CN110977324B - Method for repairing pump impeller cover plate by hole digging and laser additive - Google Patents
Method for repairing pump impeller cover plate by hole digging and laser additive Download PDFInfo
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- CN110977324B CN110977324B CN202010000616.4A CN202010000616A CN110977324B CN 110977324 B CN110977324 B CN 110977324B CN 202010000616 A CN202010000616 A CN 202010000616A CN 110977324 B CN110977324 B CN 110977324B
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000000654 additive Substances 0.000 title claims abstract description 20
- 230000000996 additive effect Effects 0.000 title claims abstract description 20
- 230000008439 repair process Effects 0.000 claims abstract description 77
- 239000000463 material Substances 0.000 claims abstract description 37
- 238000004372 laser cladding Methods 0.000 claims abstract description 35
- 238000005253 cladding Methods 0.000 claims abstract description 18
- 238000003754 machining Methods 0.000 claims abstract description 14
- 238000004519 manufacturing process Methods 0.000 claims abstract description 13
- 238000001514 detection method Methods 0.000 claims abstract description 10
- 238000005553 drilling Methods 0.000 claims abstract description 8
- 239000000843 powder Substances 0.000 claims description 29
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical group [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 22
- 239000000956 alloy Substances 0.000 claims description 13
- 229910045601 alloy Inorganic materials 0.000 claims description 13
- 229910052759 nickel Inorganic materials 0.000 claims description 11
- 239000002356 single layer Substances 0.000 claims description 7
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 6
- 239000010410 layer Substances 0.000 claims description 6
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 3
- 230000003647 oxidation Effects 0.000 claims description 3
- 238000007254 oxidation reaction Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000001291 vacuum drying Methods 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 2
- 230000003014 reinforcing effect Effects 0.000 abstract description 6
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- 238000005516 engineering process Methods 0.000 description 4
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- 238000005260 corrosion Methods 0.000 description 1
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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
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
- C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
- B22F7/062—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools involving the connection or repairing of preformed parts
-
- 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
- B23P6/045—Repairing fractures or cracked metal parts or products, e.g. castings of turbine components, e.g. moving or stationary blades, rotors, etc.
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
- B22F7/062—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools involving the connection or repairing of preformed parts
- B22F2007/068—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools involving the connection or repairing of preformed parts repairing articles
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Composite Materials (AREA)
- Manufacturing & Machinery (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides a method for repairing a pump impeller cover plate by hole digging and laser additive: drilling repair holes in positions, corresponding to failure regions, on the cover plate, wherein the size of each repair hole is larger than the width of the crack or covers the chipping region, and when a plurality of repair holes are formed, the repair holes are distributed at intervals in the circumferential direction of the cover plate; performing laser cladding material increase on the repair hole, wherein the thickness of the laser cladding material increase is higher than that of the cover plate surface, and a machining allowance is reserved; processing the position after cladding to meet the size requirement; and (4) performing dye check detection, detecting whether cracks exist in the repaired area, and delivering for use after the repaired area is qualified. According to the method, materials in a failure area are removed, and then the failure area is repaired in a laser cladding material increasing mode, namely a reinforcing structure is formed at a crack or chipping position, so that the strength reduction caused by the crack or chipping is compensated; the repaired cover plate and the repaired impeller can meet the use requirements, the repair quality is improved, and the production cost of an enterprise is reduced.
Description
Technical Field
The invention belongs to the technical field of remanufacturing and repairing of metal parts and relates to a method for repairing a pump impeller cover plate by hole digging and laser additive.
Background
The pump equipment is widely applied to the fields of petroleum, chemical industry and the like, the pump impeller of the pump equipment is an important component of the pump equipment, and a cover plate of the pump impeller is often cracked or broken or fails under severe working conditions. Because the value of a single pump device is large, if an enterprise adopts an impeller replacement mode, the enterprise cost is greatly increased, and because spare parts need to be reorganized for production or purchase, the production of the enterprise is seriously delayed, the residual value of the pump impeller cannot be fully utilized, and the environment is polluted. Therefore, the damaged pump impeller is remanufactured and repaired, and the application prospect is wide.
The laser cladding material increase remanufacturing technology is a surface modification and repair technology, and can recover functions of damaged/waste parts which lose values and continue to be safely used. The technology utilizes a laser emitter to emit high-energy beams, uses metal powder in a matching way, and obtains a cladding layer which is metallurgically fused with a damaged/waste part substrate through rapid solidification, so that the performances of high temperature resistance, corrosion resistance, wear resistance and the like of the original part are improved, and the geometrical size and performance recovery of the part are realized.
The problems that the control of laser additive process parameters is difficult, the repair quality is difficult to ensure and the like are caused by the characteristics of high rated rotating speed of a pump impeller, special damage area of an impeller cover plate, thin wall and the like, and the defects that cracks and the like easily occur in the repair area.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide a method for repairing a pump impeller cover plate by hole digging and laser additive manufacturing, which makes full use of a laser additive manufacturing and remanufacturing composite process technology to realize the function recovery of an impeller pump, improves the repair quality and reduces the production cost of enterprises.
In order to achieve the above objects and other related objects, the technical solution of the present invention is as follows:
a method for repairing a pump impeller cover plate by hole digging and laser additive comprises the following steps,
a. derusting and cleaning a pump impeller cover plate to be treated;
b. measuring the size of a failure area on the cover plate, wherein the failure area comprises a crack and/or chipping area;
c. drilling repair holes in positions, corresponding to failure regions, on the cover plate, wherein the size of each repair hole is larger than the width of the crack or covers the chipping region, and when a plurality of repair holes are formed, the repair holes are distributed at intervals in the circumferential direction of the cover plate;
d. performing laser cladding material increase on the repair hole, wherein the thickness of the laser cladding material increase is higher than that of the cover plate surface, and a machining allowance is reserved;
e. processing the position after cladding to meet the size requirement;
f. and (4) performing dye check detection, detecting whether cracks exist in the repaired area, and delivering for use after the repaired area is qualified.
According to the method, materials in a failure area are removed, and then the failure area is repaired in a laser cladding material increasing mode, namely a reinforcing structure is formed at a crack or chipping position, so that the strength reduction caused by the crack or chipping is compensated; the repaired cover plate and the repaired impeller can meet the use requirements, the repair quality is improved, and the production cost of an enterprise is reduced.
Optionally, the repair holes should be symmetrically formed with respect to the center of the cover plate, and the two symmetric repair holes have the same size.
Optionally, the cover plate is subjected to action balance detection after the dye-penetrant inspection, and the cover plate is used after the dye-penetrant inspection is qualified.
Optionally, the repair hole is a through hole penetrating through the thickness direction of the cover plate, and during laser cladding, one end of the repair hole is blocked by a baffle plate, and laser cladding material increase is performed from the other end of the repair hole.
Optionally, the machining allowance is in a range of 0.3mm to 0.8 mm.
Optionally, the laser cladding powder is nickel-based alloy powder, the nickel-based alloy powder is subjected to vacuum drying treatment before laser cladding additive manufacturing, the excavated repair hole region is polished to remove rust and remove an oxidation film, and then the nickel-based alloy powder is cleaned and dried by acetone.
Optionally, if the thickness of the repair hole is H and the thickness of the cladding single layer is H, the number of cladding layers is H/H +1, and 1 is the increased machining allowance.
Optionally, when measuring the size of the failure region, at least the width of the crack, the distance from the crack to the center of the cover plate, the size of the chipping region, and the distance from the chipping region to the center of the cover plate are measured.
Optionally, the repair holes are distributed at intervals along the circumferential direction of the cover plate and cover the failure area, and the centers of all the repair holes are on the same circumference.
Optionally, the laser power of the laser cladding material increase equipment is 800W-1200W, the diameter of a light spot is 1.2mm, the powder feeding amount is 3-5 g/s, the defocusing amount is 5mm, the scanning speed is 5-8 mm/s, coaxial powder feeding is adopted, and the single-layer powder feeding thickness is 0.3mm-0.8 mm.
The invention has the beneficial effects that: according to the method, materials in a failure area are removed, and then the failure area is repaired in a laser cladding material increasing mode, namely a reinforcing structure is formed at a crack or chipping position, so that the strength reduction caused by the crack or chipping is compensated; the repaired cover plate and the repaired impeller can meet the use requirements, the repair quality is improved, and the production cost of an enterprise is reduced.
Drawings
FIG. 1 is a schematic structural view of an impeller according to the present invention;
FIG. 2 is a schematic view of a failure zone of the impeller cover plate of the present invention;
FIG. 3 is a schematic view of the impeller cover plate hole digging of the present invention;
fig. 4 is a schematic view of the impeller cover plate after laser cladding material addition.
Part number description:
11-a first cover plate; 12-a second cover plate; 13-a blade; 2-repairing the hole; 3-cracking.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Examples
As shown in fig. 1, the general structure of a pump impeller includes first and second cover plates 11 and 12 and a vane 13 installed between the first and second cover plates 11 and 12. The cover plate of the impeller 13 is thin in wall and special in damage area, and usually in the middle of the impeller, as shown in fig. 2, cracks 3 are formed on the cover plate, and local parts also have falling blocks (the falling blocks are at A, B, C in fig. 2), and the damage position is special, so that the repair is not convenient unlike the conventional surface damage. The cracks 3 shown in fig. 2 may have different widths, not shown, and may also be free of cracks in certain positions.
Therefore, the present embodiment provides a method for repairing a pump impeller cover plate by hole digging and laser additive so as to repair damages such as crack and chipping of the cover plate, which includes the following steps:
1. derusting and cleaning the pump impeller with failure, wherein the derusting and cleaning area at least comprises a chipping and cracking area; the derusting refers to derusting the surface of the cover plate, and the cleaning refers to dust, oil stains and the like on the surface.
2. Measuring the size of a failure area on the cover plate, wherein the failure area comprises a crack and/or chipping area; specifically, the width of the crack, the width of the chipping region, the distance from the crack to the center of the cover plate, the distance from the chipping region to the center of the cover plate, and the like are measured with a measuring tool, such as a vernier caliper, so as to determine the parameters of the aperture of the repair hole (because the repair hole should cover the chipping region or the width of the crack), the distance from the repair hole to the center of the cover plate, and the like.
3. Drilling repair holes at positions corresponding to failure areas on the cover plate, wherein the repair holes are required to be drilled in the chipping areas, and the repair holes are drilled at positions with larger crack widths; the size of each repair hole is larger than the width of the crack or covers the chipping area, so that connection between the subsequent laser cladding material and the repair holes in the area adjacent to the repair holes in the radial direction of the cover plate is guaranteed.
When a plurality of repair holes are formed, the repair holes are distributed at intervals in the circumferential direction of the cover plate to form a structure similar to a reinforcing rib, and the inner ring and the outer ring of the cover plate, which are separated by cracks, are connected; the repair hole can be formed by drilling and reaming through a machining center.
4. And laser cladding material increase is carried out on each repair hole by adopting laser cladding equipment, the thickness of the laser cladding material increase is higher than that of the surface of the cover plate, and machining allowance is reserved so as to facilitate subsequent machining and ensure the shape and position precision of the cover plate.
5. Machining the position after cladding to meet the size requirement, namely removing the allowance part higher than the surface of the cover plate, and removing the allowance part in a milling mode, for example, performing rough machining and finish machining by using a machining center to recover the size, shape and position precision of the impeller;
6. and (4) performing dye check detection, namely detecting whether cracks exist in the repaired area by using a red industrial dye reagent, and delivering the repaired area for use after the repaired area is qualified.
According to the invention, materials in a failure area are removed firstly, and then the material is repaired in a laser cladding material increasing mode, namely a reinforcing structure is formed at a crack or chipping position, and the inner part and the outer part of the cover plate are connected due to crack separation, so that the strength reduction caused by crack or chipping is compensated; the repaired cover plate and the repaired impeller can meet the use requirements, the repair quality is improved, and the production cost of an enterprise is reduced.
In this example, the repair holes should be symmetrically formed with respect to the center of the cover plate, and the two symmetric repair holes have the same size (aperture and depth). As shown in fig. 3, the holes 2a and 2b are symmetrically arranged about the center of the cover plate, that is, the line connecting the centers of the holes 2a and 2b passes through the center of the cover plate; because the impeller is a high-speed rotating machine, the dynamic unbalance is strictly limited, and therefore in the step 3, the material is dug and planed symmetrically by taking the circle center as the center, the same material is filled, and the repaired dynamic unbalance is reduced.
Of the repair holes shown in fig. 3, one portion may be a repair hole provided corresponding to a crack or chipping region, and the other portion may be a hole initiated for achieving dynamic balance. Of course, if there are cracks along the circumferential direction of the cover plate, the repair holes may be distributed at intervals in a circle, and the symmetry is ensured. Fig. 4 is a schematic diagram of repaired cladding material which is higher than the surface of the cover plate and needs to be removed in the following process.
Since the cracks of the revolving body part are generally approximately on one circumference, in this example, the repair holes are distributed at intervals along the circumferential direction of the cover plate and cover the failure area (here, the holes do not need to completely cover all cracks, and only need to open holes at larger cracks), and the centers of all the repair holes are on the same circumference.
If the cover plate has two circles of cracks radially spaced, the repair hole can be two corresponding circles. In this example, the cover plate is subjected to dynamic balance detection after the dye-sensitized inspection, and is subjected to dynamic balance test according to GB9239, and is used after passing the detection by adopting weight-reducing balance.
The repairing holes are through holes penetrating through the thickness direction of the cover plate, one end of each repairing hole is blocked by a baffle (such as a ceramic plate) during laser cladding, and laser cladding material increase is carried out from the other end of each repairing hole. Because the space between the two cover plates is small, cladding equipment cannot extend into the space conveniently; therefore, in the embodiment, the impeller is horizontally placed, clamped and fixed, and the baffle plate is arranged between the two cover plates and is blocked at the lower end of the repair hole; the baffle is attached to the inner side of the cover plate to prevent the cladding material from flowing out; the laser cladding equipment carries out material increase cladding on the repair hole from the outer side of the cover plate, namely, coaxial powder feeding is adopted above the repair hole, namely, powder feeding and melting are carried out simultaneously, and the materials are clad in the hole layer by layer.
The laser cladding material increase equipment can adopt the existing equipment, the laser power is 800W-1200W, the diameter of a light spot is 1.2mm, the powder feeding amount is 3-5 g/s, the defocusing amount is 5mm, the scanning speed is 5-8 mm/s, the single-layer powder feeding thickness is 0.3mm-0.8mm, and in the embodiment, the single-layer powder feeding thickness is 0.5 mm. The equipment type is a fiber laser, and an industrial robot can adopt Kawasaki RS 030N.
And if the thickness of the repair hole is H and the thickness of the cladding single layer is H, the number of cladding layers is H/H +1, and 1 is the increased machining allowance.
Fig. 4 is a schematic diagram of the repaired additive, the rectangular portion is a portion protruding from the surface of the cover plate, and the range of the remaining machining allowance is 0.3mm-0.8mm, in this example, 0.5 mm.
In the embodiment, the laser cladding powder is nickel-based alloy powder, and the bonding strength of the powder is up to 90% of that of the impeller; the hardness reaches 50HRC of the surface hardness of the impeller. Before laser cladding material increase manufacturing, nickel-based alloy powder is subjected to vacuum drying treatment, the region of the excavated repair hole is polished to remove rust and remove an oxidation film, and then acetone is used for cleaning and drying to prepare for subsequent laser cladding.
Specifically, the nickel-based alloy powder needs to be dried for more than 2 hours in a vacuum box at the temperature of 150-200 ℃ before cladding. The nickel-based alloy powder belongs to the existing materials, such as Ni60 nickel-based alloy powder, Ni55A alloy powder and the like, wherein the chemical composition (Wt%) of the Ni55A alloy powder is as follows:
| C | Cr | Si | B | Fe | Ni HRC |
| 0.4 - 0.9 | 14 - 17 | 3.5 - 4.5 | 2.5 - 3.0 | ≤5 | the balance of 50-58 |
The hardness of the repair area can reach 52HRC, and the dynamic unbalance amount is less than 750 g.mm.
According to the method, materials in a failure area are removed, and then the failure area is repaired in a laser cladding material increasing mode, namely a reinforcing structure is formed at a crack or chipping position, so that the strength reduction caused by the crack or chipping is compensated; the repaired cover plate and the repaired impeller can meet the use requirements, the repair quality is improved, and the production cost of an enterprise is reduced.
Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (7)
1. A method for repairing a pump impeller cover plate by hole digging and laser additive is characterized in that: comprises the following steps of (a) carrying out,
a. derusting and cleaning a pump impeller cover plate to be treated;
b. measuring the size of a failure area on the cover plate, wherein the failure area comprises a crack and/or chipping area;
c. drilling repair holes in positions, corresponding to failure regions, on the cover plate, wherein the size of each repair hole is larger than the width of the crack or covers the chipping region, and when a plurality of repair holes are formed, the repair holes are distributed at intervals in the circumferential direction of the cover plate; drilling a repair hole in the chipping area, drilling a repair hole in the position with larger crack width, and drilling repair holes in all cracks;
d. performing laser cladding material increase on the repair hole, wherein the thickness of the laser cladding material increase is higher than that of the cover plate surface, and a machining allowance is reserved;
e. processing the position after cladding to meet the size requirement;
f. performing dye check detection, detecting whether cracks exist in the repaired area, and delivering for use after the repaired area is qualified;
the repair holes are symmetrically formed relative to the center of the cover plate, and the two symmetrical repair holes are the same in size; the repair holes are distributed at intervals along the circumferential direction of the cover plate and cover the failure area, and the circle centers of all the repair holes are on the same circumference; the repair hole is a through hole penetrating through the thickness direction of the cover plate, one end of the repair hole is blocked by the baffle plate during laser cladding, and laser cladding material increase is performed from the other end of the repair hole, specifically: the impeller is horizontally placed, clamped and fixed, and a baffle plate is arranged between the two cover plates and is blocked at the lower end of the repair hole; the baffle is attached to the inner side of the cover plate to prevent cladding materials from flowing out, and the laser cladding equipment carries out additive cladding on the repair hole from the outer side of the cover plate;
when the cover plate has two circles of cracks radially spaced, the repair hole is divided into two corresponding circles.
2. The method for repairing a pump impeller cover plate by hole digging and laser additive according to claim 1, wherein the method comprises the following steps: and carrying out action balance detection on the cover plate after the dye check detection, and using the cover plate after the dye check detection is qualified.
3. The method for repairing a pump impeller cover plate by hole digging and laser additive according to claim 1, wherein the method comprises the following steps: the range of the machining allowance is 0.3mm-0.8 mm.
4. The method for repairing a pump impeller cover plate by hole digging and laser additive according to claim 1, wherein the method comprises the following steps: the laser cladding powder is nickel-based alloy powder, the nickel-based alloy powder is subjected to vacuum drying treatment before laser cladding additive manufacturing, an excavated repair hole area is polished to remove rust and remove an oxidation film, and then the nickel-based alloy powder is cleaned and dried by acetone.
5. The method for repairing a pump impeller cover plate by hole digging and laser additive according to claim 1, wherein the method comprises the following steps: and if the thickness of the repair hole is H and the thickness of the cladding single layer is H, the number of cladding layers is H/H +1, and 1 is the increased machining allowance.
6. The method for repairing a pump impeller cover plate by hole digging and laser additive according to claim 1, wherein the method comprises the following steps: when the size of the failure area is measured, at least the width of the crack, the distance from the crack to the center of the cover plate, the size of the chipping area and the distance from the chipping area to the center of the cover plate are measured.
7. The method for repairing a pump impeller cover plate by hole digging and laser additive according to claim 1, wherein the method comprises the following steps: the laser power of the laser cladding material increase equipment is 800W-1200W, the diameter of a light spot is 1.2mm, the powder feeding amount is 3-5 g/s, the defocusing amount is 5mm, the scanning speed is 5-8 mm/s, coaxial powder feeding is adopted, and the single-layer powder feeding thickness is 0.3mm-0.8 mm.
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| CN202010000616.4A CN110977324B (en) | 2020-01-02 | 2020-01-02 | Method for repairing pump impeller cover plate by hole digging and laser additive |
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| CN202010000616.4A CN110977324B (en) | 2020-01-02 | 2020-01-02 | Method for repairing pump impeller cover plate by hole digging and laser additive |
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| CN111633374B (en) * | 2020-06-01 | 2021-12-31 | 湖北三江航天江北机械工程有限公司 | Method for repairing damage inside attitude control engine combustion chamber shell |
| CN112276086B (en) * | 2020-11-10 | 2021-08-27 | 西安交通大学 | Additive/equal-material preparation method for blade tenon |
| CN113042738B (en) * | 2021-03-10 | 2023-06-16 | 岭澳核电有限公司 | Pump cover plate material-adding repairing method and system for circulating water filtering system |
| CN114082961A (en) * | 2021-10-09 | 2022-02-25 | 华南理工大学 | Method for repairing surface cracks of steel structure through additive manufacturing |
| CN115847002B (en) * | 2023-02-24 | 2023-06-30 | 泽高新智造(广东)科技有限公司 | Laser additive repairing method for steel rail bolt hole |
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| US4851188A (en) * | 1987-12-21 | 1989-07-25 | United Technologies Corporation | Method for making a turbine blade having a wear resistant layer sintered to the blade tip surface |
| CN100455396C (en) * | 2005-12-26 | 2009-01-28 | 沈阳大陆激光技术有限公司 | Renovation technique of aerial engine flow guiding disc |
| CN101462218B (en) * | 2009-01-12 | 2010-06-02 | 梅县金象铜箔有限公司 | Method for repairing electrolytic copper foil cathode roll |
| US9352419B2 (en) * | 2011-01-13 | 2016-05-31 | Siemens Energy, Inc. | Laser re-melt repair of superalloys using flux |
| CN202622274U (en) * | 2012-06-29 | 2012-12-26 | 宁夏青龙塑料管材有限公司 | Vacuum pump impeller dynamic balance alignment device |
| CN105506616B (en) * | 2015-12-14 | 2017-05-10 | 西安文理学院 | Laser cladding nickel base alloy powder for repairing damaged blower vane and repair method |
| US20170368647A1 (en) * | 2016-06-24 | 2017-12-28 | General Electric Company | Methods for repairing film holes in a surface |
| CN106637188A (en) * | 2016-11-16 | 2017-05-10 | 中国人民解放军第五七九工厂 | Repair method of cavitation erosion of impeller tip of aeroengine booster pump impeller |
| EP3441181A1 (en) * | 2017-08-09 | 2019-02-13 | General Electric Company | Methods for treating components formed from equiaxed material or directionally solidified structure, and treated components |
| CN109261965A (en) * | 2018-11-09 | 2019-01-25 | 成都青石激光科技有限公司 | A kind of plugging technology of turbine buckets of gas turbine piece cover board apical pore |
| CN110158083B (en) * | 2019-06-25 | 2021-08-10 | 西安文理学院 | High-speed laser cladding alloy powder for surface strengthening of centrifugal compressor and method |
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