CN103882269B - A kind of aluminum alloy materials for high temperature resistant brazed aluminum/steel composite band and application - Google Patents
A kind of aluminum alloy materials for high temperature resistant brazed aluminum/steel composite band and application Download PDFInfo
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- CN103882269B CN103882269B CN201410112213.3A CN201410112213A CN103882269B CN 103882269 B CN103882269 B CN 103882269B CN 201410112213 A CN201410112213 A CN 201410112213A CN 103882269 B CN103882269 B CN 103882269B
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Abstract
A kind of aluminum alloy materials for high temperature resistant brazed aluminum/steel composite band and application, belong to technical field of alloy material.For adding percentage by weight at the aluminum substrate containing 0.76% ± 0.10%Si it is: the Er of 0.055～0.10%.Alloy prepared by the present invention and steel recombination energy effectively solve common 1050 problems that alloy production aluminum/steel composite band boundary strength is low.Al-Si-Er/ steel composite band can be used for high temperature resistant soldering application, and interface does not produce brittle intermetallic thing.
Description
Technical field
The present invention relates to the aluminium alloy of a kind of aluminum/steel composite band for processing high temperature resistant soldering and preparation technology thereof, belong to technical field of alloy material.
Technical background
It is currently used for alloy matrix aluminum more employing 1050 aluminium alloy of processing aluminum/steel composite band.It has drawbacks in that when 1050 common aluminium alloys and steel band carry out compound, at high temperature soldering process, aluminum/steel compound interface is easily generated Fe-Al frangible compounds, thus reducing the boundary strength of aluminum/steel composite band.1050 alloy matrix aluminums add the generation of interfacial brittle phase when Si can suppress low temperature.But, when temperature is higher, H.Springer, research when showing 600 DEG C, between the interface metal that the intermetallic compound that Al-5wt.%Si/ steel interfacial reaction produces produces than rafifinal/steel interfacial reaction, compound is how a lot.This is because when 600 DEG C, the alloy matrix aluminum state adding Si will change, solid-state become semi-solid, its Reaction-diffusion terms speed, now the interface of aluminum/steel composite band can produce again a large amount of Fe-Al, Fe-Al-Si phase, easily causes aluminium lamination easy to fall off and product failure.
Owing to the physical property of steel and aluminum exists very big difference, the especially difference of fusing point so that aluminum side becomes the major influence factors of interface diffusion and reaction when about 600 DEG C high temperature brazings.Therefore, alloy design is carried out for aluminium alloy side and estimate substantially to change quantity and the pattern of interface phase.Research shows, in aluminium alloy, the interpolation of Si can effectively suppress the generation of interface compound；Aluminium alloy adding micro alloying element Er etc. and can change the generation kinetics of interface compound, changing the distribution of interfacial brittle compound, thus affecting the binding ability at interface simultaneously.The comprehensive function of the microalloying of both types is estimated to obtain better interface performance.
Summary of the invention
It is an object of the invention to the method by Si, Er combined microalloying, change the quantity of mesophase spherule, pattern and existing way.Play the synergism that alloy element is mutual, prepare a kind of aluminium alloy for processing high temperature resistant brazed aluminum/steel composite band.
A kind of aluminum alloy materials for high temperature resistant brazed aluminum/steel composite band provided by the present invention, it is characterized in that aluminum substrate compound adds Er and Si, Si is inhibited to the appearance of interface compound between ferrum aluminum, and the interpolation of Er can make interface compound fragmentation, strengthens the bond strength at ferrum aluminum interface.
According to the above, the composition range of alloying element prepared by melting is (percentage by weight): the Si of 0.76% ± 0.10%；The Er of 0.055～0.10%, surplus is aluminum and inevitable impurity.
The preparation method of aluminium alloy described above, it is characterized in that, comprise the following steps: be at 790 ± 10 DEG C at smelting temperature, first aluminium ingot is melted, it is subsequently added Al-Er, Al-Si intermediate alloy, after intermediate alloy melts, hexachlorethane degasification, stirring, insulation stands a period of time, makes each elementary composition in melt carry out swage casting after being evenly distributed.
Carry out the cold rolling Combined Processing that total deformation is 60% with steel after the aluminium alloy of mentioned component is rolled into aluminium foil by the present invention, then at 520 DEG C of diffusion annealing 18h, to meet following process needs.
The present invention is simulated soldering and processes, and experiment adopts 625 DEG C of simulation solderings to process the high temperature resistant application to ensure material.By observing interface conditions, Al-Si-Er/ steel composite band of the present invention can be used for high temperature resistant soldering application, and interface does not produce brittle intermetallic thing, overcomes the problem that prior art bond strength is low.
With 1050 common alloy phase ratios, the present invention adopts a kind of aluminium alloy for processing high temperature resistant brazed aluminum/steel composite band of mentioned component proportioning, the generation of interface compound when not only can effectively suppress low temperature diffusion to react, can effectively suppress the generation of interface compound during high temperature brazing simultaneously.
Accompanying drawing explanation
Fig. 1: Al-0.78Si-0.055Er/ steel heat treatment+simulation soldering processes interface；
Fig. 2: Al-0.76Si-0.1Er/ steel heat treatment+simulation soldering processes interface；
Fig. 3: Al-0.1Er/ steel heat treatment+simulation soldering processes interface；
Fig. 4: Al-0.055Er/ steel heat treatment+simulation soldering processes interface；
Fig. 5: rafifinal/steel heat treatment+simulation soldering processes interface.
Detailed description of the invention
Below in conjunction with being that the present invention will be further described for embodiment, but the present invention is not limited to following example.
Graphite crucible melting and iron mould casting is adopted to prepare alloy cast ingot, the raw materials used intermediate alloy for fine aluminium and Al-6Er and Al-35Si.Being at 790 ± 10 DEG C at smelting temperature, first melted by aluminium ingot, be subsequently added Al-Er, Al-Si intermediate alloy, after intermediate alloy melts, hexachlorethane degasification, stirring, insulation makes each elementary composition in melt carry out swage casting after being evenly distributed after standing.It is prepared for the alloy of kind of heterogeneity, records its actual constituent by XRF, wherein the composition measurement of Si content is existed the error of about 0.1%, as shown in table 1 below.
Table 1 technic metal composition
Carry out the cold rolling Combined Processing that deflection is about 60% after the aluminium alloy of preparation is rolled into aluminium foil with steel, carry out recrystallization annealing process+simulation soldering heat treatment subsequently.After the cold rolling compound of aluminum/steel, crystal grain gross distortion, cold rolling composite plate plasticity declines, and composite band carries out 520 DEG C/18h annealing heat treatment, to meet following process needs；Experiment adopts 625 DEG C of insulation 10min to simulate soldering and processes the high temperature resistant application to ensure material.Simulation soldering heat treating regime is: the aluminum/steel band after recrystallization annealing being processed is raised to 625 DEG C in room temperature 30min, air cooling after being incubated 10min at 625 DEG C.Then interface conditions is observed again.
Embodiment 1: the Al-0.8Si-0.05Er/ steel heat treatment prepared by the aluminium alloy in A4+simulation soldering processes interface and do not observe interface compound, and interface cohesion is all right, sees Fig. 1.
Embodiment 2: Al-0.8Si-0.10Er/ steel heat treatment in A5+soldering being processed interface and does not also observe the existence of interface compound, interface cohesion is all right, sees Fig. 2.
It is also that interrupted shape exists that comparative example 1:Al-0.10Er/ steel heat treatment+simulation soldering processes interface compound, and the thickness of interface compound is less, sees Fig. 3.
It is that interrupted shape exists that comparative example 2:Al-0.05Er/ steel heat treatment+simulation soldering processes interface compound, sees Fig. 4, and the thickness of interface compound is far smaller than the rafifinal under identical heat treating regime/steel interface compound thickness.But its performance is still not as Al-Si-Er/ steel.
Comparative example 3: rafifinal/steel heat treatment+simulation soldering processes interface and occurs in that the brittle interface compound of a large amount of stratiform continuous distribution, sees Fig. 5, easily causes matrix steel band to separate with cladding aluminium strip, and the existence of interface compound is substantially reduced the bond strength at interface.
Claims (1)
1. the purposes for the aluminum alloy materials of high temperature resistant brazed aluminum/steel composite band, this kind of aluminum alloy materials carries out microalloying on the aluminium alloy basis of the Si that percentage by weight is 0.76% ± 0.10% adding, micro alloying element is Er, and the weight percentage that Er is in the alloy is: the Er of 0.055～0.10%, this kind of aluminum alloy materials aluminium alloy carries out, with steel, the cold rolling Combined Processing that total deformation is 60% after rolling into aluminium foil, again at 520 DEG C of diffusion annealing 18h, to meet following process needs, carry out 625 DEG C of solderings and process.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410112213.3A CN103882269B (en) | 2014-03-24 | 2014-03-24 | A kind of aluminum alloy materials for high temperature resistant brazed aluminum/steel composite band and application |
| PCT/CN2015/074548 WO2015144009A1 (en) | 2014-03-24 | 2015-03-19 | Aluminum alloy material used for processing aluminum/steel composite belt resistant to high-temperature brazing, and heat treatment process thereof |
| US15/270,951 US10213877B2 (en) | 2014-03-24 | 2016-09-20 | Aluminum alloy and corresponding heat treatment process applied to manufacture aluminum/steel cladding plates resistant to high temperature brazing |
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| CN201410112213.3A CN103882269B (en) | 2014-03-24 | 2014-03-24 | A kind of aluminum alloy materials for high temperature resistant brazed aluminum/steel composite band and application |
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| CN103882269A CN103882269A (en) | 2014-06-25 |
| CN103882269B true CN103882269B (en) | 2016-07-06 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2015144009A1 (en) * | 2014-03-24 | 2015-10-01 | 北京工业大学 | Aluminum alloy material used for processing aluminum/steel composite belt resistant to high-temperature brazing, and heat treatment process thereof |
| CN104962789B (en) * | 2015-05-22 | 2017-05-17 | 北京工业大学 | Aluminium alloy material used for preparing high temperature resistant brazed aluminium/steel composite sheet material prepared from aluminium-silicon brazing filler metal, and preparation method thereof |
| CN105861888B (en) * | 2016-04-17 | 2018-07-31 | 北京工业大学 | A kind of wide Si for high temperature resistant brazed aluminum/steel composite strip at split window Al-Si-Er alloys |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101722372A (en) * | 2010-01-08 | 2010-06-09 | 北京工业大学 | Welding technology of Al-Mg-Mn-Zr-Er wrought aluminum alloy plate |
| CN102019727A (en) * | 2011-01-07 | 2011-04-20 | 哈尔滨松润金属制品有限公司 | Aluminium-clad steel strip for coolers and preparation method thereof as well as steel strip and aluminium alloy strip used thereby |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101722372A (en) * | 2010-01-08 | 2010-06-09 | 北京工业大学 | Welding technology of Al-Mg-Mn-Zr-Er wrought aluminum alloy plate |
| CN102019727A (en) * | 2011-01-07 | 2011-04-20 | 哈尔滨松润金属制品有限公司 | Aluminium-clad steel strip for coolers and preparation method thereof as well as steel strip and aluminium alloy strip used thereby |
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