CN107160054A - Aluminium alloy, aluminum steel composite material and cooling tube bundle - Google Patents
Aluminium alloy, aluminum steel composite material and cooling tube bundle Download PDFInfo
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- CN107160054A CN107160054A CN201710415170.XA CN201710415170A CN107160054A CN 107160054 A CN107160054 A CN 107160054A CN 201710415170 A CN201710415170 A CN 201710415170A CN 107160054 A CN107160054 A CN 107160054A
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- composite material
- aluminum steel
- steel composite
- fin
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/28—Selection of soldering or welding materials proper with the principal constituent melting at less than 950 degrees C
- B23K35/286—Al as the principal constituent
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
Abstract
The present invention discloses a kind of aluminium alloy, aluminum steel composite material and cooling tube bundle for preparing aluminum steel composite material.The aluminium alloy component is by weight percentage：9.0% 10.5% Si, 1.0% 2.0% Mg, less than 0.8% Fe, less than 0.1% Mn, less than 0.25% Cu, less than 0.2% Zn, remaining is Al and inevitable impurity.The aluminum steel composite material is composited by above-mentioned aluminium alloy and steel.The cooling tube bundle includes base tube and fin, and base tube at least a portion is made up of above-mentioned aluminum steel composite material.In brazing process, aluminum steel composite material of the invention can be used as solder also can be as brazing flux.Therefore, the aluminum steel composite material can realize that the fin with single alloy is welded, and weld strength meets the requirements.Therefore fin cost will be substantially reduced using the aluminum steel composite material, and anti sag property is more excellent, the problems such as being more not in corrosion.
Description
Technical field
The invention belongs to technical field of composite materials, and in particular to a kind of aluminium alloy for preparing aluminum steel composite material, aluminum steel
Composite and cooling tube bundle.
Background technology
Aluminum steel composite material is a kind of metal layer structure composite, is widely used for electric power, automobile, kitchen tools, decoration
Deng field.Aluminum steel composite material has the excellent decay resistance of aluminium alloy and heat conductivility and the good mechanical property of steel etc. concurrently
Plurality of advantages, is the main raw material(s) of the base tube of cooling tube bundle in power station air cooling system core component.In order to increase the base tube
Intensity of cooling, fin is equipped with its outer surface, and both are generally attached using brazing mode.Using aluminum steel composite material system
The power station air cooling system substitution water-cooling system made, can using water wisely more than 75%.
At present, the soldering industrially used is aluminium with aluminum steel composite material：4A60 aluminium alloys, steel：08Al ultra-low-carbon steels.Its
In, the finished product thickness of aluminum steel composite material is between 1.4~1.6mm, as the aluminum layer thickness of clad in 0.05~0.09mm
Between.Due to aluminium lamination use Si contents for 0.8% 4A60 aluminium alloys, so carry out cooling tube bundle base tube and fin pricker
During weldering, in addition it is also necessary to which the coating of composite fin provides solder and causes the fin and the aluminium lamination soldering.Therefore, prior art is usually used
The aluminium lamination of 4XXX/3XXX/4XXX composite fins and base tube carries out soldering, the fins of single 3XXX alloys equal nothing in any condition
Method and the aluminium lamination are successfully welded.
Further, since aluminium is big to the affinity of oxygen, often there is one layer of fine and close oxide-film in aluminium lamination surface, cause solder not
It can be come well in aluminium lamination surface spreading, hinder the phase counterdiffusion of solder atom and aluminium lamination atom, finally influence soldering
Joint quality；And in welding process, composite fin is likely to occur corrosion phenomenon, occur after corrosion, composite fin intensity drop
It is low, anti sag property reduction, and then influence the radiating effect of composite fin.
The content of the invention
In view of the shortcomings of the prior art, present invention firstly provides a kind of aluminium alloy for preparing aluminum steel composite material, its group
Divide and be by weight percentage：9.0%-10.5% Si, 1.0%-2.0% Mg, less than 0.8% Fe, less than 0.1%
Mn, less than 0.25% Cu, less than 0.2% Zn, remaining is Al and inevitable impurity.
Present invention also offers a kind of aluminum steel composite material, it is constituted by coating and basic unit are compound, the material of the coating
For above-mentioned aluminium alloy, the material of the basic unit is steel.
Preferably, the material of the basic unit is straight carbon steel.
It is highly preferred that C percentage by weight is less than 0.15% and is not zero in the material of the basic unit.
More preferably, the material of the basic unit is 08Al steel.
It is further preferred that the component of the material of the basic unit is by weight percentage：C is less than 0.1% and is not zero that Si is
Less than 0.15%, Mn are that less than 0.3%, P is that less than 0.02%, S is less than 0.02%, and remaining is Fe and inevitably miscellaneous
Matter.Preferably, the component of the material of the basic unit is by weight percentage：0.007%-0.08% C, 0.012%-0.14%
Si, 0.19%-0.27% Mn, 0.015%-0.02% P, 0.004%-0.02% S, remaining is Fe and inevitable
Impurity.
Preferably, the coating and the basic unit constitute the aluminum steel composite material by Rolling compund.
It is highly preferred that the coating thickness is 80-100 μm.
Present invention also offers a kind of cooling tube bundle, the cooling tube bundle includes base tube and fin, the base tube at least one
Part is made up of above-mentioned aluminum steel composite material, and the fin is connected with the coating of the aluminum steel composite material.
Preferably, the material of the fin is single aluminium alloy.Single aluminium alloy is 3XXX line aluminium alloys.
The aluminum steel composite material that the present invention is provided is the Al-Si alloys containing Mg due to alclad, it is possible to achieve vacuum condition
The lower fin material with single aluminium alloy is welded, and weld strength meets the requirements, up to 50MPa (fracture of fin material).By
It is high compared with composite alloy fin in single alloy fins lumber recovery, and fin preparation section is simplified, therefore be combined using the aluminum steel
Material will substantially reduce fin cost, and anti sag property is more excellent, the problems such as being more not in corrosion.
Brief description of the drawings
Fig. 1 is the leg metallographic structure figure that product is made in embodiment 4；
Fig. 2 is the leg metallographic structure figure that product is made in embodiment 5；
Fig. 3 is the leg metallographic structure figure that product is made in embodiment 6；
Fig. 4 is the drafting results figure that product is made in embodiment 4；And
Fig. 5 is the soldered fitting (aluminium) and basic unit (steel) interface scanning figure that product is made in embodiment 4.
Embodiment
Below in conjunction with drawings and examples, the embodiment to the present invention is described in more details, so as to energy
Enough more fully understand the solution of the present invention and the advantage of its various aspects.However, specific embodiments described below and reality
Apply the purpose that example is only explanation, rather than limitation of the present invention.
The invention discloses a kind of aluminium alloy for preparing aluminum steel composite material, its component is as shown in table 1.
The coating aluminum chemistry composition (unit of table 1：Weight %)
The invention discloses a kind of aluminum steel composite material, it is constituted by coating and basic unit are compound, and the material of the coating is
Above-mentioned aluminium alloy, the material of the basic unit is steel.
In one embodiment, the material of the basic unit is straight carbon steel.Preferably, in the material of the basic unit C weight
Amount percentage is less than 0.15% and is not zero.It is highly preferred that the material of the basic unit is 08Al steel.More preferably, the base
The component of the material of layer is as shown in table 2.
Basic unit's steel chemical composition (the unit of table 2：Weight %)
In one embodiment, the coating thickness is 80-100 μm.
The invention also discloses the complex method of above-mentioned aluminum steel composite material, the coating and the basic unit are multiple by rolling
Close and constitute the aluminum steel composite material, it typically is cold rolling or warm-rolling.Wherein, it is described cold rolling to comprise the following steps：
(1) soda acid is washed：Soda acid is carried out to coating and basic unit and washes dirty to remove；
(2) polish：Substrate surface is polished to form hardened layer；
(3) it is cold rolling compound：Coating after above-mentioned steps (1)-(2) are handled and basic unit are stacked and fixed, using list
Passage 40%-60% reduction ratio carries out cold rolling compound；
(4) diffusion annealing：The cold rolling combination product of step (3) is diffused annealing and can obtain aluminum steel of the present invention
Composite, annealing temperature is 480-520 DEG C, and soaking time is 20-28h, and atmosphere is ammonia (NH3)。
The invention discloses a kind of cooling tube bundle, the cooling tube bundle includes base tube and fin, the base tube at least one
Divide and be made up of above-mentioned aluminum steel composite material, the fin is connected with the coating of the aluminum steel composite material.
In one embodiment, the material of the fin is single aluminium alloy.
In one embodiment, the material of the fin is 3XXX line aluminium alloys.
The invention also discloses in above-mentioned cooling tube bundle, the connection method of the fin and the aluminum steel composite material is
Vacuum brazing.Because the coating of the aluminum steel composite material of the present invention is the Al-Si alloys containing Mg, it can be used as solder.And true
In empty brazing process, the Mg in coating evaporates to break oxide-film, also without brazing flux rupture of membranes.Therefore, the aluminum steel composite material can
To realize that the fin under vacuum condition with single alloy is welded, and weld strength meets the requirements, up to 50MPa.
Specifically, the connection method includes：
(a) pre-process：The fin and the aluminum steel composite material are cleaned with dilute solution of sodium hydroxide to go to degrease, and are used
With residual sodium hydroxide in 5% nitric acid alcohol, clear water is cleaned and dried；
(b) assemble：The fin after drying and the aluminum steel composite material are assembled；
(c) vacuum brazing：The fin and the aluminum steel composite material after assembling carry out vacuum brazing.
Wherein, vacuum brazing is carried out using soldering oven.Its vacuum brazing system is：Linear temperature increase 8-10min first is extremely
400-460 DEG C, 3-5min, then linear temperature increase 10-12min to 565-585 DEG C are incubated, 8-10min, last linear temperature increase 8- is incubated
10min to 605-615 DEG C, it is incubated 6-10min.
Below with reference to specific embodiment, the present invention will be described.Institute's taking technique condition value is in following embodiments
Exemplary, its desirable number range is as shown in foregoing summary.Detection method used in following embodiments is one's own profession
The conventional detection method of industry.
As shown in table 3, the chemical composition of basic unit used is as shown in table 4 for the chemical composition of coating used in following embodiments.
The embodiment 1-3 of table 3 coating chemical composition
The embodiment 1-3 of table 4 basic unit's chemical composition
Embodiment 1
The present embodiment provides a kind of aluminum steel composite material.
Preparation process is specific as follows：
(11) soda acid is washed：Soda acid is carried out for 3.25mm basic unit to coating and thickness and washes dirty to remove；
(12) polish：Substrate surface is polished to form hardened layer；
(13) it is cold rolling compound：Coating after above-mentioned steps (1)-(2) are handled and basic unit are stacked and fixed, using list
The reduction ratio of passage 40% carries out cold rolling compound；
(14) diffusion annealing：The cold rolling combination product of step (13) is diffused annealing and can obtain aluminium of the present invention
Steel composite material, annealing temperature is 480 DEG C, and soaking time is 28h, and atmosphere is ammonia.
Embodiment 2
The present embodiment provides a kind of aluminum steel composite material.
Preparation process is specific as follows：
(21) soda acid is washed：Soda acid is carried out for 3.25mm basic unit to coating and thickness and washes dirty to remove；
(22) polish：Substrate surface is polished to form hardened layer；
(23) it is cold rolling compound：Coating after above-mentioned steps (1)-(2) are handled and basic unit are stacked and fixed, using list
The reduction ratio of passage 50% carries out cold rolling compound；
(24) diffusion annealing：The cold rolling combination product of step (23) is diffused annealing and can obtain aluminium of the present invention
Steel composite material, annealing temperature is 500 DEG C, and soaking time is 26h, and atmosphere is ammonia.
Embodiment 3
The present embodiment provides a kind of aluminum steel composite material.
Preparation process is specific as follows：
(31) soda acid is washed：Soda acid is carried out for 3.25mm basic unit to coating and thickness and washes dirty to remove；
(32) polish：Substrate surface is polished to form hardened layer；
(33) it is cold compound：Coating after above-mentioned steps (1)-(2) are handled and basic unit are stacked and fixed, using single track
Secondary 60% reduction ratio carries out cold rolling compound；
(34) diffusion annealing：The cold rolling combination product of step (33) is diffused annealing and can obtain aluminium of the present invention
Steel composite material, annealing temperature is 520 DEG C, and soaking time is 20h, and atmosphere is ammonia.
Embodiment 4
The aluminum steel composite material and 3003 aluminum fin-stocks prepared present embodiment discloses embodiment 1 carries out soldering.
Specific brazing process is as follows：
(4a) is pre-processed：The fin and the aluminum steel composite material are cleaned with dilute solution of sodium hydroxide to go to degrease,
With in 5% nitric acid alcohol and residual sodium hydroxide, clear water cleans and dries；
(4b) is assembled：The fin after drying and the aluminum steel composite material are assembled；
(4c) vacuum brazing：The fin and the aluminum steel composite material after assembling are put into soldering oven and carry out vacuum pricker
Weld, its vacuum brazing system is：Linear temperature increase 10min to 460 DEG C first, 3min, then linear temperature increase 12min to 585 DEG C are incubated,
8min is incubated, last linear temperature increase 10min to 615 DEG C, 7min is incubated.
Metallographic structure and fillet weld strength evaluation, leg tissue such as Fig. 1, drafting results such as figure are carried out after soldering to products therefrom
Shown in 4, welding is good, and preferably, fin fracture rather than fin depart from aluminum steel composite material to fillet weld strength.It can be seen that, the aluminum steel is combined
Material can meet use requirement.Postwelding soldered fitting and basic unit (steel layer) scanning result are as shown in Figure 5, it is seen that aluminium after vacuum brazing
Steel interface has intermetallic compound generation, but the aluminum steel interface is similar with aluminum-plated steel Interface Microstructure, and its aluminum steel interface is close
Aluminum side has FeAl3Interphase, has Fe close to steel side2Al5Interphase.Although aluminum-plated steel interface has the presence of intermetallic compound, aluminium
Steel combination is still fine, so fillet weld strength is higher after vacuum brazing.In addition, the coating (aluminium lamination) of the aluminum steel composite material and
The interface scanning result of basic unit is also similar to Fig. 4, i.e., its aluminum steel interface is similar with aluminum-plated steel interface.
Embodiment 5
The aluminum steel composite material and 3003 aluminum fin-stocks prepared present embodiment discloses embodiment 2 carries out soldering.
Specific brazing process is as follows：
(5a) is pre-processed：The fin and the aluminum steel composite material are cleaned with dilute solution of sodium hydroxide to go to degrease,
With in 5% nitric acid alcohol and residual sodium hydroxide, clear water cleans and dries；
(5b) is assembled：The fin after drying and the aluminum steel composite material are assembled；
(5c) vacuum brazing：The fin and the aluminum steel composite material after assembling are put into soldering oven and carry out vacuum pricker
Weld, its vacuum brazing system is：Linear temperature increase 8min to 400 DEG C first, 5min, then linear temperature increase 10min to 565 DEG C are incubated,
9min is incubated, last linear temperature increase 10min to 605 DEG C, 9min is incubated.
Leg tissue such as Fig. 2 of products therefrom.
Embodiment 6
The aluminum steel composite material and 3003 aluminum fin-stocks prepared present embodiment discloses embodiment 3 carries out soldering.
Specific brazing process is as follows：
(6a) is pre-processed：The fin and the aluminum steel composite material are cleaned with dilute solution of sodium hydroxide to go to degrease,
With in 5% nitric acid alcohol and residual sodium hydroxide, clear water cleans and dries；
(6b) is assembled：The fin after drying and the aluminum steel composite material are assembled；
(6c) vacuum brazing：The fin and the aluminum steel composite material after assembling are put into soldering oven and carry out vacuum pricker
Weld, its vacuum brazing system is：Linear temperature increase 9min to 430 DEG C first, 4min, then linear temperature increase 11min to 575 DEG C are incubated,
9min is incubated, last linear temperature increase 9min to 610 DEG C, 7min is incubated.
Leg tissue such as Fig. 3 of products therefrom.
Finally it should be noted that：Obviously, above-described embodiment is only intended to clearly illustrate example of the present invention, and simultaneously
The non-restriction to embodiment.For those of ordinary skill in the field, it can also do on the basis of the above description
Go out other various forms of changes or variation.There is no necessity and possibility to exhaust all the enbodiments.And thus drawn
Among the obvious changes or variations that Shen goes out is still in protection scope of the present invention.
Claims (10)
1. a kind of aluminium alloy for preparing aluminum steel composite material, it is characterised in that its component is by weight percentage：9.0%-
10.5% Si, 1.0%-2.0% Mg, less than 0.8% Fe, less than 0.1% Mn, less than 0.25% Cu, 0.2% with
Under Zn, remaining be Al and inevitable impurity.
2. a kind of aluminum steel composite material, it is characterised in that it is constituted by coating and basic unit are compound, the material of the coating is right
It is required that aluminium alloy described in 1, the material of the basic unit is steel.
3. aluminum steel composite material according to claim 2, it is characterised in that the material of the basic unit is straight carbon steel.
4. aluminum steel composite material according to claim 3, it is characterised in that C weight percent in the material of the basic unit
Than less than 0.15% and to be not zero.
5. aluminum steel composite material according to claim 4, it is characterised in that the material of the basic unit is 08Al steel.
6. aluminum steel composite material according to claim 5, it is characterised in that the component of the material of the basic unit by weight hundred
Point ratio is：C is less than 0.1% and is not zero that Si is that less than 0.15%, Mn is that less than 0.3%, P is that less than 0.02%, S is
Less than 0.02%, remaining is Fe and inevitable impurity；Preferably, the component of the material of the basic unit is by weight percentage
For：0.007%-0.08% C, 0.012%-0.14% Si, 0.19%-0.27% Mn, 0.015%-0.02% P,
0.004%-0.02% S, remaining is Fe and inevitable impurity.
7. the aluminum steel composite material according to any one of claim 2-6, it is characterised in that the coating and the basic unit
The aluminum steel composite material is constituted by Rolling compund.
8. aluminum steel composite material according to claim 7, it is characterised in that the coating thickness is 80-100 μm.
9. a kind of cooling tube bundle, the cooling tube bundle includes base tube and fin, it is characterised in that described base tube at least a portion is
It is made up of the aluminum steel composite material any one of claim 2-8, the coating of the fin and the aluminum steel composite material
Connection.
10. cooling tube bundle according to claim 9, it is characterised in that the material of the fin is single aluminium alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710415170.XA CN107160054A (en) | 2017-06-05 | 2017-06-05 | Aluminium alloy, aluminum steel composite material and cooling tube bundle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710415170.XA CN107160054A (en) | 2017-06-05 | 2017-06-05 | Aluminium alloy, aluminum steel composite material and cooling tube bundle |
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| CN107160054A true CN107160054A (en) | 2017-09-15 |
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| CN201710415170.XA Pending CN107160054A (en) | 2017-06-05 | 2017-06-05 | Aluminium alloy, aluminum steel composite material and cooling tube bundle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108045020A (en) * | 2017-11-29 | 2018-05-18 | 银邦金属复合材料股份有限公司 | A kind of pair covers aluminum steel composite material and preparation method thereof |
| CN108116008A (en) * | 2017-11-29 | 2018-06-05 | 银邦金属复合材料股份有限公司 | A kind of aluminium composite material and preparation method thereof |
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| JP2008202133A (en) * | 2007-02-22 | 2008-09-04 | Mitsubishi Alum Co Ltd | Aluminum precoated sheet, and heat exchanger |
| CN103343267A (en) * | 2013-07-03 | 2013-10-09 | 银邦金属复合材料股份有限公司 | 4004 aluminum alloy for braze welding |
| CN103599931A (en) * | 2013-11-20 | 2014-02-26 | 银邦金属复合材料股份有限公司 | Processing technique of aluminum-clad steel pipe material |
| CN106367677A (en) * | 2016-08-26 | 2017-02-01 | 银邦金属复合材料股份有限公司 | Steel layer material of brazing composite strip and brazing aluminium-steel composite strip |
| CN106680200A (en) * | 2015-11-05 | 2017-05-17 | 银邦金属复合材料股份有限公司 | Method for detecting interface bonding strength of composite materials |
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2017
- 2017-06-05 CN CN201710415170.XA patent/CN107160054A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008202133A (en) * | 2007-02-22 | 2008-09-04 | Mitsubishi Alum Co Ltd | Aluminum precoated sheet, and heat exchanger |
| CN103343267A (en) * | 2013-07-03 | 2013-10-09 | 银邦金属复合材料股份有限公司 | 4004 aluminum alloy for braze welding |
| CN103599931A (en) * | 2013-11-20 | 2014-02-26 | 银邦金属复合材料股份有限公司 | Processing technique of aluminum-clad steel pipe material |
| CN106680200A (en) * | 2015-11-05 | 2017-05-17 | 银邦金属复合材料股份有限公司 | Method for detecting interface bonding strength of composite materials |
| CN106367677A (en) * | 2016-08-26 | 2017-02-01 | 银邦金属复合材料股份有限公司 | Steel layer material of brazing composite strip and brazing aluminium-steel composite strip |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108045020A (en) * | 2017-11-29 | 2018-05-18 | 银邦金属复合材料股份有限公司 | A kind of pair covers aluminum steel composite material and preparation method thereof |
| CN108116008A (en) * | 2017-11-29 | 2018-06-05 | 银邦金属复合材料股份有限公司 | A kind of aluminium composite material and preparation method thereof |
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Application publication date: 20170915 |