CN104928617B - A kind of laser remolten method of offshore platform steel arc spraying aluminum coatings - Google Patents
A kind of laser remolten method of offshore platform steel arc spraying aluminum coatings Download PDFInfo
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- CN104928617B CN104928617B CN201510393588.6A CN201510393588A CN104928617B CN 104928617 B CN104928617 B CN 104928617B CN 201510393588 A CN201510393588 A CN 201510393588A CN 104928617 B CN104928617 B CN 104928617B
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- platform steel
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- 238000000576 coating method Methods 0.000 title claims abstract description 54
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 19
- 239000010959 steel Substances 0.000 title claims abstract description 19
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 18
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000005507 spraying Methods 0.000 title claims abstract description 17
- 239000011248 coating agent Substances 0.000 claims abstract description 45
- 239000000758 substrate Substances 0.000 claims abstract description 20
- 239000007921 spray Substances 0.000 claims abstract description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 9
- 238000010891 electric arc Methods 0.000 claims abstract description 8
- 239000011159 matrix material Substances 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 claims abstract description 4
- 229910052742 iron Inorganic materials 0.000 claims abstract description 4
- 238000004372 laser cladding Methods 0.000 claims abstract description 4
- 229910000838 Al alloy Inorganic materials 0.000 claims description 8
- 239000007789 gas Substances 0.000 claims description 8
- 239000004411 aluminium Substances 0.000 claims description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 238000005422 blasting Methods 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 238000005488 sandblasting Methods 0.000 claims description 3
- 244000137852 Petrea volubilis Species 0.000 claims description 2
- 230000003749 cleanliness Effects 0.000 claims description 2
- 238000005238 degreasing Methods 0.000 claims description 2
- 239000004519 grease Substances 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 abstract description 23
- 230000007797 corrosion Effects 0.000 abstract description 22
- 239000010410 layer Substances 0.000 abstract description 11
- 239000011247 coating layer Substances 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 5
- 239000013535 sea water Substances 0.000 abstract description 4
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 239000002131 composite material Substances 0.000 abstract description 2
- 238000012986 modification Methods 0.000 abstract description 2
- 230000004048 modification Effects 0.000 abstract description 2
- 150000003839 salts Chemical class 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000012876 topography Methods 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 229910052729 chemical element Inorganic materials 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000003897 fog Substances 0.000 description 1
- 239000003665 fog water Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000004626 scanning electron microscopy Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Abstract
The present invention relates to offshore platform steel surface modification technologies field, refer in particular to a kind of laser remolten method that offshore platform steel surface arcing sprays aluminized coating, to solve, not by increasing the problem of coating layer thickness improves coating anti-seawater corrosion ability, to belong to material surface modifying composite treatment technology.Patent of the present invention prepares one layer of aluminized coating by electric arc spraying process in offshore platform steel substrate surface, aluminized coating and surface of bottom material iron are melted by Laser Cladding again, Fe Al alloy-layers are formed after cooling, coating surface is smooth, structure property is improved, coating and matrix formation metallurgical binding, occur a small amount of amorphous aluminum in coating, and the Corrosion Protection of coating gets a promotion height.
Description
Technical field
The present invention relates to offshore platform steel surface modification technologies field, a kind of offshore platform steel surface electricity is refered in particular to
Arc sprays the laser remolten method of aluminized coating, to solve not improve the anti-seawater corrosion ability of coating by increasing coating layer thickness
Problem, belongs to material surface modifying composite treatment technology.
Background technology
Ocean platform is mainly used in offshore oil, gas extraction work, because oil-gas mining region is constantly to depth
Extra large regional development, ocean platform is by by more severe typhoon, wave, tide and salt fog, electrolyte, marine microorganism etc.
Physical-chemical is corroded；Especially in wave splash zone, the corrosion rate of steel is under normal circumstances 6 times, spud leg steel surface
A small amount of breakage can cause the generation for closing battery, it will accelerate its corrosion rate, and mobile ocean platform application to sea
The anticorrosion time limit of foreign platform has also been proposed new requirement；Arc spraying aluminium is a kind of long-acting metal surface anticorrosive technique,
Theoretical service life is 30 years to the aluminized coating of 200 μ m-thicks in the seawater, in the stronger Tidal zone environment of salt fog and seawater erosion,
Its service life is decreased obviously, and it will be influenced whether to extend the service life of ocean platform simply by increase coating layer thickness
The mechanical performance of load carrier；With the increase of coating thickness, the spraying such as coating void, hole defect can be dramatically increased；Its
Secondary, the combination of aluminized coating and ground is coexisted for a small amount of metallurgical binding with a large amount of mechanical bonds, and the increase of coating layer thickness can be led
Coating is caused overall peel off occur.
Patent of the present invention prepares one layer of aluminized coating by electric arc spraying process in offshore platform steel substrate surface, then passes through
Laser Cladding melts aluminized coating and surface of bottom material iron, and Fe-Al alloy layer is formed after cooling, and coating surface is smooth, tissue
Performance is improved, coating and matrix form in metallurgical binding, coating and a small amount of amorphous aluminum occur, and the Corrosion Protection of coating is obtained
It is high to lifting.
The content of the invention
Patent of the present invention is modified place using electric arc spraying-laser remolten combination process to offshore platform steel surface
Reason, by a series of physical that occurs between Fe elements and Al elements, chemically react steel surface prepare a layer thickness it is uniform,
Be well combined, the alloy coat of excellent anti-corrosion performance；The military service of coating can be increased under conditions of coating layer thickness is not increased
Life-span, so as to reduce influence of the coating weight to ocean platform mechanical property, it is not necessary to by heat diffusion treatment technique with regard to that can make
Coating is combined closely with matrix formation, is reached simplified technique, is reduced the purpose of cost, ocean platform can be made to obtain long-acting guarantor
Shield.
The present invention's comprises the following steps that：The face coat preparation side of offshore platform steel arc spraying aluminium-laser remolten
Method, it is characterised in that carry out mechanical grinding to substrate surface first, chemical liquids are cleaned to up to Sa3 grades of cleannes, blasting treatment；
Using industrial Ф 2mm aluminium wires as raw material, it is ensured that its purity ＞ 99.5%, aluminium wire is heated to molten state using the heat energy of electric arc, its
Operating voltage is 20-32V, and electric current is 150-300A, and using 0.5-0.6Mpa high pressure draught as power, molten aluminum is sprayed onto into base material
Surface, it is ensured that the translational speed of spray gun is 300-400mm/s, spray distance is to cool down 80min- after the completion of 5-8mm, spraying
100min, makes substrate surface cover the aluminized coating that a layer thickness is 200-250 μm, and coating forms good mechanical bond with matrix
With a small amount of metallurgical binding；Laser remolten PROCESS FOR TREATMENT is finally carried out, laser power is 1000-1200W, and spot diameter is 3-
4mm, sweep speed is 6-8mm/s, and is filled with argon gas as protection gas, to ensure whole aluminized coatings and substrate surface thickness
Molten condition can be entered at 30-50 μm, fully reaction forms the Fe-Al alloy layer that thickness is 100-150 μm, makes matrix
Turn into an entirety with coating.
Brief description of the drawings
Fig. 1 is the surface topography comparison diagram before and after present invention corrosion；(a) after reset condition (b) corrosion.
Fig. 2 is the interface topography comparison diagram before and after present invention corrosion；(a) after reset condition (b) corrosion.
Fig. 3 is the XRD comparison diagrams before and after present invention corrosion；(a) after reset condition (b) corrosion.
Embodiment
(1) 180 are used#-1000#Sand paper is polished substrate surface, with washes of absolute alcohol, acetone degreasing, to remove
Specimen surface grease and debris, it is ensured that substrate surface cleanliness reaches Sa3 grades.
(2) the use of particle diameter is that 1mm iron-sands are abrasive particle, compressed air pressure ＞ 0.8MPa, sandblasting distance is 200mm, spray
Sand angle is 20 °, smart rugosity is reached RZ60 μm.
(3) using industrial Ф 2mm aluminium wires as raw material, it is ensured that its purity ＞ 99.5%, aluminium wire is heated using the heat energy of electric arc
To molten state, its operating voltage is 20-32V, and electric current is 150-300A, using 0.5-0.6Mpa high pressure draught as power, will be molten
Molten aluminum is sprayed onto substrate surface, it is ensured that the translational speed of spray gun is 300-400mm/s, and spray distance is 5-8mm, cold after the completion of spraying
But 80min-100min, makes substrate surface cover the aluminized coating that a layer thickness is 200-250 μm, and coating forms good with matrix
Mechanical bond and a small amount of metallurgical binding.
(4) laser remolten PROCESS FOR TREATMENT is finally carried out, laser power is 1000-1200W, and spot diameter is 3-4mm, scanning
Speed is 6-8mm/s, and is filled with argon gas as protection gas, to ensure at 30-50 μm of whole aluminized coatings and substrate surface thickness
Molten condition can be entered, fully reaction forms the Fe-Al alloy layer that thickness is 100-150 μm.
(5) Corrosion Protection of the coating is verified by salt spray corrosion test, concentration is used for 5% NaCl solution, spraying
Pressure is 0.1MPa, and test temperature is 35 ± 2 DEG C.
(6) SEM and XRD analysis Fe-Al alloy layer salt air corrosion front and rear surfaces-interface topography, chemical element group are passed through
Into the Corrosion Protection of observation figure layer.As shown in Fig. 1 (a), (b), corrosion Front-coating mirror surface is more smooth, and coating is in after corrosion
Sheet is integrally peeled off, and local corrosion does not occur；As shown in Fig. 2 (a), (b), coating only occurs in that pole on thickness before and after corrosion
Small change, coating-substrate binding ability is excellent；As shown in Fig. 3 (a), (b), corrosion Front-coating mirror is rotten based on Fe-Al alloy
Coating is with Al after erosion2O3Based on oxide-film, Corrosion Protection gets a promotion.
Claims (4)
1. a kind of laser remolten method of offshore platform steel arc spraying aluminum coatings, it is characterised in that：Pass through electric arc spraying work
Skill prepares one layer of aluminized coating in offshore platform steel substrate surface, then by Laser Cladding by aluminized coating and surface of bottom material iron
Fusing, forms Fe-Al alloy layer, base material is turned into an entirety with coating, improve the anticorrosive property of coating after cooling；Described
Aluminized coating and surface of bottom material iron are melted by Laser Cladding again, Fe-Al alloy layer is formed after cooling, makes base material and coating
Refer to as an entirety：Laser power is 1000-1200W, and spot diameter is 3-4mm, and sweep speed is 6-8mm/s, and is filled
Enter argon gas as protection gas, to ensure that whole aluminized coatings, with that can enter molten condition at 30-50 μm of substrate surface thickness, fill
Divide reaction, form the Fe-Al alloy layer that thickness is 100-150 μm, make matrix with coating as an entirety.
2. a kind of laser remolten method of offshore platform steel arc spraying aluminum coatings as claimed in claim 1, its feature exists
Referred in described by electric arc spraying process in offshore platform steel substrate surface one layer of aluminized coating of preparation：First to substrate surface
Mechanical grinding is carried out, chemical liquids are cleaned to up to Sa3 grades of cleannes, blasting treatment；Using industrial Ф 2mm aluminium wires as raw material, it is ensured that
Its purity ＞ 99.5%, molten state is heated to using the heat energy of electric arc by aluminium wire, and its operating voltage is 20-32V, and electric current is 150-
300A, using 0.5-0.6Mpa high pressure draught as power, substrate surface is sprayed onto by molten aluminum, it is ensured that the translational speed of spray gun is
300-400mm/s, spray distance is to cool down 80min-100min after the completion of 5-8mm, spraying, substrate surface is covered a layer thickness
For 200-250 μm of aluminized coating, coating forms good mechanical bond and a small amount of metallurgical binding with matrix.
3. a kind of laser remolten method of offshore platform steel arc spraying aluminum coatings as claimed in claim 2, its feature exists
In：Described carries out mechanical grinding to substrate surface first, and chemical liquids are cleaned to be referred to up to Sa3 grades of cleannes：Use 180#-1000#
Sand paper is polished substrate surface, with washes of absolute alcohol, acetone degreasing, to remove specimen surface grease and debris, it is ensured that
Substrate surface cleanliness reaches Sa3 grades.
4. a kind of laser remolten method of offshore platform steel arc spraying aluminum coatings as claimed in claim 2, its feature exists
Refer in the blasting treatment：The use of particle diameter is that 1mm iron-sands are abrasive particle, compressed air pressure ＞ 0.8MPa, sandblasting distance is
200mm, sandblasting angle is 20 °, smart rugosity is reached RZ60 μm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510393588.6A CN104928617B (en) | 2015-07-08 | 2015-07-08 | A kind of laser remolten method of offshore platform steel arc spraying aluminum coatings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510393588.6A CN104928617B (en) | 2015-07-08 | 2015-07-08 | A kind of laser remolten method of offshore platform steel arc spraying aluminum coatings |
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| Publication Number | Publication Date |
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| CN104928617A CN104928617A (en) | 2015-09-23 |
| CN104928617B true CN104928617B (en) | 2017-10-20 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106399897A (en) * | 2016-09-22 | 2017-02-15 | 常州大学 | Method and device for preparing amorphous aluminum coating by means of laser thermal spraying |
| CN109440049B (en) * | 2017-11-27 | 2020-12-01 | 常州大学 | Method for preparing amorphous aluminum coating by compounding electric arc spraying and laser remelting |
| CN109023210A (en) * | 2018-08-10 | 2018-12-18 | 天津德天助非晶纳米科技有限公司 | The preparation method of cast iron alitizing coating |
| CN109112461B (en) * | 2018-09-30 | 2020-10-09 | 常州大学 | Method for preparing aluminum-based amorphous composite ceramic coating on surface of ocean platform steel by laser two-step method |
| CN110643922A (en) * | 2019-10-24 | 2020-01-03 | 广东石油化工学院 | Surface modification method of twin-wire arc spraying and laser remelting |
| CN111004992A (en) * | 2019-12-13 | 2020-04-14 | 西安交通大学 | Process for in-situ synthesis of Fe-Al coating through laser remelting |
Family Cites Families (5)
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| DE3310650C1 (en) * | 1983-03-24 | 1984-03-29 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München | Method of improving thermally sprayed-on alpha -Al2O3 layers |
| CN101139690A (en) * | 2007-10-18 | 2008-03-12 | 天津大学 | Method for preparing Fe3Al intermetallic compound coating |
| CN101532121B (en) * | 2009-04-13 | 2010-10-20 | 姚庆君 | Technology for processing metal surface by arc spray melting |
| CN102277552A (en) * | 2010-06-09 | 2011-12-14 | 上海工程技术大学 | Metal surface treatment method employing arc-plasma spraying-laser remelting |
| CN102181857B (en) * | 2011-05-12 | 2012-07-25 | 华北电力大学 | Method for preparing seawater corrosion resistant cladding layer on steel matrix |
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Effective date of registration: 20230817 Address after: 213200 No. 99, Longxi Avenue, Zhulin Town, Jintan District, Changzhou City, Jiangsu Province Patentee after: Changzhou Longyi Intelligent Machinery Co.,Ltd. Patentee after: Changzhou Jintan Zhuanxin Intellectual Property Operation Co.,Ltd. Address before: Gehu Lake Road Wujin District 213164 Jiangsu city of Changzhou province No. 1 Patentee before: CHANGZHOU University |
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Effective date of registration: 20240124 Address after: 213200 No. 99, Longxi Avenue, Zhulin Town, Jintan District, Changzhou City, Jiangsu Province Patentee after: Changzhou Longyi Intelligent Machinery Co.,Ltd. Country or region after: China Address before: 213200 No. 99, Longxi Avenue, Zhulin Town, Jintan District, Changzhou City, Jiangsu Province Patentee before: Changzhou Longyi Intelligent Machinery Co.,Ltd. Country or region before: China Patentee before: Changzhou Jintan Zhuanxin Intellectual Property Operation Co.,Ltd. |