CN105887079A - Method for fast and emergently repairing failure parts through laser forming in field environment - Google Patents
Method for fast and emergently repairing failure parts through laser forming in field environment Download PDFInfo
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- CN105887079A CN105887079A CN201610236568.2A CN201610236568A CN105887079A CN 105887079 A CN105887079 A CN 105887079A CN 201610236568 A CN201610236568 A CN 201610236568A CN 105887079 A CN105887079 A CN 105887079A
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- repaired
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- inefficacy
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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
-
- 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
Abstract
The invention discloses a method for fast and emergently repairing failure parts through laser forming in the field environment. Self-fluxing powdered alloy good in oxidation resistance is adopted, in the field environment without inert gas shielding in the air, nitrogen gas is separated from the air by a nitrogen gas generator and serves as powder-loading gas, and then the failure parts subjected to abrasion or breakage are fast and emergently repaired through laser forming; a three-dimension scanning device scans the failure parts and carries out matching operation with a database theory model for obtaining defect models of the failure parts, and the failure parts are repaired layer by layer according to the defect models through the optimized parameters of the laser forming and repairing technology; the repaired parts are machined, and then the physical dimensions of the parts are recovered. According to the laser forming technology, the problem that contingencies of part failures occur in the hostile field environment such as ocean navigation, emergency rescue and disaster relief and equipment overhaul, but the distance to a supply station is long and fast and emergent repair cannot be realized in time can be solved.
Description
Technical field
The present invention relates to Laser forming repair technology, particularly to laser forming quick lash-up recovering inefficacy part under a kind of wild environment
Method.
Background technology
Under the field rugged environments such as off-lying sea navigation, rescue and relief work, easily there is wear out failure, tired in long-time military service in equipment part
The failure modes such as labor ruptures, overload breakage, if without replacement part, or from charging point farther out, will affect the properly functioning of equipment,
If able to repair these parts rapidly in time, make equipment investment normally use, can economize on resources, reduce economic loss, tool
Huge engineer applied is had to be worth and strategic importance.
Increase material manufacture and overturned traditional manufacturing technology, be the advanced manufacture of the multi-crossed disciplines such as a kind of integrating materials, information, manufacture
Technology, becomes study hotspot both domestic and external at present.Laser forming technology combines rapid prototyping and laser melting and coating technique, is not using cutter
In the case of tool and mould, shape high-performance, complete fine and close, there is the metal parts of labyrinth, be widely used in Aero-Space,
The fields such as biologic medical, part maintenance.Comparing with welding method recovery technique with traditional galvanoplastic, hot spray process, laser forming has
Having quickly heating, the quickly feature of cooling, have heat input little, heat affected area is little, is difficult to damaging substrate, cladding layer and matrix
Between reach metallurgical binding, bond strength advantages of higher, it is thus achieved that be increasingly widely applied, the reparation for inefficacy part opens newly
Approach.
Summary of the invention
It is an object of the invention to overcome above-mentioned prior art not enough, it is provided that under a kind of wild environment, the quick lash-up recovering of laser forming loses
The method of effect part, for equipping under the wild environments such as off-lying sea navigation, rescue and relief work, overhaul of the equipments after part is on active service for a long time easily to go out
Existing wear out failure, fatigue fracture, overload such as fractures at the failure mode, if will affect the properly functioning of equipment without replacement part.The present invention
Part after reparation returns to the physical dimension requirement of former part, and intensity and plasticity reach more than the 80% of mother metal.
For reaching object above, the present invention adopts the following technical scheme that and is achieved:
Under a kind of wild environment, the method for laser forming quick lash-up recovering inefficacy part, comprises the steps:
(1) piece surface to be repaired is carried out grinding process, remove oxide and the greasy dirt on surface；
(2) inefficacy part is easily installed, dismantles, and is fixed on laser forming workbench by part to be repaired, uses three-dimensional to sweep
Imaging apparatus gathers defect model, carries out right with theoretical model, obtains defect model to be repaired；
When inefficacy part is not easy to dismounting, inefficacy part is repaired online, uses three-dimensional scanner to gather defect model,
Carry out right with theoretical model, obtain defect model to be repaired；
(3) optical fiber laser of 500W, nitrogen gas generator separation of nitrogen sending as laser forming and reparation from air is used
Powder source of the gas.According to part failure type, corresponding alloy powder is selected to select anti-as repair materials, abrasion class part repair materials
The Fe901 powder that oxidisability is good, hardness is high, wearability is good；Tired or overload breakage class part selects hardness plasticity moderate, strong good
Fe314 alloy powder.
(4) defect model is carried out layered shaping, select the technological parameter optimized, from the beginning of the minimum point of defect model, successively
Carry out Laser forming repair, repair, after terminating, reparation position is carried out surface process, recover the physical dimension of part；
(5) part repaired is machined out into national standard tensile sample, the mechanical property of part, bag after test reparation
Include intensity and plasticity；
(6) part repaired is carried out line cutting, inlays, grind, polish, corrode sample preparation, under digit optical microscope
Observe the bonding state of cladding layer and mother metal, in metallurgical binding between cladding layer and mother metal, without slag inclusion, pore and crackle at faying face,
Intensity and plasticity reach more than the 80% of mother metal, then part reparation is qualified.
Scanning the defect model precision obtained in such scheme is ± 0.05mm, and renovation technique parameter is laser power 150～250W,
Scanning speed 10～20mm/s, powder sending quantity is 4.0～8.0g/min, and overlap joint spacing is 0.20～0.40mm, successively enters by defect model
Row is repaired.
With emery wheel, piece surface to be repaired is carried out sanding and polishing process, remove oxide and the greasy dirt on surface.
Use portable three-dimensional scanner, scan part to be repaired, by with the theoretical model in data base to computing,
Obtaining defect model to be repaired, scanning accuracy is ± 0.05mm.
It is difficult to carry out Laser forming repair under wild environment under the atmosphere of inert gas shielding, uses the alloyed powder that non-oxidizability is good
End is as repair materials, in air non-protected environment, uses nitrogen to replace argon, by nitrogen gas generator separating nitrogen from air
Gas is as carrying powder source of the gas, and its purity is adjustable, and nitrogen fraction is 98.0～99.9%.
Described repair materials refers to the Fe901 that class part repair materials selects good in oxidation resistance, hardness height, wearability is good that weares and teares
Powder, the Fe314 alloy powder that hardness plasticity moderate, strong is good selected by tired or overload breakage class part.
Described renovation technique parameter is laser power 150～250W, scanning speed 10～20mm/s, and powder sending quantity is 4.0～8.0g/min,
Overlap joint spacing is 0.20～0.40mm, successively repairs by defect model.
Described electronic universal material testing machine model is Istron5985, the model of microhardness testers is
HXD-2000TMSC/LCD, digit optical microscope model are KEYENCE VH-8000.
The present invention is directed to laser forming quick lash-up recovering inefficacy part under the wild environments such as off-lying sea navigation, rescue and relief work, overhaul of the equipments.
Wild environment is different from traditional laboratory, it is impossible to carry out Laser forming repair in the environment of inert gas shielding, so using anti-
Oxidisability is good, self-fluxing alloyed powder Fe901 and Fe314 containing Si, B deoxidation slag making element be as repair materials.Use system
Nitrogen purity be 98.0～99.5% nitrogen gas generator from air separation of nitrogen as the load powder source of the gas needed for laser forming, not only gas
Body purity meets the performance requirement after reparation, and avoids carrying around many gas cylinders, alleviates weight of equipment, economical convenient.
Accompanying drawing explanation
Fig. 1 is laser maintaining formation system schematic diagram.
In figure: 1, lens；2, digital control platform；3, molten bath；4, carrier gas powder；5, laser beam；6, coaxial powder-feeding nozzle.
Fig. 2 is that laser forming Fe314 repairs part cladding layer and matrix metallographic pattern photo.
Fig. 2 (a) is that Fe314 repairs faying face macro morphology figure；
Fig. 2 (b) is that Fe314 repairs faying face microscopic appearance figure.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in further detail.
With reference to shown in Fig. 1, portable laser of the present invention maintenance formation system includes Database Systems, 3 D scanning system, swashs
Photo-shaping system and machining system.Database Systems store the theoretical model of each type component；3 D scanning system is treated for scanning
The inefficacy part repaired, carries out to computing, obtaining defect model to be repaired with data base theory model；Laser forming system bag
Include the devices such as laser instrument, coaxial powder feeding system, industrial computer and nitrogen gas generator, wherein laser instrument produce energy provided by laser source, with
Axle powder feed system conveying alloy powder, industrial computer control the relative motion of equipment, nitrogen gas generator provides to shape and repairs source of the gas.It is special
Levy and be: select self-fluxing alloyed powder Fe901 and Fe314, in atmosphere under the conditions of the wild environment of inert free gas protection,
Nitrogen gas generator separation of nitrogen from air is used as carrying powder gas, the inefficacy parts such as abrasion class and fracture class to be carried out laser forming fast
Speed lash-up recovering.
Laser forming quick lash-up recovering overload breakage equipment gear under accompanying examples-wild environment.
1, Laser forming repair 40Cr steel alloy gear, selects self-fluxing alloyed powder Fe314, and powder size is 45～100 μm,
Containing Si, B nonmetalloid, good in oxidation resistance, hardness plasticity moderate, strong is good, it is adaptable to shapes under wild environment and repairs.
2, Fe314 powder is placed in vacuum drying oven it is heated to 200 DEG C, be incubated 4h, to remove moisture removal and powder stream can be strengthened
Dynamic property；After gear surface grinder buffing to be repaired, with ethanol purge, remove surface oxide layer and greasy dirt.
3, the nitrogen purity processed adjusting nitrogen gas generator is 99.0%, flow is 8L/min, carries powder source of the gas for shaping to repair to provide；Logical
Cross three-dimensional scanner and scan gear to be repaired, with data base theory model to computing, obtain the geometric model of defect, lead
Enter in laser forming industrial computer.
4, shaping repair process and use filling scan mode, the most first sweep exterior contour and be subsequently filled inside, main technologic parameters is sharp
Luminous power 180～200W, scanning speed 10～15mm/s, powder sending quantity is 4.5g/min, and overlap joint spacing is 0.25mm, by defect
Model is successively repaired.
5, carry out line cutting, inlay, roughly grind, fine grinding, polish, corrode repairing gear, be finally KEYENCE in model
The bonding state of cladding layer and parent is observed under VH-8000 digit optical microscope；The part repaired is machined out into country
Standard tensile specimen, the mechanical property of part after test reparation.
Reparation result shows: Laser forming repair gear part under wild environment, has recovered the physical dimension of the form of gear tooth；Cladding
Layer and parent are metallurgical binding, without defects such as slag inclusion, pore, crackles at faying face, see Fig. 2 (a) and (b)；Laser forming
After reparation, the intensity of part exceedes parent, reaches the 106% of parent, and plasticity and parent are close, reach the 89% of parent, are shown in Table-1.
Table-1 Laser forming repair gear part normal tensile property
Claims (7)
1. a method for laser forming quick lash-up recovering inefficacy part under wild environment, shapes system including portable laser maintenance
System, portable laser maintenance formation system includes Database Systems, 3 D scanning system, laser forming system and machining system,
It is characterized in that: select self-fluxing alloyed powder Fe901 and Fe314, in atmosphere the wild environment condition of inert free gas protection
Under, use nitrogen gas generator separation of nitrogen from air as carrying powder gas, with the inefficacy parts such as class that rupture, abrasion class to be carried out laser and becomes
The quick lash-up recovering of shape, comprises the steps:
(1) piece surface to be repaired is carried out sanding and polishing process, remove oxide and the greasy dirt on surface；
(2) inefficacy part is readily accessible, is fixed on laser forming workbench by part to be repaired, uses three-dimensional scanner to adopt
Collection defect model, carries out right with theoretical model in data base, obtains defect model to be repaired；
When inefficacy part is not easy to dismounting, inefficacy part is repaired online, uses three-dimensional scanner to gather defect model,
Carry out right with theoretical model in data base, obtain defect model to be repaired；
(3) use the optical fiber laser of 500W, nitrogen gas generator from air separation of nitrogen as laser forming and the load of reparation
Powder source of the gas, according to part failure type, select alloy powder as repair materials；
(4) defect model is carried out layered shaping, select renovation technique parameter, successively carry out laser from the minimum point of defect model
Shape and repair, carry out surface process to repairing position, recover the physical dimension of inefficacy part；
(5) part repaired is machined out into national standard tensile sample, the mechanical property of part after test reparation, including
Intensity and plasticity；
(6) repaired part is carried out line cutting, inlays, grind, polish, corrode sample preparation, see under digit optical microscope
Examine the bonding state of cladding layer and mother metal；In metallurgical binding between cladding layer and mother metal, without slag inclusion, pore and crackle at faying face,
Intensity and plasticity reach more than the 80% of mother metal, then part reparation is qualified.
2. the method for laser forming quick lash-up recovering inefficacy part under wild environment as claimed in claim 1, it is characterised in that
With emery wheel, piece surface to be repaired is carried out sanding and polishing process, remove oxide and the greasy dirt on surface.
3. the method for laser forming quick lash-up recovering inefficacy part under wild environment as claimed in claim 1, it is characterised in that
Use portable three-dimensional scanner, scan part to be repaired, by with the theoretical model in data base to computing, obtain
Defect model to be repaired, scanning accuracy is ± 0.05mm.
4. the method for laser forming quick lash-up recovering inefficacy part under wild environment as claimed in claim 1, it is characterised in that
Being difficult to carry out Laser forming repair under wild environment under the atmosphere of inert gas shielding, the alloy powder using non-oxidizability good is made
For repair materials, in air non-protected environment, use nitrogen to replace argon, made by nitrogen gas generator separation of nitrogen from air
For carrying powder source of the gas, and its purity is adjustable, and nitrogen fraction is 98.0～99.9%.
5. the method for laser forming quick lash-up recovering inefficacy part under wild environment as claimed in claim 1, it is characterised in that
Described repair materials refers to the Fe901 powder that class part repair materials selects good in oxidation resistance, hardness height, wearability is good that weares and teares,
The Fe314 alloy powder that hardness plasticity moderate, strong is good selected by tired or overload breakage class part.
6. the method for laser forming quick lash-up recovering inefficacy part under wild environment as claimed in claim 1, it is characterised in that
Described renovation technique parameter is laser power 150～250W, scanning speed 10～20mm/s, and powder sending quantity is 4.0～8.0g/min,
Overlap joint spacing is 0.20～0.40mm, successively repairs by defect model.
7. the method for laser forming quick lash-up recovering inefficacy part under wild environment as claimed in claim 1, it is characterised in that
Described electronic universal material testing machine model is Istron5985, the model of microhardness testers is HXD-2000TMSC/LCD,
Digit optical microscope model is KEYENCE VH-8000.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610236568.2A CN105887079A (en) | 2016-04-15 | 2016-04-15 | Method for fast and emergently repairing failure parts through laser forming in field environment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610236568.2A CN105887079A (en) | 2016-04-15 | 2016-04-15 | Method for fast and emergently repairing failure parts through laser forming in field environment |
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| CN105887079A true CN105887079A (en) | 2016-08-24 |
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| CN201610236568.2A Pending CN105887079A (en) | 2016-04-15 | 2016-04-15 | Method for fast and emergently repairing failure parts through laser forming in field environment |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107150175A (en) * | 2017-07-13 | 2017-09-12 | 淮阴工学院 | Damage Gear by Laser dynamic cladding reparation and stress regulation and control system and method in real time |
| CN110952086A (en) * | 2019-12-11 | 2020-04-03 | 中铁工程装备集团有限公司 | On-line remanufacturing device and method for hob ring |
| CN111122448A (en) * | 2019-12-20 | 2020-05-08 | 东莞理工学院 | Additive manufacturing map type stress analysis 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 |
| CN113042738A (en) * | 2021-03-10 | 2021-06-29 | 岭澳核电有限公司 | Pump cover plate additive repairing method and system for circulating water filtering system |
| CN113927169A (en) * | 2021-11-22 | 2022-01-14 | 南京航空航天大学 | Device and method based on laser material increase field in-situ repair |
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| CN104674210A (en) * | 2013-12-02 | 2015-06-03 | 齐欢 | Workpiece laser automatic repair method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104674210A (en) * | 2013-12-02 | 2015-06-03 | 齐欢 | Workpiece laser automatic repair method |
Non-Patent Citations (2)
| Title |
|---|
| 张文龙等: "不同气氛下激光熔覆Fe901修复40Cr组织与性能的研究", 《电加工与模具》 * |
| 王细洋: "《现代制造技术》", 30 April 2010 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107150175A (en) * | 2017-07-13 | 2017-09-12 | 淮阴工学院 | Damage Gear by Laser dynamic cladding reparation and stress regulation and control system and method in real time |
| CN110952086A (en) * | 2019-12-11 | 2020-04-03 | 中铁工程装备集团有限公司 | On-line remanufacturing device and method for hob ring |
| CN110952086B (en) * | 2019-12-11 | 2022-03-04 | 中铁工程装备集团有限公司 | On-line remanufacturing device and method for hob ring |
| CN111122448A (en) * | 2019-12-20 | 2020-05-08 | 东莞理工学院 | Additive manufacturing map type stress analysis 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 |
| CN113042738A (en) * | 2021-03-10 | 2021-06-29 | 岭澳核电有限公司 | Pump cover plate additive repairing method and system for circulating water filtering system |
| CN113927169A (en) * | 2021-11-22 | 2022-01-14 | 南京航空航天大学 | Device and method based on laser material increase field in-situ repair |
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