CN108642430A - A kind of process of surface treatment of slush pump pump shaft - Google Patents
A kind of process of surface treatment of slush pump pump shaft Download PDFInfo
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- CN108642430A CN108642430A CN201810468661.5A CN201810468661A CN108642430A CN 108642430 A CN108642430 A CN 108642430A CN 201810468661 A CN201810468661 A CN 201810468661A CN 108642430 A CN108642430 A CN 108642430A
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- pump shaft
- pump
- slush
- slush pump
- surface treatment
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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
-
- 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
-
- 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
- C23C4/10—Oxides, borides, carbides, nitrides or silicides; Mixtures thereof
- C23C4/11—Oxides
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
The invention belongs to mud pump technical fields, and in particular to a kind of process of surface treatment of slush pump pump shaft, the treatment process include：(1) it to pump shaft roughing in surface, is immersed into ethanol solution；(2) micron grade aluminum oxide, alumina in Nano level and metal nickel powder are mixed, is stirred evenly in rear blanking to agitator, silane coupling agent is added, after stirring evenly, placed it in dry under vacuum condition；Then it is heated under the protection of inert gas, grinds to obtain mixture of powders；(3) by the way of supersonic flame spraying by mixture of powders torch firing to pump shaft surface, the slush pump pump shaft that is surface-treated；The present invention is in the thermal spraying on surface micron grade aluminum oxide of slush pump pump shaft and the stuff and other stuff of alumina in Nano level, the method of the thermal spraying not only increases the compactness of pump shaft surface particle, it also further optimizes between particle, the stress state of interface, effectively raise the intensity and toughness of coating, it is ensured that the wear-resisting property of slush pump pump shaft.
Description
Technical field
The invention belongs to mud pump technical fields, and in particular to a kind of process of surface treatment of slush pump pump shaft.
Background technology
Slush pump is the heart of geological drilling equipment, it is one of the key equipment in the operations such as well cementation, pressure break, acidification,
It also plays an important role in the industries such as petrochemical industry, coal gas chemical engineering, power station, mining, ship.Slush pump category
In reciprocating pump, can transfer of highly viscous, high sediment concentration and the solid particle containing tempering property liquid.
The construction of slush pump include the impeller shaft Power Component that is set in the pump housing and the pump housing be formed by pump chamber and its
Interior impeller, feed inlet are set to a side end face of pump housing axial direction, are arranged between another axial side ports and pump shaft of the pump housing
There is sealing mechanism, oil chamber, impeller are equipped between the bearing side seal circle group and impeller side sealing ring group of the sealing mechanism
The direct sealing function of side seal circle group is on pump shaft and impeller rear end face.Common cognition in the prior art, when slush pump is defeated
When sending sticky material containing small particle, impeller high speed rotation, small particle can bring larger rush to the blade of impeller
Power is hit, in use for some time, the abrasion of partial blade is larger, or even the fracture of local blade occurs, in order to not influence mud
The quality of the production of stock pump, impeller is extremely important.In fact, in slush pump, the abrasion that pump shaft is subject to also can not be ignored, if pump
Axis is worn during long-term use and is not paid attention to timely, and the sealing performance of slush pump can be by prodigious shadow
It rings, the accident that equipment may be caused to damage, therefore, the surface treatment for slush pump pump shaft makes it have excellent wearability
Can, it is also the important topic that those skilled in the art are studied to extend its service life.
Invention content
For the problems of the prior art, the purpose of the present invention is to provide a kind of surface treatment works of slush pump pump shaft
Skill improves the surface strength of slush pump pump shaft, improves its wear-resisting property, it is ensured that the sealing performance of slush pump pump shaft extends mud
Pump the service life of pump shaft.
To achieve the goals above, the present invention is achieved by the following scheme：
A kind of process of surface treatment of slush pump pump shaft, includes the following steps：
(1) roughing in surface is carried out to pump shaft, is then immersed into rinse in the ethanol solution that mass fraction is 95%；
(2) it is 1 in mass ratio by micron grade aluminum oxide and alumina in Nano level：(3~5) it weighs and is put into high-speed mixer
3~5min of middle mixing, is subsequently added into the metal nickel powder of above-mentioned material total weight 0.1~0.5%, stirs evenly rear blanking to stirring
In bucket, silane coupling agent is added, after stirring evenly, places it in dry under vacuum condition；Then under the protection of inert gas
3~5h is heated at a temperature of 120~150 DEG C, then grinding obtains mixture of powders；
(3) using methane as auxiliary gas, mixture of powders in step (2) is sprayed by the way of supersonic flame spraying
It burns to the pump shaft surface in step (1), the slush pump pump shaft being surface-treated.
Preferably, in step (1), the method for pump shaft roughing in surface is one in sandblasting, cutting thread, annular knurl or electric plucking
Kind.
Preferably, in step (2), the grain size of micron grade aluminum oxide is 0.2~10 μm；
The grain size of alumina in Nano level is 5~50nm.
Preferably, in step (2), the additive amount of silane coupling agent is micron grade aluminum oxide and alumina in Nano level total weight
0.5~2.5%.
Preferably, in step (2), vacuum drying technique is that vacuum degree is 0.05~0.35Mpa, drying temperature 40
~50 DEG C.
Preferably, in step (3), the spray parameters of the supersonic flame spraying are, using oxygen as combustion-supporting gas, hydrogen
Gas is as combustion gas, and nitrogen is as powder feeding gas；
The pressure of the oxygen is 18~20bar, and flow is 300~800slpm, and the pressure of hydrogen is 4~5bar, flow
For 40~60slpm, it is 1~3bar to assist the pressure of gases methane, and flow is 5~10slpm, and the pressure of nitrogen is 3~9bar,
Flow is 10~20slpm, and powder feed rate is 50~100g/min, and spray distance is 150~300mm.
Compared with prior art, the present invention has the following technical effects：
In the present invention, in the thermal spraying on surface micron grade aluminum oxide of slush pump pump shaft and the mangcorn of alumina in Nano level
Son, the method for the thermal spraying not only increase the compactness of pump shaft surface particle, also further optimize between particle, interface
Stress state, effectively raise the intensity and toughness of coating, it is ensured that the wearability of slush pump pump shaft in use
Can, extend its service life；
In the present invention, methane gas that the metal nickel powder that is blended with micron grade aluminum oxide and alumina in Nano level is burnt as thermal jet
The catalyst for cracking of body, in pump shaft Surface Creation carbon nanotube, which not only has higher intensity, can also be into one
Shield effectiveness of the raising of step to external pumped (conveying) medium, it is ensured that the sealing effect of pump shaft.
Specific implementation mode
In order to make the technical means, the creative features, the aims and the efficiencies achieved by the present invention be easy to understand, tie below
Specific embodiment is closed, the present invention is furture elucidated.
The present invention provides a kind of process of surface treatment of slush pump pump shaft, include the following steps：
(1) roughing in surface is carried out to pump shaft, is then immersed into rinse in the ethanol solution that mass fraction is 95%；
(2) it is 1 in mass ratio by micron grade aluminum oxide and alumina in Nano level：(3~5) it weighs and is put into high-speed mixer
3~5min of middle mixing, is subsequently added into the metal nickel powder of above-mentioned material total weight 0.1~0.5%, stirs evenly rear blanking to stirring
In bucket, silane coupling agent is added, after stirring evenly, places it in dry under vacuum condition；Then under the protection of inert gas
3~5h is heated at a temperature of 120~150 DEG C, then grinding obtains mixture of powders；
(3) using methane as auxiliary gas, mixture of powders in step (2) is sprayed by the way of supersonic flame spraying
It burns to the pump shaft surface in step (1), the slush pump pump shaft being surface-treated.
In the present invention, the purpose of pump shaft roughing in surface is to improve surface roughness, improves its knot with Thermal Spray Particles
Close area and joint efficiency.In step (1), the method for pump shaft roughing in surface is one in sandblasting, cutting thread, annular knurl or electric plucking
Kind.
In the present invention, the grain size of the micron grade aluminum oxide is 0.2~10 μm；The grain size of alumina in Nano level be 5~
50nm。
In the present invention, the effect of silane coupling agent is to be modified place to micron grade aluminum oxide and alumina in Nano level
Reason, the micron grade aluminum oxide through its modification and forms some covalent key between alumina in Nano level, to be conducive to thermal jet
The implementation of painting.The additive amount of the silane coupling agent can select in a wider scope, preferably, the silane is even
The additive amount for joining agent is the 0.5~2.5% of micron grade aluminum oxide and alumina in Nano level total weight.
The silane coupling agent is methyltrimethoxysilane, aminopropyl trimethoxysilane, g- aminopropyl triethyl groups
Silane, g- glycidyl ether oxygen propyl trimethoxy silicanes, one kind in γ-glycidyl ether oxygen propyl trimethoxy silicane or
A combination thereof.
In the present invention, vacuum drying technique is that vacuum degree is 0.05~0.35Mpa, and drying temperature is 40~50 DEG C.
In the present invention, the spray parameters of the supersonic flame spraying are that, using oxygen as combustion-supporting gas, hydrogen is as combustion
Gas, nitrogen is as powder feeding gas；
The pressure of the oxygen is 18~20bar, and flow is 300~800slpm, and the pressure of hydrogen is 4~5bar, flow
For 40~60slpm, it is 1~3bar to assist the pressure of gases methane, and flow is 5~10slpm, and the pressure of nitrogen is 3~9bar,
Flow is 10~20slpm, and powder feed rate is 50~100g/min, and spray distance is 150~300mm.
The advantages of providing the process of surface treatment of slush pump pump shaft to the present invention below by way of specific embodiment is done into one
The explanation of step.
Embodiment 1
A kind of process of surface treatment of slush pump pump shaft：
(1) blasting treatment is carried out to pump shaft, makes its roughing in surface, be then immersed into the ethyl alcohol that mass fraction is 95%
Rinse in solution；
(2) 200g microns of grade aluminum oxides are weighed and (are purchased from Anhui Ke Run nanosecond science and technology Co., Ltd KR-Al2O3- 3) and 800g
Alumina in Nano level (is purchased from Anhui Ke Run nanosecond science and technology Co., Ltd KR-Al2O3- 1) it, then puts it into high-speed mixer
4min is mixed, it (is that (grain size is LNC-I purchased from Changsha Li You metal materials Co., Ltd, the trade mark to be subsequently added into 3g metal nickel powders
0.4 μm)), it stirs evenly in rear blanking to agitator, 10g methyltrimethoxysilane is added, after stirring evenly, places it in
Dry under vacuum condition, the vacuum condition is that vacuum degree is 0.20Mpa, and drying temperature is 45 DEG C；Then in the protection of nitrogen
Under 4h is heated at a temperature of 130 DEG C, then grinding obtain mixture of powders；
(3) using methane as auxiliary gas, mixture of powders in step (2) is sprayed by the way of supersonic flame spraying
It burns to the pump shaft surface in step (1), the slush pump pump shaft being surface-treated.
The spray parameters of the supersonic flame spraying are that, using oxygen as combustion-supporting gas, hydrogen is made as combustion gas, nitrogen
For powder feeding gas；
The pressure of the oxygen is 19bar, flow 500slpm, and the pressure of hydrogen is 4bar, flow 50slpm, auxiliary
It is 2bar to help the pressure of gases methane, flow 8slpm, and the pressure of nitrogen is 6bar, flow 15slpm, and powder feed rate is
70g/min, spray distance 250mm.
Embodiment 2
A kind of process of surface treatment of slush pump pump shaft：
(1) blasting treatment is carried out to pump shaft, makes its roughing in surface, be then immersed into the ethyl alcohol that mass fraction is 95%
Rinse in solution；
(2) 200g microns of grade aluminum oxides are weighed and (are purchased from Anhui Ke Run nanosecond science and technology Co., Ltd KR-Al2O3- 3) and 600g
Alumina in Nano level (is purchased from Anhui Ke Run nanosecond science and technology Co., Ltd KR-Al2O3- 1) it, then puts it into high-speed mixer
3min is mixed, it (is that (grain size is LNC-I purchased from Changsha Li You metal materials Co., Ltd, the trade mark to be subsequently added into 4g metal nickel powders
0.4 μm)), it stirs evenly in rear blanking to agitator, 20g methyltrimethoxysilane is added, after stirring evenly, places it in
Dry under vacuum condition, the vacuum condition is that vacuum degree is 0.05Mpa, and drying temperature is 40 DEG C；Then in the protection of nitrogen
Under 5h is heated at a temperature of 120 DEG C, then grinding obtain mixture of powders；
(3) using methane as auxiliary gas, mixture of powders in step (2) is sprayed by the way of supersonic flame spraying
It burns to the pump shaft surface in step (1), the slush pump pump shaft being surface-treated.
The spray parameters of the supersonic flame spraying are that, using oxygen as combustion-supporting gas, hydrogen is made as combustion gas, nitrogen
For powder feeding gas；
The pressure of the oxygen is 18bar, flow 300slpm, and the pressure of hydrogen is 4bar, flow 40slpm, auxiliary
It is 1bar to help the pressure of gases methane, flow 5slpm, and the pressure of nitrogen is 3bar, flow 10slpm, and powder feed rate is
50g/min, spray distance 150mm.
Embodiment 3
A kind of process of surface treatment of slush pump pump shaft：
(1) blasting treatment is carried out to pump shaft, makes its roughing in surface, be then immersed into the ethyl alcohol that mass fraction is 95%
Rinse in solution；
(2) 200g microns of grade aluminum oxides are weighed and (are purchased from Anhui Ke Run nanosecond science and technology Co., Ltd KR-Al2O3- 3) and 1000g
Alumina in Nano level (is purchased from Anhui Ke Run nanosecond science and technology Co., Ltd KR-Al2O3- 1) it, then puts it into high-speed mixer
5min is mixed, it (is that (grain size is LNC-I purchased from Changsha Li You metal materials Co., Ltd, the trade mark to be subsequently added into 1.2g metal nickel powders
0.4 μm)), it stirs evenly in rear blanking to agitator, 24g methyltrimethoxysilane is added, after stirring evenly, places it in
Dry under vacuum condition, the vacuum condition is that vacuum degree is 0.35Mpa, and drying temperature is 50 DEG C；Then in the protection of nitrogen
Under 3h is heated at a temperature of 150 DEG C, then grinding obtain mixture of powders；
(3) using methane as auxiliary gas, mixture of powders in step (2) is sprayed by the way of supersonic flame spraying
It burns to the pump shaft surface in step (1), the slush pump pump shaft being surface-treated.
The spray parameters of the supersonic flame spraying are that, using oxygen as combustion-supporting gas, hydrogen is made as combustion gas, nitrogen
For powder feeding gas；
The pressure of the oxygen is 20bar, flow 800slpm, and the pressure of hydrogen is 5bar, flow 60slpm, auxiliary
It is 3bar to help the pressure of gases methane, flow 10slpm, and the pressure of nitrogen is 9bar, flow 20slpm, and powder feed rate is
100g/min, spray distance 300mm.
Comparative example 1
The process of surface treatment of slush pump pump shaft provided in this embodiment and the treatment process in embodiment 1 are essentially identical,
Unlike, in step (2), only with micron grade aluminum oxide, remaining is constant, the slush pump pump shaft after being surface-treated.
Specifically, a kind of process of surface treatment of slush pump pump shaft：
(1) blasting treatment is carried out to pump shaft, makes its roughing in surface, be then immersed into the ethyl alcohol that mass fraction is 95%
Rinse in solution；
(2) 1000g microns of grade aluminum oxides are weighed and (are purchased from Anhui Ke Run nanosecond science and technology Co., Ltd KR-Al2O3- 3), then
Put it into and mix 4min in high-speed mixer, be subsequently added into 3g metal nickel powders (purchased from Changsha Li You metal materials Co., Ltd,
The trade mark is LNC-I (grain size is 0.4 μm)), it stirs evenly in rear blanking to agitator, 10g methyltrimethoxysilane is added, stirs
After mixing uniformly, drying under vacuum condition is placed it in, the vacuum condition is that vacuum degree is 0.20Mpa, and drying temperature is 45 DEG C；
Then 4h is heated at a temperature of 130 DEG C under the protection of nitrogen, then grinding obtains mixture of powders；
(3) using methane as auxiliary gas, mixture of powders in step (2) is sprayed by the way of supersonic flame spraying
It burns to the pump shaft surface in step (1), the slush pump pump shaft being surface-treated.
The spray parameters of the supersonic flame spraying are that, using oxygen as combustion-supporting gas, hydrogen is made as combustion gas, nitrogen
For powder feeding gas；
The pressure of the oxygen is 19bar, flow 500slpm, and the pressure of hydrogen is 4bar, flow 50slpm, auxiliary
It is 2bar to help the pressure of gases methane, flow 8slpm, and the pressure of nitrogen is 6bar, flow 15slpm, and powder feed rate is
70g/min, spray distance 250mm.
Comparative example 2
The process of surface treatment of slush pump pump shaft provided in this embodiment and the treatment process in embodiment 1 are essentially identical,
Unlike, in step (2), only with alumina in Nano level, remaining is constant, the slush pump pump shaft after being surface-treated.
Specifically, a kind of process of surface treatment of slush pump pump shaft：
(1) blasting treatment is carried out to pump shaft, makes its roughing in surface, be then immersed into the ethyl alcohol that mass fraction is 95%
Rinse in solution；
(2) it weighs 1000g alumina in Nano level and (is purchased from Anhui Ke Run nanosecond science and technology Co., Ltd KR-Al2O3- 1), then
Put it into and mix 4min in high-speed mixer, be subsequently added into 3g metal nickel powders (purchased from Changsha Li You metal materials Co., Ltd,
The trade mark is LNC-I (grain size is 0.4 μm)), it stirs evenly in rear blanking to agitator, 10g methyltrimethoxysilane is added, stirs
After mixing uniformly, drying under vacuum condition is placed it in, the vacuum condition is that vacuum degree is 0.20Mpa, and drying temperature is 45 DEG C；
Then 4h is heated at a temperature of 130 DEG C under the protection of nitrogen, then grinding obtains mixture of powders；
(3) using methane as auxiliary gas, mixture of powders in step (2) is sprayed by the way of supersonic flame spraying
It burns to the pump shaft surface in step (1), the slush pump pump shaft being surface-treated.
The spray parameters of the supersonic flame spraying are that, using oxygen as combustion-supporting gas, hydrogen is made as combustion gas, nitrogen
For powder feeding gas；
The pressure of the oxygen is 19bar, flow 500slpm, and the pressure of hydrogen is 4bar, flow 50slpm, auxiliary
It is 2bar to help the pressure of gases methane, flow 8slpm, and the pressure of nitrogen is 6bar, flow 15slpm, and powder feed rate is
70g/min, spray distance 250mm.
Comparative example 3
The process of surface treatment of slush pump pump shaft provided in this embodiment and the treatment process in embodiment 1 are essentially identical,
Unlike, in step (2), nickel powder is not added, remaining treatment process is constant.
Performance test：
1, case hardness is tested
Using hardometer (Shanghai Ju Jing precision instruments Manufacturing Co., Ltd, image analysis microhardness testers HV-1000IS)
Surface treated slush pump pump shaft in above-described embodiment is tested, with the mud of the process of surface treatment processing without above-described embodiment
Stock pump pump shaft is aggregated into as blank group, and by test result in table 1.
2, wearability test
Abrasion test is carried out to surface treated slush pump pump shaft in above-described embodiment, using NANOVEA companies of the U.S.
The omnipotent friction wear testing machine of T50 types of production, experimental condition 1500rpm, load 20N, axial force 2N, after record wears 5h
Wear rate, and test result is aggregated into table 1.Table 1：
| Vickers hardness hv | Wear rate % | |
| Embodiment 1 | 964.8 | 5.12 |
| Embodiment 2 | 961.5 | 5.25 |
| Embodiment 3 | 958.7 | 5.26 |
| Comparative example 1 | 897.4 | 15.64 |
| Comparative example 2 | 934.8 | 13.58 |
| Comparative example 3 | 948.7 | 9.52 |
| Blank group (unprocessed) | 926.4 | 12.59 |
It can be seen that in comparative example 1 in conjunction with above-mentioned test data, although have passed through the heat spraying method of the similar present invention
In the pump shaft surface deposited particles layer of slush pump, but the grain size of particle is excessively single, and hardness performance is poor；In comparative example 2
Comparative example 1 is slightly better than using the compactness of nano level particle, accumulation, Vickers hardness is slightly higher；
By the way of the composite-grain diameter of the embodiment of the present invention 1,2,3, the hardness of the pump shaft of obtained slush pump is higher.
In terms of wear testing, the wear rate that comparative example 1,2 is shown is also higher than untreated pump shaft, this is because
The compactness of particle layer through thermal spraying is poor, is worn.And embodiment 1,2,3 provided by the invention show it is more excellent
Different wear-resisting property.
The presence for having lacked nickel powder in comparative example 3, during thermal spraying, the generation of carbon nanotube reduces, to
The intensity of whole particle layer is reduced, in addition, anti abrasive ability also reduces.
Under wear working condition, interparticle weak binding power results in the decline of the antiwear property of hot-spraying coating, this hair
The bright aluminium oxide particles using composite-grain diameter constitute hot-spraying coating, the oxygen of the composite-grain diameter with metal nickel powder therein is entrained in
Change the aluminium oxide particles that aluminum particulate is compared to single particle size, it is suppressed that the coating crack being susceptible under external carbuncle effect carries
High hot-spraying coating ensures that it with excellent abrasion resistance properties laterally and longitudinal proof stress effect.
The basic principles and main features and the features of the present invention of the present invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement is both fallen in the range of claimed invention.The scope of protection of present invention is by appended claims
And its equivalent thereof.
Claims (6)
1. a kind of process of surface treatment of slush pump pump shaft, it is characterised in that：Include the following steps：
(1) roughing in surface is carried out to pump shaft, is then immersed into rinse in the ethanol solution that mass fraction is 95%；
(2) it is 1 in mass ratio by micron grade aluminum oxide and alumina in Nano level：(3~5) it weighs and is put into high-speed mixer and mix
3~5min is closed, the metal nickel powder of above-mentioned material total weight 0.1~0.5% is subsequently added into, stirs evenly rear blanking to agitator
In, silane coupling agent is added, after stirring evenly, places it in dry under vacuum condition；Then under the protection of inert gas in
3~5h is heated at a temperature of 120~150 DEG C, then grinding obtains mixture of powders；
(3) using methane as auxiliary gas, by the way of supersonic flame spraying extremely by mixture of powders torch firing in step (2)
Pump shaft surface in step (1), the slush pump pump shaft being surface-treated.
2. the process of surface treatment of slush pump pump shaft according to claim 1, it is characterised in that：In step (1), pump shaft table
The method of face roughening is one kind in sandblasting, cutting thread, annular knurl or electric plucking.
3. the process of surface treatment of slush pump pump shaft according to claim 1, it is characterised in that：In step (2), micron order
The grain size of aluminium oxide is 0.2~10 μm；
The grain size of alumina in Nano level is 5~50nm.
4. the process of surface treatment of slush pump pump shaft according to claim 1, it is characterised in that：In step (2), silane is even
The additive amount for joining agent is the 0.5~2.5% of micron grade aluminum oxide and alumina in Nano level total weight.
5. the process of surface treatment of slush pump pump shaft according to claim 1, it is characterised in that：In step (2), vacuum is dry
Dry technique is that vacuum degree is 0.05~0.35Mpa, and drying temperature is 40~50 DEG C.
6. the process of surface treatment of slush pump pump shaft according to claim 1, it is characterised in that：It is described super in step (3)
The spray parameters of velocity of sound flame-spraying are that, using oxygen as combustion-supporting gas, hydrogen is as combustion gas, and nitrogen is as powder feeding gas；
The pressure of the oxygen is 18~20bar, and flow is 300~800slpm, and the pressure of hydrogen is 4~5bar, flow 40
~60slpm, it is 1~3bar to assist the pressure of gases methane, and flow is 5~10slpm, and the pressure of nitrogen is 3~9bar, flow
For 10~20slpm, powder feed rate is 50~100g/min, and spray distance is 150~300mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810468661.5A CN108642430A (en) | 2018-05-16 | 2018-05-16 | A kind of process of surface treatment of slush pump pump shaft |
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| CN201810468661.5A CN108642430A (en) | 2018-05-16 | 2018-05-16 | A kind of process of surface treatment of slush pump pump shaft |
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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