CN103122427A - Brazing aluminum alloy composite plate and production method thereof - Google Patents
Brazing aluminum alloy composite plate and production method thereof Download PDFInfo
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Abstract
The invention relates to core alloy of a brazing aluminum alloy composite plate, a production method thereof, the brazing aluminum alloy composite plate and a production method of the brazing aluminum alloy composite plate. The core alloy is characterized by basically not containing Cr. The brazing aluminum alloy composite plate is composed of the core alloy, brazing side alloy and waterproof side alloy thereof.
Description
Technical field
The present invention relates to a kind of two-layer above made of aluminum alloy composite board and the method for producing described made of aluminum alloy composite board.Described made of aluminum alloy composite board is a kind of high-strength brazed aluminum radiator material, is specially adapted to mainboard or the side plate of aluminium radiator, condenser.
Background technology
Aluminium alloy is widely used in car heat exchanger due to light weight and high heat conductivity, such as scatterer, condenser, vaporizer, oil cooler and side cooler etc.Car heat exchanger mainly comprises vacuum brazing and controlled atmosphere soldering mainly by method for brazing production.Usually, soldering uses Al-Si to be associated gold as solder, and brazing temperature is 600 ℃ of left and right, and this moment, solder melted fully, carried out metallurgical binding by the solder butt junction.
In recent years, along with the lightweight requirements to automobile, automobile also requires lightweight with interchanger, and then requires interchanger to carry out attenuate with Al alloy composite, and the lightweight of the reduced thickness heat exchanger of mainboard and side plate has great importance.But attenuate is had higher requirement with Al alloy composite to soldering, will satisfy the strength of materials and corrosive nature does not reduce when reducing thickness.
China's automobile radiators heat exchanger side plate and mainboard brazed aluminum alloy are by two-layer or three layers of compound sheet material at present, its core is the AA3003 alloy, and after soldering, intensity is lower, and fatigue performance is poor, easily occur the phenomenon of cracking in use procedure, cause the unfavorable conditions such as interchanger leakage.
Generally contain 7 to 12% Si in the soldering side alloy of industrial use, the Si content in the core alloy is generally lower, and generally contains the elements such as Zn or Mg in waterproof side alloy.In general, producing aluminium alloy brazing with in the process of matrix material, due to the ingot casting crop, the crop of hot rolling and cold-rolled products and back-end crop and trimming etc. can produce the waste material of 30% left and right.Wherein, the waste material of ingot casting is processed easily by remelting and is utilized, and the waste material of the crop end of hot rolling and cold-rolled products and trimming is difficult to re-use production aluminium soldering matrix material.These waste materials generally contain higher alloying element, and composition is as shown in the table, and especially the content of Si is very high.How better these waste materials of recycle, be very important to saving cost and energy consumption.
The composition range of aluminium alloy scrap (% by weight)
| Si | Fe | Cu | Mn | Mg | Zr | Zn | Ti | Al |
| 0.8-2.3 | 0.1-0.5 | 0.08-0.7 | 0.7-1.5 | 0.05-0.4 | 0.01-0.12 | 0.05-0.3 | 0.03-0.12 | Surplus |
The people's such as D.Sampath WO 2007/131727A1 discloses the manufacture method that Al alloy composite is used in a kind of soldering, and the raw material that wherein is used for casting core alloy comprises the brazing sheet waste material of at least 25 % by weight.Although this has saved cost, usually can damage erosion resistance and understand the amplitude that increases strength fluctuation under the soldering postcondition.In the case, the people such as D.Sampath think the use of brazing sheet waste material with a small amount of of Cr but interpolation that have a mind to combines, and this has improved the physical strength of alloy under the soldering postcondition.The addition of Cr is preferably 0.05 to 0.20 % by weight, and the amount of having a mind to add Cr is at least 0.06 % by weight more preferably.
Chinese patent application CN 101372161A discloses the aluminium alloy brazing material of a kind of five layers, and its core is that Al-Mg-Si is associated gold, between composite bed and core, the middle layer is arranged, and it is said that described material has very high strength after soldering.But this alloy mainly relies on ageing treatment to strengthen, and under the natural aging state, its intensity is not high, if and the temperature when using by interchanger is carried out timeliness, for example 80 in water tank is to 120 ℃, along with time lengthening, overaging probably occurs, and does not gain in strength and makes on the contrary its reduction.In addition, owing to being five laminated gold, compare three-layer alloy, its rate that manufactures a finished product is low and produce difficult.
The purpose of this invention is to provide and have higher-strength and the good soldering made of aluminum alloy composite board of brazing property, side plate or mainboard that it is used as for example heat exchanger.This soldering simultaneously can consume more waste material with the production of made of aluminum alloy composite board, reduce material cost and energy consumption, so it is a kind of novel aluminum alloy material of reusable edible.Another object of the present invention is to provide a kind of aluminium alloy brazing matrix material with good workability.
Summary of the invention
This purpose and advantage thereof have been realized by the present invention.
One aspect of the present invention relates to the core alloy that made of aluminum alloy composite board is used in soldering, and it consists of based on described core alloy:
0.15 to the Si of 1.2 % by weight,
0.3 to the Mn of 1.8 % by weight,
0.1 to the Fe of 0.8 % by weight,
0.1 to the Cu of 1.2 % by weight,
0.01 to the Mg of 0.5 % by weight,
The Zn of＜0.25 % by weight,
0.02 to the Ti of 0.3 % by weight,
The Zr of＜0.2 % by weight,
Single other elements of planting content≤0.05 % by weight and total content≤0.15 % by weight,
Surplus is aluminium, it is characterized in that, described core alloy is substantially free of Cr.
The present invention also relates to described soldering on the other hand with the manufacture method of the core alloy of made of aluminum alloy composite board, wherein based on the gross weight of raw material, uses the aluminium soldering alloyed scrap of at least 30 % by weight as raw material, and makes described core alloy by fusion casting.
The present invention also relates to the soldering made of aluminum alloy composite board on the other hand, and it is by core alloy, soldering side alloy and the waterproof side alloy composition of described soldering with made of aluminum alloy composite board, wherein
Based on described soldering side alloy, the consisting of of described soldering side alloy:
The Si of 5 to 12 % by weight,
The Mn of＜0.2 % by weight,
The Fe of＜0.5 % by weight,
The Cu of＜0.2 % by weight,
The Mg of＜0.25 % by weight,
The Zn of＜0.2 % by weight,
The Ti of＜0.1 % by weight,
The Zr of＜0.1 % by weight,
Single other elements of planting content≤0.05 % by weight and total content≤0.15 % by weight,
Surplus is aluminium;
Based on described waterproof side alloy, the consisting of of described waterproof side alloy:
The Si of＜0.5 % by weight,
The Mn of＜0.2 % by weight,
The Fe of＜0.5 % by weight,
The Cu of＜0.2 % by weight,
The Mg of＜0.25 % by weight,
0.5 to the Zn of 3.5 % by weight,
The Ti of＜0.2 % by weight,
The Zr of＜0.2 % by weight,
Single other elements of planting content≤0.05 % by weight and total content≤0.15 % by weight,
Surplus is aluminium.
The present invention also relates to the manufacture method that made of aluminum alloy composite board is used in described soldering at last, and it comprises the following steps:
1) make the core alloy according to the inventive method, described soldering side alloy is provided, and described waterproof side alloy is provided;
2) compound by rolling described core alloy, described soldering side alloy and the described waterproof side alloy of making.
Embodiment
One aspect of the present invention relates to the core alloy that made of aluminum alloy composite board is used in soldering, and it consists of based on described core alloy:
0.15 to the Si of 1.2 % by weight,
0.3 to the Mn of 1.8 % by weight,
0.1 to the Fe of 0.8 % by weight,
0.1 to the Cu of 1.2 % by weight,
0.01 to the Mg of 0.5 % by weight,
The Zn of＜0.25 % by weight,
0.02 to the Ti of 0.3 % by weight,
The Zr of＜0.2 % by weight,
Single other elements of planting content≤0.05 % by weight and total content≤0.15 % by weight,
Surplus is aluminium, it is characterized in that, described core alloy is substantially free of Cr.
In one embodiment of the invention, based on described core alloy, in described core alloy, Si content is 0.3 to 1.0 % by weight.
In one embodiment of the invention, based on described core alloy, in described core alloy, Mn content is 0.6 to 1.5 % by weight.
In one embodiment of the invention, based on described core alloy, in described core alloy, Mg content is 0.1 to 0.35 % by weight.
In one embodiment of the invention, based on described core alloy, in described core alloy, Fe content is 0.2 to 0.6 % by weight.
In one embodiment of the invention, based on described core alloy, in described core alloy, Cu content is 0.3 to 1.0 % by weight.
In one embodiment of the invention, based on described core alloy, in described core alloy, Zn content is＜0.10 % by weight.
In one embodiment of the invention, based on described core alloy, in described core alloy, Ti content is 0.1 to 0.2 % by weight.
In category of the present invention, described core alloy " is substantially free of Cr " and refers in the manufacturing processed of described core alloy, does not add wittingly Cr or contains the raw material of Cr, and Cr only might introduce as inevitable impurity.In the case, based on described core alloy, in described core alloy, Cr content is＜0.04 % by weight, is preferably＜0.03 % by weight more preferably＜0.02 % by weight.Described core alloy does not particularly preferably contain Cr fully.
The present invention also relates to described soldering on the other hand with the manufacture method of the core alloy of made of aluminum alloy composite board, wherein based on the gross weight of raw material, uses the aluminium soldering alloyed scrap of at least 30 % by weight as raw material, and makes described core alloy by fusion casting.
In one embodiment of the invention, described fusion casting is water-cooled semicontinuous casting method.
In one embodiment of the invention, in described fusion casting, first with aluminium soldering alloyed scrap and the fusing of technical pure aluminium ingot, sampling analysis adds alloying element according to predetermined alloy composition, makes described core alloy by casting.
In one embodiment of the invention, smelting temperature is 700 to 800 ℃, more preferably 730 to 760 ℃.
in a special embodiment of the present invention, soldering comprises water-cooled semicontinuous casting step with the manufacture method of the core alloy of made of aluminum alloy composite board, described water-cooled semicontinuous casting step comprises melting, skim, add alloying element, standing, stir, refining, skim, pour standing furnace after adjusting component into, add the agent of titanium boron again to stir, refining, skim, through online rotten the processing, degasification, filter, enter casting machine and be cast as ingot casting, wherein said fusion process comprises that the raw material that will comprise alloyed scrap and technical pure aluminium ingot adds the smelting furnace fusing, smelting temperature is 730 to 760 ℃.
In one embodiment of the invention, the addition of the described alloyed scrap of fusion process is at least 50 % by weight of raw material gross weight, is preferably at least 60 % by weight.
Use waste material can reduce the addition of alloying element when founding, reduce the consumption of fine aluminium ingot, be significantly reduced to this.As cast the alloy of 20 tons, a stove, when the waste material addition is 50%, can save about 20% cost.
The interpolation of waste material is subject to the restriction of alloy component range.The aluminium soldering material is multilayer materials, having one deck at least is the Al-Si alloy, contain very high Si in waste material, high Si content can cause alloy melting point to reduce, and the aluminium soldering material generally need to carry out soldering at 600 ℃, so the alloy that 100% waste material is produced can not be used as the core of aluminium soldering material again.If as the aluminium soldering material, the addition of waste material is general unlikely surpasses 80%.
Further aspect of the present invention also relates to the soldering made of aluminum alloy composite board, and it is by described soldering core alloy, soldering side alloy and the waterproof side alloy composition with made of aluminum alloy composite board, wherein based on described soldering side alloy, and the consisting of of described soldering side alloy:
The Si of 5 to 12 % by weight,
The Mn of＜0.2 % by weight,
The Fe of＜0.5 % by weight,
The Cu of＜0.2 % by weight,
The Mg of＜0.25 % by weight,
The Zn of＜0.2 % by weight,
The Ti of＜0.1 % by weight,
The Zr of＜0.1 % by weight,
Single other elements of planting content≤0.05 % by weight and total content≤0.15 % by weight,
Surplus is aluminium;
Based on described waterproof side alloy, the consisting of of described waterproof side alloy:
The Si of＜0.5 % by weight,
The Mn of＜0.2 % by weight,
The Fe of＜0.5 % by weight,
The Cu of＜0.2 % by weight,
The Mg of＜0.25 % by weight,
0.5 to the Zn of 3.5 % by weight,
The Ti of＜0.2 % by weight,
The Zr of＜0.2 % by weight,
Single other elements of planting content≤0.05 % by weight and total content≤0.15 % by weight,
Surplus is aluminium.
The percentage ratio that the thickness of composite bed is accounted for the material total thickness is expressed as compound ratio.For example material thickness is 1mm, and composite bed thickness is 0.1mm, and compound ratio is 10%.
In one embodiment of the invention, based on the total thickness of described soldering with made of aluminum alloy composite board, the compound ratio of described soldering side alloy is 5 to 15%.
In one embodiment of the invention, based on the total thickness of described soldering with made of aluminum alloy composite board, the compound ratio of described waterproof side alloy is 5 to 15%.
The present invention also relates to the manufacture method that made of aluminum alloy composite board is used in described soldering at last, and it comprises the following steps:
1) make the core alloy according to the inventive method, described soldering side alloy is provided, and described waterproof side alloy is provided;
2) compound by rolling described core alloy, described soldering side alloy and the described waterproof side alloy of making.
In one embodiment of the invention, described soldering is with the step 2 of the manufacture method of made of aluminum alloy composite board) comprising: sawing, mill face, compound, heating, hot rolling, cold rolling and finished products.
Unless otherwise defined, all technology used herein and scientific terminology have the identical implication of usually understanding with those skilled in the art of the invention.If the contradiction of existence is as the criterion with the definition that the application provides.
Unless otherwise indicated, all per-cent, umber, ratio etc. all are by weight herein.
The material of this paper, method and embodiment are all exemplary, and unless stated otherwise, should not be construed as restrictive.
One aspect of the present invention provides a kind of three-layer metal matrix material of aluminium alloy brazing composition board, the consisting of of described three-layer metal matrix material: the core alloy, on a side of described core compound Al-Si be associated gold brazing filler metal as the soldering side and at the compound Al-Zn series sacrificial anode alloy material of the opposite side of described core as the waterproof side.
Below describe in detail by the water-cooled semicontinuous casting and produce the method that made of aluminum alloy composite board is used in described core alloy, soldering side alloy, waterproof side alloy and soldering.
The manufacturing of core alloy
make the core aluminium ingot by water-cooled semicontinuous casting (DC casting) method, it comprises the following steps: with the raw material melting, skim, sampling analysis, add after alloying element standing according to core alloy composition of the present invention, stir, refining, skim, pour standing furnace after adjusting component into, add the agent of titanium boron again to stir, refining, skim, through online rotten the processing, degasification, filter, enter casting machine and be cast as ingot casting, wherein said raw material fusion process comprises alloyed scrap and technical pure aluminium ingot is added the smelting furnace fusing, 730 to 760 ℃ of smelting temperatures, ingot casting is of a size of 330 * 1470mm.During melting, the addition of aluminium soldering waste material is at least 30 % by weight of raw material gross weight.
Wherein based on described core alloy, the consisting of of described core alloy:
0.15 to the Si of 1.2 % by weight,
0.3 to the Mn of 1.8 % by weight,
0.1 to the Fe of 0.8 % by weight,
0.1 to the Cu of 1.2 % by weight,
0.01 to the Mg of 0.5 % by weight,
The Zn of＜0.25 % by weight,
0.02 to the Ti of 0.3 % by weight,
The Zr of＜0.2 % by weight,
Single other elements of planting content≤0.05 % by weight and total content≤0.15 % by weight, and
The aluminium of surplus.
The manufacturing of soldering side alloy
Make soldering side aluminium ingot by the water-cooled semi-continuous casting method, it comprises the following steps: the technical pure aluminium ingot is added the smelting furnace fusing, 730 to 760 ℃ of smelting temperatures, skim, sampling analysis, add standing after alloying element, stirring, refining, skim according to soldering side alloy composition of the present invention, pour standing furnace after adjusting component into, stirring, refining again, skim, enter casting machine and be cast as ingot casting, ingot casting size: 410 * 1450mm through online rotten processing, degasification, filtration.
Wherein based on described soldering side alloy, the consisting of of described soldering side alloy:
The Si of 5 to 12 % by weight,
The Mn of＜0.2 % by weight,
The Fe of＜0.5 % by weight,
The Cu of＜0.2 % by weight,
The Mg of＜0.25 % by weight,
The Zn of＜0.2 % by weight,
The Ti of＜0.1 % by weight,
The Zr of＜0.1 % by weight,
Single other elements of planting content≤0.05 % by weight and total content≤0.15 % by weight, and
The aluminium of surplus.
The manufacturing of waterproof side alloy
According to waterproof side alloy composition of the present invention, with the manufacture method manufacturing described waterproof side alloy aluminum ingot same with soldering side alloy phase.
Wherein based on described waterproof side alloy, the consisting of of described waterproof side alloy:
The Si of＜0.5 % by weight,
The Mn of＜0.2 % by weight,
The Fe of＜0.5 % by weight,
The Cu of＜0.2 % by weight,
The Mg of＜0.25 % by weight,
0.5 to the Zn of 3.5 % by weight,
The Ti of＜0.2 % by weight,
The Zr of＜0.2 % by weight,
Single other elements of planting content≤0.05 % by weight and total content≤0.15 % by weight, and
The aluminium of surplus.
The manufacturing of aluminium alloy brazing matrix material
(1) sawing
The bottom of the core alloy, soldering side and the waterproof side alloy cast ingot that as above make is amputated 300 to 500mm;
(2) homogenizing
The core alloy cast ingot was placed in the process furnace of 500 to 610 ℃ insulation 10 to 20 hours;
(3) mill face
With each mill off 5 of two sides of the core alloy cast ingot after homogenizing to 20mm; With each mill off 5 of two sides of soldering side and waterproof side alloy cast ingot to 20mm;
(4) preparation soldering side/waterproof side alloy composite plate
To mill in the process furnace that soldering side after face and waterproof side alloy cast ingot respectively be placed on 450 to 520 ℃ insulation 5 to 11 hours, and be rolled into the soldering side of specified dimension/waterproof side alloy composite plate on hot rolls;
(5) compound
With the composition board after rolling, compound with the two sides of milling the core alloy cast ingot after face, and weld end to end with argon welder;
(6) heating
The composite alloy ingot casting that welding is good was placed in the process furnace of 400 to 520 ℃ insulation 5 to 20 hours;
(7) hot rolling
The composite ingot that has heated is rolled into thickness on hot rolls be 3 to 8mm hot rolling composite sheet material;
(8) cold rolling
After cooling, hot rolled coil being rolled into thickness on cold-rolling mill is 0.8 to 2.5mm cold rolling composite sheet material;
(9) finished products
Cold rolling composite sheet material is placed on carries out finished products in annealing furnace, 200 to 360 ℃ of annealing temperatures, annealing time 1 to 3 hour.Product after annealing namely can be used as aluminium alloy brazing matrix material of the present invention.
Below interpolation reason and the interpolation scope of core, soldering side and waterproof side alloying element described.
The core alloy
Si
In the present invention, Si is a very important element.Si forms the AlFeMnSi based compound together with Fe, Mn, play the effect of dispersion-strengthened, and perhaps solid solution improves intensity by solution strengthening in matrix.In addition, by forming Mg with the Mg reaction
2The Si compound can improve intensity.The content of Si is 0.15 to 1.2% scope, if lower than 0.15, its effect is little; When surpassing 1.2%, be solid-solubilized in the eutectic phase that can form low melting point in alloy, and significantly reduce the solidus temperature of core alloy.The reduction of core fusing point can make the possibility of melting uprise.Preferred Si content is 0.3 to 1.0%.The Si of high level shows in this material can add more alloyed scrap.
Mn
Mn has and improves intensity and solderability, solidity to corrosion, and the effect that improves current potential.The content of Mn is 0.3 to 1.8%.Lower than 0.3% the time, its effect is little, when surpassing 1.8%, easily forms huge intermetallic compound in castingprocesses, makes the plastic working reduction, and preferred Mn content is 0.6 to 1.5%, and this scope can guarantee that material has stable performance.The interpolation of alloyed scrap can change the composition of intermetallic compound, for the Mn of high-content, prevents that the formation of huge Mn-Fe intermetallic compound from being very important.So Mn content should not surpass 1.8%.
Mg
Mg significantly improves the intensity of alloy, has by separating out Mg
2Si puies forward high-intensity effect.The content of Mg is 0.01 to 0.5%.Lower than 0.1% the time, its strengthening effect is little; Higher than 0.5% the time, because be easy to react with the fluoride flux that uses, soldering has adverse influence to controlled atmosphere.Preferred Mg content is 0.1 to 0.35%.
Fe
Fe is ubiquitous impurity element in aluminium alloy.The content 0.1 to 0.8% of Fe can guarantee that material has better plasticity and corrodibility performance.In order to guarantee the intensity after the material soldering, suitable Fe minimum content is 0.2%; In order to guarantee not reduce corrosive nature and plasticity, the high-content of suitable Fe is 0.7%.In order to guarantee intensity and the good balance of corrosion resistance after soldering, and utilize waste material to produce not too difficulty of alloy, preferred Fe content is 0.2 to 0.6%.
Cu
Cu improves intensity as a component of strengthening or hardening by solution strengthening in aluminium alloy, in addition, can also improve current potential by solid solution, the potential difference of increase and sacrificial anode material, fin material improves the anticorrosion ability that is produced by the sacrificial anode effect.The content of Cu is 0.1 to 1.2% scope, if lower than 0.1%, its effect is little; When surpassing 1.2%, the possibility that intergranular corrosion occurs uprises with the hot tearing tendency change of industrial size ingot casting large.In order to guarantee intensity after higher soldering, corrosion resistance and braze ability, preferred Cu content is 0.3 to 1.0%.
Zn
The addition of Zn remains in 0.25%, to avoid too high uniform corrosion susceptibility.Preferred Zn content is not more than 0.10%, with the tendency of further reduction uniform corrosion.
Ti
Ti improves alloy strength by solution strengthening, puies forward corrosion resisting property after heavy alloyed soldering.Preferred Ti content is 0.02 to 0.3%.Lower than 0.02 o'clock, can not get its effect, when surpassing 0.3%, easily form huge intermetallic compound, make the plastic working reduction, Ti content preferred 0.1 to 0.2%.
Zr
Zr can reach 0.2% as the interpolation scope of alloying element, with the intensity of further raising alloy after soldering.And, the impact that this element can some impurity elements of balance.
Soldering side alloy
Soldering side alloy is associated gold for industry Al-Si commonly used, and wherein Si content is 5 to 12%, and preferred 6 to 11%.Along with the increase of Si content, the beginning temperature of fusion (fusing point) of Al-Si alloy reduces, and liquidus temperature reduces, and guarantees can carry out soldering in lower temperature.
Waterproof side alloy
Waterproof side alloy is that Al-Zn is associated gold.The interpolation of Zn can reduce current potential, guarantees that the current potential of this alloy is lower, and forms potential difference with core, improves the erosion resistance that is produced by the sacrificial anode effect.The interpolation content of Zn is 0.5 to 3.5%, and lower than 0.5% the time, its effect is insufficient, and when surpassing 3.5%, corrosion speed accelerates, and sacrificial anode material is corroded very soon, and solidity to corrosion reduces, preferred 1.0 to 2.5%.
Embodiment
Cast core, soldering side alloy and the waterproof side alloy that will have respectively composition shown in table 1 and table 2 by DC and be prepared as the ingot casting with industrial size, then the gained ingot casting is milled face, by produce soldering side and the waterproof side composition board with specific thickness 500 ℃ of hot rollings.Wherein the comparative example B in table 1 is the AA3003 alloy, and this alloy has better plasticity and corrosion resistance nature and medium tenacity, and is better because of its over-all properties, be widely used as the core alloy of aluminium soldering material, but only used＜waste material of 10 % by weight.
According to the alloy combination shown in table 3, core and soldering side, waterproof side composition board are carried out the hot rolling calendering compound under 500 ℃, make the metal composite of 5mm.
Then with this metallic substance cold rolling be the material of final thickness of slab 1.5mm, and the air cooling of coming out of the stove after carrying out the anneal of 2 hours at 240 ℃ or 360 ℃.
Then with the above-mentioned sheet material of making as test materials, estimate according to the method shown in following, the results are shown in table 4.
(1) soldering simulation
Approximately be warming up to 600 ℃ in 1 hour from the room temperature process, and be incubated 3 minutes, at nitrogen (N
2) the lower air cooling after cooling 10 minutes of protection.
(2) sample preparation and strength test after soldering
According to the standby tension test sample of EN10002-1 standard system, gauge length is 50mm the test materials after above soldering.Place respectively and after 7 days, carried out stretching experiment in room temperature with 20mm/ minute draw speed, the intensity of test material with the room temperature placement in 4 hours.
Table 1 core composition
Table 2 soldering side and waterproof lateral element
The composition of table 3 sheet material
The performance of table 4 sheet material
Can be illustrated by table 4, even in the situation that containing element Cr not, the embodiments of the invention 1 to 5 that add alloyed scrap in the core alloy are more than the tensile strength after soldering is up to 145MPa, and these materials do not show very significantly ageing strengthening phenomenon.In contrast, the tensile strength after test materials 6 solderings as a comparison case is starkly lower than the tensile strength of embodiment of the present invention material lower than 120MPa.
In addition, sheet material alloy of the present invention have also that the ageing strengthening of not being subjected to affects than high-elongation.Although the unit elongation of sheet material alloy of the present invention lower than Comparative Examples, it will be understood by those skilled in the art that in range of application of the present invention, general unit elongation reaches 20% demand that can satisfy in the product preparation.
Claims (20)
1. soldering is with the core alloy of made of aluminum alloy composite board, and it consists of based on described core alloy:
0.15 to the Si of 1.2 % by weight,
0.3 to the Mn of 1.8 % by weight,
0.1 to the Fe of 0.8 % by weight,
0.1 to the Cu of 1.2 % by weight,
0.01 to the Mg of 0.5 % by weight,
The Zn of＜0.25 % by weight,
0.02 to the Ti of 0.3 % by weight,
The Zr of＜0.2 % by weight,
Single other elements of planting content≤0.05 % by weight and total content≤0.15 % by weight,
Surplus is aluminium, it is characterized in that, described core alloy is substantially free of Cr.
2. core alloy according to claim 1, wherein based on described core alloy, Cr content is＜0.04 % by weight.
3. core alloy according to claim 1 and 2, wherein based on described core alloy, Si content is 0.3 to 1.0 % by weight.
One of according to claim 1 to 3 described core alloy, wherein based on described core alloy, Mn content is 0.6 to 1.5 % by weight.
One of according to claim 1 to 4 described core alloy, wherein based on described core alloy, Mg content is 0.1 to 0.35 % by weight.
One of according to claim 1 to 5 described core alloy, wherein based on described core alloy, Fe content is 0.2 to 0.6 % by weight.
One of according to claim 1 to 6 described core alloy, wherein based on described core alloy, Cu content is 0.3 to 1.0 % by weight.
One of according to claim 1 to 7 described core alloy, wherein based on described core alloy, Zn content is＜0.10 % by weight.
One of according to claim 1 to 8 described core alloy, wherein based on described core alloy, Ti content is 0.1 to 0.2 % by weight.
One of according to claim 1 to 9 described core alloy manufacture method, wherein based on the gross weight of raw material, use the aluminium soldering alloyed scrap of at least 30 % by weight as raw material, and make described core alloy by fusion casting.
11. method according to claim 10 is characterized in that, the addition of described aluminium soldering alloyed scrap is at least 50 % by weight of raw material gross weight.
12. method according to claim 11 is characterized in that, the addition of described aluminium soldering alloyed scrap is at least 60 % by weight of raw material gross weight.
13. according to claim 10 to one of 12 described methods, it is characterized in that, described fusion casting is water-cooled semicontinuous casting method.
14. according to claim 10 to one of 13 described methods, it is characterized in that, in described fusion casting, first with aluminium soldering alloyed scrap and the fusing of technical pure aluminium ingot, sampling analysis adds alloying element according to predetermined alloy composition, makes described core alloy by casting.
15. method according to claim 14 is characterized in that, smelting temperature is 700 to 800 ℃.
16. method according to claim 15 is characterized in that, smelting temperature is 730 to 760 ℃.
17. the soldering made of aluminum alloy composite board, it is by one of according to claim 1 to 9 described core alloy, soldering side alloy and waterproof side alloy composition, wherein
Based on described soldering side alloy, the consisting of of described soldering side alloy:
The Si of 5 to 12 % by weight,
The Mn of＜0.2 % by weight,
The Fe of＜0.5 % by weight,
The Cu of＜0.2 % by weight,
The Mg of＜0.25 % by weight,
The Zn of＜0.2 % by weight,
The Ti of＜0.1 % by weight,
The Zr of＜0.1 % by weight,
Single other elements of planting content≤0.05 % by weight and total content≤0.15 % by weight,
Surplus is aluminium;
Based on described waterproof side alloy, the consisting of of described waterproof side alloy:
The Si of＜0.5 % by weight,
The Mn of＜0.2 % by weight,
The Fe of＜0.5 % by weight,
The Cu of＜0.2 % by weight,
The Mg of＜0.25 % by weight,
0.5 to the Zn of 3.5 % by weight,
The Ti of＜0.2 % by weight,
The Zr of＜0.2 % by weight,
Single other elements of planting content≤0.05 % by weight and total content≤0.15 % by weight,
Surplus is aluminium.
18. soldering made of aluminum alloy composite board according to claim 17 is characterized in that, based on the total thickness of described soldering with made of aluminum alloy composite board, the compound ratio of described soldering side alloy is 5 to 15%.
19. according to claim 17 or 18 soldering made of aluminum alloy composite board is characterized in that, based on the total thickness of described soldering with made of aluminum alloy composite board, the compound ratio of described waterproof side alloy is 5 to 15%.
20. the soldering according to claim 17 to one of 19 is with the manufacture method of made of aluminum alloy composite board, it comprises the following steps:
1) make the core alloy according to claim 10 to one of 16 described methods, described soldering side alloy is provided, and described waterproof side alloy is provided;
2) compound by rolling described core alloy, described soldering side alloy and the described waterproof side alloy of making.
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