CN102069290B - Process for preparing Fe3Al/Al composite structure by diffusion bonding - Google Patents
Process for preparing Fe3Al/Al composite structure by diffusion bonding Download PDFInfo
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- CN102069290B CN102069290B CN 201010580638 CN201010580638A CN102069290B CN 102069290 B CN102069290 B CN 102069290B CN 201010580638 CN201010580638 CN 201010580638 CN 201010580638 A CN201010580638 A CN 201010580638A CN 102069290 B CN102069290 B CN 102069290B
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- alloy
- diffusion
- fe3al
- composite construction
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Abstract
The invention belongs to the technical field of non-ferrous metal welding, and discloses a process for preparing a Fe3Al/Al composite structure by diffusion bonding. The process comprises the following steps of: mechanically and chemically cleaning the surfaces of an Fe3Al alloy and an Al alloy before welding; pressing tightly an Fe3Al alloy workpiece and an Al alloy workpiece by a pressure head, and then carrying out diffusion bonding in a vacuum environment; and forming a transition layer with certain thickness at an interface by means of diffusion of Al atoms so as to realize bonding between the Fe3Al alloy and the Al alloy, and finally obtaining the Fe3Al/Al composite structure. The process has the advantages of no need of an intermediate layer and strong applicability, and can be carried out in a heating furnace with a vacuum environment and pressurizing capability.
Description
Technical field
The present invention relates to the metal material processing field, be specially the solder technology of non-ferrous metal, especially the diffusion connection method between non-ferrous metal, specifically diffusion connection preparation Fe
3The method of Al/Al composite construction.
Background technology
Structural material is the important foundation in modern industry field, and its performance has determined the level of industrial equipment.Novel colored metal material is an important class material.Aluminium alloy is the non-ferrous metal that present industrial circle extensively adopts, and has the characteristics such as low-density, high specific strength, easy processing.Fe
3Al is a kind of novel non-ferrous metal, has higher specific strength, good wearability and the characteristic such as corrosion-resistant, is the material that the fields such as Aero-Space, automobile, chemical industry have potentiality.But Fe
3Al has apparent in view environment fragility and lower temperature-room type plasticity.Mode by alloying and the processing of heat engine tool can be improved Fe
3The temperature-room type plasticity of Al and intensity.With Fe
3Al and Al alloy couple together, and can take full advantage of Fe
3The good plasticity of the high strength of Al, wearability and Al alloy obtains the Fe of excellent combination property
3The Al/Al composite construction.In addition, Fe
3Al alloy and Al alloy all have preferably decay resistance, so Fe
3The reliability that the Al/Al composite construction is on active service under corrosive environment is also better.
Present Fe
3The method of attachment that Al is commonly used mainly is that SMAW, argon tungsten-arc welding, electron beam welding and diffusion are connected.Adopt TIG weldering and electron beam welding welding Fe
3During Al, produce easily fire check.For fear of producing fire check, should control the elements such as B, Zr in the wlding, Mo, and increase the carbide formers such as Cr, Nb, C.But the elements such as B, Zr, Mo are Fe
3The Strengthening and Toughening element that the Al alloy is commonly used.Adopt SMAW and Tig Welding Fe
3The cold crack problem appears during Al easily.Airborne steam at high temperature decomposites atomic hydrogen, can be directly and the reaction of the Al in molten bath Generation of atoms hydrogen, and be Fe
3Produce one of principal element of cold crack during the weldering of Al alloy melting.Fe
3The thermal conductivity of Al alloy is little, thermal coefficient of expansion is large, forms larger residual stress in joint area easily in the melting process, helps diffusion, the gathering of hydrogen.Therefore, at Fe
3What Al alloy and foreign material (such as Q235, Cr18-Ni8 etc.) mainly adopted when being connected is that diffusion connects.Main Problems was the boundary zone that is difficult to obtain the microstructure even transition when diffusion connected, and high rigidity fragility phase often occurred easily in the boundary zone, caused the mechanical property of connector area to worsen.At present also not with Fe
3The Al alloy is connected preparation Fe with the Al alloy
3The report of Al/Al composite construction.
Summary of the invention
The present invention aims to provide by diffusion and connects preparation Fe
3The technique of Al/Al composite construction.
The present invention proposes a kind of Fe
3The diffusion connecting process of Al alloy and Al diverse metal alloy material is with Fe
3After mechanical chipping and Chemical cleaning are carried out in the surface of Al alloy and Al alloy, with Fe
3Al alloy and Al alloy workpiece compress with pressure head, spread connection under vacuum environment.Do not need to add the intermediate alloy layer, mainly by the diffusion of Al atom, realization Fe3Al alloy is connected with the Al alloy, obtains Fe
3The Al/Al composite construction.
This diffusion connects preparation Fe
3The technique of Al/Al composite construction may further comprise the steps:
(1) to Fe
3Mechanical chipping and Chemical cleaning and dry are carried out in the surface of Al alloy and Al alloy; After available sand paper is polished step by step, dry up after can cleaning with alcohols (such as ethanol) or acetone again;
Used Fe
3In the Al alloy, the atomic percent of Fe is that the atomic percent of 65～75%, Al is 22～28%;
The percentage by weight of Al is 99.0～99.9% in the Al alloy;
(2) with Fe
3Al alloy and Al alloy workpiece compress with pressure head, are placed on to spread connection in the vacuum chamber, and the diffusion welding craft parameter of employing is: 500～640 ℃ of lower insulation 30～90min, Fe
3Al alloy and Al alloy pressure 15～35MPa, vacuum is 10
-2Pa～10
-3Pa;
In order to obtain uniform Temperature Distribution, adopt heat temperature raising speed and the step mode of heating of 5～10 ℃/min in the heating process, namely respectively at 195～205 ℃ and 395～405 ℃ of lower insulation 8～15min;
(3) reach temperature retention time after, workpiece is taken out after vacuum chamber is cooled to 80～110 ℃, obtain Fe
3The Al/Al composite construction.
Fe
3The transition zone that forms at the interface the about 10-30 μ of thickness m between Al alloy and the Al alloy, joint do not have crackle to form.
Characteristics of the present invention are, utilize diffusion connection method, by the diffusion of Al atom, can realize Fe
3The Al alloy is connected connection with the Al alloy, do not need to add the intermediate layer.This diffusion connection method can obtain in conjunction with good Fe
3The Al/Al heterogenous material joint forms the transition zone of the about 10-30 μ of thickness m at the interface, and the joint does not have crackle to form.
Can carry out in the heating furnace of diffusion connection method of the present invention under vacuum environment and pressurized environment, need not protective gas, technological operation is simple, and applicability is strong, is convenient to use.
The specific embodiment
Embodiment 1
(1) with chemical composition is the Fe of 73Fe-25Al-2Cr at.%
3After the surface of Al alloy and 1060Al alloy (Al 99.6wt%) adopts 200Cw, 400Cw and 600Cw waterproof abrasive paper to polish step by step, with drying up after the ethanol cleaning.
(2) then with Fe
3Al alloy and Al alloy workpiece compress with pressure head, are placed on to spread connection in the vacuum chamber.
The diffusion welding craft parameter that adopts is: 550 ℃ of lower insulation 90min, Fe
3Al alloy and Al alloy pressure 22MPa, vacuum 10
-2Pa～10
-3Pa.10 ℃/the min of programming rate of heating is incubated 10min at 200 ℃ and 400 ℃ respectively in the heating process.
After reaching temperature retention time, by the water circulation cooling, when vacuum chamber is cooled to 100 ℃, with Fe
3Al/Al composite construction joint takes out.
With ESEM to Fe
3The observation of Al/Al joint shows, has formed the transition zone of the about 11-26 μ of thickness m, transition zone and Fe
3The matrix of Al and Al alloy is in conjunction with good, and the joint does not have crackle to form.
Embodiment 2
(1) with chemical composition is the Fe of 73Fe-25Al-2Cr at.%
3After the surface of Al alloy and 1060Al alloy (Al 99.6wt%) adopts 200Cw, 400Cw and 600Cw waterproof abrasive paper to polish step by step, with drying up after ethanol (or acetone) cleaning.
(2) then with Fe
3Al alloy and Al alloy workpiece compress with pressure head, are placed on to spread connection in the vacuum chamber.
The diffusion welding craft parameter that adopts is: 600 ℃ of lower insulation 60min, Fe
3Al alloy and Al alloy pressure 25MPa, vacuum 10
-2Pa～10
-3Pa.5 ℃/the min of programming rate of heating is incubated 10min at 200 ℃ and 400 ℃ respectively in the heating process.
After reaching temperature retention time, by the water circulation cooling, when vacuum chamber is cooled to 100 ℃, Fe3Al/Al composite construction joint is taken out.
With ESEM to Fe
3The observation of Al/Al joint shows, has formed the transition zone of the about 16-26 μ of thickness m, transition zone and Fe
3The matrix of Al and Al alloy is in conjunction with good, and the joint does not have crackle to form.
Claims (4)
1. diffusion connects preparation Fe
3The technique of Al/Al composite construction is characterized in that, may further comprise the steps:
(1) to Fe
3Mechanical chipping and Chemical cleaning and dry are carried out in the surface of Al alloy and Al alloy;
(2) with Fe
3Al alloy and Al alloy compress with pressure head, be placed on and spread connection in the vacuum chamber, the diffusion welding craft parameter that adopts is: be heated to 500～640 ℃ of lower insulation 30～90min, heat temperature raising speed is 5～10 ℃/min, and respectively at 95～205 ℃ and 395～405 ℃ of lower insulation 8～15min; Fe
3Al alloy and Al alloy pressure 15～35MPa, vacuum 10
-2Pa～10
-3Pa;
(3) reach temperature retention time after, take out after vacuum chamber is cooled to 80～110 ℃, obtain Fe
3The Al/Al composite construction.
2. the described diffusion of claim 1 connects preparation Fe
3The technique of Al/Al composite construction is characterized in that, described Fe
3In the Al alloy, the atomic percent of Fe is that the atomic percent of 65～75%, Al is 22～28%.
3. the described diffusion of claim 1 connects preparation Fe
3The technique of Al/Al composite construction is characterized in that, the percentage by weight of Al is 99.0～99.9% in the described Al alloy.
4. the described diffusion of claim 1 connects preparation Fe
3The technique of Al/Al composite construction is characterized in that, the described mechanical chipping of step (1) is for to polish step by step with sand paper, and the solvent that described Chemical cleaning is used is alcohols or acetone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201010580638 CN102069290B (en) | 2010-12-09 | 2010-12-09 | Process for preparing Fe3Al/Al composite structure by diffusion bonding |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010580638 CN102069290B (en) | 2010-12-09 | 2010-12-09 | Process for preparing Fe3Al/Al composite structure by diffusion bonding |
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| CN102069290A CN102069290A (en) | 2011-05-25 |
| CN102069290B true CN102069290B (en) | 2013-01-09 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102328153B (en) * | 2011-09-01 | 2013-07-31 | 河南科技大学 | Crimping diffusion welding process of aluminum or aluminum alloy and heterogeneous metal |
| CN102886599B (en) * | 2012-10-12 | 2014-11-12 | 华中科技大学 | Method for manufacturing multi-layer amorphous alloy and crystal metal composite structure through diffusion welding |
| CN104741772B (en) * | 2013-12-27 | 2017-03-01 | 北京有色金属研究总院 | A kind of welding method connecting rustless steel and aluminium alloy |
| CN112626378B (en) * | 2020-11-30 | 2021-09-14 | 湖南金天铝业高科技股份有限公司 | Iron-aluminum alloy composite reinforced aluminum-based material, and preparation method and application thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0480404A2 (en) * | 1990-10-09 | 1992-04-15 | Daido Tokushuko Kabushiki Kaisha | Corrosion-resistant and heat-resistant metal composite and method of producing |
| CN1559740A (en) * | 2004-02-25 | 2005-01-05 | 山东大学 | Diffusion welding technology of activity increasing intermediate layer of iron trialuminium alloy and steel |
| CN101074476A (en) * | 2007-06-11 | 2007-11-21 | 南京航空航天大学 | Method for producing Fe-Al intermetallic compound layer on surface of iron or steel materials |
| CN101519750A (en) * | 2008-10-28 | 2009-09-02 | 兰州理工大学 | Bulk Fe3Al nanocrystalline material and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3094491B2 (en) * | 1990-04-10 | 2000-10-03 | 大同特殊鋼株式会社 | Sheet-shaped or wire-shaped heater material and method for producing the same |
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2010
- 2010-12-09 CN CN 201010580638 patent/CN102069290B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0480404A2 (en) * | 1990-10-09 | 1992-04-15 | Daido Tokushuko Kabushiki Kaisha | Corrosion-resistant and heat-resistant metal composite and method of producing |
| CN1559740A (en) * | 2004-02-25 | 2005-01-05 | 山东大学 | Diffusion welding technology of activity increasing intermediate layer of iron trialuminium alloy and steel |
| CN101074476A (en) * | 2007-06-11 | 2007-11-21 | 南京航空航天大学 | Method for producing Fe-Al intermetallic compound layer on surface of iron or steel materials |
| CN101519750A (en) * | 2008-10-28 | 2009-09-02 | 兰州理工大学 | Bulk Fe3Al nanocrystalline material and preparation method thereof |
Non-Patent Citations (3)
| Title |
|---|
| JP特开平4-218682A 1992.08.10 |
| 李亚江等.Fe3Al/18-8异种材料真空扩散焊工艺研究.《材料科学与工艺》.2004,第12卷(第1期), * |
| 王娟等.Fe3Al/Q235异种材料扩散焊工艺.《焊接》.2003,(第4期), * |
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