CN112981389A - Laser repair method for propeller shaft - Google Patents
Laser repair method for propeller shaft Download PDFInfo
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- CN112981389A CN112981389A CN201911286693.4A CN201911286693A CN112981389A CN 112981389 A CN112981389 A CN 112981389A CN 201911286693 A CN201911286693 A CN 201911286693A CN 112981389 A CN112981389 A CN 112981389A
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- laser
- propeller shaft
- cladding
- detecting
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Classifications
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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
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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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention relates to a laser repair method of a propeller shaft, which utilizes laser cladding to repair the propeller shaft, and particularly heats the surface of a substrate and added alloy powder under the action of heat by heating a high-energy laser beam on the surface of metal to rapidly heat and melt the surface of the substrate and the added alloy powder to form a metallurgical bonding surface cladding layer with extremely low dilution rate, and repairs the propeller shaft by adopting a laser cladding process, so that the propeller shaft has better wear resistance and corrosion resistance.
Description
Technical Field
The invention relates to the technical field of laser welding processes, in particular to a laser repairing method for a propeller shaft of a propeller.
Background
When a ship sails on the water surface or in water, the ship suffers from resistance, the size of the resistance is related to the size, shape and sailing speed of the ship, and in order to keep the ship sailing forward at a certain speed, the ship must be provided with thrust which is larger than the resistance to generate power, and a propeller is born by the thrust. The propeller is used as a core mechanism of the ship, has very high requirements on size and assembly precision, and has very high requirements on the structure performance and the mechanical property of the body material of each part. The propeller shaft is used as a key part for ship power output and propeller power transmission, and plays a key role in forward power of the ship. The abrasion, the strain and the like of the propeller shaft can influence the normal operation of the whole set of power system of the ship, and the influence is very large if the ship is carelessly anchored in the midway. Because of the influence of long manufacturing cycle, high replacement cost and the like, the damaged propeller shaft is mainly repaired. The ordinary repair process has the influences of deformation of the propeller shaft, change of the tissue performance of the body and the like due to overhigh heat input on the propeller shaft repair. The laser repair method for the propeller shaft can avoid deformation of the propeller shaft, and the dilution rate of a cladding layer is less than 5 percent, which is a technical problem urgently needed to be solved by the technical personnel in the field.
Disclosure of Invention
The invention aims to provide a laser repair method for a propeller shaft, which can avoid deformation of the propeller shaft and has a cladding layer dilution rate of less than 5%.
In order to solve the technical problem, the laser repair method of the propeller shaft provided by the invention comprises the following steps:
A. cleaning the propeller shaft, detecting the size of the propeller shaft, and determining the abrasion part and the abrasion amount of the propeller shaft; removing a wear fatigue layer and a corrosion fatigue layer at the wear part of the propeller shaft according to the detection result; and detecting the hardness of the unworn part;
B. detecting the worn part with the worn fatigue layer and the corroded fatigue layer removed by adopting PT flaw detection to ensure that the worn part has no surface defect and internal defect;
C. mixing the alloy powder prepared in proportion, and adding the mixed alloy powder into a powder conveying system;
D. fixing a propeller shaft on a machine tool, adopting a warehouse-card robot to match with a fiber laser to perform continuous scanning, setting cladding technological parameters of the fiber laser, performing laser cladding on the surface to be repaired by adopting a pneumatic coaxial powder feeding method, wherein the powder feeding speed is 25 g-35 g/min, cladding 2-3 layers on the surface of the worn part of the propeller shaft, and the thickness of an alloy cladding layer is not less than 0.5 mm;
E. a vent pipe is arranged on one side of the laser molten pool and used for introducing inert gas into the cooled laser molten pool for cooling;
F. grinding the cooled laser deposited part, and performing PT flaw detection again to ensure that the size and the surface quality of the propeller shaft meet the requirements; and detecting the hardness of the laser deposited part to ensure that the hardness of the propeller shaft after laser deposition meets the requirement.
Further, in the step C, the adopted alloy powder comprises the following components in percentage by weight: 0.008% to 0.018%, Cr: 15 to 20%, Si: 0.2 to 0.6%, Mo: 2 to 3%, Mn: 0.5 to 1%, Ni: 10 to 13 percent, and the balance of Fe.
Further, in the step D, the laser power of the fiber laser is 1600W to 2100W, and the elevation is 300mm to 325 mm.
Further, in the step D, the spot size of the optical fiber laser is 4mm multiplied by 4mm, the scanning speed is 600mm/min to 1000mm/min, and the lap joint quantity is 2 mm.
Further, the inert gas in the step E is argon.
The invention has the technical effects that: the laser repair method of propeller shaft of the invention, compared with the prior art, is realized by high-energy laser beam (10)4~105W/cm2) The method is characterized in that the surface of a base body and added alloy powder are rapidly heated and melted under the action of heat by heating the surface of a metal to form a metallurgical bonding surface cladding layer with extremely low dilution rate, a propeller shaft is repaired by adopting a laser cladding process, and the method has more excellent wear resistance and corrosion resistance.
Detailed Description
Example 1
A laser repairing method for a propeller shaft comprises the following steps:
A. cleaning the propeller shaft, detecting the size of the propeller shaft, and determining the abrasion part and the abrasion amount of the propeller shaft; removing a wear fatigue layer and a corrosion fatigue layer at the wear part of the propeller shaft according to the detection result; and detecting the hardness of the unworn part;
B. detecting the worn part with the worn fatigue layer and the corroded fatigue layer removed by adopting PT flaw detection to ensure that the worn part has no surface defect and internal defect;
C. mixing the alloy powder prepared in proportion, and adding the mixed alloy powder into a powder conveying system; the adopted alloy powder comprises the following components in percentage by weight: 0.010%, Cr: 20%, Si: 0.6%, Mo: 3%, Mn: 1%, Ni: 13 percent, and the balance of Fe; the stable and reliable powder conveying system is an important guarantee for the repair quality of metal parts, and the fluctuation of powder conveying influences the repair quality; the basic requirements of laser repair on powder feeding are to continuously, stably, uniformly and controllably feed powder into a laser molten pool;
D. fixing a propeller shaft on a machine tool, adopting a warehouse-card robot to match with a fiber laser to perform continuous scanning, setting cladding technological parameters of the fiber laser, performing laser cladding on the surface to be repaired by adopting a pneumatic coaxial powder feeding method, wherein the powder feeding speed is 25g/min, cladding 2 layers on the surface of the worn part of the propeller shaft, and the thickness of an alloy cladding layer is 0.5-0.75 mm; the laser power of the fiber laser is 2100W, the elevation is 325mm, the spot size of the fiber laser is 4mm multiplied by 4mm, the scanning speed is 1000mm/min, and the lap joint quantity is 2 mm; when the scanning speed is too high, the phenomenon of discontinuous cladding layer occurs, and the bonding strength is not enough; the dilution rate is in a decreasing trend along with the increase of the scanning speed, and the dilution rate is in an increasing trend along with the increase of the powder feeding amount;
E. a vent pipe is arranged on one side of the laser molten pool and used for introducing argon into the laser molten pool in cooling for cooling;
F. grinding the cooled laser deposited part, and performing PT flaw detection again to ensure that the size and the surface quality of the propeller shaft meet the requirements; and detecting the hardness of the laser deposited part to ensure that the hardness of the propeller shaft after laser deposition meets the requirement.
Example 2
A laser repairing method for a propeller shaft comprises the following steps:
A. cleaning the propeller shaft, detecting the size of the propeller shaft, and determining the abrasion part and the abrasion amount of the propeller shaft; removing a wear fatigue layer and a corrosion fatigue layer at the wear part of the propeller shaft according to the detection result; and detecting the hardness of the unworn part;
B. detecting the worn part with the worn fatigue layer and the corroded fatigue layer removed by adopting PT flaw detection to ensure that the worn part has no surface defect and internal defect;
C. mixing the alloy powder prepared in proportion, and adding the mixed alloy powder into a powder conveying system; the adopted alloy powder comprises the following components in percentage by weight: 0.012%, Cr: 18%, Si: 0.4%, Mo: 2.5%, Mn: 0.7%, Ni: 11.5 percent, and the balance of Fe;
D. fixing a propeller shaft on a machine tool, adopting a warehouse-card robot to match with a fiber laser to perform continuous scanning, setting cladding technological parameters of the fiber laser, performing laser cladding on the surface to be repaired by adopting a pneumatic coaxial powder feeding method, wherein the powder feeding speed is 30g/min, cladding 3 layers on the surface of the worn part of the propeller shaft, and the thickness of an alloy cladding layer is 0.5-0.7 mm; the laser power of the fiber laser is 1800W, the elevation is 315mm, the spot size of the fiber laser is 4mm multiplied by 4mm, the scanning speed is 800mm/min, and the lap joint quantity is 2 mm;
E. a vent pipe is arranged on one side of the laser molten pool and used for introducing argon into the laser molten pool in cooling for cooling;
F. grinding the cooled laser deposited part, and performing PT flaw detection again to ensure that the size and the surface quality of the propeller shaft meet the requirements; and detecting the hardness of the laser deposited part to ensure that the hardness of the propeller shaft after laser deposition meets the requirement.
Example 3
A laser repairing method for a propeller shaft comprises the following steps:
A. cleaning the propeller shaft, detecting the size of the propeller shaft, and determining the abrasion part and the abrasion amount of the propeller shaft; removing a wear fatigue layer and a corrosion fatigue layer at the wear part of the propeller shaft according to the detection result; and detecting the hardness of the unworn part;
B. detecting the worn part with the worn fatigue layer and the corroded fatigue layer removed by adopting PT flaw detection to ensure that the worn part has no surface defect and internal defect;
C. mixing the alloy powder prepared in proportion, and adding the mixed alloy powder into a powder conveying system; the adopted alloy powder comprises the following components in percentage by weight: 0.018%, Cr: 15%, Si: 0.3%, Mo: 2.5%, Mn: 0.8%, Ni: 10.5 percent, and the balance of Fe;
D. fixing a propeller shaft on a machine tool, adopting a warehouse-card robot to match with a fiber laser to perform continuous scanning, setting cladding technological parameters of the fiber laser, performing laser cladding on the surface to be repaired by adopting a pneumatic coaxial powder feeding method, wherein the powder feeding speed is 35g/min, cladding 3 layers on the surface of the worn part of the propeller shaft, and the thickness of an alloy cladding layer is 0.6-0.75 mm; the laser power of the fiber laser is 1600W, the elevation is 300mm, the spot size of the fiber laser is 4mm multiplied by 4mm, the scanning speed is 600mm/min, and the lap joint quantity is 2 mm;
E. a vent pipe is arranged on one side of the laser molten pool and used for introducing argon into the laser molten pool in cooling for cooling;
F. grinding the cooled laser deposited part, and performing PT flaw detection again to ensure that the size and the surface quality of the propeller shaft meet the requirements; and detecting the hardness of the laser deposited part to ensure that the hardness of the propeller shaft after laser deposition meets the requirement.
Example 4
A laser repairing method for a propeller shaft comprises the following steps:
A. cleaning the propeller shaft, detecting the size of the propeller shaft, and determining the abrasion part and the abrasion amount of the propeller shaft; removing a wear fatigue layer and a corrosion fatigue layer at the wear part of the propeller shaft according to the detection result; and detecting the hardness of the unworn part;
B. detecting the worn part with the worn fatigue layer and the corroded fatigue layer removed by adopting PT flaw detection to ensure that the worn part has no surface defect and internal defect;
C. mixing the alloy powder prepared in proportion, and adding the mixed alloy powder into a powder conveying system; the adopted alloy powder comprises the following components in percentage by weight: 0.012%, Cr: 18%, Si: 0.5%, Mo: 2.5%, Mn: 0.8%, Ni: 12.5 percent and the balance of Fe;
D. fixing a propeller shaft on a machine tool, adopting a warehouse-card robot to match with a fiber laser to perform continuous scanning, setting cladding technological parameters of the fiber laser, performing laser cladding on the surface to be repaired by adopting a pneumatic coaxial powder feeding method, wherein the powder feeding speed is 30g/min, cladding 3 layers on the surface of the worn part of the propeller shaft, and the thickness of an alloy cladding layer is 0.7-0.9 mm; the laser power of the fiber laser is 2000W, the elevation is 305mm, the spot size of the fiber laser is 4mm multiplied by 4mm, the scanning speed is 900mm/min, and the lap joint quantity is 2 mm;
E. a vent pipe is arranged on one side of the laser molten pool and used for introducing argon into the laser molten pool in cooling for cooling;
F. grinding the cooled laser deposited part, and performing PT flaw detection again to ensure that the size and the surface quality of the propeller shaft meet the requirements; and detecting the hardness of the laser deposited part to ensure that the hardness of the propeller shaft after laser deposition meets the requirement.
In Greece, one commercial ship is maintained in a Jiangyun shipyard, the propeller shaft of the propeller needs to be repaired in an emergency, I can smoothly complete the process according to the process and pass the inspection of French classification society, the hardness of the repaired worn part is detected, and the detected strength completely meets the requirement; and metallographic detection is carried out on the repaired part of the propeller shaft of the propeller, the volume depth of the base material is about 0.03mm and the height of the cladding layer is about 0.58mm according to metallographic photos and a ruler, and the dilution rate of the cladding layer is about 4.9 percent through calculation.
It should be understood that the above examples are only for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And such obvious variations or modifications which fall within the spirit of the invention are intended to be covered by the scope of the present invention.
Claims (5)
1. A laser repairing method for a propeller shaft is characterized by comprising the following steps:
A. cleaning the propeller shaft, detecting the size of the propeller shaft, and determining the abrasion part and the abrasion amount of the propeller shaft; removing a wear fatigue layer and a corrosion fatigue layer at the wear part of the propeller shaft according to the detection result; and detecting the hardness of the unworn part;
B. detecting the worn part with the worn fatigue layer and the corroded fatigue layer removed by adopting PT flaw detection to ensure that the worn part has no surface defect and internal defect;
C. mixing the alloy powder prepared in proportion, and adding the mixed alloy powder into a powder conveying system;
D. fixing a propeller shaft on a machine tool, adopting a warehouse-card robot to match with a fiber laser to perform continuous scanning, setting cladding technological parameters of the fiber laser, performing laser cladding on the surface to be repaired by adopting a pneumatic coaxial powder feeding method, wherein the powder feeding speed is 25 g-35 g/min, cladding 2-3 layers on the surface of the worn part of the propeller shaft, and the thickness of an alloy cladding layer is not less than 0.5 mm;
E. a vent pipe is arranged on one side of the laser molten pool and used for introducing inert gas into the cooled laser molten pool for cooling;
F. grinding the cooled laser deposited part, and performing PT flaw detection again to ensure that the size and the surface quality of the propeller shaft meet the requirements; and detecting the hardness of the laser deposited part to ensure that the hardness of the propeller shaft after laser deposition meets the requirement.
2. The laser repairing method for the propeller shaft of claim 1, wherein in the step C, the adopted alloy powder comprises the following components in percentage by weight: 0.008% to 0.018%, Cr: 15 to 20%, Si: 0.2 to 0.6%, Mo: 2 to 3%, Mn: 0.5 to 1%, Ni: 10 to 13 percent, and the balance of Fe.
3. The laser repair method for propeller shafts according to claim 1 or 2, wherein in the step D, the laser power of the fiber laser is 1600W to 2100W, and the elevation is 300mm to 325 mm.
4. The laser repairing method for propeller shaft of claim 3, wherein in said step D, the spot size of the fiber laser is 4mm x 4mm, the scanning speed is 600mm/min to 1000mm/min, and the lapping amount is 2 mm.
5. The laser repair method for propeller shafts of claim 3 wherein the inert gas in step E is argon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911286693.4A CN112981389A (en) | 2019-12-14 | 2019-12-14 | Laser repair method for propeller shaft |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911286693.4A CN112981389A (en) | 2019-12-14 | 2019-12-14 | Laser repair method for propeller shaft |
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| CN112981389A true CN112981389A (en) | 2021-06-18 |
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| CN201911286693.4A Pending CN112981389A (en) | 2019-12-14 | 2019-12-14 | Laser repair method for propeller shaft |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114032540A (en) * | 2021-10-27 | 2022-02-11 | 镇江同舟螺旋桨有限公司 | Propeller surface strength reinforcing process based on laser cladding |
| CN117448811A (en) * | 2023-11-08 | 2024-01-26 | 山东镭研激光科技有限公司 | Laser cladding repair process for spiral shaft in food industry |
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| CN103451650A (en) * | 2013-10-08 | 2013-12-18 | 岳阳大陆激光技术有限公司 | Laser quick repair process method for large rotary machine bearing bush |
| CN105297009A (en) * | 2015-11-26 | 2016-02-03 | 宋禹辰 | Laser-cladding repairing process for centering roller |
| CN105543838A (en) * | 2015-12-25 | 2016-05-04 | 燕山大学 | Remanufacturing method for marine crankshaft |
| AU2016101921A4 (en) * | 2015-11-15 | 2016-11-24 | Shandong Energy Heavy Equipment Group Dazu Remanufacturing Co., Ltd. | A method for cladding an inner hold of an upright cylinder |
| CN108588705A (en) * | 2018-04-17 | 2018-09-28 | 昆山鑫昌泰模具科技有限公司 | Nitrogenize the renovation technique of workpiece |
| CN110257826A (en) * | 2019-07-19 | 2019-09-20 | 燕山大学 | Grain roll bearing position laser cladding method and laser melting coating alloy powder |
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2019
- 2019-12-14 CN CN201911286693.4A patent/CN112981389A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011214541A (en) * | 2010-04-01 | 2011-10-27 | Toshiba Ge Turbine Service Kk | Method of repairing turbine blade and repaired turbine blade |
| CN103451650A (en) * | 2013-10-08 | 2013-12-18 | 岳阳大陆激光技术有限公司 | Laser quick repair process method for large rotary machine bearing bush |
| AU2016101921A4 (en) * | 2015-11-15 | 2016-11-24 | Shandong Energy Heavy Equipment Group Dazu Remanufacturing Co., Ltd. | A method for cladding an inner hold of an upright cylinder |
| CN105297009A (en) * | 2015-11-26 | 2016-02-03 | 宋禹辰 | Laser-cladding repairing process for centering roller |
| CN105543838A (en) * | 2015-12-25 | 2016-05-04 | 燕山大学 | Remanufacturing method for marine crankshaft |
| CN108588705A (en) * | 2018-04-17 | 2018-09-28 | 昆山鑫昌泰模具科技有限公司 | Nitrogenize the renovation technique of workpiece |
| CN110257826A (en) * | 2019-07-19 | 2019-09-20 | 燕山大学 | Grain roll bearing position laser cladding method and laser melting coating alloy powder |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114032540A (en) * | 2021-10-27 | 2022-02-11 | 镇江同舟螺旋桨有限公司 | Propeller surface strength reinforcing process based on laser cladding |
| CN117448811A (en) * | 2023-11-08 | 2024-01-26 | 山东镭研激光科技有限公司 | Laser cladding repair process for spiral shaft in food industry |
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Application publication date: 20210618 |