CN105817832B - Pressure vessel field repair is with remanufacturing technique - Google Patents
Pressure vessel field repair is with remanufacturing technique Download PDFInfo
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- CN105817832B CN105817832B CN201610206171.9A CN201610206171A CN105817832B CN 105817832 B CN105817832 B CN 105817832B CN 201610206171 A CN201610206171 A CN 201610206171A CN 105817832 B CN105817832 B CN 105817832B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P6/00—Restoring or reconditioning objects
- B23P6/04—Repairing fractures or cracked metal parts or products, e.g. castings
-
- 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
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/082—Coating starting from inorganic powder by application of heat or pressure and heat without intermediate formation of a liquid in the layer
- C23C24/085—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
- C23C24/087—Coating with metal alloys or metal elements only
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Abstract
The invention discloses pressure vessel field repair and technique is remanufactured, is comprised the following steps：Step 1, grinding process and cleaning treatment are carried out to container position to be repaired；Step 2, cold welding repairing is carried out to position to be repaired, wlding specification is 1.6~2.0mm of Φ, and electric current is 0~300A, and shield gas flow rate is 3 6L/min；Step 3, finishing is carried out to postwelding surface reinforcement and edge until nondestructive inspection detection surface is qualified；Step 4, face progress blasting treatment of repairing watch is treated, make its surface coarsening, one layer of enhancement layer is sprayed to vessel surface using supersonic spray coating technology, spray pressure is 1.5~3.5MPa, and vessel surface temperature is no more than 150 DEG C, and spray distance is 60~120mm.The present invention has the advantage that as follows：Mechanical damage, corrosion, wear defect to vessel surface etc. are repaired, and form enhancement layer of a layer thickness more than 0.1mm in vessel surface, protective container is being resisted the corrosion for disliking summary and abrasion environment, increased the service life for a long time.
Description
Technical field
The present invention relates to pressure vessel to repair field, and particularly a kind of pressure vessel field repair is with remanufacturing technique.
Background technology
Pressure vessel is widely used, and it is that the industries such as petro chemical industry, energy industry, scientific research and military project are indispensable
Visual plant.Pressure vessel is typically formed by cylinder, end socket, flange, potted component, perforate and adapter, bearing etc. six are most of
Vessel, apply mostly under high temperature, high pressure, the complicated severe rugged environment of high corrosion, often there is various weld defects, knot
Structure defect, fault in material, using caused crackle, corrosion, wear etc., along with material caused by long-term extended active duty damages
Wound, easily causes the forms such as brittle failure, fatigue, burn into erosion, stress corrosion, intercrystalline corrosion and corrosion fatigue, once thing occurs
Therefore extremely serious consequence can be brought.
Because Surface Pressure Vessel degree of impairment is complicated, and many pressure vessel scales are big, and volume is big, tonnage causes greatly
It is difficult to field repair is carried out, therefore single renovation technique is indeterminable, many pressure vessels need to use kinds of processes
Joint reparation can be only achieved working condition requirement.
The content of the invention
It is an object of the invention to solve at least the above and defect, and provide the advantages of at least will be described later.
A further object of the invention be cold welding is repaired, mechanical reconditioning, overall sandblasting, the process integration such as supersonic spray coating
Pressure vessel is repaired, not only vessel surface is repaired, also one layer of enhancement layer is formed in vessel surface, increases the service life.
It is a still further object of the present invention to provide a kind of supersonic spray coating technology, with a kind of two-way powder feeding supersonic cold gas spray
Powder and compressed air are formed gas-solid two-phase flow by device, hit matrix under complete solid-state after accelerated, larger modeling occurs
Property deformation and be deposited on matrix surface and form enhancement layer.
In order to realize according to object of the present invention and further advantage, there is provided pressure vessel field repair is with remanufacturing
Technique, comprise the following steps：
Step 1, grinding process and cleaning treatment are carried out to container position to be repaired；
Step 2, cold welding repairing is carried out to position to be repaired, wlding specification is 1.6~2.0mm of Φ, and electric current is 0~300A, is protected
Shield gas flow is 3-6L/min；
Step 3, finishing is carried out to postwelding surface reinforcement and edge until nondestructive inspection detection surface is qualified；
Step 4, face progress blasting treatment of repairing watch is treated, make its surface coarsening, using supersonic spray coating technology to container table
Face sprays one layer of enhancement layer, and spray pressure be 1.5~3.5MPa, and vessel surface temperature is no more than 150 DEG C, spray distance for 60~
120mm。
Preferably, position to be repaired carries out radius of curvature >=20mm after grinding process in the step 1.
Preferably, cold welding electric current is 160~300A in the step 2.
Preferably, cold welding amendment uses the instruments such as angle grinder or hand grinding tool in the step 3.
Preferably, blasting treatment is in the step 4：Sprayed using pressure type sand-blasting machine with 24 mesh white fused alumina sand
Sand.
Preferably, sprayed in the step 4 using supersonic spray coating device.
Preferably, the enhancement layer is sprayed by iron(-)base powder forms.
Preferably, in addition to the surface after spraying hole sealing agent is brushed, carries out sealing pores.
Preferably, enhancement layer is formed by a kind of spraying of two-way powder feeding supersonic cold-spraying apparatus in the step 4, is sprayed
Device includes：Air accumulator, the first powder feeder, the second powder feeder, air heater and spray gun, the air accumulator separate three air
Branch road is connected with the first powder feeder, the second powder feeder, air heater respectively, first powder feeder, the second powder feeder difference
The first powder and the second powder transfer to spray gun, compressed air are heated in the air heater under air effect,
Air after heating forms supersonic airstream in the spray gun, drives the first powder and the second powder to spray shape from the spray gun
Into enhancement layer, wherein, the first valve and the second valve are provided with the branch road where first powder feeder and the second powder feeder,
First valve and the second Valve controlling flow are so as to controlling the emitted dose of the first powder and the second powder.
Preferably, the thickness D of the enhancement layer is：
Wherein,For the enhancement layer standard thickness sprayed in the unit time；η is the flow effect factor, zero dimension；Q1For
The gas flow of one powder feeder, L/min；Q2For the gas flow of the second powder feeder, L/min；Q3For the gas stream of air heater
Amount, L/min；κ1What the powder quality and the first powder feeder that are conveyed for the first powder feeder in the unit time and the second powder feeder conveyed
The ratio of powder quality summation；κ2The powder quality conveyed for the second powder feeder in the unit time is sent with the first powder feeder and second
The ratio of the powder quality summation of powder device conveying.
The present invention comprises at least following beneficial effect：1st, by selecting rational technological parameter and material, to pressure vessel
Surface carries out cold-patch reparation and spraying coating process.Not only the mechanical damage of vessel surface, corrosion default, wear-out defect etc. are repaiied
Mend, also form antiseptic wearable coat of a layer thickness more than 0.1mm in vessel surface.Protective container is resisting what evil was omited for a long time
Corrosion and abrasion environment, make pressure vessel fundamentally be protected, extend the service life of pressure vessel.2nd, pressure is held
The field repair of device is with remanufacturing technique, including Surface Pressure Vessel pretreatment, shaping, cold welding repairing, mechanical reconditioning, lossless spy
The process procedures such as wound, overall sandblasting, supersonic spray coating, surface is carried out to pressure vessel by Solvent degreasing, derusting and located in advance
Reason, is repaired to the hole of Surface Pressure Vessel, cold welding repairing is made it easier to, using class laser high energy pulse precision cold repair weld pair
Defect carries out cold welding repairing, carries out mechanical reconditioning to postwelding surface, makes it concordant with inner surface of container, to carrying out table at cold repair weld
Face is detected a flaw, and ensures weld flawless defect etc., is carried out overall blasting treatment to the vessel surface after repair welding, is sprayed using supersonic speed
Painting sprays to the surface after sandblasting, forms one layer of antiseptic wearable coat.
Further advantage, target and the feature of the present invention embodies part by following explanation, and part will also be by this
The research and practice of invention and be understood by the person skilled in the art.
Brief description of the drawings
Fig. 1 is the two-way powder feeding supersonic cold-spraying apparatus structural representation of the present invention
Fig. 2 is the spray gun structure schematic diagram of the two-way powder feeding supersonic cold-spraying apparatus of the present invention.
Embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings, to make those skilled in the art with reference to specification text
Word can be implemented according to this.
It should be appreciated that such as " having ", "comprising" and " comprising " term used herein do not allot one or more
The presence or addition of individual other elements or its combination.
Embodiment 1
Chilling tower reparation
Brief introduction：Major function is rapidly to be cooled down the high-temperature tail gas of hydrogenating reduction, and in April, 2010 goes into operation, and equipment is high
About 28m, cylinder are rolled by composite plate and are welded, and both ends spherical shell cover is cold stamping shaped making.Parameter such as table 1：
The chilling tower material of table 1 and parameter
| Title | Material | Diameter | Thickness (mm) | Long/high (m) |
| Cylinder | 20R+304L | Φ3600±18 | 16±3 | 20.7 |
| End socket | 20R+304L | Φ3600±18 | 16±3 | 0.9 |
| Skirt | Q235-B | Φ3614 | 22 | 6 |
Find main corrosion feature within 2014：
(1) spot corrosion pit, penetration corrosion pit, diffusion corrosion pit, machinery scratch.
(2) corrosion：Spot corrosion and homogeneous corrosion, spot corrosion Producing reason, be because produced in container higher chlorine from
Son；Homogeneous corrosion Producing reason, it is due to have carbon dioxide and hydrogen sulfide gas in solution, makes solution slant acidity.
(3) corrosive medium：Chlorion and hydrogen ion
(4) damage location：Inner tank wall
(5) damage characteristic：There is a thicker yellowish-brown corrosion product on homogeneous corrosion, pitting corrosion, surface, spot corrosion pit, through corruption
Lose pit, diffusion corrosion pit and in flakes, machinery scratch etc..
Handled with field repair of the present invention with remanufacturing technique, step is as follows：
Step 1, cold welding pre-treatment
Using method (such as angle grinder, abrasive machine, gauze sander, small-sized polishing machine, fine oil stone, the smooth file of mechanical grinding
Knife or fine sandpaper) corrosion layer, fatigue layer and the oxide layer at position to be repaired are removed, until arriving fresh matrix material.To portion to be repaired
Position and edge are repaired, and position to be repaired is seamlessly transitted from deep to shallow, are ensured that radius of curvature cannot be less than 20mm.Then use
" high-effect detergent for removing grease dirt " thoroughly cleans surface to be repaired, wipes degreasing.Point corrosion pit is polished, detected, depth is less than
1.5mm uses grinding process, and depth uses cold welding method for repairing and mending more than 1.5mm.
Step 2, cold welding repairing
Cold welding repairing uses class laser high energy pulse precision cold repair weld equipment, using 1.6~2.0mm of Φ ER308L wldings
Soldering is carried out, operating voltage 30V, operating current is 160~200A, and argon flow amount 5L/min, the cold welding time is 0.07s
Repaired after step 3, cold welding
Postwelding surface reinforcement and edge are repaired with instruments such as angle grinder, hand grinding tools, by polishing, grinding or even throw
The methods of light processing soldering position, makes the surface curvature after soldering and surface smoothness are consistent with other positions.
Step 4, acceptance test
Ensure that soldering layer surface is smooth, layer even compact is simultaneously smooth with base material junction；Using lossless spy
Triage surveys surface and whether there is weld defect, to unqualified position, should implement repair welding, until reaching requirement.
Step 5, blasting treatment
Using pressure type sand-blasting machine, the surface entirety sandblasting after being repaired from granularity for the white fused alumina sand of 24 mesh to cold welding,
Surface coarsening processing is carried out, changes the roughness on surface, makes the mechanical performance on surface be improved, by increasing capacitance it is possible to increase surface and coating
Between adhesive force, extend the durability of enhancement layer.
Step 6, spraying enhancement layer, are remanufactured to the surface of repairing, protection repairing surface and enhancing repairing surface
Intensity.
Enhancement layer is formed by a kind of spraying of two-way powder feeding supersonic cold-spraying apparatus, as shown in figure 1, spray equipment includes：
Compressor 110, air accumulator 120, the first powder feeder 130, the second powder feeder 140, air heater 150, lance tube 160, spray gun
170 and seal bootr 180.Compressor 110 is connected with air accumulator 120, and air forms compressed air after the compression of compressor 110,
Store in air accumulator 120；The compressed air flowed out from air accumulator 120 is divided into three tunnels, is supplied to the first powder feeder all the way
130, the second powder feeder 140 is supplied to all the way, and another way is supplied to air heater 150.It is supplied to the He of the first powder feeder 130
The compressed air of second powder feeder 140 is as the driving gas for driving flow of powder in the first powder feeder 130 and the second powder feeder 140
Body, the second powder for making to be stored in the first powder and the second powder feeder 140 of the first powder feeder 130 are transported to lance tube
In 160.Wherein, there is provided the compressed air to air heater 150 is heated to form hot-air in air heater 150,
Hot-air is delivered in lance tube 160.Air after heating forms supersonic airstream in the spray gun 170, drives the first powder
End and the second powder spray from the spray gun 170, realize spraying.It is further that first powder feeder 130 and second is sent
The first valve and the second valve, first valve and the second Valve control gas stream are provided with branch road where powder device 140
Measure so as to control the emitted dose of the first powder and the second powder.It is further, as shown in Fig. 2 spray gun 170 includes convergence portion
171st, throat 172, diffusion part 173 and export department 174, the front end of spray gun 170 connect lance tube 160, the lance tube 160
The diameter parallel of axis and spray gun 170.The end of spray gun 170 connects conical seal bootr 180, and the seal bootr 180 is remote
One end of spray gun 170 is uncovered structure, and seal bootr 180 covers on sprayed surface and forms closed bin to ensure that supersonic airstream smoothly sprays
Apply.The powder of air driven first, the second powder after being heated flow through convergence portion 171, throat 172, diffusion part in spray gun 170
Supersonic airstream is formed after 173, outflow forms gas-solid two-phase flow from export department 174, hits base under complete solid-state after accelerated
Body, larger plastic deformation occurs and is deposited on the matrix surface through blasting treatment and forms enhancement layer.
Supersonic spray coating equipment choosing granularity is 15-40 μm of 316L powder of stainless steel, the composition of 316L powder of stainless steel
As shown in Table 1, wherein, the first powder is made up of carbon, chromium, nickel, molybdenum, silicon, manganese and sulphur, and the second powder is made up of iron powder.
The 316L powder of stainless steel composition tables of table one
| Composition | C | Cr | Ni | Mo | Si | Mn | S | Fe |
| Content (%) | 0.06 | 17~19 | 11~13 | 1.5~2.5 | ＜ 1.0 | ＜ 0.6 | ＜ 0.5 | Surplus |
Standard thicknessIt is defined as：Under conditions of reservoir outlet pressure is 2.9MPa, the gas of the first powder feeder is set
Body flow Q1For 10L/min, the gas flow Q of the second powder feeder2For 10L/min, the gas flow Q of air heater3For 10L/
The powder quality m of conveying in min, the minutes of the first powder feeder one1Conveyed for 19.5g, the minutes of the second powder feeder one
Powder quality m2Under conditions of 19.5g, two-way powder feeding supersonic cold-spraying apparatus is sprayed caused by 1 second on sprayed surface
Coating thickness.Through measuring standard thicknessFor 0.35mm.
Spraying parameter is in the present embodiment：The outlet pressure of air accumulator 120 is 2.9MPa, Q1=20L/min；Q2=
60L/min；Q3=50L/min；m1=39g, m2=117g, κ1=m1/(m1+m2)=0.25, κ2=m2/(m1+m2)=0.75；Through
The temperature of gas is 120 DEG C after air heater heating, spray distance 60mm.Calculated using formula (1) and (2) and strengthen thickness
Spend D:
Wherein,For the enhancement layer thickness sprayed in the unit time；η is the flow effect factor, zero dimension；Q1Sent for first
The gas flow of powder device, L/min；Q2For the gas flow of the second powder feeder, L/min；Q3For the gas flow of air heater,
L/min；κ1The powder quality and the first powder feeder that are conveyed for the first powder feeder in the unit time and the powder of the second powder feeder conveying
The ratio of last quality summation, κ1=m1/(m1+m2)；κ2The powder quality conveyed for the second powder feeder in the unit time is sent with first
The ratio of powder device and the powder quality summation of the second powder feeder conveying, κ2=m2/(m1+m2)。
η=3.5 calculated according to (2), are strengthened thickness degree D=1.22mm according to formula (1), and porosity is
2.79%.The influence of heat gas temperatures and spray distance is ignored in formula (1) and (2), main to consider flow and powder conveying capacity
Influence to coating layer thickness, during actual repair, when the powder proportions of spraying are fixed, i.e. the first powder and the second powder
Ratio kappa1κ2It is fixed, it is desirable to the gas flow Q of the first powder feeder1With the gas flow Q of the second powder feeder2Also fix, adjust
The gas flow Q of air heater3, the thickness that can obtain coating is calculated by formula, calculates the thickness of enhancement layer
It is less than 0.1% with the error actually sprayed.
Step 7, sealing pores
From more than 150 DEG C of heatproof, anti-H 2 S, chlorion and the multifunctional macromolecule of oxide etch base compound hole sealing material
Expect to carry out sealing pores to the surface after spraying.
Embodiment 2
Torch liquid separation tank major function is used to come out the drop separation discharged in gas, and in April, 2010 goes into operation, specification of equipment
For：1800 × 3600 × 14mm, gross weight are 5.2 tons, and cylinder material is SA516GR.70N, and working media is containing H2S acid
Property liquid.
Find that there is the different etch pit of depth, wherein hot spot for torch liquid separation pot bottom large area in maintenance in 2014
Most deep 6.0mm, the corrosion gross area is about 0.6m2。
Handled with field repair of the present invention with remanufacturing technique, step is as follows：
Step 1, cold welding pre-treatment
Using method (such as angle grinder, abrasive machine, gauze sander, small-sized polishing machine, fine oil stone, the smooth file of mechanical grinding
Knife or fine sandpaper) corrosion layer, fatigue layer and the oxide layer at position to be repaired are removed, until arriving fresh matrix material.To portion to be repaired
Position and edge are repaired, and position to be repaired is seamlessly transitted from deep to shallow, are ensured that radius of curvature cannot be less than 20mm.Then use
" high-effect detergent for removing grease dirt " thoroughly cleans surface to be repaired, wipes degreasing.Point corrosion pit is polished, detected, depth is less than
3mm, using built-up welding cold-patch restorative procedure, depth is more than 3mm, using the method for digging cold welding pattching.To cold welding rear region immediately
300 DEG C of dehydrogenations are carried out, after dehydrogenation, 100% Magnetic testing and 100% Liquid penetrant testing are carried out to soldering position, until
It is qualified.
Step 2, cold welding repairing
Cold welding repairing uses class laser high energy pulse precision cold repair weld equipment, using 1.6~2.0mm of Φ H08Mn (HIC)
Wlding carries out soldering, and operating voltage 30V, operating current is 160~200A, argon flow amount 5L/min, and the cold welding time is
0.07s
Repaired after step 3, cold welding
Postwelding surface reinforcement and edge are repaired with instruments such as angle grinder, hand grinding tools, by polishing, grinding or even throw
The methods of light processing soldering position, makes the surface curvature after soldering and surface smoothness are consistent with other positions.
Step 4, acceptance test
Ensure that soldering layer surface is smooth, layer even compact is simultaneously smooth with base material junction；Using lossless spy
Triage surveys surface and whether there is weld defect, to unqualified position, should implement repair welding, until reaching requirement.
Step 5, blasting treatment
Using pressure type sand-blasting machine, from the white fused alumina sand that granularity is 24 mesh to the inside and outside table of torch liquid separation tank after repairing
Face carries out Sa2.5 level blasting treatments.
Step 6, spray-on coating
Organic silicic acid yellow zinc chromate primer paint is done 2 times to torch liquid separation tank inner and outer surfaces, thickness of dry film is 75 μm；Organic silicic acid is heat-resisting
Finish paint 2 times, thickness of dry film are 25~40 μm.
As described above, the present invention has the advantages that：1st, by selecting rational technological parameter and material, to pressure
Vessel surface carries out cold-patch reparation and spraying coating process.Not only the mechanical damage of vessel surface, corrosion default, wear-out defect etc. are entered
Row repairing, also form enhancement layer of a layer thickness more than 0.1mm in vessel surface.Protective container dislikes the corruption of summary resisting for a long time
Erosion and abrasion environment, make pressure vessel fundamentally be protected, extend the service life of pressure vessel.2nd, pressure vessel
Field repair and remanufacture technique, including Surface Pressure Vessel pretreatment, shaping, cold welding repairing, mechanical reconditioning, lossless spy
The process procedures such as wound, overall sandblasting, supersonic cold gas spray, it is pre- that surface is carried out to pressure vessel by Solvent degreasing, derusting
Processing, is repaired to the hole of Surface Pressure Vessel, cold welding repairing is made it easier to, using class laser high energy pulse precision cold repair weld
Cold welding repairing is carried out to defect, mechanical reconditioning is carried out to postwelding surface, makes it concordant with inner surface of container, to being carried out at cold repair weld
Surface inspection, ensure weld flawless defect etc., overall blasting treatment is carried out to the vessel surface after repair welding, using supersonic speed
Cold spraying sprays to the surface after sandblasting, forms one layer of enhancement layer.
Although embodiment of the present invention is disclosed as above, it is not restricted in specification and embodiment listed
With.It can be applied to various suitable the field of the invention completely., can be easily for those skilled in the art
Realize other modification.Therefore it is of the invention and unlimited under the universal limited without departing substantially from claim and equivalency range
In specific details and shown here as the legend with description.
Claims (8)
1. pressure vessel field repair is with remanufacturing technique, it is characterised in that comprises the following steps：
Step 1, grinding process and cleaning treatment are carried out to container position to be repaired；
Step 2, cold welding repairing is carried out to position to be repaired, wlding specification is 1.6~2.0mm of Φ, and electric current is 0~300A, protects gas
Body flow is 3-6L/min；
Step 3, finishing is carried out to postwelding surface reinforcement and edge until nondestructive inspection detection surface is qualified；
Step 4, face progress blasting treatment of repairing watch is treated, make its surface coarsening, vessel surface is sprayed using supersonic spray coating technology
Apply one layer of enhancement layer, spray pressure be 1.5~3.5MPa, and vessel surface temperature is no more than 150 DEG C, spray distance for 60~
120mm；
Enhancement layer is formed by the spraying of two-way powder feeding supersonic cold-spraying apparatus in the step 4, and spray equipment includes：Air accumulator,
First powder feeder, the second powder feeder, air heater and spray gun, the air accumulator separate three air passages and sent respectively with first
Powder device, the second powder feeder, air heater connection, first powder feeder, the second powder feeder are respectively by the under air effect
One powder and the second powder transfer to spray gun, compressed air are heated in the air heater, and the air after heating is in institute
State and supersonic airstream is formed in spray gun, drive the first powder and the second powder to spray to form enhancement layer from the spray gun, wherein, institute
State and be provided with the first valve and the second valve, first valve and on the branch road where the first powder feeder and the second powder feeder
Two Valve controlling flows are so as to controlling the emitted dose of the first powder and the second powder；
The thickness D of the enhancement layer is：
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Wherein,For the enhancement layer standard thickness sprayed in the unit time；η is the flow effect factor, zero dimension；Q1Sent for first
The gas flow of powder device, L/min；Q2For the gas flow of the second powder feeder, L/min；Q3For the gas flow of air heater,
L/min；κ1The powder quality and the first powder feeder that are conveyed for the first powder feeder in the unit time and the powder of the second powder feeder conveying
The ratio of last quality summation；κ2The powder quality conveyed for the second powder feeder in the unit time and the first powder feeder and the second powder feeding
The ratio of the powder quality summation of device conveying.
2. pressure vessel field repair according to claim 1 is with remanufacturing technique, it is characterised in that in the step 1
Position to be repaired carries out radius of curvature >=20mm after grinding process.
3. pressure vessel field repair according to claim 2 is with remanufacturing technique, it is characterised in that in the step 2
Cold welding electric current is 160~300A.
4. pressure vessel field repair according to claim 3 is with remanufacturing technique, it is characterised in that in the step 3
Cold welding finishing uses angle grinder or hand grinding tool instrument.
5. pressure vessel field repair according to claim 4 is with remanufacturing technique, it is characterised in that in the step 4
Blasting treatment is：Sandblasting is carried out with 24 mesh white fused alumina sand using pressure type sand-blasting machine.
6. pressure vessel field repair according to claim 5 is with remanufacturing technique, it is characterised in that in the step 4
Sprayed using two-way powder feeding supersonic cold-spraying apparatus.
7. pressure vessel field repair according to claim 6 and remanufacture technique, it is characterised in that the enhancement layer by
Iron(-)base powder sprays to be formed.
8. pressure vessel field repair according to claim 7 is with remanufacturing technique, it is characterised in that also includes to spraying
Hole sealing agent is brushed on surface afterwards, carries out sealing pores.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610206171.9A CN105817832B (en) | 2016-04-05 | 2016-04-05 | Pressure vessel field repair is with remanufacturing technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610206171.9A CN105817832B (en) | 2016-04-05 | 2016-04-05 | Pressure vessel field repair is with remanufacturing technique |
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| CN106737212A (en) * | 2016-12-02 | 2017-05-31 | 江苏毅合捷汽车科技股份有限公司 | A kind of automobile turbocharger of high-efficiency environment friendly remanufactures blasting craft |
| CN108968637A (en) * | 2017-06-02 | 2018-12-11 | 九阳股份有限公司 | Cast the manufacturing method of cookware |
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| CN109352261B (en) * | 2018-11-14 | 2019-11-15 | 西安必盛激光科技有限公司 | A kind of cold-welding recovery method of cladding laser surfaces hydraulic vertical prop |
| CN109836027A (en) * | 2019-04-11 | 2019-06-04 | 苏州工业园区中法环境技术有限公司 | The restorative procedure of sludge drying device |
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| CN112893055A (en) * | 2021-02-08 | 2021-06-04 | 新疆八一钢铁股份有限公司 | COREX gas chamber bottom plate anticorrosion treatment method |
| CN113210844A (en) * | 2021-04-09 | 2021-08-06 | 浙江工业大学 | Process method for enhancing sealing performance of welded shell of lithium ion battery based on supersonic laser deposition technology |
| FR3125733A1 (en) * | 2021-07-30 | 2023-02-03 | L'Air Liquide Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude | Process for reinforcing and/or repairing mechanically welded equipment under pressure |
| CN114799722B (en) * | 2022-04-14 | 2023-07-21 | 江苏海川石化工程技术有限公司 | Quick repairing method for local stress corrosion defect of pressure vessel |
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