CN108620809B - Online repair method for steam seal shaft neck of steam turbine rotor of 1000MW generator set - Google Patents
Online repair method for steam seal shaft neck of steam turbine rotor of 1000MW generator set Download PDFInfo
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- CN108620809B CN108620809B CN201810447384.XA CN201810447384A CN108620809B CN 108620809 B CN108620809 B CN 108620809B CN 201810447384 A CN201810447384 A CN 201810447384A CN 108620809 B CN108620809 B CN 108620809B
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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
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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
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
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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
- C23C24/106—Coating with metal alloys or metal elements only
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- Chemical Kinetics & Catalysis (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
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Abstract
The invention provides an online repair method for a steam seal shaft neck of a steam turbine rotor of a 1000MW generator set, which is characterized in that a tray is arranged on the connecting end surface of a bearing support fixed shaft seal body, a tool rest is arranged on the tray, the rotor is continuously rotated through a turning device, a turning tool on the tool rest which is assembled and debugged is used for turning a steam seal groove and a boss of a damaged surface of the steam seal shaft neck, the steam seal groove and the boss of the damaged surface of the steam seal shaft neck are enabled to be in equal diameter size, laser equipment is arranged on the side of the steam seal shaft neck far away from the tool rest, and laser beams of the laser equipment are utilized for scanning metal alloy powder on the turning surface to perform cladding. The invention has the advantages of small man-machine engineering amount, short site construction time (5-10 days), no need of disassembling and transporting the rotor back and forth, small risk and low cost; the steam seal shaft neck can be ensured to be restored to the original design size precision; the laser cladding mode is adopted to repair the damaged part of the steam seal shaft neck, and the repairing layer has high bonding strength and good wear resistance.
Description
Technical Field
The invention relates to the technical field of steam turbine equipment, in particular to an online repair method for a steam seal shaft neck of a steam turbine rotor of a 1000MW generator set.
Background
The 1000MW supercritical large-scale steam turbine generator unit is the construction and development trend of the current domestic thermal power generation device and is also the core equipment of the thermal power generation industry in China. The steam turbine is provided with a stator and a rotor, the stator is fixed when the steam turbine is started to operate, and the rotor rotates at a high speed, so that a certain gap is formed between the rotor and the stator; when steam flows through each stage of the steam turbine to work, except that most of the steam flows through passages of the guide vanes and the movable blades to do work, a small part of the steam flows through the gaps without doing work, so that energy loss is realized, and the efficiency of a unit is reduced.
The shaft neck parts of the cylinder are arranged at two ends of the rotor in groups, so that the purpose of preventing air leakage due to shaft end gaps is realized, and the efficient operation of a steam turbine is ensured. However, the steam seal shaft neck of the steam turbine rotor is abraded due to large vibration or improper equipment management during the operation of the equipment, so that steam leakage or air entering is caused, the safe and stable operation of the unit is affected, and therefore the repair treatment is required.
However, the steam turbine rotor generally adopts a mode of returning to the factory for repairing damage due to large volume, heavy mass and inconvenient field processing, but the returning to the factory for repairing firstly needs to uncover a cylinder to lift the rotor and then reinstall the rotor at a later stage, so that the method has the defects of large man-machine engineering quantity, inconvenient round-trip transportation (dozens of tons of weight), large risk, high cost and long returning to the factory for repairing (at least 3-6 months).
Disclosure of Invention
The invention aims to provide an online repair method for a steam seal shaft neck of a steam turbine rotor of a 1000MW generator set, which adopts laser cladding and a tool rest device arranged on the connecting end surface of a bearing support to turn a steam seal groove on line for repairing, aiming at the defects of large man-machine engineering quantity, inconvenient round trip transportation, high risk, high cost, long repair cycle after returning to a factory and the like in the background technology.
The online repair method for the steam seal shaft neck of the steam turbine rotor of the 1000MW generator set is characterized by comprising the following steps of:
1) and removing the upper half part of the turbine shaft seal body, and cleaning the shaft neck of the steam seal.
2) And carrying out hardness detection and dye check detection on the damaged surface of the steam seal shaft neck.
3) And a tray is arranged on the connecting end surface of the bearing support fixed shaft seal body, and the connecting end surface of the tray is contacted with the connecting end surface of the bearing support fixed shaft seal body.
4) And a tool rest is arranged on the tray.
5) Turning: turning the gland sealing shaft neck damage by turning the rotor continuously by the turning gear and using the turning tool on the assembled and debugged tool rest
And the steam seal groove and the boss of the damaged surface of the steam seal journal are flattened in the same diameter size, the turning width is determined according to the damage range, and the turning depth is determined according to the depth of the fatigue layer.
6) Performing hardness detection and dye check detection on the turned damaged surface, namely the turned surface, and after detecting that the base material has no fatigue damage,
and cleaning the steam seal shaft neck.
7) The laser device is arranged on the side of the gland bush journal away from the tool holder, so that the cladding area of the laser device is separated from the machining area of the tool holder.
8) Blowing metal alloy powder to a turning surface by using a powder feeder, wherein the metal alloy powder comprises the following alloy elements in percentage by mass: fe 60-55%, Cr 20-16%, Ni 15-10%, Mo 5-2%, Nb 3-1%, Ti 2-0.1%, and W1-0.5%.
9) Cladding: and scanning the metal alloy powder on the turning surface by using laser beams of laser equipment, and cladding to form a repairing layer.
10) And (4) continuously rotating the rotor through a turning gear, and roughly turning the repair layer.
11) And (3) carrying out hardness detection and dye check detection on the roughly turned repairing layer, wherein the detected repairing layer is free of defects and has hardness within the range of +/-HB 15 of the hardness of the base material.
12) And after the detection is finished, finely turning the repairing layer to enable the repairing layer to reach the design size of the boss.
13) And continuously rotating the rotor through the turning device, and turning the steam seal groove by using a forming cutter on the cutter rest, so that the steam seal groove reaches the design size, and a new steam seal groove is obtained.
14) And a new steam seal sheet is arranged on the new steam seal groove.
15) And turning the outer circle of the new steam seal piece by using a turning tool on the tool rest, so that the size of the outer circle of the new steam seal piece reaches the design size of the new steam seal piece.
16) And (3) re-installing the upper half part of the turbine shaft seal body dismantled in the step 1).
In one embodiment, the cleaning in step 1) is performed using a cleaning agent or absolute ethanol.
In one embodiment, in step 3), the tray may be mounted on the connecting end surface of the bearing support fixing shaft seal body by using bolts and bolt holes on the connecting end surface of the bearing support fixing shaft seal body, and the connecting end surface of the tray is in contact with the connecting end surface of the bearing support fixing shaft seal body.
In one embodiment, in the step 5), grooves are formed at two ends of the turning region during turning, so that the turning region can be conveniently and well overlapped with a base surface during laser scanning cladding.
In one embodiment, argon is used as a powder feeding gas source of the powder feeder in the step 8), and argon synchronously enters the molten pool as a protective gas in the repairing process of the step 9).
In one embodiment, in the step 9), when the continuous turning speed exceeds the scanning speed of the cladding process, laser cladding can be performed on 8-12 sections in the circumferential direction of the journal under the condition of discontinuous turning, the cladding arc length is controlled to be 180-230 mm, after one section is cladded and the journal is turned for 180 degrees, another section is symmetrically cladded, high points formed by overlapping adjacent cladding sections are locally polished and cleaned, and turning in the next procedure is facilitated.
In one embodiment, in the step 9), the laser cladding power is 3000W, the scanning speed is 1100-1200 mm/min, the spot is 4 × 5mm, the cladding thickness of each layer is 0.8-1 mm, and the cladding size is larger than the boss size.
In one implementation, in the step 13), after the position of the steam seal groove is marked on the repair layer by using an alloy needle clamped on a tool rest, the rotor is continuously rotated by a turning device, and the steam seal groove is turned by a forming tool, so that the steam seal groove reaches the design size.
In one embodiment, the supporting arm is arranged on the tray in the step 3).
Advantages and advantageous effects of the invention
According to the invention, the damaged steam seal shaft neck is repaired by adopting laser cladding and online turning of the steam seal groove by the tool rest arranged on the connecting end surface of the bearing support fixed shaft seal body, so that the man-machine engineering quantity is small, the field construction time is short (5-10 days), the rotor does not need to be disassembled and transported back and forth, the risk is small, and the cost is low; the steam seal shaft neck can be ensured to be restored to the original design size precision; the laser cladding mode is adopted to repair the damaged part of the steam seal shaft neck, and the repairing layer has high bonding strength and good wear resistance. The iron-based alloy used in the invention has the advantages of good wear resistance, wide application and controllable production cost, and by adding alloy elements such as Cr, Ni, Ti, W and the like, the heat resistance, corrosion resistance and oxidation resistance of the iron-based alloy are improved, the toughness of the cladding layer is enhanced, and meanwhile, the addition of Nb and Mo can effectively inhibit brittle phases, reduce crack sensitivity, make the structure more compact and finer, improve microhardness and enhance the crack resistance of the cladding layer.
Drawings
Fig. 1 is a schematic structural diagram of a gland sealing shaft neck, a tool rest, a tray and a laser device.
Fig. 2 is a schematic structural view of the tray connecting end face and the tray.
Detailed Description
In order that the above objects, features and advantages of the present invention will be readily understood, numerous specific details are set forth in the following description in order to provide a thorough understanding of the present invention. This invention can be practiced in many ways other than those described herein and those skilled in the art will be able to make similar modifications without departing from the spirit of the invention and it is therefore not intended to be limited to the specific embodiments disclosed.
Example 1
In this embodiment, a 1000MW steam turbine set manufactured by the above sea turbine Co., Ltd., model No. N1000-28/600/620, and a rotor shaft made of 26NiCrMoV14-5 are exemplified.
Referring to fig. 1 and fig. 2, an online repairing method for a steam seal journal of a steam turbine rotor of a 1000MW generator set includes the following steps:
1) and (3) removing the upper half part of the turbine shaft seal body, and then cleaning the steam seal shaft neck 7 by using a cleaning agent or absolute ethyl alcohol.
2) And carrying out hardness detection and dye check detection on the damaged surface of the gland sealing shaft neck 7.
3) The tray 3 is mounted on the connection end face 1 of the bearing support fixing shaft seal body by using bolts, and the connection end face 31 of the tray is fixed with the connection end face 1 of the bearing support fixing shaft seal body.
4) A tool holder 5 is mounted on the tray.
5) Turning: the rotor is continuously rotated by the turning gear, and the turning tool on the assembled and debugged tool rest 5 is used for turning the gland sealing shaft neck
The steam seal groove and the boss of the damaged surface form grooves at two ends of the turning area during turning, so that the laser scanning cladding in the next step can be conveniently and well overlapped with the base surface (the base surface refers to a side wall surface); and the steam seal groove and the boss on the damaged surface of the steam seal journal 7 are flattened in the same diameter size, the turning width is determined according to the damage range, and the turning depth is determined according to the depth of the fatigue layer.
6) And (3) carrying out hardness detection and dye penetrant inspection detection on the turned damaged surface, namely the turned surface, and cleaning the steam seal shaft neck 7 after detecting that the base material has no fatigue damage.
5) On the side of the gland journal 7 remote from the tool holder 5, a laser device 9 is arranged, so that the cladding region of the laser device 9 is separated from the machining region of the tool holder 5.
8) Blowing metal alloy powder to a turning surface by using a powder feeder, wherein the metal alloy powder comprises the following alloy elements in percentage by mass: fe 60-55%, Cr 20-16%, Ni 15-10%, Mo 5-2%, Nb 3-1%, Ti 2-0.1%, and W1-0.5%.
9) Cladding: the laser beam of the laser device 9 is used for scanning metal alloy powder on a turning surface, when the continuous turning speed exceeds the scanning speed of a cladding process, segmented laser cladding is carried out according to 10 sections in the circumferential direction of a shaft neck under the condition of discontinuous turning, the laser cladding power is 3000W, the scanning speed is 1150mm/min, the light spot is 4 multiplied by 5mm, the cladding thickness of each layer is 0.8-1 mm, the cladding arc length is controlled to be 200mm, another section is symmetrically clad after 7 turning degrees of a steam seal shaft neck are carried out for every cladding section, high points formed by overlapping adjacent cladding sections are locally polished and cleaned, turning in the next procedure is facilitated, a repairing layer is formed after cladding, and the cladding size is larger than the boss size.
10) And (4) continuously rotating the rotor through a turning gear, and roughly turning the repair layer.
11) And (3) carrying out hardness detection and dye check detection on the roughly turned repairing layer, wherein the detected repairing layer is free of defects and has hardness within the range of +/-HB 15 of the hardness of the base material.
12) And after the detection is finished, performing finish turning on the repairing layer to enable the repairing layer to reach the design size of the boss of the steam seal journal 7.
13) Firstly, after an alloy needle clamped on a tool rest is used for marking a steam seal groove position on a repairing layer, the rotor is continuously rotated through a barring gear, and a forming tool on the tool rest 5 is used for turning the steam seal groove, so that the steam seal groove reaches the design size, and a new steam seal groove is obtained.
14) And a new steam seal sheet is arranged on the new steam seal groove.
15) The rotor is continuously rotated through the turning device, and the outer circle of the new steam seal piece is turned by the turning tool on the tool rest 5, so that the size of the outer circle of the new steam seal piece reaches the design size.
16) And (3) re-installing the upper half part of the turbine shaft seal body dismantled in the step 1).
In the step 8), argon is used as a powder feeding gas source of the powder feeder, and in the repairing process of the step 9), argon synchronously enters a molten pool to be used as a protective gas. The supporting arm 33 is arranged on the tray 3 in the step 3).
Advantages and advantageous effects of the invention
According to the invention, the steam seal groove is turned on line by adopting laser cladding and the tool rest device arranged on the connecting end surface 1 of the bearing support fixed shaft seal body to repair the damaged steam seal shaft neck 7, so that the man-machine engineering quantity is small, the field construction time is short (5-10 days), the rotor does not need to be disassembled and transported back and forth, the risk is small, and the cost is low; the gland sealing shaft neck 7 can be ensured to be restored to the original design size precision; the laser cladding mode is adopted to repair the damaged part of the steam seal shaft neck 7, and the repairing layer has high bonding strength and good wear resistance. The iron-based alloy used in the invention has the advantages of good wear resistance, wide application and controllable production cost, and by adding alloy elements such as Cr, Ni, Ti, W and the like, the heat resistance, corrosion resistance and oxidation resistance of the iron-based alloy are improved, the toughness of the cladding layer is enhanced, and meanwhile, the addition of Nb and Mo can effectively inhibit brittle phases, reduce crack sensitivity, make the structure more compact and finer, improve microhardness and enhance the crack resistance of the cladding layer.
The embodiment of the present invention is only one embodiment of the present invention, and the description is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent should be subject to the appended claims.
Claims (9)
1. The online repair method for the steam seal shaft neck of the steam turbine rotor of the 1000MW generator set is characterized by comprising the following steps of:
1) removing the upper half part of the steam turbine shaft seal body, and then cleaning a steam seal shaft neck;
2) carrying out hardness detection and dye check detection on the damaged surface of the steam seal journal;
3) a tray is arranged on the connecting end surface of the bearing support fixing shaft seal body, and the connecting end surface of the tray is contacted with the connecting end surface of the bearing support fixing shaft seal body;
4) a tool rest is arranged on the tray;
5) turning: continuously rotating the rotor through a turning device, turning a steam seal groove and a boss of a damaged surface of the steam seal journal by using a turning tool on an assembled and debugged tool rest, and flattening the steam seal groove and the boss of the damaged surface of the steam seal journal into equal-diameter sizes, wherein the turning width is determined according to the damage range, and the turning depth is determined according to the depth of a fatigue layer;
6) carrying out hardness detection and dye penetrant inspection detection on the turned damaged surface, namely the turned surface, and cleaning the steam seal shaft neck after detecting that the base material has no fatigue damage;
7) configuring a laser device on a side of the gland journal remote from the tool holder such that a cladding region of the laser device is spaced apart from a machining region of the tool holder;
8) blowing metal alloy powder to a turning surface by using a powder feeder, wherein the metal alloy powder comprises the following alloy elements in percentage by mass: fe 60-55%, Cr 20-16%, Ni 15-10%, Mo 5-2%, Nb 3-1%, Ti 2-0.1%, and W1-0.5%;
9) cladding: scanning metal alloy powder on the turning surface by using laser beams of laser equipment, and cladding to form a repairing layer;
10) continuously rotating the rotor through a turning gear, and roughly turning the repair layer;
11) carrying out hardness detection and dye check detection on the roughly turned repairing layer, wherein the detected repairing layer is free of defects and has hardness within the range of +/-HB 15 of the hardness of the base material;
12) after the detection is finished, finely turning the repairing layer to enable the repairing layer to reach the design size of the boss;
13) continuously rotating the rotor through a turning device, and turning the steam seal groove by using a forming cutter on a cutter rest to enable the steam seal groove to reach the design size of the steam seal groove, so as to obtain a new steam seal groove;
14) installing a new steam seal sheet on the new steam seal groove;
15) turning the outer circle of the new steam seal piece by using a turning tool on a tool rest to enable the size of the outer circle of the new steam seal piece to reach the design size;
16) and (3) re-installing the upper half part of the turbine shaft seal body dismantled in the step 1).
2. The online repair method for the steam seal shaft neck of the steam turbine rotor of the 1000MW generator set according to claim 1, wherein the step 1) is carried out by using a cleaning agent or absolute ethyl alcohol.
3. The online repair method for the steam seal journal of the steam turbine rotor of the 1000MW generator set according to claim 1, wherein in the step 3), the tray is installed on the connecting end surface of the bearing support fixing shaft seal body by using bolts and bolt holes on the connecting end surface of the bearing support fixing shaft seal body, and the connecting end surface of the tray is in contact with the connecting end surface of the bearing support fixing shaft seal body.
4. The online repair method for the steam seal shaft neck of the steam turbine rotor of the 1000MW generator set according to claim 1, wherein in the step 5), grooves are formed at two ends of a turning area during turning, so that the laser scanning cladding can be conveniently and well overlapped with a base surface.
5. The online repair method for the gland sealing shaft neck of the steam turbine rotor of the 1000MW generator set according to claim 1, wherein in the step 8), argon is used as a powder feeding gas source of a powder feeder, and in the repair process of the step 9), argon synchronously enters a molten pool to be used as a protective gas.
6. The online repair method for the steam turbine rotor gland sealing shaft neck of the 1000MW generator set according to claim 1, characterized in that in step 9), when the continuous turning speed exceeds the scanning speed of the cladding process, laser cladding can be performed according to 8-12 sections in the circumferential direction of the shaft neck under the condition of discontinuous turning, the cladding arc length is controlled to be 180-230 mm, after turning 180 degrees for each cladding section, the gland sealing shaft neck is symmetrically clad for another section, high points formed by overlapping of adjacent cladding sections are locally polished and cleaned, and turning in the next procedure is facilitated.
7. The online repair method for the gland sealing shaft neck of the steam turbine rotor of the 1000MW generator set according to claim 1, wherein in the step 9), the laser cladding power is 3000W, the scanning speed is 1100-1200 mm/min, the light spot is 4 x 5mm, the cladding thickness of each layer is 0.8-1 mm, and the cladding size is larger than the boss size.
8. The online repair method for the steam seal shaft neck of the steam turbine rotor of the 1000MW generator set according to claim 1, wherein in the step 13), after the alloy needle clamped on the tool rest is used for marking the steam seal groove position on the repair layer, the rotor is continuously rotated through a barring gear, and the steam seal groove is turned by a forming tool, so that the steam seal groove reaches the design size.
9. The method for repairing the gland sealing shaft neck of the steam turbine rotor of the 1000MW generator set according to the claim 1, wherein the supporting arm is arranged on the tray in the step 3).
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| CN109454397B (en) * | 2018-10-23 | 2020-01-31 | 岳阳大陆激光技术有限公司 | method for repairing filler cylinder of rotary drum type vacuum filter |
| CN109536945A (en) * | 2018-11-30 | 2019-03-29 | 成都大陆激光技术有限公司 | A method of repairing generator rotor shaft neck |
| CN110052778B (en) * | 2019-05-29 | 2023-12-19 | 常州市醇通机械科技有限公司 | Large gear shaft end repairing device |
| CN113020891A (en) * | 2019-12-24 | 2021-06-25 | 中国石油天然气股份有限公司 | Valve maintenance method |
| CN111455288A (en) * | 2020-05-29 | 2020-07-28 | 燕山大学 | Laser cladding repair material for road simulation testing machine rotating hub and remanufacturing method |
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| JPS63248587A (en) * | 1987-04-03 | 1988-10-14 | Toshiba Corp | Turbine rotor and its build-up welding method |
| US20100236067A1 (en) * | 2006-08-01 | 2010-09-23 | Honeywell International, Inc. | Hybrid welding repair of gas turbine superalloy components |
| CN102677048A (en) * | 2012-05-27 | 2012-09-19 | 丹阳市宏图机械制造有限公司 | Laser repairing technology for high-speed motor rotor |
| CN102828181A (en) * | 2012-09-20 | 2012-12-19 | 丹阳宏图激光科技有限公司 | Laser cladding repair process for cross shafts |
| CN103352221B (en) * | 2013-07-24 | 2015-05-27 | 中国华电工程(集团)有限公司 | High speed rotating machinery axle laser cladding repair alloy powder and repair method |
| CN203382820U (en) * | 2013-08-07 | 2014-01-08 | 兰晋 | Multifunctional integrated laser cladding equipment |
| CN104532233B (en) * | 2015-01-28 | 2018-02-06 | 河北瑞兆激光电机修复有限公司 | Rotor axle position laser melting coating restorative procedure |
| CN105018926B (en) * | 2015-07-09 | 2018-03-20 | 青岛前进船厂 | A kind of steam turbine rotor damage rehabilitation method |
| DE102015219513B4 (en) * | 2015-10-08 | 2022-05-05 | MTU Aero Engines AG | Repair procedure for sealing segments |
| CN105256249A (en) * | 2015-11-19 | 2016-01-20 | 中国航空工业集团公司北京航空材料研究院 | Laser cladding repairing method for aircraft end-journal part surface |
| CN106435565A (en) * | 2016-07-08 | 2017-02-22 | 浙江工业大学 | Iron-based alloy powder for laser refabrication of rotor journal, and refabrication method thereof |
| CN107557781B (en) * | 2017-08-29 | 2019-05-10 | 天津铸金科技开发股份有限公司 | A kind of laser melting and coating process high rigidity corrosion resistant alloy powder and preparation method thereof |
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