CN106563704A - Aluminum alloy plate for brazing, manufactured composite plate and preparation method - Google Patents
Aluminum alloy plate for brazing, manufactured composite plate and preparation method Download PDFInfo
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- CN106563704A CN106563704A CN201610963878.4A CN201610963878A CN106563704A CN 106563704 A CN106563704 A CN 106563704A CN 201610963878 A CN201610963878 A CN 201610963878A CN 106563704 A CN106563704 A CN 106563704A
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- aluminium alloy
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/02—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/38—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/38—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
- B21B2001/386—Plates
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
- Laminated Bodies (AREA)
Abstract
The invention relates to an aluminum alloy plate for brazing, a manufactured composite plate and a preparation method. The preparation method of the aluminum alloy plate for brazing comprises the homogenization treatment after a pouring step of forming the aluminum alloy plate, and is characterized in that the homogenization treatment includes pouring of an aluminum alloy ingot in a furnace and heating from room temperature to the homogenization temperature at a heating speed of 30-50 DEG C/h. The invention further provides the aluminum alloy plate prepared by the method; and the grain size of the aluminum alloy plate is 90-150 microns. The aluminum alloy plate core homogenization production process is adjusted to control the grain structure of the final finished product; and under the precondition of guaranteeing that the punching performance and the after-welding yield strength of the finished plate reach the requirements, the after-welding corrosion performance of a brazed plate is improved.
Description
Technical field
The invention mainly relates to a kind of aluminium alloy plate, more particularly to a kind of soldering aluminium alloy plate, made by composite plate with
And preparation method.
Background technology
Aluminium alloy has a rich reserves, high specific strength, the excellent properties such as heat transfer coefficient is high and easy to process, used as Heat transmission
Material is widely used in heat exchanger field.Wherein, again because its punching performance is good, yield ratio is low, plasticity for 3xxx systems Al-Mn alloys
Index is big, and thick anisotropy index is low, usually as the core of aluminium heat exchanger.
To undergo cold cycling repeatedly and periodic vibration during heat exchanger use, still suffer from from extraneous ring
Border (rainwater, sand grains, mud etc.) and the pollution of waste gas discharged by vehicles, therefore it is required that it possesses good corrosive nature.
Soldering alloy plate material is the punching performance for ensureing finished product, usually requires that grain structure fine uniform, but little
Crystal grain can occur serious corrode in brazing process, that is, the Si melted in skin material spreads along crystal boundary to core so that after corrode
Core grain boundaries have Second Phase Precipitation, it is unfavorable to the intergranular corrosion resistance of material, therefore the use longevity of plate can be shortened
Life.In addition the tiny diffusion admittance that can increase corrosion of grain structure, easily forms the corrosion pathways through whole cross section, also resists
Corrosive nature is unfavorable.
Plate in aluminum-made heat exchanger need to carry out deep-draw process, to prevent from occurring orange peel phenomenon even cracking during deep-draw,
Require the grain structure fine uniform of plate.To obtain the finished product grain structure of fine uniform, the core of plate must be carried out uniformly
Change is processed.
For 3003 alloys of heat exchanger according to the present invention, during prior art Homogenization Treatments, associated element
Diffusion have a Second Phase Precipitation, second interacts with dislocation can affect the Recrystallization nucleation of crystal grain and grow up, Jin Erying
Ring the size of crystallite dimension.Therefore difficult point is how to pass through the homogenization process of regulation and control plate, and then controls the analysis of the second phase
Go out, to realize the control of plate final finished grain structure.
For the problems referred to above, in order to guarantee that plate finished product punching performance and postwelding yield strength reach the premise of requirement
Under, improve the postwelding corrosive nature of soldering plate, need to propose a kind of new technique for being adjusted plate core production technology,
To control the grain structure of final finished, enable the plate formed by it that there is good anticorrosive shape.
The content of the invention
For the problems referred to above, the invention provides a kind of soldering aluminium alloy plate, made by composite plate and preparation method,
On the premise of guaranteeing that plate finished product punching performance and postwelding yield strength reach requirement, improve the postwelding corrosivity of soldering plate
Energy.
The invention provides a kind of preparation method of soldering aluminium alloy plate, methods described is included closes in the formation aluminum
The Homogenization Treatments carried out after the casting step of golden plate, the Homogenization Treatments include：By cast aluminum alloys ingot casting in stove with
The heating rate of 30-50 DEG C/h rises to homogenization temperature from room temperature.
Above-mentioned method, the Homogenization Treatments are to be incubated 8-14h under 570-620 DEG C of homogenization temperature.
Above-mentioned method, the Homogenization Treatments also include：The aluminium alloy cast ingot after the completion of by insulation in stove with
The rate of temperature fall of 40 ± 10 DEG C/h is down to 490 ± 20 DEG C.
Above-mentioned method, the Homogenization Treatments also include：The aluminium alloy cast ingot after by cooling is come out of the stove and is air cooled to room
Temperature.
Above-mentioned method, the aluminium alloy is 3003.
The present invention also provides a kind of aluminium alloy plate being prepared into by said method, and the crystallite dimension of the aluminium alloy plate is
90-150μm。
The present invention also provides a kind of complex method of aluminium alloy compound plate, and methods described is included to the composite board core material
Preparation method as above.
Above-mentioned method, the complex method also includes：Core and clad are compounded to form into composite plate material；After being combined
The composite plate material preheated in 450-550 DEG C of temperature, insulation 2-5h after the composite plate material is hot-rolled down to into 6-10mm；It is right
The composite plate material after hot rolling is cold-rolled to finished product thickness；The composite plate material of finished product thickness is incubated into 2- at 380 ± 20 DEG C
4h carries out finished products.
Above-mentioned method, the core is 3003 aluminium alloys, and the clad is 4 line aluminium alloys.
The present invention also provides a kind of aluminium alloy compound plate being composited using above-mentioned complex method, the aluminium alloy compound
The core crystal grain of plate is 90-150 μm.
Using technical solutions according to the invention, in the situation for guaranteeing heat exchanger plate punching performance and deposited strength
Under, by regulating and controlling core homogenization process, the grain structure of sheet material is controlled, improve the postwelding corrosive nature of aluminum alloy plate materials.
Description of the drawings
Fig. 1 is the combination process schematic flow sheet of the aluminium alloy compound plate of the embodiment of the present invention；
Fig. 2 a are the microstructure schematic diagrams of the A soldering plates of the embodiment of the present invention 1；
Fig. 2 b are the microstructure schematic diagrams of the B soldering plates of the embodiment of the present invention 1；
Fig. 2 c are the microstructure schematic diagrams of the C soldering plates of the embodiment of the present invention 1；
Fig. 3 a are 8 weeks later salt air corrosion pattern schematic diagrams of A solderings plate of the embodiment of the present invention 1；
Fig. 3 b are 8 weeks later salt air corrosion pattern schematic diagrams of B solderings plate of the embodiment of the present invention 1；
Fig. 3 c are 8 weeks later salt air corrosion pattern schematic diagrams of C solderings plate of the embodiment of the present invention 1.
Specific embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in more details, so as to energy
Enough more fully understand the advantage of the solution of the present invention and various aspects.However, specific embodiments described below and enforcement
Example is only descriptive purpose, rather than limitation of the present invention.
It should be noted that the room temperature of indication of the present invention is also referred to as room temperature.
The invention provides the preparation technology and method of a kind of strong soldering aluminium alloy plate of corrosion resistance.By to ingot casting
The regulation and control of homogenization process, control the grain structure of final finished, and then improve the corrosive nature of radiator plate postwelding.
Such as Fig. 1, the compound concrete technology flow process of the aluminium alloy plate in the present invention is as follows：
Founding to composite plate alloy：Respectively according to respective standard melting clad 4xxx and the alloy of core 3003.
Homogenization Treatments are carried out to 3003 core ingot castings：By 3003 ingot castings in the temperature rise period with the intensification speed of 30-50 DEG C/h
Rate rises to homogenization temperature from room temperature, and homogenization temperature is 570-620 DEG C (material temperature), and 8-14h is incubated under homogenization temperature, is protected
Make 3003 ingot castings be down to 490 ± 20 DEG C with the rate of temperature fall of 40 ± 10 DEG C/h in stove after the completion of temperature, then come out of the stove and be air cooled to room temperature.
It is combined to core milling face, to core and clad：By the ingot mill surface of core 3003, afterwards with 4xxx skins material by certain
Compound ratio carry out being compounded to form the composite plate of 4xxx/3003/4xxx.
To composite plate hot rolling：Plate after will be compound before hot rolling is preheated in 450-550 DEG C of temperature range, is incubated
2-5h, is hot-rolled down to 6-10mm by plate afterwards, and makes its rolling.
Method hot rolling plate is carried out cold rolling：At room temperature Jing multi-pass is cold-rolled to finished product thickness to hot rolled plate.
Compound board finished product is annealed：The cold-reduced sheet of finished product thickness is carried out into finished product in 380 ± 20 DEG C of insulation 2-4h to move back
Fire, obtains final composite plate finished product plate.
Compared with background technology, emphasis of the present invention is improved the heating rate of aluminium alloy plate Homogenization Treatments, together
When also the restriction of OK range has been made to parameters such as homogenization temperatures, during prior art Homogenization Treatments can be overcome,
Aluminium alloy plate diffusion of associated element during Homogenization Treatments has a Second Phase Precipitation, second with dislocation interaction shadow
Ring the Recrystallization nucleation of crystal grain and grow up, and then affect a difficult problem for grain size, larger grain structure can be obtained, make
The aluminium alloy plate that be prepared into of preparation method of the present invention must be adopted carries out soldering, and it welds functional, and resistance to corrosion is notable
Improve.
Embodiment 1
The invention provides the preparation technology and method of a kind of strong soldering alloy plate material of corrosion resistance, specific work
Skill flow process see the table below shown in 1.Finished product plate and postwelding performance are shown in Table 2.
The present embodiment is tested using tri- kinds of different Homogenization Treatments techniques of A, B, C, and wherein C techniques are before our company
Using technique.
Specifically homogenization process is：Temperature rise period rises to homogenization temperature with the heating rate of 30-50 DEG C/h from room temperature,
Temperature is homogenized for 570-620 DEG C (material temperature), 8-14h is incubated under homogenization temperature, after the completion of insulation in stove with 40 ± 10 DEG C/
The rate of temperature fall of h is down to 490 ± 20 DEG C, after come out of the stove and be air cooled to room temperature.
Shown in microstructure as Fig. 2 a, Fig. 2 b, Fig. 2 c of the plate after tri- kinds of PROCESS FOR TREATMENT of A, B, C.To the plate after soldering
Material carries out corrosion resistance test, and salt spray corrosion test equipment is Ascott CC450ip salt-mist corrosion testers/JCS-060.Figure
3a, 3b, 3c are the salt air corrosion pattern schematic diagram of 8 weeks later tri- kinds of PROCESS FOR TREATMENT of A, B, C and the plate after soldering.
The technological process of production of the heat exchanger composite plate material of table 1
The finished product and postwelding performance of the heat exchanger composite plate material of table 2
It should be noted that the temperature retention time of homogenization is corresponding with Homogenization Treatments temperature, Homogenization Treatments temperature is high
Then temperature retention time is short, and the low then temperature retention time of Homogenization Treatments temperature is long.
From the finished product and postwelding performance of the heat exchanger composite plate material of table 2 it can be seen that being combined after tri- kinds of PROCESS FOR TREATMENT of A, B, C
The performance of plate reaches product requirement, i.e. 0.2 >=45MPa of room temperature tensile properties σ, the convex value >=7mm of cup, postwelding yield strength σ
0.2≥45Mpa。
Jing counts this homogenization process and can control the crystallite dimension of plate finished product at 90-150 μm, it is ensured that plate finished product is rushed
On the premise of pressure performance and postwelding yield strength meet requirement, improve the postwelding corrosive nature of plate.
From the salt air corrosion shape appearance figure that Fig. 3 a, 3b, 3c are 8 weeks later tri- kinds of PROCESS FOR TREATMENT of A, B, C and the plate after soldering
Can be seen that, C sample as a comparison case there occurs corrosion failure after 8 weeks, form the etching channels through whole cross section, and
Now there is not perforated phenomenon in whole cross section in larger A, B sample of crystallite dimension, and crystallite dimension is bigger, etch pit
Depth is less, with relatively excellent corrosion resistance.
As can be seen from Table 2, the salt air corrosion of the composite plate (technique A, B) for obtaining according to Homogenization Treatments technique of the present invention
(aperture time) adopted the salt air corrosion (aperture time) of the composite plate (technique C) that original technique obtains for 8 more than 10 weeks
Week, decay resistance improves more than 20 percent, it is seen that its resistance to corrosion is significantly improved.
Embodiment 2
The invention provides the preparation technology and method of a kind of strong soldering alloy plate material of corrosion resistance, specific work
Skill flow process see the table below shown in 3.Finished product plate and postwelding performance are shown in Table 4.
The present embodiment is also adopted by the different Homogenization Treatments techniques of tri- kinds of A, B, C and is tested, wherein C techniques be our company it
The technique of front employing.
Specifically homogenization process is：Temperature rise period rises to homogenization temperature with the heating rate of 30-50 DEG C/h from room temperature,
Temperature is homogenized for 570-620 DEG C (material temperature), 8-14h is incubated under homogenization temperature, after the completion of insulation in stove with 40 ± 10 DEG C/
The rate of temperature fall of h is down to 490 ± 20 DEG C, after come out of the stove and be air cooled to room temperature.
The technological process of production of the heat exchanger composite plate material of table 3
The finished product and postwelding performance of the heat exchanger composite plate material of table 4
From the finished product and postwelding performance of the heat exchanger composite plate material of table 4 it can be seen that being combined after tri- kinds of PROCESS FOR TREATMENT of A, B, C
The performance of plate reaches product requirement, i.e. room temperature tensile properties σ0.2>=45MPa, the convex value >=7mm of cup, postwelding yield strength
σ0.2≥45Mpa。
Jing counts this homogenization process and can control the crystallite dimension of plate finished product at 90-150 μm, it is ensured that plate finished product is rushed
On the premise of pressure performance and postwelding yield strength meet requirement, the postwelding corrosive nature of plate is improved.
As can be seen from Table 4, the salt air corrosion of the composite plate (technique A, B) for obtaining according to Homogenization Treatments technique of the present invention
(aperture time) adopted the salt air corrosion (aperture time) of the composite plate (technique C) that original technique obtains for 8 more than 10 weeks
Week, decay resistance improves more than 20 percent, it is seen that its resistance to corrosion is significantly improved.
Finally it should be noted that：Obviously, above-described embodiment is only intended to clearly illustrate example of the present invention, and and
The non-restriction to embodiment.For those of ordinary skill in the field, can also do on the basis of the above description
Go out the change or variation of other multi-forms.There is no need to be exhaustive to all of embodiment.And thus drawn
Obvious change that Shen goes out or among changing still in protection scope of the present invention.
Claims (10)
1. a kind of preparation method of soldering aluminium alloy plate, methods described is included in the casting step for forming the aluminium alloy plate
The Homogenization Treatments for carrying out afterwards, it is characterised in that the Homogenization Treatments include：
Cast aluminum alloys ingot casting is risen to into homogenization temperature with the heating rate of 30-50 DEG C/h in stove from room temperature.
2. the method for claim 1, it is characterised in that the Homogenization Treatments are in 570-620 DEG C of homogenization temperature
Lower insulation 8-14h.
3. method as claimed in claim 2, it is characterised in that the Homogenization Treatments also include：
The aluminium alloy cast ingot after the completion of by insulation is down to 490 ± 20 DEG C in stove with the rate of temperature fall of 40 ± 10 DEG C/h.
4. method as claimed in claim 3, it is characterised in that the Homogenization Treatments also include：
The aluminium alloy cast ingot after by cooling is come out of the stove and is air cooled to room temperature.
5. the method as described in any one of Claims 1-4, it is characterised in that the aluminium alloy is 3003.
6. a kind of aluminium alloy plate being prepared into by claim 1 to 5 any one methods described, it is characterised in that the aluminium alloy
The crystallite dimension of plate is 90-150 μm.
7. a kind of complex method of aluminium alloy compound plate, it is characterised in that methods described is included to the composite board core material
Preparation method as described in any one of claim 1 to 5.
8. method as claimed in claim 7, it is characterised in that the complex method also includes：
Core and clad are compounded to form into composite plate material；
The composite plate material after will be compound is preheated in 450-550 DEG C of temperature, by composite plate material heat after insulation 2-5h
It is rolled to 6-10mm；
The composite plate material after to hot rolling is cold-rolled to finished product thickness；
The composite plate material of finished product thickness is incubated into 2-4h at 380 ± 20 DEG C carries out finished products.
9. method as claimed in claim 7 or 8, it is characterised in that the core is 3003 aluminium alloys, the clad is 4
Line aluminium alloy.
10. the aluminium alloy compound plate that complex method described in a kind of any one of employing claim 7 to 9 is composited, the aluminum is closed
The core crystal grain of golden composite plate is 90-150 μm.
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|---|---|---|---|
| CN201610963878.4A CN106563704A (en) | 2016-11-04 | 2016-11-04 | Aluminum alloy plate for brazing, manufactured composite plate and preparation method |
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| CN201610963878.4A CN106563704A (en) | 2016-11-04 | 2016-11-04 | Aluminum alloy plate for brazing, manufactured composite plate and preparation method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108277401A (en) * | 2018-03-08 | 2018-07-13 | 东北轻合金有限责任公司 | A kind of preparation method of soldering four layers of composite plate of honeycomb |
| CN110947762A (en) * | 2019-12-23 | 2020-04-03 | 东北轻合金有限责任公司 | Preparation method of 308 aluminum alloy three-layer composite plate for vacuum brazing |
| CN111299322A (en) * | 2020-03-16 | 2020-06-19 | 银邦金属复合材料股份有限公司 | Preparation method of brazing aluminum alloy material and brazing aluminum alloy material |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108277401A (en) * | 2018-03-08 | 2018-07-13 | 东北轻合金有限责任公司 | A kind of preparation method of soldering four layers of composite plate of honeycomb |
| CN110947762A (en) * | 2019-12-23 | 2020-04-03 | 东北轻合金有限责任公司 | Preparation method of 308 aluminum alloy three-layer composite plate for vacuum brazing |
| CN110947762B (en) * | 2019-12-23 | 2021-08-13 | 东北轻合金有限责任公司 | Preparation method of 308 aluminum alloy three-layer composite plate for vacuum brazing |
| CN111299322A (en) * | 2020-03-16 | 2020-06-19 | 银邦金属复合材料股份有限公司 | Preparation method of brazing aluminum alloy material and brazing aluminum alloy material |
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