CN107406923A - Negative pressure cover aluminium alloy plate - Google Patents
Negative pressure cover aluminium alloy plate Download PDFInfo
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- CN107406923A CN107406923A CN201680013102.4A CN201680013102A CN107406923A CN 107406923 A CN107406923 A CN 107406923A CN 201680013102 A CN201680013102 A CN 201680013102A CN 107406923 A CN107406923 A CN 107406923A
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- aluminium alloy
- rolling
- width direction
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 51
- 238000005097 cold rolling Methods 0.000 claims abstract description 34
- 238000005098 hot rolling Methods 0.000 claims abstract description 32
- 239000013078 crystal Substances 0.000 claims abstract description 31
- 238000005096 rolling process Methods 0.000 claims abstract description 31
- 238000005259 measurement Methods 0.000 claims abstract description 21
- 239000012535 impurity Substances 0.000 claims abstract description 6
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 3
- 238000005275 alloying Methods 0.000 claims 1
- 238000001953 recrystallisation Methods 0.000 abstract description 29
- 239000000463 material Substances 0.000 description 39
- 238000000034 method Methods 0.000 description 30
- 230000008569 process Effects 0.000 description 21
- 238000012360 testing method Methods 0.000 description 19
- 230000000052 comparative effect Effects 0.000 description 11
- 238000000137 annealing Methods 0.000 description 10
- 238000010438 heat treatment Methods 0.000 description 9
- 238000002425 crystallisation Methods 0.000 description 7
- 230000008025 crystallization Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 238000004826 seaming Methods 0.000 description 7
- 238000007493 shaping process Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 239000004411 aluminium Substances 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 229910018643 Mn—Si Inorganic materials 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 4
- 238000005266 casting Methods 0.000 description 4
- 238000004088 simulation Methods 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 238000005530 etching Methods 0.000 description 3
- 238000013213 extrapolation Methods 0.000 description 3
- 230000001737 promoting effect Effects 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- 229910002551 Fe-Mn Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000035622 drinking Effects 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910019064 Mg-Si Inorganic materials 0.000 description 1
- 229910019406 Mg—Si Inorganic materials 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000037237 body shape Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Chemical class O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 230000004941 influx Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000004611 spectroscopical analysis Methods 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
- B21B2003/001—Aluminium or its alloys
-
- 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
-
- 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
Abstract
One kind contains Si, Fe, Mn, Mg, the aluminium alloy plate that surplus is made up of Al and inevitable impurity with specified quantitative.The recrystallization rate of plate after hot rolling is more than 90%, and the central portion in plate width direction and end, during the set tissue of 1/4 thickness from plate surface to thickness of slab in the measurement section parallel with rolling direction, for the difference of the cube orientation area occupation ratios of the central portion and the area occupation ratio of the cube orientations of end below 10%, the length-width ratio of the crystal grain on the surface of the plate after cold rolling is more than 5.
Description
Technical field
The present invention relates to negative pressure cover aluminium alloy plate, more particularly in the small negative pressure cover of plate width direction earing rate difference
Use aluminium alloy plate.
Background technology
Always, especially as the packing container of beverage, the body portion and lid by bottomed cylindrical are widely used that
The aluminium pot for the two-piece type that portion is formed.
General manufacturing process ＞s of the ＜ on cover
The cover of aluminium pot as composition, manufactured by following such process.Firstly, for the negative pressure cover as former material
With aluminium alloy plate, after the chemical conversion treatment for implementing chromic acid salt treatment for ensuring corrosion resistance etc., then for implementing describedization
Negative pressure cover into processing carries out application and baking with the one or both sides of aluminium alloy plate.
Secondly, after shape as defined in the negative pressure cover by application, baking is punched into aluminium alloy plate, shell is carried out
Body shapes.Then, for the negative pressure cover aluminium alloy plate by the housing molding, shape for the seaming with tank body seaming detection
Portion's (flanging part) and turn into cover, to the seaming portion of the cover inject the compound lining of rubber.Thereafter, carry out including as follows
The conversion shaping of process：Implement the rivet forming process of film bubble shaping and button shaping；Implement the quarter of the Pocket Machining of opening portion
The reinforcement embossment style forming process of the processing of trace processing, implementation bumps and word etc.；And implement dress draw ring staking out into
Shape process.Finally, after filling content in tank body, the tank body is rolled up with implementing the cover of the forming
Envelope, is cleaned and is sterilized.
Requirement characteristic ＞s of the ＜ on cover
When cover is by with tank body seaming detection, if the size of flanging part has deviation, generation seaming is bad, has strictly for cover
Dimension precision requirement.It is also required that after seaming, even if because the heating of sterilization process causes internal pressure to rise, also will not
The compressive resistance of reflex action (warpage) occurs, and after being delivered in the hand of consumer, when holding up (or pulling) draw ring can opening,
Drinking mouth can be opened without barrier.
Requirement characteristic ＞s of the ＜ on material
In order to obtain such cover, for the aluminium alloy plate as material, it is desirable to have the formability as cover, be used for
Suppress the bad low ANISOTROPIC DEFORMATION (earing rate) of seaming, the strength of materials for obtaining compressive resistance, for avoiding occurring
The bad rivet formability of can opening and lancinating (can opening) etc..
Further, in the shaping of cover, the general earing rate for considering material, the blank plate that can make implementation drawing is not just
Circle and be not rounded, material during drawing and forming is circumferentially changed to the influx of nib, make the peristoma portion of the lid after drawing and forming
High uniformity.But the earing rate of material it is big when, even if in this way, making the peristoma portion of the lid after drawing and forming
Also difficult therefore low to the earing rate material of high uniformityization requirement it is high.
On the other hand, in patent document 1~3, the low cover aluminium alloy plate of earing rate is disclosed, in patent document 4
In, disclose that earing rate is low, and the poor small cover aluminium alloy plate of earing rate of plate width direction.Further, patent document 1~4
Described cover aluminium alloy plate, it is middle without applying after hot rolling or in the way of cold rolling from the viewpoint of cost is reduced
Annealing, but coiled material shape is coiled into after cold rolling and is allowed to self annealing and manufactures, commonly referred to as lead directly to process material or be only called straight-through
Material.
【Prior art literature】
【Patent document】
【Patent document 1】Japanese Laid-Open 2013-023757 publications
【Patent document 2】Japanese Laid-Open 2009-221567 publications
【Patent document 3】Japanese Laid-Open 2011-052290 publications
【Patent document 4】Japanese Laid-Open 2007-131920 publications
In the wider aluminium alloy plate of width, during due to hot rolling between plate width direction end and central portion caused temperature
Difference, cause in hot rolling and after hot rolling organize the formation of it is significantly affected, thus in hot rolling material occur plate width direction tissue
Deviation.If applying intermediate annealing after hot rolling or in the way of cold rolling, (intermediate annealing after hot rolling (before cold rolling) is also referred to as slightly moved back
Fire), then the tissue deflection can be eliminated by intermediate annealing, the earing rate of plate width direction is reduced in the sheet after cold rolling
Difference.But if not carrying out the straight-through process material of intermediate annealing, then caused tissue deflection is easily retained in hot rolling material
In sheet after cold rolling, this turns into the reason for big earing rate difference occurs for plate width direction.
In patent document 4, by controlling the plate temperature (before hot finish to gauge starts), the rolling in hot finish to gauge after hot roughing
Oil flow and hot rolling after coiling condition, by the earing rate difference of the plate width direction of cover aluminium alloy plate reduce to 2% with
It is interior.But in order to further improve the dimensional accuracy of the cover after drawing process, then require the drop of earing rate difference strict all the more
It is low.
The content of the invention
Therefore, it is an object of the present invention to the straight of the negative pressure cover aluminium alloy plate with the equal composition of existing material
In logical process material, the earing rate for further reducing plate width direction is poor.
In order to solve the problem, present inventors found that, each element in enabling aluminum alloy to is led to after defined scope
The pressure logarithmic strain for each frame for controlling hot finish to gauge is crossed, then the earing rate difference of plate width direction reduces, so as to reach the present invention.
The negative pressure cover aluminium alloy plate of the present invention, it is characterised in that contain Si：More than 0.05 mass % and 0.40%
Below quality, Fe：More than 0.10 mass % and below 0.50 mass %, Mn：More than 0.10 mass % is simultaneously less than 0.80 matter
Measure %, Mg：More than 1.0 mass % and below 3.5 mass %, surplus is made up of Al and inevitable impurity, after hot rolling
The recrystallization rate of plate is more than 90%, and the central portion in plate width direction and end, the measurement section parallel with rolling direction
During the set tissue of 1/4 thickness from plate surface to thickness of slab, the cube orientation area occupation ratios of the central portion and the cube of end take
To the difference of area occupation ratio be less than 10%, the length-width ratio of the crystal grain of the plate surface after cold rolling is more than 5.In the aluminium alloy, root
According to needing containing Cu：Below 0.4 mass %.
According to the present invention, in the straight-through process material of cover aluminium alloy plate, the system of plate width direction can be further reduced
Ear rate is poor, thus, can suppress, because the shaping position of plate width direction is different, to cause the cap-shaped shape after drawing and forming difference occur.Separately
Outside, negative pressure cover aluminium alloy plate of the invention, its strength of materials is high, can obtain the compressive resistance of needs, rivet formability
Also it is excellent.
Brief description of the drawings
Fig. 1 is the figure for the position for illustrating measuring assembly tissue.
Fig. 2 is the profile that explanation is used to evaluate the bulging test of rivet formability.
Fig. 3 is the figure for extracting position for illustrating to measure the test film of earing rate difference.
Embodiment
Hereinafter, the negative pressure cover aluminium alloy plate on the present invention, with regard to the set tissue of the plate after its composition composition, hot rolling
The length-width ratio and manufacture method of the crystal grain of plate (sheet) after (area occupation ratio of cube orientations), cold rolling illustrate.
＜ compositions form ＞
Si：More than 0.05 mass % and below 0.40 mass %
Si forms Mg-Si systems, Al-Fe-Mn-Si systems crystallization thing in aluminium alloy, has tying again after promoting hot rolling
Brilliant effect.When Si content is less than 0.05 mass %, the amount of waste that can be used in the raw material of aluminium alloy plate is reduced, and
Aluminium ingot needs purity to uprise, therefore cost increases.On the other hand, when Si content is higher than 0.40 mass %, by hot rolling
Fine Al-Fe-Mn-Si systems precipitate is largely generated in process, in aluminium alloy, the recrystallization after hot rolling is hindered, makes rivet
Formability reduces.Therefore, Si content is more than 0.05 mass % and below 0.40 mass %.
Fe：More than 0.10 mass % and below 0.50 mass %
Fe forms Al-Fe-Mn systems, Al-Fe-Mn-Si systems crystallization thing in aluminium alloy, has after promoting hot rolling
The effect of recrystallization.When Fe content is less than 0.10 mass %, the crystallization thing deficiency, the recrystallization after hot rolling is insufficient, riveting
Following closely formability reduces.On the other hand, when Fe content is higher than 0.50 mass %, the crystallization thing in aluminium alloy plate is big, in addition by mistake
Formed surplusly, rivet formability reduces.Therefore, Fe content is more than 0.10 mass %, below 0.50 mass %.
Mn：More than 0.10 mass % is simultaneously less than 0.80 mass %
Mn has the effect that the intensity for enabling aluminum alloy to plate improves, and formed in aluminium alloy plate Al-Fe-Mn systems,
Al-Fe-Mn-Si systems crystallization thing, there is the effect of the recrystallization after promoting hot rolling.When Mn content is less than 0.10 mass %,
Intensity decreases, and the recrystallization after hot rolling is insufficient, and rivet formability reduces.On the other hand, Mn content is in 0.80 matter
When measuring more than %, the crystallization thing in aluminium alloy plate is big, by superfluous is formed in addition, makes the reduction of rivet formability.Therefore, Mn contains
Measure as more than 0.10 mass % and be less than 0.80 mass %.
Mg：More than 1.00 mass % and below 3.50 mass %
Mg has the effect that the intensity for enabling aluminum alloy to plate improves.When Mg content is less than 1.00 mass %, aluminium alloy plate
Intensity is insufficient, is configured to compressive resistance deficiency during cover.On the other hand, when Mg content is higher than 3.50 mass %, aluminium closes
The intensity of golden plate is superfluous, and rivet formability reduces.Therefore, Mg content be more than 1.00 mass % and 3.50 mass % with
Under.
Cu：Below 0.40 mass %
Cu has the effect that the intensity for enabling aluminum alloy to plate improves, therefore is added as needed on.Cu content is higher than 0.40 matter
When measuring %, the intensity of aluminium alloy plate is superfluous, and rivet formability reduces.Therefore, Cu content is below 0.40 mass %.
Inevitable impurity
The aluminium alloy plate of the present invention, in addition to above-mentioned element, also containing inevitable impurity.As inevitable
Impurity, such as allow Cr, Ti, Zr, Zn respectively below 0.30 mass %, the scope preferably respectively below 0.05 mass % contains
Have, it is allowed to which the scope of V, Ni, In, Sn, Ga and other elements respectively below 0.05 mass % contains.
The area occupation ratio ＞ of ＜ cube orientations
The central portion of the plate width direction of plate after hot rolling and end, the measurement section parallel with rolling direction from plate table
Face to 1/4 thickness of thickness of slab set tissue when, the central portion and end cube orientation area occupation ratio difference for 10% with
Under.Close related pass be present to the earing rate of the plate (sheet) after cold rolling in the area occupation ratio of cube orientations of the plate after hot rolling
When the difference for being the area occupation ratio for being orientated the cube of the plate after hot rolling is less than 10%, energy in the drawing and forming of the plate after cold rolling
It is enough that the earing rate difference of plate width direction is reduced to less than 1%.Further, the measured zone of area occupation ratio for being orientated why cube is
Thickness of slab skin section (region of 1/4 thickness from plate surface to thickness of slab), is due to relative to thickness of slab central portion, in thickness of slab skin section
The side measured, in plate width direction central portion and end, the area occupation ratio of its cube orientations is easily different.
The length-width ratio ＞ of ＜ crystal grain
The aluminium alloy plate of the present invention, it is without intermediate annealing after hot rolling and through the so-called straight-through process material of cold rolling manufacture.
Aluminium alloy plate recrystallization after hot rolling, crystal grain turn into equiax crystal, continue through cold rolling, and crystal grain stretches along rolling direction.In this hair
In bright, with the average crystal grain diameter (average crystal grain length) measured via straight line interior extrapolation method in rolling direction, divided by equally by
The value for the average crystal grain diameter (mean grain width) that straight line interior extrapolation method measures on the direction at a right angle relative to rolling direction,
The referred to as length-width ratio of crystal grain.By carrying out cold rolling with rolling rate described later, the length-width ratio of the crystal grain of the plate surface after cold rolling for 5 with
On.When length-width ratio described in plate after cold rolling is more than 5, the worked structure that cold rolling is formed is very flourishing, thus after hot rolling
Plate in caused plate width direction histological difference it is small, the earing rate difference of plate width direction is small.In contrast, the length-width ratio is less than
When 5, worked structure it is flourishing insufficient, the histological difference of caused plate width direction does not diminish in plate after hot rolling, and plate is wide
The earing rate difference in direction can not diminish.
Further, if in the negative pressure cover aluminium alloy for the non-straight-through process material that intermediate annealing has been carried out in cold rolling way
Plate, then the length-width ratio of the crystal grain of the plate surface after cold rolling be usually less than 5.
＜ manufacture methods ＞
Above-mentioned negative pressure cover aluminium alloy plate, being capable of cast, homogenize heat treatment, hot rolling and cold rolling process manufacture.
Semi-continuous casting method (DC (direct chill) castings) can be used in casting.
Homogenize heat treatment, is the ingot bar for casting to obtain by DC, with 480~620 DEG C of conditions for being kept for 2~10 hours
Carry out.When treatment temperature is less than 480 DEG C, homogenizing for solute element is insufficient, if treatment temperature is higher than 620 DEG C, ingot bar
Surface is likely to occur the melting (burning) of locality.If the retention time is more than 2 hours, can homogenize, if being higher than
10 hours, then energy cost cause to waste.Homogenize heat treatment and the preparation heating for subsequent hot rolled.
Hot rolling is made up of hot roughing and hot finish to gauge.Aluminium alloy plate after hot roughing (before hot finish to gauge starts), make plate central
The temperature in portion is 400 DEG C~480 DEG C, and it is less than 40 DEG C to make the temperature of plate end and the temperature difference of plate central portion.Why make hot whole
The temperature for rolling the plate central portion of beginning soon is more than 400 DEG C, is in order to ensure the end temp of aftermentioned hot finish to gauge (batches temperature
Degree), on the other hand, it is less than 480 DEG C why to make the temperature, is to be mingled with (Pick up to prevent from pecking print
Inclusion such surface defect) occurs.In addition, why make the temperature difference of plate end and plate central portion be less than 40 DEG C,
If being because the temperature difference becomes much larger, even if carrying out hot finish to gauge described later, the tissue deflection of plate width direction can not be reduced fully.
Hot finish to gauge uses the finishing mill being made up of the frame of tandem four to carry out, the pressure logarithmic strain (ε 1) of the first frame and
The pressure logarithmic strain (ε 2) of second frame adds up to less than 1.25 (ε 1+ ε 2≤1.25).In addition, the pressure pair of the 4th frame
Number strain (ε 4) and the difference of the pressure logarithmic strain (ε 3) of the 3rd frame are more than 0.16 (ε 4- ε 3 >=0.16).Further, depress
Logarithmic strain ε, if it is t0 to enter side plate thickness, when side panel thickness is t, represented by following formula 1.
ε=ln (t0/t) ... (1)
If the total of the pressure logarithmic strain of the first frame and the second frame is higher than 1.25 (＞ 1.25 of ε 1+ ε 2), due to
The temperature difference of plate width direction, cause in the first frame and the second frame, compared with plate width direction central portion, plate width direction end stores
The substantial amounts of strain of product.On the other hand, in the present invention, adding up to the pressure logarithmic strain of the first frame and the second frame is passed through
Suppress below 1.25 (ε 1+ ε 2≤1.25), then the carry out degree of the recrystallization of plate width direction central portion is suppressed wide with plate
Direction end is same degree, the accumulation equalization of the strain of plate width direction.Thus, in the recrystal grain grown after hot finish to gauge
Cube is orientated the ratio of grain, in plate width direction by equalization.
In addition, in the present invention, the difference for making the 4th frame and the pressure logarithmic strain of the 3rd frame is more than 0.16 (ε 4-
ε 3 >=0.16), suppress the pressure logarithmic strain of the 3rd frame, concentrate strain in final frame.By suppressing the 3rd frame
Depress logarithmic strain, and first, two frames are same, can suppress that to cause the accumulation of strain to occur poor because of the temperature difference of plate width direction
Different, thus, the accumulation of the strain of plate width direction is by equalization.On the other hand, by increasing the pressure logarithmic strain of the 4th frame,
The carry out degree of recrystallization after batching in plate width direction by equalization, as a result, what is grown after can making hot finish to gauge ties again
The ratio of cube orientation grains in Jingjing grain is in plate width direction equalization.
Further, if making the difference of the 4th frame and the pressure logarithmic strain of the 3rd frame be less than 0.16 (＜ 0.16 of 4 ε of ε 3),
Applied by the first~the 3rd frame and force work, difference occurs in the carry out degree of plate width direction recrystallization.Therefore, plate width direction
The accumulation of strain can be variant, the amount of the cube orientations in the recrystal grain grown after hot finish to gauge, with plate width direction central portion
Compare, become more in plate width direction end.As a result, the earing rate of plate width direction end is negative (strong at 0-90 °), it is wide in plate
The earing rate difference in direction becomes big.
The end temp (coiling temperature) of hot finish to gauge is 300~370 DEG C.By being batched with this temperature, aluminium alloy plate turns into
Recrystallized structure.In order to obtain excellent rivet formability in the aluminium alloy plate after cold rolling, it is necessary to the recrystallization rate of hot rolled plate
For more than 90% (non-recrystallization portion is less than 10%).When coiling temperature is less than 300 DEG C, the recrystallization rate of hot rolled plate reduces, cold rolling
The rivet formability of plate (sheet) afterwards reduces.On the other hand, when coiling temperature is higher than 370 DEG C, material temperature during hot finish to gauge
Height is spent, pecks print and is mingled with such surface defect and be possible to generation.Further, coiling temperature can be by the 3rd frame and the 4th machine
The size adjustment of the drafts of frame.
Cold rolling is carried out with the rolling rate for amounting to 80~93%, without intermediate annealing before cold rolling or in way.Cold rolling
Rolling rate be less than 80% when, the length-width ratio of the crystal grain diameter of the plate (sheet) after cold rolling is small, worked structure it is flourishing insufficient,
The earing rate difference of plate width direction does not reduce fully.In addition, the intensity of the plate after cold rolling does not also improve fully.On the other hand,
If the rolling rate of cold rolling is higher than 93%, number of pass times (rolling number) increase of cold rolling, productivity ratio reduces.In addition, rolling rate
During higher than 93%, yield strength excessively rises, and formability reduces, or earing rate during drawing and forming becomes big.
Manufacture method more than, the straight-through process material of the negative pressure cover aluminium alloy plate of the present invention can be able to.
【Embodiment】
More than, the mode for implementing the present invention is set forth, below, will confirm that the implementation of the effect of the present invention
The comparative example of important document of the example with being unsatisfactory for the present invention contrasts, and is specifically illustrated.Further, the present invention is not limited by the embodiment
It is fixed.
(being made for examination material)
The aluminium alloy of composition shown in fusing, casting table 1, carries out facing to ingot bar top layer and makes slab.To this
Slab implementation homogenizes after heat treatment, carries out hot rolling (hot roughing and hot finish to gauge).The condition of homogenize process, the end of hot finish to gauge
Total (ε of the pressure logarithmic strain (ε 2) of temperature (coiling temperature), the pressure logarithmic strain (ε 1) of the first frame and the second frame
1+ ε 2), the difference (ε 4- ε 3) of the pressure logarithmic strain (ε 4) of the 4th frame and the purpose pressure logarithmic strain (ε 3) of 3 frames shows
In table 2.Further, the aluminium alloy plate after hot roughing (before hot finish to gauge starts), the temperature of its plate central portion is 400 DEG C~480
In the range of DEG C, the temperature of plate end is poor in the range of 5~30 DEG C with the temperature of plate central portion.
After hot rolling, without intermediate annealing, cold rolling (roughing and finish to gauge) is carried out, makes thickness of slab 0.250mm sheet (tank
Lid aluminium alloy plate).Total cold rolling rate is shown in table 2.
【Table 1】
* the place outside prescribed limit of the invention
【Table 2】
Note 1：Pressure logarithmic strain (the ε of 1 frame1)+2 frames pressure logarithmic strain (ε2)
Note 2：Pressure logarithmic strain (the ε of the frame of pressure logarithmic strain (ε 4) -3 of 4 frames3)
* the place outside prescribed limit of the invention
Using the plate (hot rolled plate) after hot rolling and the plate (sheet) after cold rolling as trying material, following measurement examination is carried out
Test.Its result is shown in table 3.
<The measurement of recrystallization rate>
From each for cutting test film on examination material (hot rolled plate), in a manner of being able to observe that the section parallel with rolling direction
Grinding resin is embedded to, same section is ground and makes minute surface, after then etching, is seen using 100 times of light microscope of multiplying power
Crystalline structure is examined, measures recrystallization rate.The section of observation is in each material for examination, for plate width direction central portion with both ends (away from side
Edge 20mm position) this is at 3.It is tr in the thickness of the recrystallized structure of thickness of slab orientation measurement, together if the thickness of slab for examination material is t
When the thickness in sample non-recrystallization portion is tn, t=tr+tn, the value that (tr/t) × 100 calculate according to recrystallization rate.Recrystallization group
Knit and be made up of equi-axed crystal, non-recrystallization portion is the worked structure extended along rolling direction, and both can be by the section
Grain shape is distinguished by.In each material for examination, using the value of minimum recrystallization rate among at described 3 as it is each for examination material again
Percent crystallization in massecuite and describe in table 3.The appropriate scope of recrystallization rate is more than 90%.If the recrystallization rate of hot rolled plate be 90% with
On, then the rivet formability of sheet (negative pressure cover with aluminium alloy plate) has no problem.In table 3, in the column of recrystallization rate one
Zero mark means that recrystallization rate is more than 90%, and × mark means less than 90%.
＜ gathers the measurement ＞ of tissue
From each for cutting test film on examination material (hot rolled plate), to be able to observe that the cross-section parallel with rolling direction
Mode is embedded to grinding resin, grinds same section and makes minute surface.Thereafter ESCA (Electron are used to same section
Spectroscopy for Chemical Analysis) ion(ic) etching is carried out, use EBSD (Electron Back
Scattering Diffraction) method measures the cube in the section parallel with rolling direction and is orientated area occupation ratio.Based on EBSD methods
Measurement, use Jeol Ltd.'s FE-SEM7000F scanning electron microscopes, and Co., Ltd. TSL ソ リ ュ
ー シ ョ Application ズ photodetectors, implement the accelerating potential of measurement apparatus with 20kV.The section of observation is plate in each material for examination
The end of cross direction central portion and side (position away from edge 20mm), with the measurement position in section, as shown in figure 1, be by
With section along thickness of slab direction equably the quartering when thickness of slab skin section (region of 1/4 thickness from plate surface to thickness of slab) appoint
Meaning side.In addition, the cube that area occupation ratio and plate width direction end are orientated according to the cube of plate width direction central portion is orientated area occupation ratio,
Calculate the difference of both cube orientation area occupation ratios.When the difference of cube orientation area occupation ratios is less than 10%, sheet can be made
The earing rate difference of plate width direction is within 1%.It is { 100 } face in plate surface and the ＞ directions of ＜ 001 here, so-called cube orientation
The crystal grain parallel with rolling direction, the ideal orientation being orientated relative to cube, crystal grain of the inclination angle within 15 ° are orientated for cube,
Calculate cube orientation area occupation ratios.
The measurement ＞ of the length-width ratio of ＜ crystal grain
From each for cutting test film in examination material (sheet), lapped face is allowed to for minute surface, then be electrolysed surface
Etching, photo is observed grain structure and shoots again with multiplying power 100 using light microscope.
Using the photo, the average crystal grain diameter by the measurement of straight line interior extrapolation method relative to rolling direction direction at a right angle
(average crystal grain length).Specifically, on the direction at a right angle relative to rolling direction, converted according to the engineer's scale on photo
The line segment as more than 0.3mm is marked, counts the number of the crystal grain completely cut through by same line segment, tries to achieve being averaged for this shearing length
Value.Change the position on photo and same measurement (meter 5 times) is repeated, try to achieve the average value of shearing length respectively.Make to try to achieve
5 shearing lengths the further average value of average value, it is straight as the average crystal grain relative to rolling direction direction at a right angle
Footpath (mean grain width).In addition, using the photo, same measurement is also carried out in rolling direction, tries to achieve rolling direction
Average crystal grain diameter (average crystal grain length).With the average crystal grain diameter (average crystal grain length) of rolling direction, divided by relative to
The value of the average crystal grain diameter (mean grain width) in rolling direction direction at a right angle, the length-width ratio as crystal grain.
The measurement ＞ of the yield strengths of ＜ 0.2%
For each for examination material (sheet), implement simulation coating baking process 250 DEG C × 20 seconds carried out by oil bath
Heat treatment after, make draw direction parallel with rolling direction and make JIS-5 tension test sheets, according to JISZ2241 rule
Surely tension test is carried out, tries to achieve 0.2% yield strength.The proper range of 0.2% yield strength is more than 250MPa.If
0.2% yield strength is in more than 250MPa, even the then cover of thin-walled property, still meets compressive resistance.From rivet formability
Viewpoint is set out, and preferably 0.2% yield strength is below 298MPa.
The measurement ＞ of ＜ rivet formabilities
For each for examination material (sheet), implement simulation coating baking process 250 DEG C × 20 seconds carried out by oil bath
Heat treatment after, by it is each for try material make 50mm × 50mm test film, implement simulation foamed process bulging test, try to achieve pole
Limit bulging height.Between bulging test is as shown in Fig. 2 clamp upper lower punch 2,3 by test film 1, fixed with certain pressure-pad-force,
Drift 4 is vertically pressed into for the central portion of test film 1 and carries out bulging processing.Punch die 2, the internal diameter of 3 its nib are 6.60mm, shoulder
Portion's radius is 0.40mm, and its external diameter of drift 4 is 6.00mm, a diameter of 1mm of the central planar portion on head, the shoulder radii on head
For 2.50mm.
By the bulging test, crackle and necking down do not occur for test film 1, and just measurement carries out the bulging height of bulging processing
Limiting value (limit bulging height).The proper range of limit bulging height is more than 1.45mm.If gauge bulging is highly
More than 1.45mm, then the button of enough height can be shaped when actually shaping, rivet has excellent formability, and can pass through staking out work
Sequence firmly fixed pull ring.Further, if the fixation of draw ring is insufficient, draw ring is come off when can opening can occur and drinking mouth can not be beaten
The problem of opening.
The measurement ＞ of ＜ earing rates difference
For each for examination material (sheet), implement simulation coating baking process 250 DEG C × 20 seconds carried out by oil bath
Heat treatment after, the test film that wide 100mm is cut from plate width direction central portion and both ends (reference picture 3) amounts to 3.Then,
From the central portion extraction diameter 66.7mm of each test film circular blank, so that drawing ratio 1.67 carries out drawing and forming and cylinder is made
Container.Under the Sidewall Height of the cylindrical vessel, on the basis of the rolling direction of cylindrical vessel bottom surface, in circumferencial direction with 45 °
Spacing 8 points of total measurement, earing rate (re) is tried to achieve according to the calculating formula of following formula 2.Wherein, in following formula 2, h45 mean with
The average height of ear processed at 45 ° of directions 4 on the basis of the rolling direction, h0,90 mean on the basis of the rolling direction
0 ° and 90 ° of directions 4 at ear processed average height, hav. means the average height of whole measurement points.According to by 3 test films
The value of obtained earing rate (re), try to achieve the difference of maxima and minima (earing rate is poor).Earing rate difference is for less than 1% for examination
Material is determined as that well being determined as examination material higher than 1% is bad.
Re={ (h45-h0,90)/hav. } × 100 (%) ... (2)
【Table 3】
* the place outside prescribed limit of the invention
As shown in table 3, the composition of aluminium alloy plate, recrystallization rate, the difference of area occupation ratio and the length-width ratio of crystal grain of cube orientations
Meet defined embodiment No.1~7 of the present invention, the intensity of sheet is high (more than 250MPa), and rivet has excellent formability
(more than 1.45mm limit bulging height), the earing rate difference as low as less than 1% of plate width direction central portion and end.
In contrast, comparative example No.1, because Si contents are superfluous, the recrystallization rate of hot rolled plate is low, the rivet of sheet
Formability is poor.
For comparative example No.2 because Fe contents are few, the recrystallization rate of hot rolled plate is low, and the rivet formability of sheet is poor.
For comparative example No.3 because Cu contents are superfluous, intensity is too high, and the rivet formability of sheet is poor.In addition, compare
Example No.3 because the 4th frame pressure logarithmic strain and 3 frames purpose pressure logarithmic strain difference (ε 4- ε 3) it is small,
The area occupation ratio difference of the cube orientations of hot rolled plate is big, and the earing rate difference of sheet is big.
For comparative example No.4 because Mn contents are few, the recrystallization rate of hot rolled plate is low, and the rivet formability of sheet is poor.
For comparative example No.5 because Mn contents are superfluous, the rivet formability of sheet is poor.
Comparative example No.6 is because Mg contents are few, the low intensity of sheet.
For comparative example No.7 because Mg contents are superfluous, the intensity of sheet is too high, and rivet formability is poor.In addition, compare
Example No.7 is because of total (the ε 1+ ε 2) of the pressure logarithmic strain of the first frame and the second frame is excessive, and the pressure of the 4th frame
The difference (ε 4- ε 3) of logarithmic strain and the pressure logarithmic strain of the 3rd frame is too small, so the area occupation ratio of the cube orientations of hot rolled plate
Poor big, the earing rate difference of sheet becomes big.
Total (the ε 1+ ε 2) of the pressure logarithmic strain of its first frame of comparative example 8~12 and the second frame is excessive, or/and
The difference (ε 4- ε 3) that the mesh of the pressure logarithmic strain of 4th frame and the 3rd 3 frame depresses logarithmic strain is too small.Therefore, comparative example
The area occupation ratio difference of the cube orientations of 8~12 its hot rolled plate is big, and the earing rate difference of sheet becomes big.
For comparative example 13 because cold rolling rate is low, the length-width ratio of crystal grain diameter is small, the insufficient prosperity of worked structure, sheet
Earing rate difference it is big.
The present invention is illustrated referring additionally to specific embodiment in detail, but do not depart from the spirit and scope of the present invention to add
With various changes and modifications, this will be apparent that for practitioner.
The application is based on Japanese patent application (patent application 2015-042375) filed in 4 days March in 2015, its content
It is incorporated into this as reference.
【Industrial applicability】
The negative pressure cover aluminium alloy plate of the present invention, the strength of materials is high, the compressive resistance that can be needed, rivet shaping
Property go out it is excellent, can plate width direction reduce earing rate it is poor, the aluminium pot as two-piece type is useful.
【Symbol description】
1 test film
2nd, 3 punch die
4 drifts
Claims (2)
1. a kind of negative pressure cover aluminium alloy plate, it is characterised in that contain Si：More than 0.05 mass % and 0.40% mass with
Under, Fe：More than 0.10 mass % and below 0.50 mass %, Mn：More than 0.10 mass % is simultaneously less than 0.80 mass %, Mg：
More than 1.0 mass % and below 3.5 mass %, surplus is made up of Al and inevitable impurity, and the plate after hot rolling is tied again
Brilliant rate is more than 90%, and the central portion in plate width direction and end, the measurement section parallel with rolling direction from plate surface
To 1/4 thickness of thickness of slab set tissue when, the central portion cube orientation area occupation ratio and end cube orientation area
The difference of rate is less than 10%, and the length-width ratio of the crystal grain on the surface of the plate after cold rolling is more than 5.
2. negative pressure cover aluminium alloy plate according to claim 1, it is characterised in that also contain Cu：Less than 0.40% makees
For alloying component.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015-042375 | 2015-03-04 | ||
| JP2015042375A JP6058050B2 (en) | 2015-03-04 | 2015-03-04 | Aluminum alloy plate for negative pressure can lid |
| PCT/JP2016/054429 WO2016140054A1 (en) | 2015-03-04 | 2016-02-16 | Aluminum alloy sheet for negative-pressure can lids |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107406923A true CN107406923A (en) | 2017-11-28 |
Family
ID=56844762
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680013102.4A Pending CN107406923A (en) | 2015-03-04 | 2016-02-16 | Negative pressure cover aluminium alloy plate |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP6058050B2 (en) |
| KR (1) | KR20170110123A (en) |
| CN (1) | CN107406923A (en) |
| WO (1) | WO2016140054A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108385002A (en) * | 2018-04-18 | 2018-08-10 | 中铝瑞闽股份有限公司 | A kind of Aluminum Bottle screw lid aluminium alloy strips and preparation method thereof |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111372770B (en) * | 2017-10-30 | 2021-10-26 | 日本制铁株式会社 | Composite board |
| KR102559606B1 (en) * | 2018-08-31 | 2023-07-24 | 가부시키가이샤 유에이씨제이 | aluminum alloy plate |
| JP2023131622A (en) | 2022-03-09 | 2023-09-22 | 株式会社Uacj | Aluminum alloy sheet for can lid |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001073106A (en) * | 1999-09-03 | 2001-03-21 | Sky Alum Co Ltd | Manufacture of aluminum alloy hard sheet for can-top |
| JP2001214248A (en) * | 2000-01-28 | 2001-08-07 | Sky Alum Co Ltd | Method for producing aluminum alloy hard sheet for can lid |
| JP2004339604A (en) * | 2003-04-25 | 2004-12-02 | Sumitomo Light Metal Ind Ltd | Aluminum alloy sheet for can end with excellent anisotropy, and its manufacturing method |
| JP2007131920A (en) * | 2005-11-11 | 2007-05-31 | Furukawa Sky Kk | Aluminum alloy sheet having small and stable earing rate in sheet-width direction for can lid, and manufacturing method therefor |
| CN101115855A (en) * | 2005-03-25 | 2008-01-30 | 株式会社神户制钢所 | Aluminum alloy sheet with excellent high-temperature property for bottle can |
| CN103014445A (en) * | 2012-12-27 | 2013-04-03 | 亚洲铝业（中国）有限公司 | 5052 aluminum alloy end stock substrate and production method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4392263B2 (en) * | 2004-02-12 | 2009-12-24 | 株式会社神戸製鋼所 | Aluminum alloy plate for packaging container end and manufacturing method thereof |
| JP2006257470A (en) * | 2005-03-16 | 2006-09-28 | Furukawa Sky Kk | Method for manufacturing aluminum alloy sheet for can lid |
| JP5898426B2 (en) * | 2011-07-25 | 2016-04-06 | 株式会社Uacj | Aluminum alloy plate for negative pressure can lid and manufacturing method thereof |
-
2015
- 2015-03-04 JP JP2015042375A patent/JP6058050B2/en not_active Expired - Fee Related
-
2016
- 2016-02-16 WO PCT/JP2016/054429 patent/WO2016140054A1/en active Application Filing
- 2016-02-16 KR KR1020177024487A patent/KR20170110123A/en active IP Right Grant
- 2016-02-16 CN CN201680013102.4A patent/CN107406923A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001073106A (en) * | 1999-09-03 | 2001-03-21 | Sky Alum Co Ltd | Manufacture of aluminum alloy hard sheet for can-top |
| JP2001214248A (en) * | 2000-01-28 | 2001-08-07 | Sky Alum Co Ltd | Method for producing aluminum alloy hard sheet for can lid |
| JP2004339604A (en) * | 2003-04-25 | 2004-12-02 | Sumitomo Light Metal Ind Ltd | Aluminum alloy sheet for can end with excellent anisotropy, and its manufacturing method |
| CN101115855A (en) * | 2005-03-25 | 2008-01-30 | 株式会社神户制钢所 | Aluminum alloy sheet with excellent high-temperature property for bottle can |
| JP2007131920A (en) * | 2005-11-11 | 2007-05-31 | Furukawa Sky Kk | Aluminum alloy sheet having small and stable earing rate in sheet-width direction for can lid, and manufacturing method therefor |
| CN103014445A (en) * | 2012-12-27 | 2013-04-03 | 亚洲铝业（中国）有限公司 | 5052 aluminum alloy end stock substrate and production method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108385002A (en) * | 2018-04-18 | 2018-08-10 | 中铝瑞闽股份有限公司 | A kind of Aluminum Bottle screw lid aluminium alloy strips and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20170110123A (en) | 2017-10-10 |
| JP2016160511A (en) | 2016-09-05 |
| WO2016140054A1 (en) | 2016-09-09 |
| JP6058050B2 (en) | 2017-01-11 |
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Application publication date: 20171128 |