CN106460106B - Used for Making Beverage Container Body aluminium alloy plate and its manufacturing method - Google Patents
Used for Making Beverage Container Body aluminium alloy plate and its manufacturing method Download PDFInfo
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- CN106460106B CN106460106B CN201580032085.4A CN201580032085A CN106460106B CN 106460106 B CN106460106 B CN 106460106B CN 201580032085 A CN201580032085 A CN 201580032085A CN 106460106 B CN106460106 B CN 106460106B
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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
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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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- 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
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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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Abstract
The invention reside in provide the Used for Making Beverage Container Body aluminium alloy plate and its manufacturing method that a kind of fold of resistance to groove is excellent and thinned mouldability is excellent.Used for Making Beverage Container Body of the invention is made of with aluminium alloy plate aluminium alloy, it is (following that the aluminium alloy contains the mass of Si:0.20~0.45 %, be denoted as " quality % "), Fe:0.35~0.60%, Cu:0.1~0.3%, Mn:0.5~1.5%, Mg:0.8~1.5%, Ti:0.1% or less, B:0.05% or less, remainder is made of Al and inevitable impurity, in answering in force-strain curve for rolling direction, work hardening rate is 1000MPa or less, also, work hardening index n value is 0.060 or more.
Description
Technical field
The present invention relates to tank bottom (bottom) molding fold of resistance to groove (chime wrinkling resistance) is excellent
Thinned mouldability in different and DI processing excellent Used for Making Beverage Container Body aluminium alloy plate and its manufacturing method.
Background technique
As the beverage being made of aluminium alloy, mostly using 2 tanks obtained as follows: to Used for Making Beverage Container Body aluminium alloy plate
Oiling is imposed, DI molding (Drawing and Ironing: drawing-is thinned) is imposed and forms tank body, trimmed, cleaned, done
Dry, outer surface and inner surface coating drying, constriction and flange processing, the flanging of beverage filling, cover is carried out to it.
Used for Making Beverage Container Body is with aluminium alloy plate by imposing hot rolling after Homogenization Treatments to aluminium alloy ingot bar, imposing as needed
Annealing carries out cold rolling then to manufacture.In general, additionally imposing the processing eventually such as cleaning, lubricating oil coating.
In recent years, due to the necessity of the cost reduction of beverage can, it is desirable that tank body is thinning (tube reducing, gauge down)
And the tube reducing of blank plate.But the tube reducing of blank plate is easy to happen the shape defect of the referred to as appearance of groove fold.
The mechanism that groove fold occurs is illustrated.It is shaped to via drawing sequence, re-drawing process and thinning process
Tank body, in re-drawing process, material increases to the influx of concave part, and the compression stress due to undergauge in circumferencial direction increases,
Become easy generation fold.It is phenomenon of buckling in the fold that concave part occurs, therefore, the plate thickness of blank plate is thinner, easier hair
Raw fold.
As a result, in order to solve this problem, in Patent Documents 1 to 3, propose by improve work hardening index n value come
Improve the technology of groove fold.
Existing technical literature
Patent document
Patent document 1: Japanese Unexamined Patent Publication 2004-300537 bulletin
Patent document 2: Japanese Unexamined Patent Publication 2006-283112 bulletin
Patent document 3: Japanese Unexamined Patent Publication 2006-291326 bulletin
The known fold of resistance to groove is improved by improving the work hardening index n value of blank plate.Add to improve
Work hardenability value n value, it is intermeshing dislocation that the usually effective reply processing such as through low-temperature annealing, which rearranges,
State, increase solute element solid solution capacity (solid solution hardening).
In patent document 1, describes and be defined as that work hardening index n value is 0.06 or more and yield strength is
290MPa or less.In patent document 2 and patent document 3, also describe regulation are as follows: with weight ratio meter Mn solid solution capacity be 0.12~
0.40%, Cu solid solution capacity is 0.07~0.2%, makes 0.1 or more maximum n value, the base of the change curve of work hardening index n value
The tensile strength of the rolling direction of flitch is 320MPa or less.
But only improve work hardening index n value by method described in document 1~3, then the tank in thinning process
The stress of sidewall portion is got higher.As a result, being easy that fracture (broken tank) occurs in pot sidewall portion, mouldability, which is thinned, to be reduced.For this purpose, in order to
Cope with being thinning for further tank body, it is desirable that the fold of resistance to groove is excellent and the excellent Used for Making Beverage Container Body use of mouldability is thinned
Aluminium alloy plate.
Summary of the invention
Problems to be solved by the invention
The present invention is in view of above the problems of the prior art, and it is an object of the present invention to provide a kind of fold of resistance to groove is excellent, simultaneously
And the excellent Used for Making Beverage Container Body aluminium alloy plate and its system of thinned mouldability (hereinafter referred to as " thinned mouldability ") in DI processing
Make method.
The method used for solving the problem
The present inventor has studied in detail the fold of resistance to groove and thinned mouldability.Itself as a result, it has been found that, by having in mind
In work hardening rate d σ/d ε, high n-value is proposed in the state of being kept lower, can take into account the fold of resistance to groove and is thinned into
Type.In addition, also being studied the broken tank in thinning process.Its result, which is found out, assigns with cold processing ratio blank plate
Processing hardening behavior when the plastic deformation that 65% tension test according to JIS Z 2241 can not assign shows and is thinned
Mouldability is closely related, it was found that drawing of the tensile strength relative to blank plate when the plastic deformation of imparting cold processing ratio 65%
The incrementss for stretching intensity are lower, can more improve thinned mouldability.
The present inventor deeper into research as a result, it has been found that, by being imposed to the aluminium alloy with regulation composition of alloy
The Homogenization Treatments of specified conditions and hot rolling can occur processing hardening phenomenon appropriate in blank plate, can take into account the pleat of resistance to groove
Wrinkle property and thinned mouldability, so as to complete the present invention.
That is, the present invention in item 1, is a kind of Used for Making Beverage Container Body aluminium alloy plate, which is characterized in that it is made of aluminium alloy, it should
Aluminium alloy contains mass %, Fe:0.35 of Si:0.20~0.45~0.60 mass %, Cu:0.10~0.30 mass %, Mn:0.50
~1.50 mass %, Mg:0.80~1.50 mass %, Ti:0.10 mass % or less, B:0.050 mass % or less, remainder
Be made of Al and inevitable impurity, in answering in force-strain curve for rolling direction, work hardening rate be 1000MPa with
Under, also, work hardening index n value is 0.060 or more.
In addition, the present invention in item 2, is in item 1, the tensile strength of the rolling direction relative to blank plate assigns phase
With the cold processing ratio 65% of rolling direction plastic deformation when above-mentioned tensile strength incrementss be 70MPa or less.
In addition, the present invention in item 3, is a kind of manufacturing method of Used for Making Beverage Container Body aluminium alloy plate, which is characterized in that tool
It is standby: the casting process of cast aluminium alloy gold, wherein the aluminium alloy contains mass %, Fe:0.35 of Si:0.20~0.45~0.60 matter
Measure mass %, Mn:0.50 of %, Cu:0.10~0.30~1.50 mass %, Mg:0.80~1.50 mass %, Ti:0.10 matter
% or less, B:0.050 mass % are measured hereinafter, remainder is made of Al and inevitable impurity；To ingot bar with 550~620
DEG C keep 1 hour or more Homogenization Treatments process；It is set as 550~600 DEG C of start temperature, 480 DEG C or more of rolling medium temperature
The hot roughing operation of degree and 480~550 DEG C of end temperature；It is set as the hot finish to gauge process of 300~380 DEG C of end temperature；With
It is set as the cold rolling process of 70~90% rolling rate.
The effect of invention
Used for Making Beverage Container Body of the invention makes work hardening rate in the load-deformation curve of rolling direction with aluminium alloy plate
1000MPa or less and work hardening index n value are 0.060 or more, have the excellent fold of resistance to groove as a result, and are thinned
Mouldability.In addition, being assigned by making to blank plate other than the feature of such work hardening rate and work hardening index n value
The incrementss of tensile strength when giving the plastic deformation of cold processing ratio 65% are 70MPa hereinafter, having superior be thinned into
Type.In addition, the manufacturing method of Used for Making Beverage Container Body aluminium alloy plate according to the present invention, by controlling Used for Making Beverage Container Body aluminium alloy plate
Manufacturing method in Homogenization Treatments and hot-rolled condition, can accurately manufacture Used for Making Beverage Container Body aluminium alloy plate.
Detailed description of the invention
Fig. 1 is the explanatory diagram for indicating to be strained the processing hardening behavior that (ε) curve obtains by stress (σ)-.
Specific embodiment
1. Used for Making Beverage Container Body aluminium alloy plate
Hereinafter, Used for Making Beverage Container Body of the invention is described in detail with aluminium alloy plate.Used for Making Beverage Container Body of the invention is closed with aluminium
Golden plate is made of the aluminium alloy with specific composition of alloy, in the load-deformation curve of rolling direction, has specific model
The work hardening rate and work hardening index n value enclosed.In addition, the incrementss of tensile strength when defined cold processing ratio are rule
It is fixed following.
1-1. aluminium alloy composition
Firstly, being said to the restriction reason of the Used for Making Beverage Container Body of the invention aluminium alloy used in aluminium alloy plate composition
It is bright.
The mass of Si:0.20~0.45 %
Si causes phase transformation in the intermetallic compound of Al-Mn-Fe system, participates in the Al- with solid lubrication effect
The formation of the intermetallic compound of Mn-Fe-Si system.Thereby, it is possible to prevent the aluminium conjunction due to lack of lubrication when molding is thinned
The problem of golden plate is adhered to mold.Si content is unable to fully obtain when being lower than 0.20 mass % (hereinafter, being simply denoted as " % ")
Effect is stated, the surface texture of tank body material deteriorates, and deadlocked problem of generating heat occurs.On the other hand, when Si content is more than 0.45%,
Al-Mn-Fe-Si series intermetallic compound is largely formed, and inhibits to recrystallize, therefore, it is impossible to obtain after hot rolling adequately
Recrystallized structure.Preferred Si content is 0.25~0.32%.
Fe:0.35~0.60%
Fe participates in the formation of the intermetallic compound of above-mentioned Al-Mn-Fe-Si system.When Fe content is lower than 0.35%, nothing
Method is sufficiently formed when molding is thinned for Al-Mn-Fe-Si system metal necessary to preventing aluminium alloy plate from adhering to mold
Between compound.On the other hand, when Fe content is more than 0.60%, since the size and amount of intermetallic compound are excessively increased, meeting
Rupture when the thinned molding due to caused by coarse intermetallic compound occurs, mouldability, which is thinned, to be reduced.Preferred Fe contains
Amount is 0.35~0.50%.
Cu:0.10~0.30%
Cu is the element for facilitating the strength of materials, in the coating baking process in tank processed, by by Al-Cu-Mg system
Precipitation-hardening caused by the generation of precipitate helps to inhibit thermal softening.When Cu content is lower than 0.10%, specified amount can not be made
Cu solid solution, also, it is unable to get the sufficient strength of materials.On the other hand, when Cu content is more than 0.30%, the strength of materials became
Therefore height is thinned mouldability and is deteriorated.Preferred Cu content is 0.18~0.25%.
Mn:0.50~1.50%
Mn facilitates the raising of intensity, and participates in the Al-Mn-Fe-Si system with the high rigidity of solid lubrication effect
The formation of intermetallic compound (α phase).The α phase is the intermetallic compound of extreme hardness, passes through solid lubrication in DI molding
Effect plays the effect for improving the surface texture of tank body material.When Mn content is lower than 0.50%, it is unable to fully obtain above-mentioned effect
Fruit.On the other hand, when Mn content is more than 1.50%, intensity becomes excessively high, and the coarse metal of Al-Mn-Fe-Si system
Between compound formed too much, therefore, it is impaired that mouldability is thinned.Preferred Mn content is 0.80~1.20%.
Mg:0.80~1.50%
Mg is improved by the intensity that the solid solution of its own facilitates tank body, facilitates the high intensity and processing hardening of bottom
The raising of property.When Mg content is lower than 0.8%, it is difficult to required intensity is sufficiently obtained, in addition, not causing in re-drawing appropriate
Therefore processing hardening becomes easy and groove fold occurs.On the other hand, when Mg content is more than 1.50%, processing hardening becomes
It is excessively high, therefore, it is impaired that mouldability is thinned.Preferred Mg content is 1.00~1.40%.
The addition of Ti and B brings the crystal grain micronized effect of ingot bar.Regulation Ti is 0.10% or less, B be 0.050% with
Under.When Ti content is more than 0.10%, the huge intermetallic compound of Al-Ti system is generated, therefore, is occurred in DI molding broken
It splits or pin hole, DI mouldability and flange formation reduces.In addition, Ti content may be 0%, and still, lower limit value, in order to have
The effect of the above-mentioned crystal grain miniaturization of effect performance, preferably 0.005%, more preferably 0.01%.On the other hand, B content is more than
When 0.050%, the huge intermetallic compound of Ti-B system is formed, is easy to happen rupture or pin hole in DI molding.In addition, B
Content may be 0%, still, lower limit value, and in order to effectively play the effect of above-mentioned crystal grain miniaturization, preferably
0.0001%, more preferably 0.0005%.
In aluminium alloy used in the present invention, as inevitable impurity, as long as Zn is 0.3% or less, Cr is
0.3% or less, Zr is 0.1% or less, V is 0.1% or less, due to not damaging effect of the invention, also allow containing.
1-2. mechanical property
Then, about Used for Making Beverage Container Body aluminium alloy plate of the invention, to adding in the load-deformation curve of rolling direction
Work hardening ratio and work hardening index n value and assign cold processing ratio 65% plastic deformation when tensile strength relative to
The incrementss of the tensile strength of blank plate are illustrated.
As described above, the reduction of mouldability is thinned in order to prevent, it is sometimes desirable to reduce stress when assigning plastic deformation.Separately
Outside, it was found by the inventors of the present invention that tensile strength when passing through the plastic deformation that will assign cold processing ratio 65% is relative to base
The incrementss of the tensile strength of flitch are suppressed to regulation hereinafter, can further improve thinned mouldability.
Then, about the fold of resistance to groove, it is known that if can be improved n value, good performance can be obtained, but find
Condition with n value in the aluminium alloy plate as described above that processing characteristics are thinned, effective.
(ε) curve, which is strained, by stress shown in FIG. 1 (σ)-qualitatively illustrates relationship described above.The present invention of Fig. 1
In material, the stress σ in thinning process is kept as lower (increasing n value) and work hardening rate d σ/d ε (slope of a curve)
Also low, therefore, the both sides of the fold of resistance to groove and thinned mouldability can be made good.In contrast, n value is high in current material,
But work hardening rate d σ/d ε high, therefore, although the fold of resistance to groove is good, mouldability, which is thinned, to be reduced.In addition, comparing
In material, although work hardening rate d σ/d ε is low, the stress σ high in thinning process, therefore, n value are reduced, the fold of resistance to groove
Property reduce.
Work hardening rate: 1000MPa or less
Work hardening rate is 1000MPa or less.Work hardening rate is set in this way, can reduce the tank in thinning process
The stress of sidewall portion is thinned mouldability and improves.Pot sidewall portion when above-mentioned work hardening rate is more than 1000MPa, in thinning process
Stress improve, be thinned mouldability reduce.Preferred work hardening rate is 900MPa or less.In addition, under work hardening rate
No special provision is limited, aluminum alloy materials used in the present invention are 800MPa or so.
Work hardening index n value: 0.060 or more
Work hardening index n value is 0.060 or more.N value is set in this way, promotes radius side in tank bottom groove tapered portion
To stretcher strain, the compressed material of circumferencial direction radial direction extend, the fold of resistance to groove improve.Above-mentioned n value is low
When 0.060, it is unable to fully obtain said effect, the fold of resistance to groove reduces.N value is preferably 0.070 or more.In addition, n value
The upper limit does not have special provision, the n value up to 0.090 or so of aluminum alloy materials used in the present invention.
Assign cold processing ratio 65% plastic deformation when tensile strength relative to blank plate tensile strength increase
Amount: 70MPa or less
Assign cold processing ratio 65% plastic deformation when tensile strength relative to blank plate tensile strength increase
Amount is preferably 70MPa or less.The stress in the pot sidewall portion being thinned in molding as a result, is lower, and therefore, broken tank is suppressed more.
In addition, being unable to fully obtain said effect when the incrementss of above-mentioned tensile strength are more than 70MPa, mouldability is thinned sometimes to be reduced.
The incrementss of preferred above-mentioned tensile strength are 60MPa or less.In addition, the lower limit of the incrementss of above-mentioned tensile strength is without spy
It does not provide, the incrementss of the above-mentioned tensile strength of aluminum alloy materials used in the present invention are down to 40MPa or so.
2. the manufacturing method of Used for Making Beverage Container Body aluminium alloy plate
Then, the manufacturing method of Used for Making Beverage Container Body of the invention aluminium alloy plate is described in detail.Beverage of the invention
The manufacturing method of tank body aluminium alloy plate has: the casting process of the aluminium alloy with specific composition of alloy；By ingot bar in spy
The Homogenization Treatments process that fixed condition is kept；The hot roughing operation that ingot bar after Homogenization Treatments is rolled with specific condition；
Hot roughing plate is specifically terminated to the hot finish to gauge process of temperature rolling；With by hot finish to gauge plate with specifically roll rate rolling it is cold
Roll process.
2-1. casting process
As casting process, the usual ways such as semi-continuous casting method, continuous casting process can be used.The casting process
In, the aluminium alloy of defined composition of alloy is fabricated to ingot bar (slab) for example, by water-cooled semi-continuous casting method.
2-2. Homogenization Treatments process
After the ingot bar of casting is carried out flush cut, in order to remove ingot bar solute atoms segregation and make fine
Precipitate is dissolved and is easy recrystallization, imposes Homogenization Treatments.Homogenization Treatments temperature is controlled at 550~620 DEG C.Lower than 550
DEG C when, increase as Mn existing for precipitate, recrystallized structure can not be formed after hot rolling, therefore, the joint flash rate of blank plate increases
Greatly.Tank is broken due to caused by the raw edges of tank body as a result, being easy to happen in DI molding.On the other hand, Homogenization Treatments temperature is super
When crossing 620 DEG C, expansion, and eutectic part partial melting are generated in casting surface, therefore, surface quality is substantially reduced.It is preferred that
Homogenization Treatments temperature be 580~600 DEG C.
In addition, the Homogenization Treatments time is 1 hour or more.When the Homogenization Treatments time is lower than 1 hour, it is unable to fully obtain
The effect of the segregation of above-mentioned removing ingot bar solute atoms makes fine precipitate be dissolved and be easy the effect recrystallized.Uniformly
The upper limit for changing the processing time does not have special provision, even if being 24 hours or more, said effect can be also saturated, and uneconomical.
The hot roughing operation of 2-3.
Ingot bar after Homogenization Treatments can carry out hot roughing operation immediately without reheating and directly.At homogenization
It is cooled to room temperature after reason, carries out the reheating for hot roughing, then increased as Mn existing for precipitate, the cold rolling after imposing
Obtained from the intensity of blank plate get higher.As a result, n value reduces.
Hot roughing start temperature is defined as 550~600 DEG C.When hot roughing start temperature is lower than 550 DEG C, deposited as precipitate
Mn increase, the intensity of the blank plate obtained by cold rolling later gets higher.As a result, n value reduces.On the other hand, heat is thick
When rolling start temperature and being more than 600 DEG C, the growth of the oxide scale film of formation becomes too fast, it is possible to will lead to the drop of surface quality
It is low.Preferred hot roughing start temperature is 570~590 DEG C.
The temperature specifications of milled sheet in hot roughing are 480 DEG C or more.This is because the temperature of the milled sheet in hot roughing
When lower than 480 DEG C, it is difficult to make 480 DEG C of aftermentioned hot roughing end temp or more.Rolling plate temperature in preferred hot roughing
It is 500 DEG C or more.In addition, the upper limit value of the rolling plate temperature in above-mentioned hot roughing is preferably 580 DEG C.
In addition, hot roughing end temp is defined as 480~550 DEG C.It is thick from heat when hot roughing end temp is lower than 480 DEG C
In the residence time that roll bonding beam starts to hot finish to gauge, increase as Mn existing for precipitate, the base obtained by cold rolling later
The intensity of flitch is got higher.As a result, n value reduces.Therefore, hot roughing end temp be 480 DEG C or more, preferably 500 DEG C or more,
Further preferably 520 DEG C or more.On the other hand, it when hot roughing end temp is more than 550 DEG C, is carried out again after hot roughing
Crystallization, it is possible to the recrystallization after hot finish to gauge can be inhibited.In addition, the upper limit value of hot roughing end temp is preferably 540 DEG C.
The hot finish to gauge process of 2-4.
It is 300~380 DEG C that hot finish to gauge, which terminates temperature specifications,.When the end temperature of hot finish to gauge is lower than 300 DEG C, even if increasing heat
Drafts in finish to gauge can not also form recrystallized structure.On the other hand, when the end temperature of hot finish to gauge is more than 380 DEG C, having can
It can surface quality reduction.Furthermore it is preferred that hot finish to gauge terminate temperature be 350~380 DEG C.
2-5. cold rolling process
Milled sheet carries out cold rolling process after hot finish to gauge.Rolling rate in cold rolling process is defined as 70~90%.Rolling rate
When lower than 70%, the intensity of blank plate is insufficient.On the other hand, when rolling rate is more than 90%, intensity is improved, and joint flash rate also mistake
Degree is got higher.
Embodiment
Then, the present invention is described in more detail based on example of the present invention and comparative example, but the present invention is not limited thereto.
Embodiment 1
In embodiment 1, under certain manufacturing condition, change the composition of used aluminum alloy materials.By usual
Semi-continuous casting method melting casting table 1 shown in form aluminium alloy, manufacture thickness 500mm slab.The slab is carried out flat
Face cutting is thickness 480mm, and after removing edge tissues, 1 hour Homogenization Treatments process is carried out at 600 DEG C.Then, to casting
The hot roughing operation of block progress single pass reverse type.The condition of hot roughing operation are as follows: in 580 DEG C of start temperature of rolling, roughing system
Milled sheet 500 DEG C of temperature, rolling terminate 500 DEG C of temperature.Then, the tandem of 4 bases (stand) is carried out to milled sheet
Hot finish to gauge process, obtains the hot rolled plate of plate thickness 1.9mm.The end temperature of hot finish to gauge process is 370 DEG C.In addition, to hot rolled plate into
Row cold rolling process forms the Used for Making Beverage Container Body aluminium alloy plate sample of plate thickness 0.285mm.In cold rolling process, 3 passages are carried out, make to close
Counting rolling rate is 85%.
[table 1]
Table 1
Used for Making Beverage Container Body aluminium alloy plate sample obtained is operated to as above, following mechanical properties is measured, then, evaluates resistance to
Groove fold and thinned mouldability.
As mechanical property, tension test is carried out in rolling direction according to JIS Z 2241, the stretching for measuring blank plate is strong
Degree.For same sample, each measurement 3, the tensile strength with these arithmetic mean of instantaneous value, as blank plate.
Then, it is based on JIS Z 2253, finds out the work hardening index n value that strain section is 1.5~4.0%.It is by n value
0.060 or more sample is denoted as good (zero), and the sample that will be less than 0.060 is denoted as bad (×).In addition, for same sample,
Each measurement 3, with these arithmetic mean of instantaneous value, as n value.
In addition, finding out work hardening rate as mechanical property.Specifically, with above-mentioned stretching test measurement σ-ε curve
(load-deformation curve), strain section be 1.5~4.0% range with trus stress σ-true strain ε slope of a curve d σ/d
ε calculates work hardening rate.In addition, for same sample, each measurement 3, with these arithmetic mean of instantaneous value, as processing hardening
Rate.
As further mechanical property, the tensile strength of the rolling direction relative to blank plate is found out, in identical rolling
The incrementss of tensile strength when the plastic deformation of direction imparting cold processing ratio 65%.Here, cold processing ratio 65% is assigned
Plastic deformation when tensile strength refer to when the Used for Making Beverage Container Body of plate thickness 0.285mm is carried out DI molding with aluminium alloy plate sample
The tensile strength in tank wall portion.That is, the plate thickness in the tank wall portion after molding DI is set as 100 μm, processed as cold rolling
Rate assigns 65% plastic deformation.By relative to the tensile strength of the rolling direction of blank plate in the tank body side of identical rolling direction
The incrementss of the tensile strength of wall portion are that 70MPa sample below is denoted as good (zero), by be more than 70MPa sample be denoted as it is bad
(×).In addition, for same sample, each measurement 4, with these arithmetic mean of instantaneous value, as the tank wall portion after molding DI
Tensile strength.
Mouldability is thinned
About DI mouldability, above-mentioned Used for Making Beverage Container Body is imposed into the tank body that DI is shaped to general beverage with aluminium alloy plate sample
The shape of (internal diameter 66mm, 100 μm of side wall plate thickness, 150 μm of side wall front end plate thickness), is evaluated.It is manufactured from identical sample
10000 tanks, the generation of research rupture and fracture.The spot that absolutely not will be ruptured and be broken continuously tank processed the case where
It is determined as good (zero), will be ruptured and is determined as the case where fracture all bad (×).In addition, will not occur rupture and
Fracture and can continuously tank processed but on surface, there is a situation where mechanical damage (galling), be determined as bad (△).
The fold of resistance to groove
About the fold of resistance to groove, cup body molding (blank diameter is carried out from above-mentioned Used for Making Beverage Container Body with aluminium alloy plate sample
140mm, cup diameter 87mm), later, drawing and forming is the shape of re-drawing tank (re-drawing diameter 66mm).Then, using measuring shape
Device spreads complete cycle, measures the relief amplitude of tank bottom groove tapered portion.It is 200 μm or less by the maximum value of the relief amplitude measured
The case where the case where being determined as good (zero), will being more than 200 μm be determined as bad (×).In addition, for same sample, it is each to measure
5, the maximum value with these arithmetic mean of instantaneous value, as relief amplitude.
Said determination result and evaluation result are indicated in table 2.
[table 2]
As shown in Table 2, using the manufacturing condition and composition of alloy for meeting the scope of the invention in prescribed limit of the invention
Example of the present invention 1~4 in, work hardening rate, n value and assign cold processing ratio 65% plastic deformation when tensile strength phase
For blank plate tensile strength incrementss in prescribed limit of the invention.As a result, the fold of resistance to groove and thinned molding
Property is good.
In contrast, composition of alloy is present invention provide that in outer comparative example 5~14, work hardening rate, n value and imparting
The tensile strength when plastic deformation of cold processing ratio 65% is relative at least appointing in the incrementss of the tensile strength of blank plate
Meaning one is outside prescribed limit of the invention.As a result, at least one of bottom fold and thinned mouldability are not good.
In comparative example 5, Mg content is excessive, therefore, assigns the tensile strength phase when plastic deformation of cold processing ratio 65%
Become larger for the incrementss of the tensile strength of blank plate, work hardening rate is got higher, and it is bad that mouldability is thinned.
In comparative example 6, Mg content is very few, and therefore, n value is lower, and the fold of resistance to groove is bad.
In comparative example 7, Mn content is excessive, and therefore, work hardening rate is got higher.As a result, it is bad that mouldability is thinned.
In comparative example 8, Mn content is very few, and therefore, n value is lower, in addition, the crystal with solid lubrication effect tails off.
As a result, the fold of resistance to groove becomes bad, deadlocked, the tank rough surface that generates heat further occurs in thinned mold, molding is thinned
Property is bad.
In comparative example 9, Fe content is excessive, therefore, forms coarse crystal, when molding is thinned, coarse crystal
The starting point of rupture is formed, it is bad that mouldability is thinned.
In comparative example 10, Fe content is very few, and therefore, the crystal with solid lubrication effect tails off, and sends out in thinned mold
Hair tonic hot glue, it is bad that mouldability is thinned in tank rough surface.
In comparative example 11, Si content is excessive, therefore, can not form recrystallized structure after hot rolling, in blank plate intensity exception
It rises.As a result, n value is lower, in addition, work hardening rate is got higher, stretching when assigning the plastic deformation of cold processing ratio 65% is strong
It spends and becomes larger relative to the incrementss of the tensile strength of blank plate.As a result, the fold of resistance to groove and thinned mouldability are bad.
In comparative example 12, Si content is very few, and therefore, the crystal with solid lubrication effect tails off, and sends out in thinned mold
Hair tonic hot glue, it is bad that mouldability is thinned in tank rough surface.
In comparative example 13, Cu content is excessive, and therefore, work hardening rate is got higher, and the plasticity for assigning cold processing ratio 65% becomes
Tensile strength when shape becomes larger relative to the incrementss of the tensile strength of blank plate.As a result, it is bad that mouldability is thinned.
In comparative example 14, Cu content is very few, and therefore, n value is lower, and the fold of resistance to groove is bad.
Embodiment 2
In embodiment 2, using the aluminium alloy material of same composition, change manufacturing condition.Using the alloy A of table 1, with implementation
Example 1 equally operates, and carries out casting and flush cut, obtains ingot bar.Then, it with condition shown in table 3, successively imposes at homogenization
Science and engineering sequence, hot roughing operation, hot finish to gauge process and cold rolling process, the Used for Making Beverage Container Body for forming plate thickness 0.285mm are tried with aluminium alloy plate
Sample.In addition, indicating the total rolling rate for carrying out 3 passages in cold rolling process.
[table 3]
Table 3
Used for Making Beverage Container Body aluminium alloy plate sample obtained is operated to as above, is operated similarly to Example 1, is measured mechanical special
Property, then, evaluate the fold of resistance to groove and thinned mouldability.Result is indicated in table 4.
[table 4]
As shown in Table 4, using the manufacturing condition and composition of alloy for meeting the scope of the invention in prescribed limit of the invention
Example of the present invention 15~20 in, work hardening rate, n value and assign cold processing ratio 65% plastic deformation when tensile strength
The incrementss of tensile strength relative to blank plate are in prescribed limit of the invention.As a result, the fold of resistance to groove and being thinned into
Type is good.
In contrast, manufacturing condition is present invention provide that in outer comparative example 21~26, work hardening rate, n value and tax
Tensile strength when giving the plastic deformation of cold processing ratio 65% in the incrementss of the tensile strength of blank plate relative at least appointing
Meaning one is outside prescribed limit of the invention.As a result, at least one of the fold of resistance to groove and thinned mouldability are bad
It is good.
In comparative example 21, temperature in the start temperature of hot roughing, rolling, to terminate temperature too low, therefore, recrystallized structure without
Method is sufficiently formed, and n value is lower, in addition, work hardening rate is got higher, in addition, when assigning the plastic deformation of cold processing ratio 65%
Tensile strength becomes larger relative to the incrementss of the tensile strength of blank plate.As a result, the fold of resistance to groove and thinned mouldability are not
It is good.
In comparative example 22, temperature and end temperature are too low in the rolling of hot roughing, and therefore, n value is lower, in addition, processing is hard
Rate is got higher, in addition, tensile strength of tensile strength when assigning the plastic deformation of cold processing ratio 65% relative to blank plate
Incrementss become larger.As a result, the fold of resistance to groove and thinned mouldability are bad.
In comparative example 23, the end temperature of hot roughing is too low, and therefore, n value is lower, in addition, work hardening rate is got higher, in turn
Tensile strength when assigning the plastic deformation of cold processing ratio 65% becomes larger relative to the incrementss of the tensile strength of blank plate.Its
As a result, the fold of resistance to groove and thinned mouldability are bad.
Temperature and terminate the end temperature of temperature and hot finish to gauge in comparative example 24, in the start temperature of hot roughing, rolling
It is too low, therefore, recrystallized structure can not be formed after hot rolling, raw material intensity rises extremely.As a result, n value is lower, in addition, plus
Work hardening ratio is got higher, and then the tensile strength when plastic deformation of imparting cold processing ratio 65% is strong relative to the stretching of blank plate
The incrementss of degree become larger.As a result, the fold of resistance to groove and thinned mouldability are bad.
In comparative example 25, the end temperature of hot roughing is excessively high, therefore, extremely reduces as Mn existing for precipitate, cold
In rolling, it is suppressed that the phenomenon that dislocation is assembled to precipitate.As a result, dislocation is intricately intertwine with each other even if assigning plastic deformation,
Also inhibit the movement of dislocation, work hardening rate is significantly got higher, and in addition assigns the stretching when plastic deformation of cold processing ratio 65%
Intensity becomes larger relative to the incrementss of the tensile strength of blank plate.As a result, it is bad that mouldability is thinned.
In comparative example 26, temperature in the start temperature of too low, the hot roughing of Homogenization Treatments temperature, rolling terminates temperature mistake
It is low, and the temperature of hot finish to gauge is too low, and therefore, n value is lower, and the fold of resistance to groove becomes bad.In addition, can not after hot roughing
Recrystallized structure is formed, therefore, the tensile strength of blank plate becomes excessively high, and thinned mouldability becomes bad.
Industrial utilizability
The fold of resistance to groove of Used for Making Beverage Container Body aluminium alloy plate of the invention and thinned mouldability are excellent, as soda
It is used with, beer and the tank body material of the various beverage cans of cold drink etc. is useful.In addition, Used for Making Beverage Container Body aluminium through the invention
The manufacturing method of alloy sheets can accurately manufacture above-mentioned Used for Making Beverage Container Body aluminium alloy plate.
Claims (3)
1. a kind of Used for Making Beverage Container Body aluminium alloy plate, it is characterised in that:
It is made of aluminium alloy, which contains mass %, Fe:0.35 of Si:0.20~0.45~0.60 mass %, Cu:0.10
~0.30 mass %, Mn:0.50~1.50 mass %, Mg:0.80~1.50 mass %, Ti:0.10 mass % or less, B:
0.050 mass % answers force-strain curve in rolling direction hereinafter, remainder is made of Al and inevitable impurity
In, work hardening rate is 1000MPa hereinafter, also, work hardening index n value is 0.060 or more.
2. Used for Making Beverage Container Body aluminium alloy plate as described in claim 1, it is characterised in that:
The tensile strength of rolling direction relative to the Used for Making Beverage Container Body aluminium alloy plate, the cold rolling for assigning identical rolling direction add
The incrementss of the tensile strength when plastic deformation of work rate 65% are 70MPa or less.
3. a kind of manufacturing method of Used for Making Beverage Container Body aluminium alloy plate, which is characterized in that have:
The casting process of cast aluminium alloy gold, wherein the aluminium alloy contains mass %, Fe:0.35 of Si:0.20~0.45~0.60 matter
Measure mass %, Mn:0.50 of %, Cu:0.10~0.30~1.50 mass %, Mg:0.80~1.50 mass %, Ti:0.10 matter
% or less, B:0.050 mass % are measured hereinafter, remainder is made of Al and inevitable impurity；
1 hour or more Homogenization Treatments process is kept with 550~620 DEG C to ingot bar；
Be set as 550~600 DEG C of start temperature, in 480 DEG C or more of rolling temperature and 480~550 DEG C of end temperature heat
Roughing operation；
It is set as the hot finish to gauge process of 300~380 DEG C of end temperature；With
It is set as the cold rolling process of 70~90% rolling rate.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014-139117 | 2014-07-04 | ||
| JP2014139117 | 2014-07-04 | ||
| PCT/JP2015/003337 WO2016002226A1 (en) | 2014-07-04 | 2015-07-02 | Aluminum alloy plate for beverage can body and method for manufacturing same |
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| Publication Number | Publication Date |
|---|---|
| CN106460106A CN106460106A (en) | 2017-02-22 |
| CN106460106B true CN106460106B (en) | 2018-12-11 |
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| Country | Link |
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| JP (1) | JP6912886B2 (en) |
| CN (1) | CN106460106B (en) |
| WO (1) | WO2016002226A1 (en) |
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| JP7426243B2 (en) | 2020-01-14 | 2024-02-01 | 株式会社神戸製鋼所 | Aluminum alloy plate for bottle body |
| FR3122666B1 (en) | 2021-05-04 | 2024-06-21 | Constellium Neuf Brisach | 5xxx ALUMINUM SHEETS FOR CAN MANUFACTURING |
| CN114592145B (en) * | 2022-01-27 | 2022-11-22 | 晟通科技集团有限公司 | Production method of aluminum-titanium foil |
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| JPH04228535A (en) * | 1990-07-16 | 1992-08-18 | Sky Alum Co Ltd | Aluminum alloy hard sheet for forming small in work hardening |
| JPH0533107A (en) * | 1991-07-31 | 1993-02-09 | Sumitomo Light Metal Ind Ltd | Production of hard aluminum alloy sheet excellent in strength and formability |
| CN1183813A (en) * | 1995-03-09 | 1998-06-03 | 戈尔登铝材公司 | Method for making aluminium alloy sheet products |
| CN1191578A (en) * | 1995-06-26 | 1998-08-26 | 美国铝公司 | Method for making aluminium alloy can stock |
| CN101016607A (en) * | 2006-09-06 | 2007-08-15 | 中铝西南铝板带有限公司 | Homogenization heat treatment method of aluminum alloy ingot casting for pop-top can body |
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|---|---|---|---|---|
| JP3748438B2 (en) * | 2003-03-31 | 2006-02-22 | 株式会社神戸製鋼所 | Aluminum alloy plate for packaging container and method for producing the same |
| JP4791072B2 (en) * | 2005-04-14 | 2011-10-12 | 古河スカイ株式会社 | Aluminum alloy plate for beverage can body and manufacturing method thereof |
| JP2007051307A (en) * | 2005-08-15 | 2007-03-01 | Furukawa Sky Kk | Aluminum alloy sheet for can body having excellent bottom wrinkle property, and its manufacturing method |
| JP2007277693A (en) * | 2006-04-12 | 2007-10-25 | Furukawa Sky Kk | Aluminum alloy sheet for drink can body and its production method |
| JP5113411B2 (en) * | 2007-03-29 | 2013-01-09 | 株式会社神戸製鋼所 | Aluminum alloy plate for packaging container and method for producing the same |
| JP2008274319A (en) * | 2007-04-26 | 2008-11-13 | Furukawa Sky Kk | Method for manufacturing aluminum alloy sheet for beverage can body |
| JP2009235475A (en) * | 2008-03-27 | 2009-10-15 | Furukawa-Sky Aluminum Corp | Aluminum alloy sheet for can body excellent in circularity of drawn cup, and method for producing the same |
| JP5670215B2 (en) * | 2011-02-15 | 2015-02-18 | 株式会社Uacj | Aluminum alloy plate for can body and manufacturing method thereof |
| JP6054658B2 (en) * | 2012-07-06 | 2016-12-27 | 株式会社Uacj | Aluminum alloy plate for can body and manufacturing method thereof |
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- 2015-07-02 CN CN201580032085.4A patent/CN106460106B/en active Active
- 2015-07-02 JP JP2016531121A patent/JP6912886B2/en active Active
- 2015-07-02 WO PCT/JP2015/003337 patent/WO2016002226A1/en active Application Filing
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04228535A (en) * | 1990-07-16 | 1992-08-18 | Sky Alum Co Ltd | Aluminum alloy hard sheet for forming small in work hardening |
| JPH0533107A (en) * | 1991-07-31 | 1993-02-09 | Sumitomo Light Metal Ind Ltd | Production of hard aluminum alloy sheet excellent in strength and formability |
| CN1183813A (en) * | 1995-03-09 | 1998-06-03 | 戈尔登铝材公司 | Method for making aluminium alloy sheet products |
| CN1191578A (en) * | 1995-06-26 | 1998-08-26 | 美国铝公司 | Method for making aluminium alloy can stock |
| CN101016607A (en) * | 2006-09-06 | 2007-08-15 | 中铝西南铝板带有限公司 | Homogenization heat treatment method of aluminum alloy ingot casting for pop-top can body |
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| Publication number | Publication date |
|---|---|
| JPWO2016002226A1 (en) | 2017-04-27 |
| CN106460106A (en) | 2017-02-22 |
| JP6912886B2 (en) | 2021-08-04 |
| WO2016002226A1 (en) | 2016-01-07 |
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