CN100351421C - Ni(Fe)-Al series intermetallic compound coating preparing method - Google Patents
Ni(Fe)-Al series intermetallic compound coating preparing method Download PDFInfo
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- CN100351421C CN100351421C CNB2005100423219A CN200510042321A CN100351421C CN 100351421 C CN100351421 C CN 100351421C CN B2005100423219 A CNB2005100423219 A CN B2005100423219A CN 200510042321 A CN200510042321 A CN 200510042321A CN 100351421 C CN100351421 C CN 100351421C
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Abstract
The present invention discloses a preparation method of an Ni(Fe)Al series intermetallic compound coating layer. The present invention adopts the methods of hot spraying and high temperature metallurgy diffusion, namely that base metal materials are processed in a surface purifying and sand blasting mode. After the materials are coated with pure aluminium, a sealed housing is enclosed on the surface of an aluminium coating layer by water glass and SiO2 uranium materials to further purify the surfaces. The materials are put in a high-temperature electric furnace to carry out the diffusion reaction of high temperature metallurgy. After the furnace is shut down, the materials are cooled to 250 to 300 DEG C together with the furnace, and are taken out of the furnace to be cooled by air. The Ni(Fe)Al series intermetallic compound coating layer suitable for various high temperature corrosive environments and corrosion resistance requirements is obtained by adjusting technological parameters. The coating layer has the advantages of simple preparation process, low cost, wide popularization and application prospect, good high-temperature and corrosion resistance and good abrasiveness of prepared materials, and wide application range.
Description
Technical field
The invention belongs to hot-spraying techniques and prepare the method for intermetallic compound top coat, relate in particular to the preparation method of iron-based or nickel-based metallic material high temperature wearable anti-corrosion top coat.
Technical background
Development of modern industry, Industrial products to industries such as electric power, chemical industry are had higher requirement, require the product can long-term operation under high-parameters (as high temperature, at a high speed, high pressure), increasingly automated and abominable working condition, this just must be to the demands for higher performance of surface of the work.Up to 1300 ℃, Working environment is dense hydrogen sulfide (98%H as the component working temperature of some equipment in petrochemical industry
2S) severe corrosive gas; High temperature and severe corrosive gas have shortened the work-ing life of these component greatly.With its temperature element thermocouple protective casing is example, the protective tube of all kinds of nickel base superalloys, and mean life is only between 7～15 days.At present both at home and abroad extensively the pipe laying of the thermal power generation circular fluid bed that adopts and also only having about three months the work-ing life of water wall has influenced the production efficiency and the economic benefit of power system greatly, also brings very big hidden danger to safety in production.In many fields such as electric power, metallurgy, aviation, chemical industry, automobile, machinery and agriculturals, be badly in need of high-temperature corrosion resistance and lost material and component, still there is not desirable effective solution at present.
Intermetallic compound is good high-temperature structural material, has excellent high temperature corrosion-resisting and wear-resistant property, can be good at satisfying above-mentioned needs; But such material exists room temperature fragility big, and fracture resistance is low, and shortcomings such as preparation processing difficulties are very limited as the structural material applications scope.
Wear-resisting, the anti-corrosion type coating that the conventional coatings technology is prepared, generally all be to constitute by the polyphase alloy material, or by alloy material, intermetallic compound, the heterogeneous compound coating that pottery forms, because the difference of each phase electrochemical characteristic in the coating, at high temperature be easy to form galvanic corrosion or local corrosion, quickened the damage inactivation of coating, can not well satisfy industrial needs.
Summary of the invention
The present invention is directed to the problems referred to above, the preparation method of a kind of single-phase layered distribution Ni (Fe)-Al series intermetallic compound coating is provided, by this method intermetallic compound is used the deficiency that solves compound between metal current in the mode of top coat, prepare the material or the component that contain high-temperature wearable erosion property intermetallic compound coating.
Technical scheme: adopt thermospray to increase temperature metallurgical diffusion process.Concrete steps are:
1, the matrix metal material is earlier through surface cleaning, and sandblasting obtains active surface; 2, utilize electric arc spraying equipment to spray fine aluminium on metal material matrix, obtain the fine aluminium coating, thickness is between 2～3mm; 3, utilize water glass and SiO
2The uranium material is at aluminum coating surface sealing one sealed enclosure; 4, make further surface cleaning and handle, put into high-temperature electric resistance furnace then and carry out the pyrometallurgy diffusion reaction, diffusion temperature is between 850～950 ℃, and be 2～5hr diffusion time; 5, material cools to 250～300 ℃ with the furnace after the blowing out, the air cooling of coming out of the stove again, and acquisition has single-phase layered distribution Ni (the Fe)-Al series intermetallic compound coating of excellent anticorrosive performance.
The high-temperature structural material of widespread usage in industry is iron-based or nickel base superalloy, and according to iron aluminium or alumel phasor, Fe, Ni element and Al element at high temperature all can form Ni (Fe)-Al series intermetallic compound mutually by chemical combination, as FeAl, Fe
2Al
5, NiAl, Ni
3Al etc., and reaction in reaction process, can form the intermetallic compound coating of layered distribution for the spontaneous reaction of heat release by control reaction temperature and time.
This invention positively effect is: 1, intermetallic compound is single-phase layered distribution in the coating, and corrosion resistance nature is very excellent, and this type coating is particularly useful for ultrahigh-temperature (1300 ℃) and the strong oxidizing property atmosphere industrial and mineral environment that common material is difficult to bear.2, this method combines material preparation and coating preparation and carries out, coating and matrix are diffusion-bonded, and the oxidation-resistance element al reduces transition in gradient gradually from the top layer to the matrix content, promptly guarantee corrosion resistance of coating, realized the thermal stresses coupling of coating and body material again.3, Ni (Fe)-Al series intermetallic compound material is used in the mode of coating, avoided the deficiency of compound between conventional metals to enlarge the range of application of such material, open up it and entered the new way of industrial application, efficiently solve simultaneously the high temperature corrosion-resisting and the wear problem of structured material in the industrial production again, prolonged the work-ing life of this type of material.4, preparation technology of coating is simple, and cost is lower, and popularizing application prospect is wide.
Description of drawings
Fig. 1 is the Ni-Al series intermetallic compound coating micro-organization chart that adopts this method to obtain on GH3030 nickel base superalloy matrix; Fig. 2 adopts the high temperature oxidation weightening finish of this method gained Ni-Al series intermetallic compound and the graph of a relation of oxidization time on GH3030 superalloy matrix; Fig. 3 is the Fe-Al series intermetallic compound coating micro-organization chart that adopts this method to obtain on the 0Cr25Ni20 iron-base superalloy;
Embodiment
Be example explanation preparation method with preparation Ni-Al series intermetallic compound coating on the thermocouple protective casing of making at the GH3030 nickel-base material below.
1,, obtains active surface with sandblasting behind the GH3030 nickel base superalloy thermocouple protective casing surface cleaning; 2, on sleeve pipe, spray the fine aluminium of 2mm with electric arc spraying equipment; 3, cast one deck water glass and SiO on the fine aluminium coating
2Glaze forms sealed enclosure; 4, sealed enclosure is made further purifying treatment, put into High Temperature Furnaces Heating Apparatus again and carry out the pyrometallurgy diffusion reaction, 950 ℃ of diffusion temperatures; 5, diffusion blowing out after 4.5 hours allows protective casing slowly cooling in stove, takes out naturally cooling in air when furnace temperature drops to 250 ℃.
This thermocouple protective casing is used on ethane cracking furnace, and extended to 5 month or more by original 10～15 days work-ing life.
As can be seen from Figure 1 the Ni-Al series intermetallic compound coating microstructure that obtains with this method is very obvious, and the A district is Ni
2Al
3And Al
2Cr
3Etc. rich aluminium phase constitution, the B district is the NiAl phase constitution, and the C district is Ni
3The Al phase constitution, the D district is a matrix.Fig. 2 shows that three groups of sample 500h static oxidation weightening finish speed are respectively 0.021,0.018,0.028g/m
2H, result show that antioxidant property is very excellent.
Use the same method at 0Cr
25Ni
20Can obtain the Fe-Al series intermetallic compound coating on the iron-base superalloy.
As can be seen from Figure 3, at 0Cr
25Ni
20The Fe-Al series intermetallic compound coating microstructure that adopts this method to obtain on the iron-base superalloy is also very obvious, and the E district is Al
2The Cr phase is mainly FeAl and NiAl mutually shown in the F district, the G district is depicted as Fe
3The Al phase, the H district is depicted as matrix austenite phase.
Claims (2)
1, a kind of Ni-Al series intermetallic compound coating preparation method is characterized in that may further comprise the steps:
(1) with nickel-based matrix metallic substance elder generation process surface cleaning, sandblasting obtains active surface;
(2) utilize the fine aluminium coating of electric arc spraying equipment at nickel-based matrix metal material surface spraying 2～3mm;
(3) cast one deck water glass and SiO on the fine aluminium coating
2Glaze forms sealed enclosure;
(4) make further surface cleaning and handle, put into high-temperature electric resistance furnace then and carry out the pyrometallurgy diffusion reaction, diffusion temperature is 850～950 ℃, and be 2～5hr diffusion time;
(5) material cools to 250～300 ℃ with the furnace after the blowing out, and the air cooling of coming out of the stove again obtains single-phase layered distribution Ni-Al series intermetallic compound coating.
2, a kind of Fe-Al series intermetallic compound coating preparation method is characterized in that may further comprise the steps:
(1) with iron-based matrix metallic substance elder generation process surface cleaning, sandblasting obtains active surface;
(2) utilize the fine aluminium coating of electric arc spraying equipment at iron-based matrix metal material surface spraying 2～3mm;
(3) cast one deck water glass and SiO on the fine aluminium coating
2Glaze forms sealed enclosure;
(4) make further surface cleaning and handle, put into high-temperature electric resistance furnace then and carry out the pyrometallurgy diffusion reaction, diffusion temperature is 850～950 ℃, and be 2～5hr diffusion time;
(5) material cools to 250～300 ℃ with the furnace after the blowing out, and the air cooling of coming out of the stove again obtains single-phase layered distribution Fe-Al series intermetallic compound coating.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100423219A CN100351421C (en) | 2005-01-10 | 2005-01-10 | Ni(Fe)-Al series intermetallic compound coating preparing method |
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|---|---|---|---|
| CNB2005100423219A CN100351421C (en) | 2005-01-10 | 2005-01-10 | Ni(Fe)-Al series intermetallic compound coating preparing method |
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|---|---|
| CN1641061A CN1641061A (en) | 2005-07-20 |
| CN100351421C true CN100351421C (en) | 2007-11-28 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101994077A (en) * | 2010-10-27 | 2011-03-30 | 江苏科技大学 | High-temperature oxidation resisting intermetallic compound coating and preparation method thereof |
| CN102059327B (en) * | 2010-12-20 | 2012-09-05 | 西安交通大学 | Method for preparing heat-conductive wear-resistant coating on surface of continuous casting mold |
| CN102154641B (en) * | 2011-03-01 | 2012-12-19 | 山东科技大学 | Magnesium alloy surface Mg17Al12 coating and cladding process thereof |
| CN102864317A (en) * | 2011-07-08 | 2013-01-09 | 王西临 | Sponge titanium reduction and distillation reactor sprayed with anti-oxidation layer on outer surface and spraying method |
| CN115383114B (en) * | 2022-09-19 | 2024-01-19 | 西北有色金属研究院 | Preparation method of high-porosity Al-rich phase porous Ni-Al intermetallic compound |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4398967A (en) * | 1979-09-11 | 1983-08-16 | Devan Jackson H | Method for inhibiting alkali metal corrosion of nickel-containing alloys |
| CN2261434Y (en) * | 1995-10-10 | 1997-09-03 | 耿军 | Aluminum coating steel profile |
| JP2001081539A (en) * | 1999-09-10 | 2001-03-27 | Nippon Steel Corp | Hot dip aluminum plated steel sheet excellent in high temperature corrosion resistance and its manufacture |
| CN1324958A (en) * | 2000-05-18 | 2001-12-05 | 中国科学院海洋研究所 | Anticorrosion method of marine steel |
-
2005
- 2005-01-10 CN CNB2005100423219A patent/CN100351421C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4398967A (en) * | 1979-09-11 | 1983-08-16 | Devan Jackson H | Method for inhibiting alkali metal corrosion of nickel-containing alloys |
| CN2261434Y (en) * | 1995-10-10 | 1997-09-03 | 耿军 | Aluminum coating steel profile |
| JP2001081539A (en) * | 1999-09-10 | 2001-03-27 | Nippon Steel Corp | Hot dip aluminum plated steel sheet excellent in high temperature corrosion resistance and its manufacture |
| CN1324958A (en) * | 2000-05-18 | 2001-12-05 | 中国科学院海洋研究所 | Anticorrosion method of marine steel |
Non-Patent Citations (1)
| Title |
|---|
| 高温扩散法制备铁铝金属间化合物涂层 王灿明，孙宏飞，万殿茂，于姜杰.材料保护，第36卷第3期 2003 * |
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