CN105817832B - Pressure vessel field repair is with remanufacturing technique - Google Patents
Pressure vessel field repair is with remanufacturing technique Download PDFInfo
- Publication number
- 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
- Authority
- CN
- China
- Prior art keywords
- powder
- msub
- mrow
- powder feeder
- repair
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
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 invention relates to the field of pressure vessel repair, in particular to a pressure vessel on-site repair and remanufacture process.
Background
The pressure container has wide application, and is an indispensable important device in industries such as petrochemical industry, energy industry, scientific research, military industry and the like. The pressure container generally comprises a container body consisting of six parts, namely a cylinder body, a seal head, a flange, a sealing element, an opening, a connecting pipe and a support, is mostly applied to a complex and harsh environment with high temperature, high pressure and high corrosion, and often has various welding defects, structural defects, material defects, cracks, corrosion, abrasion and the like generated in use, and material damage caused by long-term over-service easily causes brittle failure, fatigue, corrosion, erosion, stress corrosion, intergranular corrosion, corrosion fatigue and the like, and once an accident occurs, extremely serious consequences can be brought.
Because the surface damage condition of the pressure vessel is complex, and the large scale, large volume and large tonnage of many pressure vessels cause that the field repair is difficult, the single repair process cannot be solved, and many pressure vessels need to be repaired by adopting a plurality of processes in a combined way to meet the working condition requirement.
Disclosure of Invention
An object of the present invention is to solve at least the above problems and disadvantages and to provide at least the advantages described hereinafter.
The invention also aims to repair the pressure container by combining the processes of cold welding repair, mechanical polishing, integral sand blasting, supersonic spraying and the like, not only repairs the surface of the container, but also forms a reinforcing layer on the surface of the container, thereby prolonging the service life.
It is still another object of the present invention to provide a supersonic spray coating technique, wherein a dual-channel powder feeding supersonic cold spray device is used to form a gas-solid dual-phase flow of powder and compressed air, and the gas-solid dual-phase flow is accelerated to impact a substrate in a completely solid state, so that a large plastic deformation is generated and the powder is deposited on the surface of the substrate to form a reinforcement layer.
To achieve these objects and other advantages in accordance with the purpose of the invention, a pressure vessel field repair and remanufacturing process is provided, comprising the steps of:
step 1, polishing and cleaning a to-be-repaired part of a container;
step 2, performing cold welding repair on the part to be repaired, wherein the specification of a welding material is phi 1.6-2.0 mm, the current is 0-300A, and the flow of protective gas is 3-6L/min;
step 3, trimming the surface residual height and the edge after welding until the surface of the nondestructive inspection is qualified;
and 4, carrying out sand blasting treatment on the surface to be repaired to coarsen the surface, and spraying a layer of reinforcing layer on the surface of the container by adopting a supersonic spraying technology, wherein the spraying pressure is 1.5-3.5 MPa, the temperature of the surface of the container is not more than 150 ℃, and the spraying distance is 60-120 mm.
Preferably, the curvature radius of the part to be repaired in the step 1 is more than or equal to 20mm after the part to be repaired is polished.
Preferably, the cold welding current in the step 2 is 160-300A.
Preferably, the cold welding in step 3 is performed by using a tool such as an angle grinder or a hand grinding wheel.
Preferably, the sand blasting treatment in the step 4 is as follows: the sand blasting is carried out by adopting 24-mesh white corundum sand for a pressure type sand blasting machine.
Preferably, in the step 4, a supersonic spraying device is used for spraying.
Preferably, the reinforcing layer is formed by spraying iron-based alloy powder.
Preferably, the method further comprises the step of brushing a sealing agent on the sprayed surface to perform sealing treatment.
Preferably, the reinforcing layer in step 4 is formed by spraying a two-way powder feeding ultrasonic rapid cold spraying device, and the spraying device comprises: the air storage tank is divided into three air branches which are respectively connected with the first powder feeder, the second powder feeder and the air heater, the first powder feeder and the second powder feeder respectively transport the first powder and the second powder to the spray gun under the action of air, compressed air is heated by the air heater, supersonic airflow is formed in the spray gun after the heated air drives the first powder and the second powder to be sprayed out from the spray gun to form a reinforcing layer, a first valve and a second valve are arranged on a branch path where the first powder feeder and the second powder feeder are located, and the first valve and the second valve control the flow rate so as to control the spraying amount of the first powder and the second powder.
Preferably, the thickness D of the reinforcing layer is:
wherein,standard thickness of the enhancement layer sprayed in unit time, η flow influence factor, no dimension, Q1The gas flow of the first powder feeder is L/min; q2The gas flow of the second powder feeder is L/min; q3Is the gas flow of the air heater, L/min; kappa1The ratio of the mass of the powder conveyed by the first powder feeder to the total mass of the powder conveyed by the first powder feeder and the second powder feeder in unit time is shown; kappa2Is the ratio of the mass of the powder conveyed by the second powder feeder to the sum of the mass of the powder conveyed by the first powder feeder and the second powder feeder in unit time.
The invention at least comprises the following beneficial effects: 1. the cold repair and spraying process is carried out on the surface of the pressure container by selecting reasonable process parameters and materials. Not only repairs mechanical damage, corrosion defect, abrasion defect and the like on the surface of the container, but also forms a layer of anti-corrosion wear-resistant coating with the thickness of more than 0.1mm on the surface of the container. The protective container can resist severe corrosion and abrasion environment for a long time, so that the pressure container is fundamentally protected, and the service life of the pressure container is prolonged. 2. The on-site repair and remanufacture process of the pressure container comprises the process links of surface pretreatment, reshaping, cold welding repair, mechanical coping, nondestructive inspection, integral sand blasting, supersonic spraying and the like of the pressure container, wherein the surface pretreatment is carried out on the pressure container through oil removal and rust removal of an organic solvent, pits on the surface of the pressure container are repaired to facilitate cold welding repair, the cold welding repair is carried out on defects by adopting laser-like high-energy pulse precision cold repair welding, the mechanically coping is carried out on the surface after welding to enable the surface to be flush with the inner surface of the container, the surface inspection is carried out on the cold repair welding position to ensure that the welding position has no crack defects and the like, the integral sand blasting treatment is carried out on the surface of the pressure container after repair welding, and the surface after sand blasting is sprayed by adopting the supersonic spraying to form an anticorrosive wear.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a schematic structural view of a dual-way powder feeding ultrasonic rapid cold spraying device of the present invention.
FIG. 2 is a schematic structural diagram of a spray gun of the two-way powder feeding ultrasonic quick-cooling spraying device of the invention.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
Example 1
Quench tower repair
Brief introduction: the main function is to rapidly cool the high-temperature tail gas of hydrogenation reduction, the equipment is about 28m high in 4 months in 2010, the barrel is formed by rolling and welding composite plates, and the spherical end sockets at two ends are manufactured by cold stamping forming. The parameters are as in table 1:
TABLE 1 quench tower equipment materials and parameters
| Name (R) | Material of | Diameter of | Thickness (mm) | Long/high (m) |
| Barrel body | 20R+304L | Φ3600±18 | 16±3 | 20.7 |
| End socket | 20R+304L | Φ3600±18 | 16±3 | 0.9 |
| Skirt support | Q235-B | Φ3614 | 22 | 6 |
The main corrosion characteristics were found in 2014:
(1) pitting pits, through corrosion pits, diffusion corrosion pits, mechanical scratches.
(2) The corrosion reason is as follows: pitting and uniform corrosion, and the cause of the pitting is that higher chloride ions are generated in the container; the reason for the uniform corrosion is that the solution is acidic due to the presence of carbon dioxide and hydrogen sulfide gas in the solution.
(3) Corrosion medium: chloride ion and hydrogen ion
(4) And (3) damage parts: inner wall of tank
(5) Injury characteristics: uniform corrosion and pitting corrosion, thick tawny corrosion products on the surface, pit pitting corrosion, pit penetrating corrosion, pit diffusion corrosion, sheet connection, mechanical scratching and the like.
The field repairing and remanufacturing process of the invention is used for processing and comprises the following steps:
step 1, cold welding pretreatment
Removing the rust layer, the fatigue layer and the oxide layer of the part to be repaired by using a mechanical grinding method (such as an angle grinder, a gauze grinder, a mini-type polisher, a fine oilstone, a fine file or a fine sand paper) until the base material is fresh. And trimming the part to be trimmed and the edge to ensure that the part to be trimmed is smoothly transited from deep to shallow and the curvature radius is not less than 20 mm. Then the surface to be repaired is thoroughly cleaned by using a high-efficiency oil stain cleaning agent, and the surface to be repaired is wiped to remove oil stains. And (5) polishing and detecting the pitting, wherein polishing treatment is adopted when the depth is less than 1.5mm, and a cold welding repairing method is adopted when the depth is more than 1.5 mm.
Step 2, cold welding repair
The cold welding repair adopts laser-like high-energy pulse precise cold repair welding equipment, adopts ER308L welding material with phi of 1.6-2.0 mm to perform the weld repair, the working voltage is 30V, the working current is 160-200A, the argon flow is 5L/min, and the cold welding time is 0.07s
Step 3, cold welding and finishing
And (3) finishing the excess height and the edge of the surface after welding by using tools such as an angle grinder, a hand grinding wheel and the like, and processing the welded part by grinding, polishing and the like so as to ensure that the surface curvature and the surface smoothness after welding are consistent with those of other parts.
Step 4, qualification test
Ensuring that the surface of the welding repair layer is smooth and flat, and the welding layer is uniform and compact and the joint with the base material is smooth and flat; and (4) adopting nondestructive inspection to detect whether welding defects exist on the surface, and performing repair welding on unqualified parts until the requirements are met.
Step 5, sand blasting
The surface after cold welding repair is subjected to overall sand blasting by adopting a pressure type sand blasting machine and selecting white corundum sand with the granularity of 24 meshes, surface roughening treatment is carried out, the roughness of the surface is changed, the mechanical property of the surface is improved, the adhesive force between the surface and a coating can be increased, and the durability of the enhancement layer is prolonged.
And 6, spraying an enhancement layer, remanufacturing the repaired surface, protecting the repaired surface and enhancing the strength of the repaired surface.
The enhancement layer is formed by spraying a two-way powder feeding ultrasonic rapid cold spraying device, as shown in fig. 1, the spraying device comprises: a compressor 110, an air storage tank 120, a first powder feeder 130, a second powder feeder 140, an air heater 150, a lance tube 160, a lance 170, and a closure 180. The compressor 110 is connected with the air storage tank 120, and the air is compressed by the compressor 110 to form compressed air which is stored in the air storage tank 120; the compressed air flowing out of the air container 120 is divided into three paths, one of which is supplied to the first powder feeder 130, one of which is supplied to the second powder feeder 140, and the other of which is supplied to the air heater 150. The compressed air supplied to the first powder feeder 130 and the second powder feeder 140 serves as a driving gas for moving the powder in the first powder feeder 130 and the second powder feeder 140, so that the first powder stored in the first powder feeder 130 and the second powder stored in the second powder feeder 140 are transferred to the barrel 160. Wherein the compressed air supplied to the air heater 150 is heated at the air heater 150 to form hot air, which is delivered into the lance tube 160. The heated air forms supersonic airflow in the spray gun 170, and drives the first powder and the second powder to be sprayed out of the spray gun 170, so that spraying is realized. Further, a first valve and a second valve are provided in a branch where the first powder feeder 130 and the second powder feeder 140 are located, and the first valve and the second valve control the flow rate of the gas to control the injection amount of the first powder and the second powder. Further, as shown in fig. 2, the lance 170 includes a converging portion 171, a throat portion 172, a diverging portion 173, and an outlet portion 174, the front end of the lance 170 is connected to the lance tube 160, and the axis of the lance tube 160 is parallel to the axis of the lance 170. The tail end of the spray gun 170 is connected with a conical closed cover 180, one end of the closed cover 180, which is far away from the spray gun 170, is of an open structure, and the closed cover 180 covers the spraying surface to form a closed cabin so as to ensure smooth spraying of supersonic airflow. The heated air drives the first powder and the second powder to flow through the converging part 171, the throat part 172 and the diffusing part 173 in the spray gun 170 to form supersonic airflow, the supersonic airflow flows out from the outlet part 174 to form gas-solid dual-phase flow, and the supersonic airflow is accelerated to impact the substrate in a complete solid state to generate large plastic deformation and deposit on the surface of the substrate subjected to sand blasting to form the reinforcing layer.
The supersonic spraying equipment selects 316L stainless steel powder with the granularity of 15-40 mu m, and the composition of the 316L stainless steel powder is shown in the table I, wherein the first powder consists of carbon, chromium, nickel, molybdenum, silicon, manganese and sulfur, and the second powder consists of iron powder.
TABLE 316L stainless steel powder ingredient table
| Composition (I) | 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 | Balance of |
Standard thicknessIs defined as: setting the gas flow Q of the first powder feeder under the condition that the outlet pressure of the gas storage tank is 2.9MPa1Is 10L/min, and the gas flow Q of the second powder feeder2Is 10L/min, and the gas flow Q of the air heater3Is 10L/min, the mass m of the powder conveyed by the first powder feeder in one minute119.5g, mass m of powder delivered by the second powder feeder for one minute2The spraying thickness produced by spraying 1 second on the spraying surface by a double-way powder feeding ultrasonic rapid cold spraying device under the condition of 19.5 g. The standard thickness is determined by experimentsIs 0.35 mm.
The parameters of the spraying process in the embodiment are as follows: the outlet pressure of the gas storage tank 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; the temperature of the gas heated by the air heater was 120 ℃ and the spraying distance was 60 mm. The reinforcement layer thickness D is calculated using equations (1) and (2):
wherein,the thickness of the sprayed reinforcing layer in unit time, η as flow influence factor, Q1The gas flow of the first powder feeder is L/min; q2The gas flow of the second powder feeder is L/min; q3Is the gas flow of the air heater, L/min; kappa1Is the ratio of the mass of powder delivered by the first powder feeder to the sum of the mass of powder delivered by the first powder feeder and the second powder feeder, kappa1＝m1/(m1+m2)；κ2Is the ratio of the mass of the powder delivered by the second powder feeder to the sum of the mass of the powder delivered by the first powder feeder and the second powder feeder, kappa2＝m2/(m1+m2)。
η is 3.5 calculated according to (2), the thickness D of the reinforcing layer is 1.22mm obtained according to the formula (1), the porosity is 2.79%, the effects of the temperature of the heating gas and the spraying distance are ignored in the formulas (1) and (2), the effects of the flow rate and the powder conveying amount on the thickness of the coating layer are mainly considered, and in the actual repairing process, when the ratio of the sprayed powder is fixed, namely the ratio kappa of the first powder to the second powder1κ2Fixed, gas flow Q of the first powder feeder is required1And gas flow Q of the second powder feeder2Is also fixed, regulates the air flow Q of the air heater3The thickness of the coating can be obtained through formula calculation, and the error between the thickness of the reinforcing layer obtained through calculation and actual spraying is less than 0.1%.
Step 7, sealing treatment
And (3) selecting a multifunctional polymer-based composite hole sealing material which can resist the temperature of more than 150 ℃ and resist hydrogen sulfide, chloride ions and oxidation corrosion to carry out hole sealing treatment on the sprayed surface.
Example 2
The torch liquid separating tank is mainly used for separating liquid drops in the discharged gas, and is put into production in 4 months in 2010, and the equipment specification is as follows:1800 × 3600 × 14mm, total weight of 5.2 tons, material of the cylinder body is SA516GR.70N, and the working medium contains H2An acidic liquid of S.
Torch liquid separation tank bottom found in 2014 overhaulingThe partial area has etch pits with different depths, wherein the etch pits are 6.0mm deep at most, and the total etch area is about 0.6m2。
The field repairing and remanufacturing process of the invention is used for processing and comprises the following steps:
step 1, cold welding pretreatment
Removing the rust layer, the fatigue layer and the oxide layer of the part to be repaired by using a mechanical grinding method (such as an angle grinder, a gauze grinder, a mini-type polisher, a fine oilstone, a fine file or a fine sand paper) until the base material is fresh. And trimming the part to be trimmed and the edge to ensure that the part to be trimmed is smoothly transited from deep to shallow and the curvature radius is not less than 20 mm. Then the surface to be repaired is thoroughly cleaned by using a high-efficiency oil stain cleaning agent, and the surface to be repaired is wiped to remove oil stains. And (3) polishing and detecting the point corrosion pit, wherein the depth is less than 3mm, a surfacing cold repair repairing method is adopted, and the depth is more than 3mm, and a patching cold welding repairing method is adopted. And (3) immediately carrying out 300 ℃ dehydrogenation treatment on the area after cold welding, and carrying out 100% magnetic powder detection and 100% penetration detection on the welded part after dehydrogenation treatment until the welded part is qualified.
Step 2, cold welding repair
The cold welding repair adopts similar laser high-energy pulse precise cold repair welding equipment, adopts H08Mn (HIC) welding material with phi of 1.6-2.0 mm to perform weld repair, the working voltage is 30V, the working current is 160-200A, the argon flow is 5L/min, and the cold welding time is 0.07s
Step 3, cold welding and finishing
And (3) finishing the excess height and the edge of the surface after welding by using tools such as an angle grinder, a hand grinding wheel and the like, and processing the welded part by grinding, polishing and the like so as to ensure that the surface curvature and the surface smoothness after welding are consistent with those of other parts.
Step 4, qualification test
Ensuring that the surface of the welding repair layer is smooth and flat, and the welding layer is uniform and compact and the joint with the base material is smooth and flat; and (4) adopting nondestructive inspection to detect whether welding defects exist on the surface, and performing repair welding on unqualified parts until the requirements are met.
Step 5, sand blasting
And (3) adopting a pressure type sand blasting machine, and selecting white corundum sand with the granularity of 24 meshes to perform Sa2.5-grade sand blasting treatment on the inner surface and the outer surface of the repaired torch liquid separating tank.
Step 6, spraying the coating
2 times of organic zinc silicate primer is applied to the inner surface and the outer surface of the torch liquid separating tank, and the thickness of a dry film is 75 micrometers; the heat-resistant organic silicic acid finish paint is used for 2 times, and the thickness of a dry film is 25-40 mu m.
As described above, the present invention has the following advantageous effects: 1. the cold repair and spraying process is carried out on the surface of the pressure container by selecting reasonable process parameters and materials. Not only repairs mechanical damage, corrosion defect, abrasion defect and the like on the surface of the container, but also forms a reinforcing layer with the thickness of more than 0.1mm on the surface of the container. The protective container can resist severe corrosion and abrasion environment for a long time, so that the pressure container is fundamentally protected, and the service life of the pressure container is prolonged. 2. The on-site repair and remanufacture process of the pressure vessel comprises the process links of pressure vessel surface pretreatment, reshaping, cold welding repair, mechanical coping, nondestructive inspection, integral sand blasting, supersonic speed cold spraying and the like, wherein the surface pretreatment is carried out on the pressure vessel through oil removal and rust removal of an organic solvent, pits on the surface of the pressure vessel are repaired to facilitate cold welding repair, defects are repaired by cold welding through similar laser high-energy pulse precision cold repair welding, the mechanically coping is carried out on the surface after welding to enable the surface to be flush with the inner surface of the vessel, surface inspection is carried out on the cold repair welding position to ensure that the welding position has no crack defects and the like, the integral sand blasting treatment is carried out on the surface of the pressure vessel after repair welding, and the surface after sand blasting is sprayed by supersonic speed cold spraying to form a reinforcing layer.
While embodiments of the invention have been disclosed above, it is not intended to be limited to the uses set forth in the specification and examples. It can be applied to all kinds of fields suitable for the present invention. Additional modifications will readily occur to those skilled in the art. It is therefore intended that the invention not be limited to the exact details and illustrations described and illustrated herein, but fall within the scope of the appended claims and equivalents thereof.
Claims (8)
1. The field repair and remanufacture process of the pressure vessel is characterized by comprising the following steps of:
step 1, polishing and cleaning a to-be-repaired part of a container;
step 2, performing cold welding repair on the part to be repaired, wherein the specification of a welding material is phi 1.6-2.0 mm, the current is 0-300A, and the flow of protective gas is 3-6L/min;
step 3, trimming the surface residual height and the edge after welding until the surface of the nondestructive inspection is qualified;
step 4, carrying out sand blasting treatment on the surface to be repaired to coarsen the surface, and spraying a layer of reinforcing layer on the surface of the container by adopting a supersonic spraying technology, wherein the spraying pressure is 1.5-3.5 MPa, the temperature of the surface of the container is not more than 150 ℃, and the spraying distance is 60-120 mm;
step 4 the reinforcing layer is formed by the spraying of double-circuit powder feeding ultrasonic rapid cold spraying device, and the spraying device includes: the air storage tank is divided into three air branches which are respectively connected with the first powder feeder, the second powder feeder and the air heater, the first powder feeder and the second powder feeder respectively transport first powder and second powder to the spray gun under the action of air, compressed air is heated by the air heater, and the heated air forms supersonic airflow in the spray gun to drive the first powder and the second powder to be sprayed out of the spray gun to form a reinforcing layer, wherein a first valve and a second valve are arranged on a branch path where the first powder feeder and the second powder feeder are located, and the first valve and the second valve control the flow rate so as to control the spraying amount of the first powder and the second powder;
the thickness D of the reinforcing layer is as follows:
<mrow> <mi>D</mi> <mo>=</mo> <mover> <mi>D</mi> <mo>&OverBar;</mo> </mover> <mo>&times;</mo> <mi>&eta;</mi> </mrow>
<mrow> <mi>&eta;</mi> <mo>=</mo> <msup> <mrow> <mo>&lsqb;</mo> <msup> <mrow> <mo>(</mo> <mfrac> <msub> <mi>Q</mi> <mn>1</mn> </msub> <msub> <mi>Q</mi> <mn>3</mn> </msub> </mfrac> <mo>)</mo> </mrow> <msub> <mi>&kappa;</mi> <mn>1</mn> </msub> </msup> <mo>+</mo> <msup> <mrow> <mo>(</mo> <mfrac> <msub> <mi>Q</mi> <mn>2</mn> </msub> <msub> <mi>Q</mi> <mn>3</mn> </msub> </mfrac> <mo>)</mo> </mrow> <msub> <mi>&kappa;</mi> <mn>2</mn> </msub> </msup> <mo>&rsqb;</mo> </mrow> <mrow> <mn>3.0179</mn> <mo>&times;</mo> <mfrac> <msub> <mi>Q</mi> <mn>3</mn> </msub> <mrow> <msub> <mi>Q</mi> <mn>1</mn> </msub> <mo>+</mo> <msub> <mi>Q</mi> <mn>2</mn> </msub> </mrow> </mfrac> </mrow> </msup> </mrow>
wherein,standard thickness of the enhancement layer sprayed in unit time, η flow influence factor, no dimension, Q1The gas flow of the first powder feeder is L/min; q2The gas flow of the second powder feeder is L/min; q3Is the gas flow of the air heater, L/min; kappa1The ratio of the mass of the powder conveyed by the first powder feeder to the total mass of the powder conveyed by the first powder feeder and the second powder feeder in unit time is shown; kappa2Is the ratio of the mass of the powder conveyed by the second powder feeder to the sum of the mass of the powder conveyed by the first powder feeder and the second powder feeder in unit time.
2. The pressure vessel on-site repair and remanufacture process as claimed in claim 1, wherein the curvature radius of the portion to be repaired in step 1 is not less than 20mm after being polished.
3. The pressure vessel field repair and remanufacturing process according to claim 2, wherein the cold welding current in step 2 is 160-300A.
4. The process for field repair and remanufacture of a pressure vessel according to claim 3, wherein the cold weld repair in step 3 is performed using an angle grinder or a hand grinding wheel tool.
5. The pressure vessel field repair and remanufacturing process of claim 4, wherein the sand blasting in step 4 is: the sand blasting is carried out by adopting 24-mesh white corundum sand for a pressure type sand blasting machine.
6. The process for the on-site repair and remanufacture of a pressure vessel as claimed in claim 5, wherein a two-way powder feeding ultrasonic rapid cold spraying device is adopted for spraying in the step 4.
7. The process of on-site repair and remanufacture of a pressure vessel of claim 6, wherein the reinforcement layer is spray coated with an iron-based alloy powder.
8. The pressure vessel field repair and remanufacturing process as claimed in claim 7, further comprising coating a sealant on the sprayed surface to perform a sealing treatment.
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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105817832A CN105817832A (en) | 2016-08-03 |
| CN105817832B true CN105817832B (en) | 2018-02-09 |
Family
ID=56525734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610206171.9A Expired - Fee Related CN105817832B (en) | 2016-04-05 | 2016-04-05 | Pressure vessel field repair is with remanufacturing technique |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105817832B (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN108890214A (en) | 2018-07-03 | 2018-11-27 | 中信戴卡股份有限公司 | A kind of die surface renovation technique |
| 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 |
| CN111872629B (en) * | 2020-06-11 | 2022-04-08 | 南通鑫拓封头制造有限公司 | End socket preparation process for nondifferential repair of micro gap |
| CN112247339B (en) * | 2020-10-12 | 2022-05-13 | 菲斯达精密工业部件（苏州）有限公司 | Welding process of 5G large-scale die casting |
| CN112643033A (en) * | 2020-11-23 | 2021-04-13 | 合肥通用机械研究院有限公司 | Additive manufacturing and repairing method for build-up welding cracks of hydrogenation reactor |
| 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 |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5071054A (en) * | 1990-12-18 | 1991-12-10 | General Electric Company | Fabrication of cast articles from high melting temperature superalloy compositions |
| CN102061436A (en) * | 2010-12-22 | 2011-05-18 | 天津大学 | Re-manufacturing method of engineering machinery axle and coating of engineering machinery axle |
| CN102889195A (en) * | 2012-07-24 | 2013-01-23 | 虞岩贵 | Technology for remanufacturing compressor |
| CN103710660A (en) * | 2013-12-24 | 2014-04-09 | 中国人民解放军装甲兵工程学院 | Method for size restoring and reinforcing of outer wall and inner wall of water-cooling cylinder sleeve of engine |
| CN104043941A (en) * | 2014-06-23 | 2014-09-17 | 河南伟彤科技股份有限公司 | Re-manufacturing machining process of surface of inner hole of hydraulic cylinder scrap guide sleeve |
| CN204817040U (en) * | 2015-07-31 | 2015-12-02 | 北京天诚宇新材料技术有限公司 | Double - circuit send whitewashed supersonic speed cold spraying device |
-
2016
- 2016-04-05 CN CN201610206171.9A patent/CN105817832B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5071054A (en) * | 1990-12-18 | 1991-12-10 | General Electric Company | Fabrication of cast articles from high melting temperature superalloy compositions |
| CN102061436A (en) * | 2010-12-22 | 2011-05-18 | 天津大学 | Re-manufacturing method of engineering machinery axle and coating of engineering machinery axle |
| CN102889195A (en) * | 2012-07-24 | 2013-01-23 | 虞岩贵 | Technology for remanufacturing compressor |
| CN103710660A (en) * | 2013-12-24 | 2014-04-09 | 中国人民解放军装甲兵工程学院 | Method for size restoring and reinforcing of outer wall and inner wall of water-cooling cylinder sleeve of engine |
| CN104043941A (en) * | 2014-06-23 | 2014-09-17 | 河南伟彤科技股份有限公司 | Re-manufacturing machining process of surface of inner hole of hydraulic cylinder scrap guide sleeve |
| CN204817040U (en) * | 2015-07-31 | 2015-12-02 | 北京天诚宇新材料技术有限公司 | Double - circuit send whitewashed supersonic speed cold spraying device |
Non-Patent Citations (1)
| Title |
|---|
| 冷喷涂锌镍合金工艺及性能研究;吕保民;《中国优秀硕士学位论文全文数据库》;20130115(第01期);绪论第14,16-17页，正文第51-56页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105817832A (en) | 2016-08-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105817832B (en) | Pressure vessel field repair is with remanufacturing technique | |
| CN108559996B (en) | A kind of hydraulic support movable post outer surface laser melting coating restorative procedure | |
| CN101767261B (en) | Restoration and Protection Technology of Water Erosion Damage of Flow-through Parts of Steam Turbine | |
| CN101797676B (en) | Repair and surface protection process of desulfuration recycle pump | |
| JP6046954B2 (en) | Solid phase system and method for repairing forged parts | |
| CN101113508A (en) | Method for metal parts surface defects restoring and antiseptic treatment | |
| CN103623987A (en) | Coating technology of ship | |
| CN104056763A (en) | Ship coating process | |
| CN108342737A (en) | Pipe fitting processing technology | |
| WO2021073628A1 (en) | Cladding welding method applied to hydraulic support column | |
| CN106078525A (en) | Large-scale galvanizing surface of the work Pretreatment Technology Before Finishing | |
| CN108342727A (en) | A kind of laser strengthening method of straightening roll | |
| JP2013226585A (en) | Method of manufacturing welded structure | |
| JP2024038318A (en) | Preventive maintenance method of steel bridge and circulating blasting machine used for the same | |
| CN101070751A (en) | Technology for preparing anti-corrosion super-high-strength pumping-oil polish rod | |
| CN104789962A (en) | A scraper remanufacturing method | |
| JP7359411B2 (en) | Preventive maintenance method for steel bridges | |
| CN105112622B (en) | A kind of method and apparatus that can significantly improve stainless steel material hydrogen embrittlement energy | |
| CN106835119A (en) | Method for repairing plunger of reciprocating plunger pump for oilfield flooding | |
| CN101554679A (en) | Explosive welding method for 2205 double-phase steel composite steel plate for large-scale hydraulic engineering | |
| CN113696103B (en) | Long-service-life steel rail treatment method | |
| CN100542751C (en) | Glass shot peening process to improve stress corrosion resistance of stainless steel welded joints | |
| Tuthill | Stainless steel: surface cleanliness | |
| CN103433814B (en) | A surface grinding and finishing method for nuclear power pump valves | |
| CN104554619B (en) | Technique for processing ballast tank duplex stainless steel surface of stainless steel category II chemical tanker |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180209 Termination date: 20210405 |