CN102864449A - Method for alloying surface of aluminum based on nano technology - Google Patents
Method for alloying surface of aluminum based on nano technology Download PDFInfo
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- CN102864449A CN102864449A CN2012103666481A CN201210366648A CN102864449A CN 102864449 A CN102864449 A CN 102864449A CN 2012103666481 A CN2012103666481 A CN 2012103666481A CN 201210366648 A CN201210366648 A CN 201210366648A CN 102864449 A CN102864449 A CN 102864449A
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Abstract
The invention relates to a method for alloying the surface of aluminum based on a nano technology, belonging to the technical field of metal surface alloying. Nano aluminum-iron powder obtained through ball grinding is coated on the surface of an aluminum plate, and infiltrated into the surface of aluminum for reaching alloying by using a hydrogen atmosphere under a high-temperature environment, so that the content of iron on the surface reaches 10-13 percent, therefore the purpose of improving surface hardness and corrosion resistance of the aluminum plate by a simple process is achieved. Through tests, a treated sample is greatly improved in hardness and corrosion resistance.
Description
Technical field
The present invention relates to a kind ofly based on the method for nanotechnology at the aluminium surface alloying, belong to the Alloying on Metal Planes technical field.
Background technology
Alloying on Metal Planes is to change the composition of base metal surface layer and the material protection technology of tissue by diffusion.Mainly be to generate the various special compound layer that passive film or acquisition and matrix have metallurgical binding at the ambient conditions lower surface, so that the hardness of material, wear resistance, corrosion resistance nature and high temperature oxidation resistance improve, this is a kind of method of important raising Mechanical Property of Metal.
Main application is surface alloying layer or the infiltration layer of aluminium, chromium, silicon, vanadium, zinc etc. in machinofacture.Infiltration layer utilizes metal halide steam and matallic surface layer to produce chemical reaction and forms, or chemical reaction occurs in liquid phase to be formed.For aluminium multiple infiltration layer is arranged.The earliest be carbon steel or low alloy steel matrix obtain to contain aluminium approximately 25%, about 125～1000 microns the coating of bed thickness.This coating has long-term anti-800 ℃ of abilities with interior oxidation in atmosphere or furnace gas, for the production of the member of airheater, process furnace and vapor superheater.Ferroaluminium need to be heated to 1080 ℃ in penetration enhancer, obtained the coating of 25～150 micron thick through 24 hours.If ooze the front diffusion shielding layer (such as platinum) that plates first, just can suppress or delay the phase mutual diffusion between metallic element in matrix and the coating.
The novel method of utilizing in recent years nanotechnology to carry out material modification develops rapidly, has been widely used in preparations of nanomaterials and metal surface modification.Just someone begins to prepare TiO at alloy surface about the nineties in 20th century greatly
2, Al
2O
3And SiO
2Coating, and their application conducted extensive research, be proved have good high temperature resistance, corrosion resistant ability.But the oxide coating of one-component or two-pack has certain limitation, in order better to improve the performance of coating, people begin to attempt preparation multi-component oxide coating, can be that film is more continuous and fine and close like this, improve erosion resistance and the thermostability of material.Nano science is to be born also just in the frontier nature of fast development, the high-tech new branch of science field of intercrossing late 1980s.The metallic particles of nano-scale is owing to having the special character such as small-size effect, quantum ruler effect, surface effects and macro quanta tunnel effect, thereby have optics, electromagnetism and a chemical property that is different from the respective masses material, compare with conventional material, it has unrivaled superiority in fields such as Materials science, information science, catalysis and life sciences, in practical application with all have in theory a great researching value.In addition, along with the development of technology, the preparation of nano-powder and nano thin-film, research and application are also more and more extensive.
Based on forefathers' achievement in research, the present invention combines the hot research fields such as process for treating surface, fabrication method and surface of steel plate alloying of metallic coating.The present invention combines by technology such as mechanical milling method and supersound process to prepare nano level ferro-aluminum powder, then it is evenly sprayed the surface that covers aluminium, utilizes H
2Hot environment is infiltrated the aluminium surface uniformly under the atmosphere, so that Surface Fe content reaches 10% ~ 13%, improves aluminium surface hardness and corrosion proof purpose thereby reach by simple technique.
Summary of the invention
The purpose of this invention is to provide a kind of based on the method for nanotechnology at the aluminium surface alloying.
The present invention is characterized in that having following process and step in the method for aluminium surface alloying:
A. polished from coarse to fine in the surface of common cold rolled aluminum, then carry out mechanical polishing, through dehydrated alcohol, acetone and deionized water successively ultrasonic cleaning, guarantee the cleaning surfaces no-sundries.At last aluminium sheet is carried out ageing treatment, at 100 ~ 150 ℃, kept 5 ~ 15 hours, stablize tissue and the size of aluminium sheet;
B. adopt the mechanical ball milling method, put into the spheroidal graphite tank after technically pure iron and aluminium powder mixed by the certain mass ratio, add a certain amount of alcohol, ball milling 20 ~ 30 hours, the nanometer aluminum iron powder that ball milling is good is coated to the surface of aluminium, and cover thickness is 20 μ m ~ 75 μ m; The concrete technology parameter is as follows;
Fe: Al=1:(4 ~ 8) (mass ratio);
Ethanol: powder=5: the 1(mass ratio);
High energy ball mill rotating speed=500r/min;
Ball-milling Time=20 ~ 30 h;
The aluminium sheet that c. will cover nanometer layer places in the hydrogen atmosphere stove.Temperature rise rate is controlled at 10 ~ 20 ℃/min and is warming up to 400 ~ 800 ℃ under hydrogen atmosphere, and soaking time is 2 ~ 6h, then furnace cooling; Finally obtain the ferroaluminium rete of surface of aluminum plate.
Advantage of the present invention is simple for process.By the ferro-aluminum powder in surface of steel plate coated with nano level, reduce heat and ooze temperature, under hydrogen divided, hot environment was infiltrated the surface of cold rolled aluminum uniformly in the time of highly active Fe atom utilization reduction; Simultaneously can control the purpose that coated with nano level ferro-aluminum powder thickness reaches the control surface iron level, improve greatly surface hardness and the corrosion resistance nature thereof of aluminium.
Embodiment
Implementation of the present invention is described in down:
Embodiment 1
1. at first that the conventional aluminium surface finish is smooth, and at 150 ℃, keep carrying out ageing treatment in 10 hours, tissue and the size of aluminium sheet stablized.
2. adopt the mechanical ball milling method, put into the spheroidal graphite tank after technically pure iron and aluminium powder are mixed than 1:5 by certain mass, add a certain amount of alcohol, the adjustment liquid-solid ratio is 5:1, and the high energy ball mill rotating speed is 500r/min, ball milling 28 hours.
3. the nanometer aluminum iron powder that ball milling is good is coated to surface of pure aluminum, and cover thickness is 22 μ m.
4. the aluminium sheet that will cover nanometer layer places in the hydrogen atmosphere stove.Temperature rise rate is controlled at 15 ℃/min and is warming up to 400 ℃ under hydrogen atmosphere, and soaking time is 2h, furnace cooling.
5. the aluminium sheet after will processing carries out the Vickers' hardness test and surveys its corrosive nature by the Ta Feier test.
Embodiment 2
1. at first that the conventional aluminium surface finish is smooth, and at 150 ℃, keep carrying out ageing treatment in 10 hours, tissue and the size of aluminium sheet stablized.
2. adopt the mechanical ball milling method, put into the spheroidal graphite tank after technically pure iron and aluminium powder are mixed than 1:5 by certain mass, add a certain amount of alcohol, the adjustment liquid-solid ratio is 5:1, and the high energy ball mill rotating speed is 500r/min, ball milling 28 hours.
3. the nanometer aluminum iron powder that ball milling is good is coated to surface of pure aluminum, and cover thickness is 47 μ m.
4. the aluminium sheet that will cover nanometer layer places in the hydrogen atmosphere stove.Temperature rise rate is controlled at 15 ℃/min and is warming up to 400 ℃ under hydrogen atmosphere, and soaking time is 4h, furnace cooling.
5. the aluminium sheet after will processing carries out the Vickers' hardness test and surveys its corrosive nature by the Ta Feier test.
Embodiment 3
1. at first that the conventional aluminium surface finish is smooth, and at 150 ℃, keep carrying out ageing treatment in 10 hours, tissue and the size of aluminium sheet stablized.
2. adopt the mechanical ball milling method, put into the spheroidal graphite tank after technically pure iron and aluminium powder are mixed than 1:5 by certain mass, add a certain amount of alcohol, the adjustment liquid-solid ratio is 5:1, and the high energy ball mill rotating speed is 500r/min, ball milling 28 hours.
3. the nanometer aluminum iron powder that ball milling is good is coated to surface of pure aluminum, and cover thickness is 65 μ m.
4. the aluminium sheet that will cover nanometer layer places in the hydrogen atmosphere stove.Temperature rise rate is controlled at 15 ℃/min and is warming up to 400 ℃ under hydrogen atmosphere, and soaking time is 6h, furnace cooling.
5. the aluminium sheet after will processing carries out the Vickers' hardness test and surveys its corrosive nature by the Ta Feier test.
Embodiment 4
1. at first that the conventional aluminium surface finish is smooth, and at 150 ℃, keep carrying out ageing treatment in 10 hours, tissue and the size of aluminium sheet stablized.
2. adopt the mechanical ball milling method, put into the spheroidal graphite tank after technically pure iron and aluminium powder are mixed than 1:5 by certain mass, add a certain amount of alcohol, the adjustment liquid-solid ratio is 5:1, and the high energy ball mill rotating speed is 500r/min, ball milling 28 hours.
3. the nanometer aluminum iron powder that ball milling is good is coated to surface of pure aluminum, and cover thickness is 24 μ m.
4. the aluminium sheet that will cover nanometer layer places in the hydrogen atmosphere stove.Temperature rise rate is controlled at 15 ℃/min and is warming up to 600 ℃ under hydrogen atmosphere, and soaking time is 2h, furnace cooling.
5. the aluminium sheet after will processing carries out the Vickers' hardness test and surveys its corrosive nature by the Ta Feier test.
Embodiment 5
1. at first that the conventional aluminium surface finish is smooth, and at 150 ℃, keep carrying out ageing treatment in 10 hours, tissue and the size of aluminium sheet stablized.
2. adopt the mechanical ball milling method, put into the spheroidal graphite tank after technically pure iron and aluminium powder are mixed than 1:5 by certain mass, add a certain amount of alcohol, the adjustment liquid-solid ratio is 5:1, and the high energy ball mill rotating speed is 500r/min, ball milling 28 hours.
3. the nanometer aluminum iron powder that ball milling is good is coated to surface of pure aluminum, and cover thickness is 45 μ m.
4. the aluminium sheet that will cover nanometer layer places in the hydrogen atmosphere stove.Temperature rise rate is controlled at 15 ℃/min and is warming up to 600 ℃ under hydrogen atmosphere, and soaking time is 4h, furnace cooling.
5. the aluminium sheet after will processing carries out the Vickers' hardness test and surveys its corrosive nature by the Ta Feier test.
Embodiment 6
1. at first that the conventional aluminium surface finish is smooth, and at 150 ℃, keep carrying out ageing treatment in 10 hours, tissue and the size of aluminium sheet stablized.
2. adopt the mechanical ball milling method, put into the spheroidal graphite tank after technically pure iron and aluminium powder are mixed than 1:5 by certain mass, add a certain amount of alcohol, the adjustment liquid-solid ratio is 5:1, and the high energy ball mill rotating speed is 500r/min, ball milling 28 hours.
3. the nanometer aluminum iron powder that ball milling is good is coated to surface of pure aluminum, and cover thickness is 68 μ m.
4. the aluminium sheet that will cover nanometer layer places in the hydrogen atmosphere stove.Temperature rise rate is controlled at 15 ℃/min and is warming up to 600 ℃ under hydrogen atmosphere, and soaking time is 6h, furnace cooling.
5. the aluminium sheet after will processing carries out the Vickers' hardness test and surveys its corrosive nature by the Ta Feier test.
Embodiment 7
1. at first that the conventional aluminium surface finish is smooth, and at 150 ℃, keep carrying out ageing treatment in 10 hours, tissue and the size of aluminium sheet stablized.
2. adopt the mechanical ball milling method, put into the spheroidal graphite tank after technically pure iron and aluminium powder are mixed than 1:5 by certain mass, add a certain amount of alcohol, the adjustment liquid-solid ratio is 5:1, and the high energy ball mill rotating speed is 500r/min, ball milling 28 hours.
3. the nanometer aluminum iron powder that ball milling is good is coated to surface of pure aluminum, and cover thickness is 23 μ m.
4. the aluminium sheet that will cover nanometer layer places in the hydrogen atmosphere stove.Temperature rise rate is controlled at 15 ℃/min and is warming up to 800 ℃ under hydrogen atmosphere, and soaking time is 2h, furnace cooling.
5. the aluminium sheet after will processing carries out the Vickers' hardness test and surveys its corrosive nature by the Ta Feier test.
Embodiment 8
1. at first that the conventional aluminium surface finish is smooth, and at 150 ℃, keep carrying out ageing treatment in 10 hours, tissue and the size of aluminium sheet stablized.
2. adopt the mechanical ball milling method, put into the spheroidal graphite tank after technically pure iron and aluminium powder are mixed than 1:5 by certain mass, add a certain amount of alcohol, the adjustment liquid-solid ratio is 5:1, and the high energy ball mill rotating speed is 500r/min, ball milling 28 hours.
3. the nanometer aluminum iron powder that ball milling is good is coated to surface of pure aluminum, and cover thickness is 44 μ m.
4. the aluminium sheet that will cover nanometer layer places in the hydrogen atmosphere stove.Temperature rise rate is controlled at 15 ℃/min and is warming up to 800 ℃ under hydrogen atmosphere, and soaking time is 4h, furnace cooling.
5. the aluminium sheet after will processing carries out the Vickers' hardness test and surveys its corrosive nature by the Ta Feier test.
Embodiment 9
1. first that the conventional aluminium surface finish is smooth, and at 150 ℃, keep carrying out ageing treatment in 10 hours, tissue and the size of aluminium sheet stablized.
2. use the mechanical ball milling method, put into the spheroidal graphite tank after technically pure iron and aluminium powder are mixed than 1:5 by certain mass, add a certain amount of alcohol, the adjustment liquid-solid ratio is 5:1, and the high energy ball mill rotating speed is 500r/min, ball milling 28 hours.
3. the nanometer aluminum iron powder that ball milling is good is coated to surface of pure aluminum, and cover thickness is 75 μ m.
4. the aluminium sheet that will cover nanometer layer places in the hydrogen atmosphere stove.Temperature rise rate is controlled at 15 ℃/min and is warming up to 800 ℃ under hydrogen atmosphere, and soaking time is 6h, furnace cooling.
5. the aluminium sheet after will processing carries out the Vickers' hardness test and surveys its corrosive nature by the Ta Feier test.
The test result of each embodiment gained sample sees the following form 1.
Table 1 records the Vickers' hardness of case study on implementation all samples, and the test result of Ta Feier relatively
By upper table 1 as can be known, the nanometer aluminum iron powder that obtains by ball milling is coated to surface of aluminum plate, and the solidity to corrosion of aluminium sheet and hardness all improve greatly after Overheating Treatment.
Claims (1)
1. one kind based on the method for nanotechnology at the aluminium surface alloying, it is characterized in that having following process and step:
A. polished from coarse to fine in the surface of common cold rolled aluminum, then carry out mechanical polishing, through dehydrated alcohol, acetone and deionized water successively ultrasonic cleaning, guarantee the cleaning surfaces no-sundries; At last aluminium sheet is carried out ageing treatment, at 100 ~ 150 ℃, kept 5 ~ 15 hours, stablize tissue and the size of aluminium sheet;
B. adopt the mechanical ball milling method, technically pure iron and aluminium powder are put into the spheroidal graphite tank after necessarily (mass ratio) mixes, add a certain amount of alcohol, ball milling 20 ~ 30 hours, the nanometer aluminum iron powder that ball milling is good is coated to surface of aluminum plate, and cover thickness is 20 μ m ~ 75 μ m; The concrete technology parameter is as follows:
Fe: Al=1:(4 ~ 8) (mass ratio);
Ethanol: powder=5: the 1(mass ratio);
High energy ball mill rotating speed=500r/min;
Ball-milling Time=20 ~ 30 h;
The aluminium sheet that c. will cover the nano aluminum iron powder places in the hydrogen atmosphere stove;
Temperature rise rate is controlled at 10 ~ 20 ℃/min and is warming up to 400 ~ 800 ℃ under hydrogen atmosphere, and soaking time is 2 ~ 6h, then furnace cooling; Finally obtain the ferroaluminium rete of surface of aluminum plate.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2010099660A (en) * | 2008-10-21 | 2010-05-06 | Toshiba Corp | Manufacturing method of corrosion-resistant member and generator using the corrosion-resistant member |
| CN101709467A (en) * | 2009-10-31 | 2010-05-19 | 桂林电子科技大学 | Method for cladding nano Fe-Al mixed powder alloy layer on aluminum alloy surface by high-energy electron beam heating |
| CN102154617A (en) * | 2011-03-28 | 2011-08-17 | 上海大学 | Cold rolled low-carbon steel surface silicon infiltration alloying method |
| CN102321862A (en) * | 2011-08-31 | 2012-01-18 | 上海大学 | Treatment method for producing ferro-boron alloying on surface of low carbon steel strip base on nanometer technology |
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- 2012-09-28 CN CN2012103666481A patent/CN102864449A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010099660A (en) * | 2008-10-21 | 2010-05-06 | Toshiba Corp | Manufacturing method of corrosion-resistant member and generator using the corrosion-resistant member |
| CN101709467A (en) * | 2009-10-31 | 2010-05-19 | 桂林电子科技大学 | Method for cladding nano Fe-Al mixed powder alloy layer on aluminum alloy surface by high-energy electron beam heating |
| CN102154617A (en) * | 2011-03-28 | 2011-08-17 | 上海大学 | Cold rolled low-carbon steel surface silicon infiltration alloying method |
| CN102321862A (en) * | 2011-08-31 | 2012-01-18 | 上海大学 | Treatment method for producing ferro-boron alloying on surface of low carbon steel strip base on nanometer technology |
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Application publication date: 20130109 |