CN106029923A - Aluminum alloy plate for can lids - Google Patents
Aluminum alloy plate for can lids Download PDFInfo
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- CN106029923A CN106029923A CN201580008711.6A CN201580008711A CN106029923A CN 106029923 A CN106029923 A CN 106029923A CN 201580008711 A CN201580008711 A CN 201580008711A CN 106029923 A CN106029923 A CN 106029923A
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- 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
- C22F1/047—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 of alloys with magnesium as the next major constituent
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
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- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Insertion Pins And Rivets (AREA)
- Metal Rolling (AREA)
Abstract
The purpose of the present invention is to provide an aluminum alloy plate for can lids, which achieves excellent rivet formability without lowering the material strength. One embodiment of the present invention provides an aluminum alloy plate for can lids, which contains 3.8-5.5% by mass of Mg, 0.1-0.5% by mass of Fe, 0.05-0.3% by mass of Si, 0.01-0.6% by mass of Mn and 0.3% by mass or less of Cu, with the balance made up of Al and unavoidable impurities, and which is characterized in that: the number density of intermetallic compounds having circle-equivalent diameters of from 10 nm to 300 nm (inclusive) is 80 compounds/[Mu]m3 or less; and the area ratio of intermetallic compounds having circle-equivalent diameters of more than 300 nm is from 0.3% to 2.0% (inclusive).
Description
Technical field
The present invention relates to cover aluminium alloy plate, particularly relate to the flat of the strength of materials and rivet formability
Weigh good drawn-can lid aluminium alloy plate.
Background technology
As the characteristic required by cover aluminium alloy plate, the formability of resistance to lid processing, resistance to can be there are
Beverage fill after intrinsic pressure compressive resistance and normal and simply for the can opening opened.
On the other hand, in recent years, from the viewpoint of cost degradation, it is desirable to cover aluminium alloy plate
Thin-walled property.But, if enabling aluminum alloy to plate thin-walled property, then the compressive resistance of cover reduces.As suppression
One of method that the compressive resistance of cover reduces, it is considered to enable aluminum alloy to self high intensity, but along with
High intensity, can produce formability and reduce such problem.Therefore, in order to make cover aluminium alloy plate
Thin-walled property, needs to make intensity improve with the balance of formability.
As in the strength of materials keeping cover aluminium alloy plate (cover Al-Mg system alloy sheets)
State under make one of technology that formability improves, carry out is the particle diameter controlling intermetallic compound,
With existence and the structure etc. controlling intermetallic compound.
Such as in patent documentation 1, describing and have a kind of cover aluminium alloy plate, it has respectively provided deposits
Be the intermetallic compound of more than a diameter of 3 μm in the visual field of diameter 50 μm population and
It is present in 0.2mm2The population of interior intermetallic compound more than a diameter of 1 μm.At patent literary composition
Offer in 2, describe and have a kind of cover aluminium alloy plate, which specify and be present in 1mm2Interior is a length of
The population of intermetallic compound more than 1 μm becomes with the rolled structure of the part in thickness of slab direction 1/4
Point.Patent documentation 3 describes and has a kind of cover aluminium alloy plate, which specify and be present in 1mm2
In the population of the intermetallic compound that diameter of equivalent circle is more than 0.7 μm and film formed after bend
Take intensity.
[look-ahead technique document]
[patent documentation]
Patent documentation 1: Japanese Laid-Open flat 05-302139 publication
Patent documentation 2: Japanese Laid-Open 2002-105574 publication
Patent documentation 3: Japanese Laid-Open 2007-277694 publication
The intermetallic of size described in patent documentation 1～3 (diameter of equivalent circle is more than 0.7 μm)
Thing becomes the starting point of crackle when rivet shapes.Therefore, as described in patent documentation 1～3, by subtracting
The intermetallic compound of this size few population in per unit area, or reduce area occupation ratio, from
And the crackle occurred when rivet shapes can be suppressed.
But, even if there is not crackle when rivet shapes, if necking down occurs, then there is staking out (ス
テ イ Network) (cover in order to draw ring is positioned on and taps the processing that rivet portion is smashed up) time split
The probability of stricture of vagina.And, in existing technology, necking down when rivet shapes can't control, and
Seek the more preferable rivet formability of suppression necking down.
Summary of the invention
The present invention its object is to, it is provided that one will not make the strength of materials reduce, and has the riveting of excellence
The cover aluminium alloy plate of nail formability.
If it is generally believed that Al-Mg system alloy deformation progress, then forming micro-strip, the development of this micro-strip and
Necking down occurs.The present inventors speculate, the starting point of micro-strip is the intermetallic compound of submicron-scale,
Little metal is wanted than the size (diameter of equivalent circle is more than 0.7 μm) being controlled by the past about size
Between compound, it is considered to control its distribution, thus suppress the generation of necking down.Based on this idea,
The result of the present inventors' experimentation repeatedly, it was found that the intermetallic compound of submicron-scale
Optimal distribution, and reached an embodiment of the invention.
That is, the cover aluminium alloy plate of an embodiment of the invention, it is characterised in that contain
Mg:3.8～5.5 mass %, Fe:0.1～0.5 mass %, Si:0.05～0.3 mass %, Mn:
Below 0.01～0.6 mass %, Cu:0.3 mass %, surplus is made up of Al and inevitable impurity,
Diameter of equivalent circle be the number density of the intermetallic compound of more than 10nm and below 300nm be 80
/μm3Hereinafter, the area occupation ratio of the diameter of equivalent circle intermetallic compound higher than 300nm is more than 0.3%
And less than 2.0%.In above-mentioned cover aluminium alloy plate, preferably diameter of equivalent circle be more than 10nm and
The number density of the intermetallic compound of below 300nm is 60/μm3Below.
It addition, drop as the strength of materials not making cover aluminium alloy plate (Al-Mg system alloy sheets)
Low, and make the means that rivet formability improves, it is considered to the solid solution brought by solid solution element concentration increase
Amount of reinforcement increases and the raising of Work Hardening Characteristic (homogeneous deformation ability).Solution strengthening and processing are hard
Change is the interaction owing to acting between dislocation and solute atoms, causes the motion of dislocation to be hampered
Hinder and produce.In aluminium alloy, between parent phase (Al) and solute atoms (Mg, Cu, Mn)
The difference of atomic radius, be generally acknowledged to dominate the size of described interaction.Mg、Cu、Mn
Big with the Atomic radiuses difference of parent phase (Al), then solution strengthening amount is big, but, if Mg and Mn increases
Adding addition, the most not only solid solution capacity increases, and crystallization thing also increases, owing to the increase of crystallization thing causes into
Shape reduces.Therefore, the present inventors are conceived to the increase of solid solution capacity of Cu, it is considered to do not make material
Intensity reduces and makes formability improve, the generation of necking down when rivet to be suppressed shapes.
That is, the cover aluminium alloy plate of another embodiment of the invention, it is characterised in that described
Aluminium alloy plate contains Mg:3.8～5.5 mass %, Fe:0.1～0.5 mass %, Si:0.05～0.3
Below quality %, Mn:0.01～0.6 mass %, Cu:0.06～0.3 mass %, surplus by Al and
Inevitably impurity is constituted, and wherein, Cu solid solution concentration is more than 0.06 mass %, and equivalent circle is straight
The area occupation ratio of the footpath intermetallic compound higher than 300nm is more than 0.3%, less than 2.0%.
Up to now lid material aluminium alloy plate, if carrying out high intensity, then rivet formability reduces,
Otherwise, in order to obtain the rivet formability of excellence, then need to make the strength of materials reduce.On the other hand,
The lid material aluminium alloy plate of the present invention, although having the high strength of materials, but the rivet with excellence becomes
Shape.According to the present invention, even if when making cover aluminium alloy plate thin-walled, beverage fill after pressure
Intensity also will not be not enough, using the teaching of the invention it is possible to provide the cover aluminium alloy that rivet formability and can opening are all excellent
Plate.
Accompanying drawing explanation
Fig. 1 is the top view of the cover being made up of aluminium alloy plate.
Fig. 2 is the profile of the indentation of the cover used when the evaluation of can opening.
Fig. 3 (a)～(c) are the summaries of the can opening Load Meter used during the evaluation of can opening
Figure.Fig. 3 (a) is the axonometric chart of can opening Load Meter.Fig. 3 (b) is can opening Load Meter
The generalized section near cover when measuring.Fig. 3 (c) is to represent on can opening Load Meter
The front schematic view in the direction of cover when cover is set.
Detailed description of the invention
Hereinafter, cover aluminium alloy plate and manufacture method thereof for the present invention are illustrated in detail.
Further, in this manual, the percentage rate (quality %) on the basis of quality, be equal to weight be
The percentage rate (weight %) of benchmark.
＜ the first embodiment ＞
Firstly, for an embodiment of the invention (hereinafter also referred to as the first embodiment)
Cover aluminium alloy plate and manufacture method thereof, be illustrated in detail.
The cover aluminium alloy plate of first embodiment of the present invention, it is characterised in that containing Mg:
3.8～5.5 mass %, Fe:0.1～0.5 mass %, Si:0.05～0.3 mass %, Mn:0.01～
Below 0.6 mass %, Cu:0.3 mass %, surplus is made up of Al and inevitable impurity, equivalent
Circular diameter be the number density of the intermetallic compound of more than 10nm and below 300nm be 80/μm3
Hereinafter, the diameter of equivalent circle area occupation ratio of intermetallic compound higher than 300nm be more than 0.3% and
Less than 2.0%.
(one-tenth of aluminium alloy is grouped into)
Mg:3.8～5.5 mass %
Mg has the effect of the intensity raising enabling aluminum alloy to plate.But, the content of Mg is less than 3.8 matter
During amount %, the intensity of aluminium alloy plate is insufficient, and compressive resistance when being configured to cover is not enough.The opposing party
Face, when the content of Mg is higher than 5.5 mass %, the intensity of aluminium alloy plate is superfluous, and rivet formability reduces.
Therefore, the content of Mg is 3.8～5.5 mass %.
Fe:0.1～0.5 mass %
Fe formed in aluminium alloy plate Al-Fe (-Mn) be, Al-Fe (-Mn)-Si system
Intermetallic compound, improves the tearable fragility in indentation portion when being configured to cover, has and make can opening carry
High effect.But, when the content of Fe is less than 0.1 mass %, the tearable fragility in indentation portion cannot carry
Height, leaves the right or normal track (during can opening crevasse crack propagation to indentation portion beyond) and the increasing of can opening power due to indentation during can opening
The draw ring caused greatly ruptures, and such can opening is bad to be susceptible to.On the other hand, the content of Fe is higher than
During 0.5 mass %, the area occupation ratio of the intermetallic compound higher than 300nm in aluminium alloy plate is than regulation
Scope big, rivet formability reduces.Therefore, the content of Fe is 0.1～0.5 mass %.
Si:0.05～0.3 mass %
Si forms Mg-Si system in aluminium alloy plate, Al-Fe (-Mn) is, Al-Fe (-
Mn)-Si series intermetallic compound, improves the tearable fragility in indentation portion when being configured to cover, tool
There is the effect making can opening improve.But, when the content of Si is less than 0.05 mass %, as Fe,
Can opening cannot improve.It addition, the raw-material amount of waste that can be used in aluminium alloy plate reduces, and aluminum
The required purity of parent metal uprises, and therefore cost increases.On the other hand, the content of Si is higher than 0.3
During quality %, the area occupation ratio of the intermetallic compound higher than 300nm in aluminium alloy plate is than the model of regulation
Enclosing big, rivet formability reduces.Therefore, the content of Si is 0.05～0.3 mass %.
Mn:0.01～0.6 mass %
Mn has the effect of the intensity raising enabling aluminum alloy to plate, and makes Al-Fe in aluminium alloy plate
-Mn system, Al-Fe-Mn-Si series intermetallic compound are formed, and improve quarter when being configured to cover
The tearable fragility in trace portion, has the effect improving can opening.But, the content of Mn is less than 0.01 matter
During amount %, can opening when can not get the strength-enhancing effect of aluminium alloy plate and be configured to cover improves effect
Really.On the other hand, the content of Mn higher than 0.6 mass % time, in aluminium alloy plate higher than 300nm
The area occupation ratio of intermetallic compound bigger than the scope of regulation, rivet formability reduces.Therefore, Mn
Content be 0.01～0.6 mass %.
Below Cu:0.3 mass %
Cu has the effect of the intensity raising enabling aluminum alloy to plate.But, the content of Cu is higher than 0.3 matter
During amount %, the intensity of aluminium alloy plate is superfluous, and rivet formability reduces.Therefore, the content of Cu is 0.3
Below quality %.
Inevitably impurity
The aluminium alloy of present embodiment, in addition to containing described adding ingredient, surplus is Al and can not
The impurity avoided.Inevitably in impurity, it is allowed to Cr is below 0.3 mass %, and Zn is in 0.3 matter
Amount below %, Ti below 0.1 mass %, Zr below 0.1 mass %, B 0.1 mass % with
Under, in other element scope below 0.05 mass % respectively.If inevitable impurity
Content in this range, does not then interfere with the characteristic of the aluminium alloy plate of present embodiment.
(intermetallic compound in aluminium alloy plate)
In aluminium alloy plate, by making diameter of equivalent circle be higher than the intermetallic compound of 300nm moderately
Distribution, it is possible to the effect obtained is, improves the tearable of indentation portion when aluminium alloy plate is configured to cover
Fragility, makes can opening improve.In the plate surface of aluminium alloy plate, diameter of equivalent circle is higher than 300nm's
When the area occupation ratio of intermetallic compound is less than 0.3%, the tearable fragility in indentation portion reduces, and can opening deteriorates.
On the other hand, on plate surface, the area occupation ratio of the diameter of equivalent circle intermetallic compound higher than 300nm is high
In 2.0% time, cause be full of cracks to occur due to intermetallic compound when rivet shapes, and easily propagate,
Formability reduces.Therefore, the area occupation ratio of the diameter of equivalent circle intermetallic compound higher than 300nm is
More than 0.3% and less than 2.0%.The upper limit of its area occupation ratio is preferably 1.0%, and lower limit is preferably 0.4%.
On the other hand, among the intermetallic compound of submicron-scale, diameter of equivalent circle be 10nm with
Upper, the intermetallic compound of below 300nm, becomes the starting point of micro-strip, this micro-strip when rivet shapes
Flourishing and become necking down.If the intermetallic that diameter of equivalent circle is more than 10nm and below 300nm
The number density of thing is higher than 80/μm3, then there is micro-strip in a large number when shaping in rivet, easily becomes flourishing,
Necking down occurs.Therefore, diameter of equivalent circle is the intermetallic compound of more than 10nm and below 300nm
Number density be 80/μm3Below.Diameter of equivalent circle is the gold of more than 10nm and below 300nm
Between genus, the number density of compound is the fewest more good, preferably 60/μm3Below.
(manufacture method of aluminium alloy plate)
The aluminium alloy plate of present embodiment, it is possible to by casting, the heat treatment that homogenizes, hot rolling, the coldest
Roll, intermediate annealing, the operation manufacture of secondary cold-rolling.Casting, the heat treatment that homogenizes, hot rolling, in
Between annealing wait among, Al-(Fe, Mn) is and Mg2The intermetallic compound of Si generates, cold
In the self annealing batched after rolling and baking application annealing, the precipitate of Al-Cu-Mg etc. generates.
The size of the precipitate generated by self annealing and baking application annealing is several nm, it is believed that will not become riveting
Crackle when nail shapes and the starting point of micro-strip.Therefore, in order to by close for the size sum of intermetallic compound
Degree and area occupation ratio control above-mentioned specific in the range of so that the can opening of excellence and intensity and rivet
The raising of the balance of formability manifests, critically important by the end of the operation of intermediate annealing.
The manufacture method of the aluminium alloy plate of present embodiment, particularly exists at the heat treatment that makes to homogenize
The on this point that the temperature range of 400 DEG C～550 DEG C keeping 1～10 hour, and it is carried out continuously 2 centres
There is on this point of annealing feature.Hereinafter, each operation is illustrated.
First, by the known semi-continuous casting method Cast aluminium alloy gold of DC casting etc..
Secondly, removed the region forming uneven tissue on ingot bar top layer by facing after, real
Execute the heat treatment that homogenizes.The heat treatment that homogenizes is little the temperature range holding 1～10 of 400～550 DEG C
Time.When the heat treatment that homogenizes is less than 400 DEG C or the retention time is little less than 1 constantly, diameter of equivalent circle is high
Less than the scope of regulation in the area occupation ratio of the intermetallic compound of 300nm, can opening reduces.It addition,
When the heat treatment temperature that homogenizes is higher than 550 DEG C, during hot rolling, there is burning.It addition, the retention time is higher than
10 little constantly, productivity ratio reduce.
Homogenize after heat treatment, do not carry out cooling down and proceeding hot rolling, preferably tie more than 300 DEG C
Bundle hot rolling.The hot rolling material made becomes recrystallized structure.
With total rolling rate 50～80% cold rolling (1 time cold rolling) described hot rolled plate.Total rolling rate is less than 50%
Time, the accumulation strain that rolling brings is not enough, and in the intermediate annealing of later process, recrystallization particle diameter becomes big,
The formability comprising rivet formability is deteriorated.On the other hand, when total rolling rate is higher than 80%, roll
Road processed number of times becomes many, and productivity ratio reduces.
Then, described cold-reduced sheet is carried out intermediate annealing and is allowed to recrystallization, and make below 300nm's
The number density of intermetallic compound reduces.This intermediate annealing is carried out continuously 2 times.Intermediate annealing for the first time
Carry out with material temperature 380 DEG C～the scope of 550 DEG C, condition within 10 minutes retention times, cold
But to after room temperature, reheat, carry out second time intermediate annealing.Intermediate annealing for the second time, with identical
Material temperature 380 DEG C～the scope of 550 DEG C, condition within 10 minutes retention times are carried out.Second
Rate of cooling after secondary intermediate annealing is 100 DEG C/more than min.The holding temperature of intermediate annealing is less than
When 380 DEG C, diameter of equivalent circle is the number density model than regulation of the intermetallic compound of 10～300nm
Enclosing big, rivet formability reduces.When keeping temperature higher than 550 DEG C, or the retention time was more than 10 minutes
Time, the effect making intermetallic compound reduce is saturated, and cost raises.It addition, the number of times of intermediate annealing
When being 1 time, or secondary rate of cooling less than 100 DEG C/min time, diameter of equivalent circle be 10～
The number density of the intermetallic compound of 300nm is bigger than the scope of regulation, and rivet formability reduces.
Then, for described annealed cold-reduced sheet, carry out the most cold rolling with total rolling rate 50～85%
(2 times cold rolling), it is possible to manufacture the aluminium alloy plate of present embodiment.Total rolling rate is less than 50%
Time, the processing hardening that rolling brings is little, and intensity reduces, and compressive resistance when being configured to cover is not enough.
On the other hand, when total rolling rate is higher than 85%, the intensity of cover aluminium alloy plate is too high, including rivet
Formability reduces in the formability of interior sheet.Therefore, total rolling rate is 50～85%.
The cover aluminium alloy plate manufactured by above operation, is implementing chromate and zirconium (ジ Le U
Application) surface that is etc. processes, the organic coating of coating epoxy system resin, vinyl chloride and Polyester etc.,
It is about 230～280 DEG C at PMT (Peak Metal Temperature: metal arrives temperature) to enter
After row baking processes, it is configured to cover.
＜ the second embodiment ＞
Then, for another embodiment of the present invention (hereinafter also referred to as the second embodiment)
Cover aluminium alloy plate and manufacture method thereof are illustrated in detail.
The cover aluminium alloy plate of second embodiment of the present invention, it is characterised in that described aluminium alloy
Plate contain Mg:3.8～5.5 mass %, Fe:0.1～0.5 mass %, Si:0.05～0.3 mass %,
Below Mn:0.01～0.6 mass %, Cu:0.06～0.3 mass %, surplus is by Al and inevitable
Impurity constitute, Cu solid solution concentration is more than 0.06 mass %, and diameter of equivalent circle is higher than 300nm
The area occupation ratio of intermetallic compound is more than 0.3% and less than 2.0%.
(one-tenth of aluminium alloy is grouped into)
In the one-tenth of the aluminium alloy of the cover aluminium alloy plate of the second embodiment is grouped into, about Mg
(3.8～5.5 mass %), Fe (0.1～0.5 mass %), Si (0.05～0.3 mass %), Mn (0.01～
0.6 mass %) and surplus (Al and inevitable impurity), the content of this each composition and control thereof
Reason is as the first embodiment, therefore in this detailed.Hereinafter, Cu is contained
Amount and control reason thereof illustrate.
Cu:0.06～0.3 mass %
Cu has the effect of the intensity raising enabling aluminum alloy to plate.It addition, by being allowed to solid solution, shape
Property also improves.But, when the content of Cu is less than 0.06 mass %, few to the solid solution capacity of parent phase, by force
Degree reduces with the balance of formability, and rivet formability cannot improve.On the other hand, the content of Cu is high
When 0.3 mass %, the intensity of aluminium alloy plate is superfluous, and rivet formability reduces.Therefore, in this reality
Executing in mode, the content of Cu is 0.06～0.30 mass %.
(Cu solid solution concentration)
If as discussed, Cu is big to the solid solution concentration of parent phase (Al), then due to the increasing of solution strengthening amount
Add and cause the strength of materials to increase, and Work Hardening Characteristic (homogeneous deformation ability) improves, it is possible to press down
The generation of necking down when rivet processed shapes.But, if Cu solid solution concentration is fewer than 0.06 mass %, then
It is not sufficiently effective.Therefore, Cu solid solution concentration is more than 0.06 mass %, preferably 0.09 mass %
Above, more than more preferably 0.12 mass %.Further, the solid solution capacity of Cu is relative to the ratio of addition
Example (Cu solid solution concentration/Cu content) is preferably more than 0.75, more preferably more than 0.87.
(intermetallic compound in aluminium alloy plate)
In aluminium alloy plate, divided by the intermetallic compound appropriateness making diameter of equivalent circle be higher than 300nm
Cloth, it is possible to the effect obtained is, improves the tearable in indentation portion when aluminium alloy plate is configured to cover
Property, make can opening improve.On the plate surface of aluminium alloy plate, the diameter of equivalent circle metal higher than 300nm
Between the area occupation ratio of compound less than 0.3% time, the tearable fragility in indentation portion reduces, and can opening deteriorates.Separately
On the one hand, on plate surface, the area occupation ratio of the diameter of equivalent circle intermetallic compound more than 300nm is higher than
When 2.0%, rivet occurs owing to intermetallic compound causes chapping when shaping, and easily propagates,
Formability reduces.Therefore, the area occupation ratio of the diameter of equivalent circle intermetallic compound higher than 300nm is
More than 0.3% and less than 2.0%.The upper limit of its area occupation ratio is preferably 1.0%, and lower limit is preferably 0.4%.
(manufacture method of aluminium alloy plate)
The aluminium alloy plate of present embodiment, by with casting, the heat treatment that homogenizes, hot rolling, 1 time cold
Roll, intermediate annealing, 2 cold rolling operation manufactures.The manufacture method of the aluminium alloy plate of present embodiment,
Particularly keep 1～10 hour protecting in the heat treatment temperature range at 400 DEG C～550 DEG C that makes to homogenize
On this point of holding, and there is on this point of being carried out continuously 2 intermediate annealing feature.Here, about
Each operation beyond the intermediate annealing of the manufacture method of the aluminium alloy of present embodiment (casts, homogenizes
Heat treatment, hot rolling, 1 time cold rolling and 2 times cold rolling), as the first embodiment, therefore, here
Detailed.Hereinafter, the intermediate annealing for the manufacture method of the aluminium alloy of present embodiment is entered
Row explanation.
In the manufacture method of present embodiment, as the first embodiment, being cast, homogenizing
Heat-transformation process, hot rolling and cold rolling (1 time cold rolling) and after obtaining cold-reduced sheet, this cold-reduced sheet is carried out
Intermediate annealing is allowed to recrystallization, and makes the solid solution concentration of Cu increase.This intermediate annealing is carried out continuously
2 times.Intermediate annealing for the first time, with material temperature 380 DEG C～the scope of 550 DEG C, retention time 10
Condition within minute is carried out, and after being cooled to room temperature, reheats and carries out second time intermediate annealing.The
Secondary intermediate annealing, equally with material temperature 380 DEG C～the scope of 550 DEG C, 10 minutes retention times
Within condition carry out.Rate of cooling after intermediate annealing is 100 DEG C/more than min for the second time.Middle
Annealing holding temperature higher than 550 DEG C time, or the retention time more than 10 minutes time, annealing operation terminates
After recrystal grain become big, the formability of sheet reduces.The holding temperature of intermediate annealing is less than
When 380 DEG C, the most within the limits prescribed, rivet formability cannot improve the solid solution concentration of Cu.It addition,
When the number of times of intermediate annealing is 1 time, or when second time rate of cooling is less than 100 DEG C/min, Cu consolidates
The most within the limits prescribed, rivet formability cannot improve molten concentration.
Then, for the cold-reduced sheet through described annealing, as the first embodiment, always rolling rate is made
Be 50～85% and carry out cold rolling (2 times cold rolling) once again such that it is able to manufacture present embodiment aluminum close
Gold plate.
The cover aluminium alloy plate manufactured by above operation, at the table implementing chromate and zirconium system etc.
Face processes, and the organic coating of coating epoxy system resin, vinyl chloride and Polyester etc., with PMT (Peak
Metal Temperature: metal arrive temperature) be about 230～280 DEG C carry out baking process after,
It is configured to cover.
[embodiment]
Hereinafter, will confirm that the embodiment of the effect of the present invention, with the ratio of the important document being unsatisfactory for the present invention
Relatively example carries out contrasting and being specifically illustrated.Further, the present invention is not limited by this embodiment.
(embodiment of the first embodiment)
With the aluminium alloy (in addition to No.32) shown in semi-continuous casting method (DC) casting table 1, right
Carry out facing in ingot bar top layer, make slab.Implement to homogenize after heat treatment to this slab,
Carry out hot rolling and become hot rolled plate, for this hot rolled plate, carry out successively 1 time cold rolling (rolling rate 70%),
Intermediate annealing, 2 times cold rolling (rolling rate 79%), make the cover aluminium alloy of thickness of slab 0.215mm
Plate.Wherein, the aluminium alloy of No.33 after hot rolling, is only carried out 1 time cold rolling (rolling rate 93%), no
Carry out intermediate annealing.It addition, the aluminium alloy of No.32, in order to simulate the invention of patent documentation 1 and with
Continuous casting process (CC) casts, and continuous cast sheet is not implemented the process that homogenizes, carries out successively
1 time cold rolling (rolling rate 70%), intermediate annealing, 2 times cold rolling (rolling rate 79%), make thickness of slab
The cover aluminium alloy plate of 0.215mm.Homogenize heat treatment and intermediate annealing condition shows at table 1,2
In.
[table 1]
[table 2]
With the aluminium alloy plate of manufactured No.1～33 for confession examination material, by the main points of the following stated, survey
Amount diameter of equivalent circle is the number density of the intermetallic compound of more than 10nm and below 300nm, equivalent
The area occupation ratio of the circular diameter intermetallic compound higher than 300nm, 0.2% yield strength, rivet shapes
Property and can opening load.Its result shows in table 2.
The number density of intermetallic compound of 10nm～300nm (diameter of equivalent circle be)
The surface of mechanical lapping aluminium alloy plate, after reaching thickness 0.1mm, with double jet type electrolytic polishing method
Form the thin film of thick 100nm, for this thin film with transmission electron microscope (TEM), with 50
4 visuals field of ten thousand times of shootings.Only intermetallic compound is transferred on transparent film from photographs,
By image analysis software Image-Pro Plus, the quantity of the intermetallic compound in the range of metric photography
With each particle area, described particle area trying to achieve diameter of equivalent circle, trying to achieve diameter of equivalent circle is
The number density of the particle of more than 10nm and below 300nm.
(area occupation ratio of the diameter of equivalent circle intermetallic compound higher than 300nm)
Polished grinding enables aluminum alloy to the rolling direction parallel cut of plate becomes minute surface, at this mirror-polishing
On face, with scanning electron microscope (SEM), with accelerating potential 15kV shooting multiplying power 500 times
Composition (adds up to area 0.75mm as (COMPO picture) 20 visuals field2Above).At this composition picture
Among, the particle obtained with the contrast whiter than parent phase be considered as Al-Fe (-Mn) be, Al-Fe
(-Mn)-Si series intermetallic compound, is considered as Mg-Si with the particle that black contrast obtains
Series intermetallic compound.According to this composition picture, calculate diameter of equivalent circle by image procossing and be higher than
The area occupation ratio (relative to the percentage rate of shooting area) of the intermetallic compound of 300nm.
(0.2% yield strength)
For aluminium alloy plate, implement carried out by oil bath 255 DEG C × the 20 of simulation coating baking operation
After the heat treatment of second, make draw direction parallel with rolling direction and make JIS-5 tension test sheet.
Use this test film, carry out tension test according to JIS-Z2241, try to achieve 0.2% yield strength.0.2%
The proper range of yield strength is more than 300MPa, if in this scope, even if the tank of then thin-walled property
Lid still meets compressive resistance.
(rivet formability)
Rivet forming process, is made up of following operation: make the film bubble forming process that cover central part swells；
While making bulging portion (film bubble) undergauge with 1～3 operations while making the button of projection drastically
Forming process；After projection (button) upper assembling draw ring, crush described projection and rivet the staking out of draw ring
Operation.For normally fixed pull ring, therefore, to assure that the size of the rivet diameter after staking out, therefore,
Projection (button) after requirement can make button forming process terminate highly forms to obtain the conjunction of sufficiently high aluminum
Gold plate.
Here, to simulate the test evaluation rivet formability of film bubble operation.That is, for aluminium alloy plate,
After implementing the heat treatment being carried out 255 DEG C × 20 seconds by oil bath of simulation coating baking operation, carry out
Micro-bulging test of φ 6mm, tries to achieve the limit bulging height that necking down and crackle do not occur.Limit bulging
The proper range of height is more than 1.45mm.If the limit bulging height of aluminium alloy plate is 1.45mm
Above, then the button of fully height is shaped when can actual shape.
(can opening load)
For aluminium alloy plate, implement carried out by oil bath 255 DEG C × the 20 of simulation coating baking operation
After the heat treatment of second, with 204 diameter full foam terminal mould (204 footpath Off Le Off ォ system エ
Application De metal type) carry out housing molding, conversion shapes, after the staking out of draw ring, carry out can opening test.Figure
1 is the top view of the cover for can opening test.Fig. 2 is the indentation 3 of the cover for can opening test
Profile.Fig. 3 (a)～(c) are the general of the can opening Load Meter of load during measurement can opening
Scheme.Fig. 3 (a) is the axonometric chart of can opening Load Meter 5.Fig. 3 (b) is that can opening load is surveyed
Generalized section near the amount instrument 5 cover 1 when measuring.Fig. 3 (c) is at can opening load measurement
The front schematic view in the direction representing cover 1 when cover 1 is set on instrument 5.For cover 1, phase
Make draw ring 4 above for indentation 3, cover 1 is so set on can opening Load Meter 5
(Fig. 3 (c)).The draw ring 4 of cover 1 blocks the locking member 6 that hangs tag, as engaging portion 7 (Fig. 3 (b)).
Engagement device 6 is stretched in the horizontal direction, the tensile load of load 3N, make engagement device in this case
After 6 is static, cover 1 is made to rotate in X direction.Load is measured, by crest with force cell
As can opening load.The proper range of can opening load is at below 25N.Further, try at described micro-bulging
In testing, about the limit bulging height aluminium alloy less than 1.45mm, owing to can not get the projection needed
(button) height and can not normal mounting draw ring, so not measuring the test of can opening load.
As shown in table 1,2, become be grouped into, diameter of equivalent circle be 10nm～300nm metal between change
The number density of compound (hereinafter referred to as the number density of intermetallic compound of 10nm～300nm) and
The area occupation ratio of the diameter of equivalent circle intermetallic compound higher than 300nm is (hereinafter referred to as higher than 300nm
The area occupation ratio of intermetallic compound) No.1～17 in the prescribed limit of the first embodiment is (real
Execute example), 0.2% yield strength and can opening load are suitable, and rivet has excellent formability.Therefore, No.1～
The aluminium alloy plate of 17, although wall thickness is as thin as 0.215mm, but can be suitable as drawn-can lid purposes and make
With.
On the other hand, in No.18～33 (comparative example), one-tenth is grouped into, the gold of 10nm～300nm
The number density of compound and any one of area occupation ratio of intermetallic compound higher than 300nm between genus
Not in the prescribed limit of the first embodiment, as following, 0.2% yield strength, can opening load and riveting
The a certain item of nail formability is unsatisfactory for adequate value.
No.18 is because Mg content is not enough, so 0.2% yield strength is low, No.19 is because Mg contains
Amount surplus, so rivet formability is poor.
No.20 is because Fe content is not enough, so the area occupation ratio of the intermetallic compound higher than 300nm
Little, can opening load is big.No.21 is because Fe content is superfluous, so changing between the metal higher than 300nm
The area occupation ratio of compound is big, and rivet formability is poor.
No.22 is because Si content is not enough, so the area occupation ratio of the intermetallic compound higher than 300nm is little
Can opening load is big.No.23 is superfluous because of Si content, so the intermetallic compound higher than 300nm
Area occupation ratio is big, and rivet formability is poor.
No.24 is because Mn content is not enough, so 0.2% yield strength is low, higher than the metal of 300nm
Between the area occupation ratio little can opening load of compound big.No.25 is because Mn content is superfluous, so being higher than
The area occupation ratio of the intermetallic compound of 300nm is big, and rivet formability is poor.
No.26 is because Cu content is superfluous, so rivet formability is poor.
No.27 is because the holding temperature of intermediate annealing is low, so the intermetallic of 10nm～300nm
The number density of thing is high, and rivet formability is poor.No.28 is because of the rate of cooling after second time intermediate annealing
Little, so the number density of the intermetallic compound of 10nm～300nm is high, rivet formability is poor.No.29
Because intermediate annealing only has 1 time, so the number density of the intermetallic compound of 10nm～300nm is high,
Rivet formability is poor.
No.30 is because the holding temperature processed that homogenizes is low, so the intermetallic higher than 300nm
The area occupation ratio of thing is little, and can opening load is big.No.31 is short because of the retention time processed that homogenizes, so
The area occupation ratio little can opening load of the intermetallic compound higher than 300nm is big.No.32 is not because carrying out
Homogenize process, so the area occupation ratio of the intermetallic compound higher than 300nm is little, can opening load is big.
No.33 is not because carry out intermediate annealing, so the intermetallic compound of 10nm～300nm
Number density is high, and rivet formability is poor.
(embodiment of the second embodiment)
With the aluminium alloy (in addition to No.60) shown in semi-continuous casting method (DC) casting table 3, right
Carry out facing in ingot bar top layer and make slab.The enforcement of this slab is homogenized after heat treatment, enter
Row hot rolling and become hot rolled plate, to this hot rolled plate, carry out successively 1 time cold rolling (rolling rate 70%),
Intermediate annealing, 2 times cold rolling (rolling rate 79%), make the cover aluminium alloy of thickness of slab 0.215mm
Plate.It addition, the aluminium alloy of No.60, in order to simulate the invention of patent documentation 1 and with continuous casting process
(CC) casting, does not implements, for continuous cast sheet, the process that homogenizes, and carries out 1 time successively and cold rolling (roll
Rate 70% processed), intermediate annealing, 2 times cold rolling (rolling rate 79%), make thickness of slab 0.215mm tank
Lid aluminium alloy plate.Homogenize heat treatment and intermediate annealing condition shows in table 3,4.
[table 3]
[table 4]
Material is tried as confession using the aluminium alloy plate of manufactured No.34～66, by main points shown below,
Measure the solid solution concentration of Cu, diameter of equivalent circle higher than 300nm intermetallic compound area occupation ratio,
0.2% yield strength, rivet formability and can opening load.Its result shows in table 4.
(Cu solid solution concentration)
After decomposing aluminium alloy plate with phenol, use the filter in 0.1 μm hole to filter, filtrate is led
Enter in ICP (Inductively Coupled Plasma) emission spectrophotometer, only will be with nebulizer
It is allowed to spray in plasma in vaporific tiny spraying, measures the solid solution concentration of Cu.Further,
It is even if filtrate comprises the precipitate less than 0.1 μm, also analyzed not as big mist when becoming vaporific,
But be discharged, therefore assay value does not the most comprise the precipitate less than 0.1 μm.
(diameter of equivalent circle higher than the area occupation ratio of intermetallic compound of 300nm, 0.2% yield strength,
Rivet formability and can opening load)
Strong higher than the area occupation ratio of intermetallic compound of 300nm, 0.2% surrender about diameter of equivalent circle
Degree, rivet formability and can opening load, measure as No.1～33.
As shown in Table 3, 4, become to be grouped into, the solid solution concentration of Cu and diameter of equivalent circle be higher than 300nm
The area occupation ratio (area hereinafter referred to as the intermetallic compound higher than 300nm of intermetallic compound
Rate) No.34～49 (embodiment) in the prescribed limit of the second embodiment, 0.2% yield strength
Suitable with can opening load, rivet has excellent formability.Therefore, the aluminium alloy plate of No.34～49, although
Wall thickness is as thin as 0.215mm, but can be suitable for and use into drawn-can lid.
On the other hand, in No.50～66 (comparative example), become be grouped into, the solid solution concentration of Cu and
Any one of the area occupation ratio of the intermetallic compound higher than 300nm is not or not the rule of the second embodiment
In the range of Ding, as following, a certain item of 0.2% yield strength, can opening load and rivet formability is discontented with
Foot adequate value.
No.50 is because Mg content is superfluous, so rivet formability is poor, No.51 is because of Mg content not
Foot, so 0.2% yield strength is low.
No.52 is because Fe content is superfluous, so the area occupation ratio of the intermetallic compound higher than 300nm
Greatly, rivet formability is poor, and No.53 is because Fe content is not enough, so being higher than between the metal of 300nm
The area occupation ratio of compound is little, and can opening load is big.
No.54 is because Si content is superfluous, so the area occupation ratio of the intermetallic compound higher than 300nm
Greatly, rivet formability is poor, and No.55 is because Si content is not enough, so changing between the metal higher than 300nm
The area occupation ratio of compound is little, and can opening load is big.
No.56 is because Mn content is superfluous, so the area occupation ratio of the intermetallic compound higher than 300nm
Greatly, rivet formability is poor, and No.57 is because Mn content is not enough, so 0.2% yield strength is low, high
Little in the area occupation ratio of the intermetallic compound of 300nm, can opening load is big.
No.58 is because Cu content is superfluous, so rivet formability is poor, No.59 is because of Cu content not
Foot, so the solid solution concentration of Cu is low, rivet formability is poor.
No.60 is not because carrying out homogenizing heat treatment, so the intermetallic compound higher than 300nm
Area occupation ratio little, can opening load is big.No.61 is low because of the holding temperature processed that homogenizes, thus high
Little in the area occupation ratio of the intermetallic compound of 300nm, can opening load is big.No.62 is because homogenizing place
The retention time of reason is short, so the area occupation ratio of the intermetallic compound higher than 300nm is little, and can opening load
Greatly.
No.63 is because the holding temperature of intermediate annealing is low, so the solid solution concentration of Cu does not increases, and riveting
Nail formability is poor.No.64,65 because intermediate annealing only have 1 time, so the solid solution concentration of Cu is not
Increasing, rivet formability is poor.No.66 is little because of the rate of cooling after second time intermediate annealing, so
The solid solution concentration of Cu is low, and rivet formability is poor.
It is described in detail by the present invention with reference to specific mode, but without departing from the spirit and scope of the present invention
And various changes and modifications can be carried out, this ties and will be apparent from for practitioner.
Further, the application is based in Japanese patent application (patent Shen filed in 18 days February in 2014
Please 2014-028184) and in Japanese patent application (patent application filed in 18 days February in 2014
2014-028185), it is quoted entirely through quoting.
[explanation of symbol]
1 cover
2 rivet portions
3 indentations
4 draw rings
5 can opening Load Meters
6 engagement devices
7 engaging portions
Claims (3)
1. a cover aluminium alloy plate, it is characterised in that described aluminium alloy plate contain Mg:3.8～
5.5 mass %, Fe:0.1～0.5 mass %, Si:0.05～0.3 mass %, Mn:0.01～0.6
Below quality %, Cu:0.3 mass %, surplus is made up of Al and inevitable impurity, wherein,
Diameter of equivalent circle be the number density of the intermetallic compound of more than 10nm and below 300nm be 80
/μm3Hereinafter, the area occupation ratio of the diameter of equivalent circle intermetallic compound higher than 300nm is more than 0.3%
And less than 2.0%.
Cover aluminium alloy plate the most according to claim 1, it is characterised in that equivalent circle is straight
Footpath be the number density of the intermetallic compound of more than 10nm and below 300nm be 60/μm3Below.
3. a cover aluminium alloy plate, it is characterised in that described aluminium alloy plate contain Mg:3.8～
5.5 mass %, Fe:0.1～0.5 mass %, Si:0.05～0.3 mass %, Mn:0.01～0.6
Below quality %, Cu:0.06～0.3 mass %, surplus is made up of Al and inevitable impurity, Cu
Solid solution concentration is more than 0.06 mass %, the diameter of equivalent circle intermetallic compound higher than 300nm
Area occupation ratio is more than 0.3% and less than 2.0%.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014-028184 | 2014-02-18 | ||
| JP2014028185A JP6289153B2 (en) | 2014-02-18 | 2014-02-18 | Aluminum alloy plate for can lid |
| JP2014-028185 | 2014-02-18 | ||
| JP2014028184A JP6289152B2 (en) | 2014-02-18 | 2014-02-18 | Aluminum alloy plate for can lid |
| PCT/JP2015/054340 WO2015125791A1 (en) | 2014-02-18 | 2015-02-17 | Aluminum alloy plate for can lids |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106029923A true CN106029923A (en) | 2016-10-12 |
| CN106029923B CN106029923B (en) | 2017-11-24 |
Family
ID=53878292
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201580008711.6A Expired - Fee Related CN106029923B (en) | 2014-02-18 | 2015-02-17 | Cover aluminium alloy plate |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN106029923B (en) |
| WO (1) | WO2015125791A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016063876A1 (en) * | 2014-10-20 | 2016-04-28 | 株式会社神戸製鋼所 | Aluminium alloy sheet for can lid |
| JP2017075354A (en) * | 2015-10-14 | 2017-04-20 | 株式会社神戸製鋼所 | Aluminum alloy sheet for can-top |
| JP2019026876A (en) * | 2017-07-26 | 2019-02-21 | 株式会社Uacj | Aluminum alloy sheet and method for producing the same |
| JP2019065316A (en) * | 2017-09-28 | 2019-04-25 | 株式会社Uacj | Aluminum alloy sheet for can end and manufacturing method therefor |
| WO2023066892A1 (en) * | 2021-10-18 | 2023-04-27 | Speira Gmbh | Aluminum alloy and aluminum strip for producing can lids, and method for the production thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01301831A (en) * | 1988-05-31 | 1989-12-06 | Kobe Steel Ltd | Al alloy plate for stay-on tab and its manufacture |
| JP2004124250A (en) * | 2002-03-28 | 2004-04-22 | Kobe Steel Ltd | Aluminium alloy sheet for bottle can, and method for manufacturing the same |
| JP2006077283A (en) * | 2004-09-08 | 2006-03-23 | Kobe Steel Ltd | Aluminum alloy sheet for resin-covered packing container and its production method |
| CN102453821A (en) * | 2010-10-19 | 2012-05-16 | 株式会社神户制钢所 | Aluminum alloy board |
| CN103140593A (en) * | 2010-09-30 | 2013-06-05 | 株式会社神户制钢所 | Cold-rolled aluminum alloy sheet for bottle can |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09268341A (en) * | 1996-04-01 | 1997-10-14 | Furukawa Electric Co Ltd:The | Baking-coated al alloy sheet for can lid material, excellent in stress corrosion cracking resistance in score part, and its production |
| JP2001303164A (en) * | 2000-04-24 | 2001-10-31 | Sky Alum Co Ltd | Aluminum hard sheet for can cover and its producing method |
| JP3694859B2 (en) * | 2000-09-29 | 2005-09-14 | 古河スカイ株式会社 | Aluminum alloy hard plate for can lid and manufacturing method thereof |
| JP2007023340A (en) * | 2005-07-15 | 2007-02-01 | Sumitomo Light Metal Ind Ltd | Aluminum alloy sheet for positive-pressure can top, and method for producing the same |
| JP5356359B2 (en) * | 2010-11-26 | 2013-12-04 | 住友軽金属工業株式会社 | Aluminum alloy coated plate for positive pressure can lid and manufacturing method thereof |
-
2015
- 2015-02-17 CN CN201580008711.6A patent/CN106029923B/en not_active Expired - Fee Related
- 2015-02-17 WO PCT/JP2015/054340 patent/WO2015125791A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01301831A (en) * | 1988-05-31 | 1989-12-06 | Kobe Steel Ltd | Al alloy plate for stay-on tab and its manufacture |
| JP2004124250A (en) * | 2002-03-28 | 2004-04-22 | Kobe Steel Ltd | Aluminium alloy sheet for bottle can, and method for manufacturing the same |
| JP2006077283A (en) * | 2004-09-08 | 2006-03-23 | Kobe Steel Ltd | Aluminum alloy sheet for resin-covered packing container and its production method |
| CN103140593A (en) * | 2010-09-30 | 2013-06-05 | 株式会社神户制钢所 | Cold-rolled aluminum alloy sheet for bottle can |
| CN102453821A (en) * | 2010-10-19 | 2012-05-16 | 株式会社神户制钢所 | Aluminum alloy board |
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| Publication number | Publication date |
|---|---|
| WO2015125791A1 (en) | 2015-08-27 |
| CN106029923B (en) | 2017-11-24 |
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