporosity exist, coating hardness is high, wear resistance good, frictional coefficient is little, efficiently solve High Temperature High Pressure oxygen valve sealing surface problem easy to wear, extend High Temperature High Pressure oxygen valve service life, reduce petrochemical industry maintenance cost, for petrochemical industry brings considerable economic benefit simultaneously.
Certainly; the present invention also can have other various embodiments; when not deviating from the present invention's spirit and essence thereof; those of ordinary skill in the art are when making various corresponding change and distortion according to the present invention, but these change accordingly and are out of shape the protection domain that all should belong to the claim appended by the present invention.
Claims (7)
1. a preparation method for High Temperature High Pressure oxygen valve sealing surface wear-resistant coating, comprises the following steps:
S100, spheroid substrate pretreated;
S200, use hypersonic flame spraying technique prepare coating bottom;
S300, spheroid grinding, grinding;
S400, ultrasonic cleaning spheroid;
S500, Ion Cleaning spheroid;
S600, employing magnetron sputtering technique prepare coating surface layer at spherome surface.
2. the preparation method of High Temperature High Pressure oxygen valve sealing surface wear-resistant coating according to claim 1, is characterized in that: in described step S100, comprise the following steps:
S110, adopts cotton or mane bruss to dip acetone wash-out valve spherome surface greasy dirt; And
S120, adopt jet absorption type sandblast machine to carry out sandblasting alligatoring to spherome surface, sand grains selects 24 ~ 60 order white fused aluminas, described sandblast texturing processing parameter: sandblasting distance 80 ~ 100mm, sandblasting angle 45 ~ 60 °, compressed air pressure 0.2 ~ 0.4MPa.
3. the preparation method of High Temperature High Pressure oxygen valve sealing surface wear-resistant coating according to claim 1, is characterized in that: in described step S200, comprise the following steps:
S210, preferred 25%NiCr-Cr
3c
2powder is as wear-resistant coating bottom dusty spray, and powder size 15 ~ 45um, to be positioned over powder in air dry oven before spraying and to carry out drying, drying temperature 90 ~ 100 DEG C, time of drying 2 ~ 3h;
S220, is arranged on ball body of valve on horizontal revolving table, adopts hypersonic flame spraying technique to prepare wear-resistant coating on ball body of valve surface; The processing parameter of described hypersonic flame spraying is: oxygen flow: 1800 ~ 2000scfh, kerosene oil flow: 5 ~ 6.5gph, carrier gas flux: 19 ~ 23scfh, powder feeding rate: 5 ~ 8rpm, spray distance: 350 ~ 380mm, spray gun translational speed 40 ~ 50m/min, preheating temperature is 90 ~ 120 DEG C, and described wear-resistant coating underlayer thickness is 250 ~ 300um.
4. the preparation method of High Temperature High Pressure oxygen valve sealing surface wear-resistant coating according to claim 1, is characterized in that: in described step S300, comprise the following steps:
S310, is arranged on the ball body of valve sprayed on spherical grinding machine, and adopt cubic boron nitride abrasive wheel that ball body of valve is ground to drawing requirement size, described grinding process parameters is: cubic boron nitride abrasive wheel granularity: 80 ~ 100
#, rotating wheel: 25 ~ 35m/s, axial feeding: 0.5 ~ 1m/min, spheroid speed of rotation: 10 ~ 20m/min;
S320, is placed on grinding tool by the frock that grinding is good, and spheroid coordinates with valve seat and grinds, and preferred diamond paste is as abrasive.
5. the preparation method of High Temperature High Pressure oxygen valve sealing surface wear-resistant coating according to claim 1, is characterized in that: in described step S400, comprise the following steps:
S410, carries out ultrasonic cleaning through sanitising agent, tap water, acetone, deionized water successively by ground ball body of valve, and each operation scavenging period is 10 ~ 15min;
S420, dries the ball body of valve after ultrasonic cleaning, bake out temperature: 90 ~ 120 DEG C, drying time 10 ~ 15min in an oven.
6. the preparation method of High Temperature High Pressure oxygen valve sealing surface wear-resistant coating according to claim 1, is characterized in that: in described step S500, comprise the following steps:
S510, loads magnetron sputtering vacuum chamber swinging strut by the ball body of valve after drying, is evacuated to 2 ~ 5 × 10
-1pa, then passes into Ar gas to vacuum chamber;
S520, opens swinging strut and grid bias power supply when vacuum chamber pressure is 2 ~ 5Pa, utilizes argon ion to clean workpiece surface, scavenging period 10 ~ 15min.
7. the preparation method of High Temperature High Pressure oxygen valve sealing surface wear-resistant coating according to claim 1, is characterized in that: in described step S600, comprise the following steps:
S610, passes into N
2gas, prepares CrN surface layer at spherome surface, and described CrN surface layer preparation technology parameter is: Ar:N
2throughput ratio is between 1:1.5 ~ 1:3, work total gas pressure: 0.5 ~ 10Pa, negative bias :-200 ~-800V, arc current: 50 ~ 80A, depositing temperature: 250 ~ 350 DEG C, depositing time: 45 ~ 60min.
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| CN109023365B (en) * | 2018-08-10 | 2020-05-26 | 广东省新材料研究所 | Lip-type oil seal rotating shaft wear-resistant antifriction composite coating and preparation method thereof |
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| RU2724230C1 (en) * | 2019-10-01 | 2020-06-22 | Вячеслав Петрович Гальченко | Method of supersonic thermoshock surface preparation and high-speed gas-dynamic and thermodiffusion application of protective coatings on articles and device for implementation thereof |
| 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 |
| 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 |
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Effective date of registration: 20161227 Address after: 201416 Shanghai city Fengxian District Zhelin Town Village Road No. 138 building 4 Applicant after: Shanghai Shengweixi Valve Co., Ltd. Address before: 201416 Shanghai city Fengxian District Zhelin Town Village Road No. 199 Applicant before: SHK VALVE GROUP CO., LTD. |
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Application publication date: 20160504 |