CN105695984B - A kind of surface repairing method of Al Zn Mg Cu alloy sheets - Google Patents
A kind of surface repairing method of Al Zn Mg Cu alloy sheets Download PDFInfo
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- CN105695984B CN105695984B CN201610069214.3A CN201610069214A CN105695984B CN 105695984 B CN105695984 B CN 105695984B CN 201610069214 A CN201610069214 A CN 201610069214A CN 105695984 B CN105695984 B CN 105695984B
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- alloy
- laser cladding
- alloy plate
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- prescan
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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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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/10—Alloys based on aluminium with zinc as the next major constituent
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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)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
The invention discloses a kind of surface repairing method of Al Zn Mg Cu alloy sheets; four steps are processed including grinding process, the pre-heat treatment, laser cladding and alloy sheets; wherein; laser cladding is that the surface of Al Zn Mg Cu alloy sheets is repaired under argon gas protection, and alloy powder composition used in laser cladding is Cu：1.50 2.50%, Mg：2.50 3.50%, Zr：0.26 0.33%, Zn：6.0 8.50%, Sc：0.26 0.32%, Al：Surplus.The present invention is simple to operate, and repair layer hardness is high, and repair layer forms good metallurgical binding with matrix, will not cause to come off；It is small to matrix heat affected area and transition region crystal grain is tiny, part thermal deformation will not be caused；Through laser dust the Al Zn Mg Cu alloy components of reparation quality and qualification rate it is high, transition region can be reduced and produce stomata and tissue looseness.
Description
Technical field
The invention belongs to fatigue crack recovery technique field, more particularly relates to a kind of table of Al-Zn-Mg-Cu alloy plate
Surface repair method.
Background technology
Covering is made up of Al-Zn-Mg-Cu alloy plate on the wing of part aircraft, and wing covers after long service on wing
Easily there is etch pit under stress and corrosive environment compound action in skin, and this is by the generation and extension of the crackle that accelerates fatigue.This is aluminium
Alloy has the tendency of to generate weld crack when using REPAIR WELDING, to stress concentration and stress sensitive, and most serial alloy weldings
It is bad to connect performance.If using spraying method reparation, its surface pit and micro-crack repair difficulty；Using in general laser cladding
Repair, the peak value of each pulse is very high during reparation, very high power density is produced in matrix surface moment, and make base
Body and benefit material moment melt and cooling.Air burst can be produced around molten bath in this process and cause molten bath splash.Splash
Metal many metal ball bodies are formed around molten bath, these spheroids can be formed in secondary cladding in cladding layer core, folder
Slag.Currently without suitable restorative procedure, workpiece can only be changed.
The content of the invention
It is existing to solve it is an object of the invention to provide a kind of surface repairing method of Al-Zn-Mg-Cu alloy plate
The problem of technology is not easy to carry out Al-Zn-Mg-Cu alloy plate surface defect repair.
The present invention is achieved in that a kind of surface repairing method of Al-Zn-Mg-Cu alloy plate, comprises the following steps：
Step 1, grinding process：Grinding process is carried out to the face crack area of Al-Zn-Mg-Cu alloy plate, cracks are rotten
Product is lost to remove；
Step 2, the pre-heat treatment：The surface of Al-Zn-Mg-Cu alloy plate is preheated；
Step 3, laser cladding：Repaired under argon gas protection using laser cladding mode, used by laser cladding
Alloy powder composition is Cu：1.50-2.50%, Mg：2.50-3.50%, Zr：0.26-0.33%, Zn：6.0-8.50%, Sc：
0.26-0.32%, Al：Surplus；
Step 4, alloy sheets processing：Al-Zn-Mg-Cu alloy plate after laser cladding processing is machined, polished
To required dimensions and roughness requirements.
The features of the present invention also resides in, and is that Sanding Area is carried out using laser when carrying out the pre-heat treatment in step 2
Prescan, nozzle-end is 21mm away from Sanding Area surface distance during scanning, 650-750mm/ points of sweep speed, when Sanding Area area
S is less than 3000mm2, prescan 3 times；Work as 3000mm2≤ S ＜ 5000mm2When, prescan 6 times；Work as 5000mm2≤S≤8000mm2
When, prescan 10 times.
The features of the present invention also resides in, and in step 3, the power of laser cladding is 850KW, and argon flow amount Q is 8L/min,
Oxygen content during deposition in gas is less than 50ppm, powder feed rate 26g/min, and nozzle-end is away from Sanding Area surface during scanning
Initial distance be 21mm, 650-750mm/ points of sweep speed, the nozzle rate of climb be 1.2mm/ layers, the material height of deposition filling
Go out alloy sheets desired size 0.3-0.5mm.
Beneficial effects of the present invention are as follows：
The present invention is simple to operate, and repair layer hardness is high, and repair layer forms good metallurgical binding with matrix, will not cause to take off
Fall；It is small to matrix heat affected area, part thermal deformation will not be caused；Dusted the Al-Zn-Mg-Cu alloy part of reparation through laser
Quality and qualification rate are high, while can reduce transition region and produce stomata and tissue looseness.
Brief description of the drawings
Fig. 1 is a kind of surface repairing method schematic flow sheet of Al-Zn-Mg-Cu alloy plate provided in an embodiment of the present invention；
Fig. 2 is the running route figure of nozzle in the embodiment of the present invention；
Fig. 3 is the hardness number result figure of different zones after workpiece reparation in inventive embodiments；
Fig. 4 is the metallographic structure after the embodiment of the present invention is repaired.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
The surface reconditioning side for showing a kind of Al-Zn-Mg-Cu alloy plate provided in an embodiment of the present invention exemplary Fig. 1
Method schematic flow sheet, the surface fatigue that this method may at least apply for Al-Zn-Mg-Cu alloy plate used in covering on wing are split
The reparation of line.
A kind of surface repairing method of Al-Zn-Mg-Cu alloy plate provided in an embodiment of the present invention, including it is grinding process, pre-
Heat treatment, laser cladding and alloy sheets process four steps.It is comprised the following steps that：
Step 101, the face crack area to Al-Zn-Mg-Cu alloy plate carry out grinding process, by cracks corrosion product
Remove；
Step 102, the surface to Al-Zn-Mg-Cu alloy plate preheat；
Step 103, repaired under argon gas protection using laser cladding mode, alloy powder used by laser cladding
Composition is Cu：1.50-2.50%, Mg：2.50-3.50%, Zr：0.26-0.33%, Zn：6.0-8.50%, Sc：0.26-
0.32%th, Al：Surplus；
Step 104, the Al-Zn-Mg-Cu alloy plate after laser cladding processing is machined, be polished to required
Dimensions and roughness requirements.
In embodiments of the present invention, in a step 102, it is that Sanding Area is carried out using laser when carrying out the pre-heat treatment
Prescan, nozzle-end is 21mm away from Sanding Area surface distance during scanning, 650-750mm/ points of sweep speed, when Sanding Area area
S is less than 3000mm2, prescan 3 times；Work as 3000mm2≤ S ＜ 5000mm2When, prescan 6 times；Work as 5000mm2≤S≤8000mm2
When, prescan 10 times.
In embodiments of the present invention, in step 103, the power of laser cladding is 850KW, and argon flow amount Q is 8L/min,
Oxygen content during deposition in gas is less than 50ppm, powder feed rate 26g/min, and nozzle-end is away from Sanding Area surface during scanning
Initial distance be 21mm, 650-750mm/ points of sweep speed, the nozzle rate of climb be 1.2mm/ layers, the material height of deposition filling
Go out alloy sheets desired size 0.3-0.5mm.
The surface repairing method of Al-Zn-Mg-Cu alloy plate provided in an embodiment of the present invention, simple to operate, repair layer hardness
Height, repair layer form good metallurgical binding with matrix, will not cause to come off；It is small to matrix heat affected area, part will not be caused
Thermal deformation；Through laser dust the Al-Zn-Mg-Cu alloy part of reparation quality and qualification rate it is high, while transition can be reduced
Area produces stomata and tissue looseness.
Embodiment 1
In embodiments of the present invention, the object to be repaired is one kind of covering on wing, and its material is one of which Al-
Zn-Mg-Cu alloy sheets, main alloy element content are：Cu：1.90%th, Mg：2.50%th, Cr：0.18%th, Zn：5.80%th, Ti：
0.20%th, Al：Surplus, thickness 10mm；There are the visible pit of naked eyes, fatigue statistic in its surface.
The surface repairing method of a kind of Al-Zn-Mg-Cu alloy plate provided in an embodiment of the present invention, specifically according to following step
It is rapid to carry out：
Step 1, grinding process is carried out to the face crack area of Al-Zn-Mg-Cu alloy plate, cracks corrosion product is clear
Remove；In embodiments of the present invention, it is to clear up crackle circumferential surface coating using electric grinder first, then will using angle grinder
Cracks and pit internal corrosion product are removed, and cracked zone is polished into the rectangle of rule, and the depth of Sanding Area, which is more than, to be split
Line depth.
Step 2, the surface of Al-Zn-Mg-Cu alloy plate is preheated：Nozzle operation is designed according to the shape of Sanding Area
Route, run laser according to designed nozzle running route and prescan is carried out to Sanding Area to reach pre-heat effect；Scanning
When nozzle-end away from Sanding Area surface distance be 21mm, 650-750mm/ points of sweep speed, when Sanding Area, area S is less than
3000mm2, prescan 3 times, work as 3000mm2≤ S ＜ 5000mm2When, prescan 6 times；Work as 5000mm2≤S≤8000mm2When, in advance
Scanning 10 times.
Step 3, repaired under argon gas protection using laser cladding mode, used by laser cladding the unanimous powder of conjunction into
It is divided into Cu：2.20%th, Mg：3.10%th, Zr：0.31%th, Zn：6.30%th, Sc：0.30%th, Al：Surplus；Using above-mentioned quality point
Array into alloy powder deposition after, for deposition area Cu, Mg, Zn content close to the composition for being repaired material, Zr and Sc elements can
To refine deposition area crystal grain, and then play invigoration effect.The power of laser cladding is 850KW, and argon flow amount Q is 8L/min, is melted
Oxygen content during applying in gas is less than 50ppm, powder feed rate 26g/min, and nozzle-end is away from Sanding Area surface during scanning
Initial distance is 21mm, and 650-750mm/ points of sweep speed, the nozzle rate of climb is 1.2mm/ layers, and the material of deposition filling is higher by
Alloy sheets desired size 0.3-0.5mm.
Step 4, the Al-Zn-Mg-Cu alloy plate after laser cladding processing is machined, required by being polished to
Dimensions and roughness requirements.
In embodiments of the present invention, when carrying out the laser cladding of step 1, the setting of nozzle operating path is as shown in Fig. 2 figure
Line a, b, c in 2 are nozzle running route, and line d is the border of Sanding Area；L1 is nozzle running route a line space, and its value is
1.5mm；Distances of the L2 between line c and line a, its value are 0.75mm；L3 is line c and repairs the distance between area border, and its value is
0.75mm；The running route of nozzle should be able to cover whole Sanding Area.
Al-Zn-Mg-Cu alloy plate is repaired according to the method described above, the testing result of reparation is as follows：
A) after workpiece is placed 1 day after repairing and placed 60 days, 0.3mm under mother metal, transition region and reparation area surface and surface
The hardness number at place is as shown in Figure 3.As can be drawn from Figure 3, the hardness for placing 1 Tian Hou surface reconditionings area declines about compared with mother metal
15.1%, decline about 13% under surface at 0.3mm；Case hardness declines about 12.6% after placing 60 days, and 0.3mm places are firmly under surface
Degree declines about 7.3%.
B) metallographic structure analysis result such as Fig. 4, the results showed that repair layer forms good metallurgical binding, Bu Huizao with mother metal
Into coming off, and transition region crystal grain is tiny.
C) it is intact through X-ray examination, no abnormality seen, quality；
D) electrical conductivity test is carried out after being placed 60 days to the test block using same process reparation, different parts carry out 6 respectively
Secondary test, the electrical conductivity of different zones are shown in Table 1.
The different zones electrical conductivity (%IACS) of table 1
It can draw from the result of table 1, after the Al-Zn-Mg-Cu alloy plate repaired using the present invention is placed 60 days, repair
The electrical conductivity of area and transition region is closer to mother metal area, wherein the electrical conductivity for repairing area is slightly above mother metal, transition region electrical conductivity is omited
Less than mother metal.
Embodiment 2
In embodiments of the present invention, the object to be repaired is one kind of covering on wing, and its material is one of which Al-
Zn-Mg-Cu alloy sheets, main alloy element content are：Cu：1.89%；Mg：1.9%th, Zr：0.11%th, Zn：5.8%th, Al：It is remaining
Amount, thickness 10mm；There are the visible pit of naked eyes, fatigue statistic in its surface.Its surface repairing method with embodiment 1, unlike
Alloy powder composition is Cu used by laser cladding：2.34%th, Mg：2.63%th, Zr：0.32%th, Zn：7.50%th, Sc：
0.26%th, Al：Surplus.
Embodiment 3
In embodiments of the present invention, the object to be repaired is one kind of covering on wing, and its material is one of which Al-
Zn-Mg-Cu alloy sheets, main alloy element content are：Cu：2.04%；Mg：2.15%th, Zr：0.12%th, Zn：6.33%th, Al：
Surplus, thickness 10mm；There are the visible pit of naked eyes, fatigue statistic in its surface.Its surface repairing method is different with embodiment 1
It is that alloy powder composition is Cu used by laser cladding：2.43%th, Mg：3.45%th, Zr：0.27%th, Zn：8.21%th, Sc：
0.29%th, Al：Surplus.
Embodiment 4
In embodiments of the present invention, the object to be repaired is one kind of covering on wing, and its material is one of which Al-
Zn-Mg-Cu alloy sheets, main alloy element content are：Cu：1.18%；Mg：2.84%th, Zr：0.06%th, Zn：8.1%th, Al：
Surplus, thickness 10mm；There are the visible pit of naked eyes, fatigue statistic in its surface.Its surface repairing method is different with embodiment 1
It is that alloy powder composition is Cu used by laser cladding：1.62%th, Mg：2.81%th, Zr：0.28%th, Zn：8.46%th, Sc：
0.32%th, Al：Surplus.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know basic creation
Property concept, then can make other change and modification to these embodiments.So appended claims be intended to be construed to include it is excellent
Select embodiment and fall into having altered and changing for the scope of the invention.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (3)
1. a kind of surface repairing method of Al-Zn-Mg-Cu alloy plate, it is characterised in that comprise the following steps：
Step 1, grinding process：Grinding process is carried out to the face crack area of Al-Zn-Mg-Cu alloy plate, cracks are corroded and produced
Thing is removed；
Step 2, the pre-heat treatment：The surface of Al-Zn-Mg-Cu alloy plate is preheated；
Step 3, laser cladding：Repaired under argon gas protection using laser cladding mode, alloy used by laser cladding
Powdered ingredients are Cu：1.50-2.50%, Mg：2.50-3.50%, Zr：0.26-0.33%, Zn：6.0-8.50%, Sc：0.26-
0.32%th, Al：Surplus；
Step 4, alloy sheets processing：Al-Zn-Mg-Cu alloy plate after laser cladding processing is machined, is polished to institute
It is required that dimensions and roughness requirements.
2. a kind of surface repairing method of Al-Zn-Mg-Cu alloy plate as claimed in claim 1, it is characterised in that in step 2
In, it is to carry out prescan to Sanding Area using laser when carrying out the pre-heat treatment, nozzle-end is away from Sanding Area surface during scanning
Distance is 21mm, and sweep speed 650-750mm/ divides, when Sanding Area area S is less than 3000mm2, prescan 3 times；Work as 3000mm2≤
S ＜ 5000mm2When, prescan 6 times；Work as 5000mm2≤S≤8000mm2When, prescan 10 times.
3. a kind of surface repairing method of Al-Zn-Mg-Cu alloy plate as claimed in claim 1, it is characterised in that in step 3
In, the power of laser cladding is 850KW, and argon flow amount Q is 8L/min, and the oxygen content during deposition in gas is less than 50ppm,
Powder feed rate 26g/min, initial distance of the nozzle-end away from Sanding Area surface is 21mm, sweep speed 650-750mm/ during scanning
Point, the nozzle rate of climb is 1.2mm/ layers, and the material of deposition filling is higher by alloy sheets desired size 0.3-0.5mm.
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| CN201610069214.3A CN105695984B (en) | 2016-01-27 | 2016-01-27 | A kind of surface repairing method of Al Zn Mg Cu alloy sheets |
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| CN201610069214.3A CN105695984B (en) | 2016-01-27 | 2016-01-27 | A kind of surface repairing method of Al Zn Mg Cu alloy sheets |
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| CN105695984B true CN105695984B (en) | 2018-02-09 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107058827A (en) * | 2017-06-27 | 2017-08-18 | 桂林理工大学 | Al Zn Mg Cu Sc Zr sheet alloys with excellent mechanical performance and preparation method thereof |
| CN109967878A (en) * | 2017-12-27 | 2019-07-05 | 中国科学院宁波材料技术与工程研究所 | Laser crack forming mechanism system and laser method for repairing crack |
| CN114481118B (en) * | 2021-12-16 | 2023-11-10 | 中车工业研究院有限公司 | Method for repairing aluminum alloy by laser cladding in atmospheric environment |
| CN117660824B (en) * | 2024-02-01 | 2024-04-02 | 内蒙古工业大学 | NiCrLaCdZrC powder-based laser alloy, composite coating and preparation method of composite coating |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010279982A (en) * | 2009-06-05 | 2010-12-16 | Sumitomo Light Metal Ind Ltd | Al ALLOY FILLER METAL |
| CN104785950A (en) * | 2015-04-15 | 2015-07-22 | 北京工业大学 | Al-Mg-Sc welding wire for aluminum alloy laser welding |
-
2016
- 2016-01-27 CN CN201610069214.3A patent/CN105695984B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010279982A (en) * | 2009-06-05 | 2010-12-16 | Sumitomo Light Metal Ind Ltd | Al ALLOY FILLER METAL |
| CN104785950A (en) * | 2015-04-15 | 2015-07-22 | 北京工业大学 | Al-Mg-Sc welding wire for aluminum alloy laser welding |
Non-Patent Citations (1)
| Title |
|---|
| 铝合金的激光熔覆修复;郭永利等;《中国激光》;20080228;第35卷(第2期);第304-306页 * |
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