CN109385560A - It is stamping with aluminium alloy plate, its manufacturing method and its to strike out body - Google Patents

It is stamping with aluminium alloy plate, its manufacturing method and its to strike out body Download PDF

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Publication number
CN109385560A
CN109385560A CN201811202625.0A CN201811202625A CN109385560A CN 109385560 A CN109385560 A CN 109385560A CN 201811202625 A CN201811202625 A CN 201811202625A CN 109385560 A CN109385560 A CN 109385560A
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China
Prior art keywords
mass
aluminium alloy
less
temperature
stamping
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Chinese (zh)
Inventor
中村贵彦
增田哲也
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Kobe Steel Ltd
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Kobe Steel Ltd
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Priority to JP2013081149 priority Critical
Priority to JP2013-081149 priority
Application filed by Kobe Steel Ltd filed Critical Kobe Steel Ltd
Priority to CN201480018802.3A priority patent/CN105102645A/en
Publication of CN109385560A publication Critical patent/CN109385560A/en
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    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22FCHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • C22F1/05Changing 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 of the Al-Si-Mg type, i.e. containing silicon and magnesium in approximately equal proportions
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C21/00Alloys based on aluminium
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C21/00Alloys based on aluminium
    • C22C21/02Alloys based on aluminium with silicon as the next major constituent
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C21/00Alloys based on aluminium
    • C22C21/06Alloys based on aluminium with magnesium as the next major constituent
    • C22C21/08Alloys based on aluminium with magnesium as the next major constituent with silicon
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C21/00Alloys based on aluminium
    • C22C21/10Alloys based on aluminium with zinc as the next major constituent
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22FCHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • C22F1/043Changing 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 silicon as the next major constituent

Abstract

The present invention, which provides, a kind of stamping with aluminium alloy plate, its manufacturing method and its strikes out body, it is by containing mass %, Mg:0.3 of Si:0.4~1.5~1.0 mass %, surplus is made of the aluminium alloy that Al and inevitable impurity form, in the cornerwise length for the impression that Vickers is formed, relative to rolling direction be 0 ° cornerwise length L0 and the cornerwise length L45 for relative to rolling direction being 45 ° difference △ L, the ratio P (%) relative to the L0 is 2.0% or less.

Description

It is stamping with aluminium alloy plate, its manufacturing method and its to strike out body
The application is application number: 201480018802.3, the applying date: 2014.4.8, denomination of invention: " stamping to use aluminium Alloy sheets, its manufacturing method and its strike out body " PCT/JP2014/060202 application divisional application.
Technical field
It with aluminium alloy plate, its manufacturing method and its is struck out the present invention relates to stamping used in stamping processing Body.
Background technique
In order to realize automobile etc. Transport Machinery lightweight, substitute the steel that are used all the time, the aluminium of more light weight Alloy material is developed as exterior material purposes, and functionization is promoting.
The former material of the plate of automobile exterior as vehicle body, car door, mud guard etc., in aluminium alloy (hereinafter, also describing For " Al alloy ".) among, have studied intensity, the Al-Mg-Si system of excellent corrosion resistance 6000 is Al alloy.
Automobile exterior is generally shaped with component with punching formation, therefore for the plate of Al alloy, it is desirable that its punching press It has excellent formability.In Patent Documents 1 to 2, for such automobile exterior Al alloy material, add in terms of press formability With research.
In patent document 1, a kind of forming is disclosed with Al alloy sheets, be 6000 is in alloy, it is specified that metal Between compound partial size and density.
In patent document 2, a kind of Al alloy sheets are disclosed, be 6000 are in alloy, it is specified that collection inside plate It is combined and knits.
[existing technical literature]
[patent document]
[patent document 1] Japanese Laid-Open 2003-221637 bulletin
[patent document 2] Japanese Laid-Open 2009-173972 bulletin
In recent years, in order to cope with it is three-dimensional have the stamping of the shape of depth and the complicated exterior material of shape, For Al alloy sheets, it is desirable that superior bulging.In the technology disclosed in above-mentioned patent document, it is difficult to sufficiently meet this The requirement of sample.
Summary of the invention
The present invention is formed in view of the above circumstances, and project is, striking out for depth can be coped with by providing one kind Excellent stamping of the press formability of shape is with aluminium alloy plate and its strikes out body.In addition, it is excellent to be to provide press formability The different stamping manufacturing method with aluminium alloy plate.
The present inventors are in order to realize the raising of bulging, other than the composition of Al alloy sheets, for the group of alloy sheets Texture, which is made etc., also to be studied, and result thinks, it is important that the extensibility that swells does not have direction interdependence, that is, no matter punching press The prolonging direction of plate when forming is which direction can correspond to, and in other words, isotropism when exactly shaping is excellent.
The manufacturing condition of the milled sheet with isotropic Al alloy is studied when therefore, for forming, result It, can be with by being allowed to imperceptibly recrystallize in being set to hot-rolled process after annealing process it was found that in the state of making strain accumulation Eliminate the anisotropy of the crystalline texture in plate.In addition, it has been found that even across process thereafter, remains to access and maintain Isotropic Al alloy sheets of formability.
Also, it was found that isotropic index of the formability as Al alloy sheets, the effectively pressure of Vickers The ratio of cornerwise length of trace.
In addition, the excellent Al alloy sheets of isotropism when forming, not only the expansion height of bulging is big, but also earing rate Low, fine wrinkle is difficult to happen.It is moreover found that handled by the artificial aging of coating baking after stamping etc., intensity and bend The BH (baking hardenability) for taking intensity raising is also excellent, to reach the present invention.
That is, stamping use Al alloy sheets of the invention, have the characteristic that, by containing the mass % of Si:0.4~1.5, The mass % of Mg:0.3~1.0, surplus constitute Al alloy by Al and inevitable impurity and are constituted, and are formed in Vickers It is 0 ° of cornerwise length L0 relative to rolling direction in cornerwise length of impression, and is 45 ° relative to rolling direction Cornerwise length L45 poor △ L, for the L0 ratio P (%) be 2.0% or less.In addition, above-mentioned Al alloy, The mass of the Si:0.6~1.3 mass % of %, Mg:0.3~0.8 is preferably comprised, surplus is made of Al and inevitable impurity.
According to the composition, when by both quantitatively containing Si, Mg etc., making the artificial aging processing under solution strengthening and low temperature The precipitation for facilitating intensity raising is formed, and tensile strength etc. is improved.In addition, passing through the impression for meeting Vickers Cornerwise length standard, to have the isotropism in forming, press formability is excellent.
In addition, furthermore can also contain Cu:1.0 in constituting the stamping aluminium alloy with aluminium alloy plate of the invention Quality % hereinafter, containing Fe:0.5 mass % or less and Mn:0.5 mass % it is below at least any one, contain Cr:0.3 matter Measure % or less, Zr:0.3 mass % or less and Ti:0.3 mass % it is below at least any one, Zn: be limited in 0.5 mass % Below.
According to the composition, formability can be further improved.
The stamping manufacturing method with Al alloy sheets of the invention, which is characterized in that carry out following process in order: right Implement the heat treatment procedure that homogenizes of heat treatment of homogenizing in the ingot casting of the Al alloy with the composition;With the end temperature of hot rolling Degree implements the hot-rolled process of hot rolling for 300 DEG C of conditions below;Implement the annealing operation of annealing with 300~500 DEG C of temperature;? Cold rolling terminates the cold rolling process of 100 DEG C of temperature or less implementation cold rollings;The solution treatment work handled with 500 DEG C or more of temperature Sequence;And it is heated to the heating process of 70 DEG C or more of temperature.
Alternatively, the stamping manufacturing method with Al alloy sheets of the invention, which is characterized in that carry out following work in order Sequence: the heat treatment procedure that homogenizes of heat treatment of homogenizing is implemented for the ingot casting of the Al alloy with the composition;Implement hot rolling Hot-rolled process;Terminate the first cold rolling process of 100 DEG C of temperature or less implementation cold rollings in cold rolling;It is real with 300~500 DEG C of temperature Apply the intermediate annealing process of intermediate annealing;Terminate the second cold rolling process of 100 DEG C of temperature or less implementation cold rollings in cold rolling;With 500 DEG C or more the solution treatment process that is handled of temperature;And it is heated to the heating process of 70 DEG C or more of temperature.
In addition, above-mentioned Al alloy, preferably comprise mass %, Mg:0.3 of Si:0.6~1.3~0.8 mass %, surplus by Al and inevitable impurity are constituted.
In addition, in Al alloy, can also contain in the stamping manufacturing method with Al alloy sheets of the invention Cu:1.0 mass % hereinafter, containing in below Fe:0.5 mass % or less and Mn:0.5 mass % at least any one, contain In Cr:0.3 mass % or less, Zr:0.3 mass % or less and Ti:0.3 mass % or less at least any one, Zn: be limited in 0.5 mass % or less.
According to the manufacturing method of the composition, can from in the Al alloy manufacture forming formed it is each to The excellent stamping use Al alloy sheets of the same sex.
In addition, Al alloy punching formed body can be obtained by stamping stamping use Al alloy sheets of the invention.
Of the invention is stamping with Al alloy sheets, even there is the stamping of depth that can also correspond to, earing rate Small, resistance to fine wrinkle is also excellent.In addition, the stamping manufacturing method with Al alloy sheets of the invention, can be made into shape processing In the excellent Al alloy sheets of isotropism.
Detailed description of the invention
Fig. 1 is the manufacturing process for indicating the first embodiment of the stamping manufacturing method with aluminium alloy plate of the invention Flow chart.
Fig. 2 is the manufacturing process for indicating the second embodiment of the stamping manufacturing method with aluminium alloy plate of the invention Flow chart.
Fig. 3 is pair for being 0 ° relative to rolling direction for illustrating in the diagonal line for the impression that Vickers is formed The length L0 of linea angulata and relative to rolling direction be 45 ° cornerwise length L45 measurement method ideograph.
Fig. 4 is pair for being 0 ° relative to rolling direction for illustrating in the diagonal line for the impression that Vickers is formed The ideograph of the measurement method of the length L0 of linea angulata.
Fig. 5 is pair for being 45 ° relative to rolling direction for illustrating in the diagonal line for the impression that Vickers is formed The ideograph of the measurement method of the length L45 of linea angulata.
Fig. 6 is the sectional view for illustrating the test method in bulging test.
Symbol description
S1 casting process
S2 homogenizes heat treatment procedure
S3 hot-rolled process
S4 annealing operation
S4a intermediate annealing process
S5 cold rolling process
The first cold rolling process of S5a
The second cold rolling process of S5b
S6 solution treatment process
S7 heating process
Specific embodiment
Hereinafter, for it is of the invention it is stamping use aluminium alloy plate and its manufacturing method, based on specific embodiment plus With explanation.
The composition for constituting the stamping Al alloy with Al alloy sheets of the invention, containing Si:0.4~1.5 mass %, The mass % of Mg:0.3~1.0, surplus are made of Al and inevitable impurity.
Hereinafter, being illustrated for each element and its content that constitute Al alloy of the invention.
(the mass % of Si:0.4~1.5)
Si, being capable of shape in the artificial aging processing in a low temperature of solution strengthening and coating baking processing etc. together with Mg At the precipitation for facilitating intensity raising, for assigning (the surrender of intensity required for the exterior panel as automobile Intensity) it is necessary element.If the content of Si is lower than 0.4 mass %, the formation of precipitation is few, coating baking hardening (intensity) reduces.On the other hand, if the content of Si is higher than 1.5 mass %, coarse crystallization object and precipitate are formed, are struck out Shape and weldability reduce.Therefore, the content of Si is 0.4~1.5 mass %.Preferably 0.6~1.3 mass %.
(the mass % of Mg:0.3~1.0)
Mg, being capable of shape in the artificial aging processing in a low temperature of solution strengthening and coating baking processing etc. together with Si At the precipitation for facilitating intensity raising, for assigning (the surrender of intensity required for the exterior panel as automobile Intensity) on be necessary element.If the content of Mg is lower than 0.3 mass %, the formation of precipitation is few, coating baking hardening Property (intensity) reduce.On the other hand, if the content of Mg is higher than 1.0 mass %, coarse crystallization object and precipitate are formed, punching press Formability and weldability reduce.Therefore, the content of Mg is 0.3~1.0 mass %.Preferably 0.3~0.8 mass %.
Cu, Fe, Mn, Cr, Zr, Ti and Zn each element described below, it is not necessary to element, but be respectively provided with each special Function, therefore can be suitable for depending on the application and purpose adding use in the range of without departing from the upper limit.
(Cu:1.0 mass % or less)
Cu has the effect for promoting precipitation to be formed under conditions of the processing of the artificial aging of relatively low temperature short time Fruit, the Cu of solid solution are the elements that formability can be made to improve.In order to it is expected that above-mentioned effect, the content of Cu are preferably 0.1 matter Measure % or more.On the other hand, if the content of Cu is higher than 1.0 mass %, anti-stress-corrosion crack, filiform corrosion resistance and weldering Connecing property significantly deteriorates.Therefore, make Cu containing sometimes, the content of Cu is 1.0 mass % or less.Preferably 0.1~0.8 mass %.
(Fe:0.5 mass % or less)
Fe casting when and homogenize be heat-treated when, FeMnAl is made together with Mn6, the equal crystallization object of AlMnFeSi it is raw At, it works in hot rolling and when final solution treatment as recrystallization nucleus, miniaturization, set tissue for recrystal grain Randomization be effective element.If the content of Fe is higher than 0.5 mass %, coarse crystallization object is generated, press formability drop It is low.Therefore, make Fe containing sometimes, the content of Fe is 0.5 mass % or less.Preferably 0.1~0.3 mass %.
(Mn:0.5 mass % or less)
Mn casting when and homogenize be heat-treated when, FeMnAl is made together with Fe6, the equal crystallization object of AlMnFeSi it is raw At, it works in hot rolling and when final solution treatment as recrystallization nucleus, miniaturization, set tissue for recrystal grain Randomization be effective element.If the content of Mn is higher than 0.5 mass %, coarse crystallization object is generated, press formability drop It is low.When therefore, containing Mn, the content of Mn is 0.5 mass % or less.Preferably 0.1~0.4 mass %.
(Cr:0.3 mass % or less)
Cr generates dispersed granules (disperse phase) when homogenizing and being heat-treated, and is with the member for making crystal grain miniaturize this effect Element.If the content of Cr is higher than 0.3 mass %, coarse intermetallic compound is generated, and press formability and corrosion resistance reduce. Therefore, make Cr containing sometimes, the content of Cr is 0.3 mass % or less.Preferably 0.01~0.2 mass %.
(Zr:0.3 mass % or less)
Zr generates dispersed granules (disperse phase) when homogenizing and being heat-treated, and is with the member for making crystal grain miniaturize this effect Element.If the content of Zr is higher than 0.3 mass %, coarse intermetallic compound is generated, and press formability and corrosion resistance reduce. Therefore, make Zr containing sometimes, the content of Zr is 0.3 mass % or less.Preferably 0.05~0.2 mass %.
(Ti:0.3 mass % or less)
Ti miniaturize the crystal grain of ingot casting, is the element for improving press formability.If the content of Ti is higher than 0.3 matter % is measured, coarse crystallization object is formed, and press formability reduces.Therefore, make Ti containing sometimes, the content of Ti is 0.3 mass % or less. Preferably 0.01~0.2 mass %.
(Zn:0.5 mass % or less)
If the content of Zn is higher than 0.5 mass %, coarse intermetallic compound is generated, the formability drop of aluminium alloy plate Low, in addition corrosion resistance significantly reduces.Therefore, the content of Zn is limited in 0.5 mass % or less.
(inevitable impurity)
As the inevitable impurity other than above-mentioned Cu, Fe, Mn, Cr, Zr, Ti and Zn, can estimate have Sn, The element of Sc, Ni, C, In, Na, Ca, V, Bi, Sr etc., but allow to contain under the level for not damaging feature of the invention.Tool For body, total content of the element of Cu, Fe, Mn, Cr, Zr, Ti, Zn and inevitable impurity be preferably 1.0 mass % with Under.
Then, it is said below for characteristic required for the stamping alloy sheets with Al being made of above-mentioned Al alloy It is bright.
(ratio of cornerwise length of impression)
Vickers hardness is the measurement method for measuring the hardness of metal material described in JIS Z2244.It is by positive quadrangle The pressure head of the diamond of taper, with the test face of certain test load indentation sample, according to generated impression (recess) Size measures the test of the hardness of sample.Substantially square if overlooking impression, there are 2 diagonal lines.
It in the present invention, will be relative to cornerwise caused by the difference of the angle of rolling direction in Vickers Isotropic index of the difference of length, the formability as Al alloy sheets uses.
Specifically, in the cornerwise length for the impression that the stamping Vickers with Al alloy sheets is formed, Acquire relative to rolling direction be 45 ° or -45 ° (135 °) angle impression cornerwise length (L45), with relative to The poor △ L of cornerwise length (L0) of the impression for the angle that rolling direction is 0 ° or 90 °, for rolling direction in 0 ° or The ratio P (%) of cornerwise length (L0) of the impression of 90 ° of angle.
It is as follows if being indicated with formula.
P (%)=100 × | L45-L0 |/L0=100 × △ L/L0 ... (1)
Here, | L45-L0 | indicate the difference (absolute value) of L45 and L0.
In addition, making in the cornerwise length for the impression that Vickers is formed relative to 0 ° of rolling direction below Or cornerwise length (L0) of the impression of 90 ° of angle simplifies, and describes as " relative to 0 ° of rolling direction of cornerwise length Spend L0 ".
Equally, make in the cornerwise length for the impression that Vickers is formed relative to 45 ° of rolling direction below Or cornerwise length (L45) of the impression of the angle of -45 ° (135 °) simplifies, and describes as " relative to 45 ° of rolling direction Cornerwise length L45 ".
In the present invention, needing ratio P is 2.0% or less.
It is, in the cornerwise length for the impression that Vickers is formed, it is diagonal relative to 0 ° of rolling direction The poor △ L of the length L0 of line and cornerwise length L45 relative to 45 ° of rolling direction need the ratio P (%) of the L0 It to be 2.0% or less.
If ratio P is higher than 2.0%, the anisotropy in formability is big, and the bulging height increased in bulging is had any problem.
In order to make ratio P be in 2.0% hereinafter, needing above-mentioned in the Al alloy specifically formed, under The specific manufacturing condition stated releases the anisotropy of the crystalline texture of the inside of Al alloy sheets.
Cornerwise measurement of length method of impression is as follows.
About the impression that Vickers is formed, near the center of the width of sample, along rolling direction (direction RD) It is made.So that diagonal line is become the angle of 0 ° (90 °) or 45 ° (- 45 °) relative to rolling direction, so each sample is distinguished It leaves at impression at least each 3.The face of impression is left, the surface of Al alloy sheets can also be stayed in, cutting for Al alloy sheets can also be stayed in Face.
Cornerwise length of impression is from top for multiple impressions using microscope photographing photo, according to acquired Flat image, measure 2 cornerwise length of each impression, the average value as its measured value acquires.Vickers Load, can according to the hardness of sample and be suitable for setting.
Then, the stamping manufacturing method with Al alloy sheets of the invention is illustrated.
The manufacturing method of the present invention, the significant feature having is, in the state of making strain accumulation, by being set to Hot-roller Annealing operation after sequence is imperceptibly recrystallized, to eliminate the anisotropy of the crystalline texture in plate.
The stamping manufacturing method with Al alloy sheets of the invention, including following 2 embodiments.Fig. 1 is to indicate this The flow chart of the manufacturing process of the first embodiment of the stamping manufacturing method with Al alloy sheets of invention.Fig. 2 is to indicate The flow chart of the manufacturing process of the second embodiment of the stamping manufacturing method with Al alloy sheets of the invention.
The first embodiment > of < manufacturing method
The first embodiment of the stamping manufacturing method with Al alloy sheets of the invention, to carry out following work in order Sequence is characterized: for containing mass %, Mg:0.3 of Si:0.4~1.5~1.0 mass %, surplus is by Al and inevitable impurity The casting process that the Al alloy of composition is cast;The heat that homogenizes of heat treatment of homogenizing is implemented for the ingot casting of the Al alloy Treatment process;Implement the hot-rolled process of hot rolling under the conditions of the end temperature of hot rolling is 300 DEG C below;With 300~500 DEG C Temperature implements the annealing operation of annealing;Terminate the cold rolling process of 100 DEG C of temperature or less implementation cold rollings in cold rolling;With 500 DEG C or more The solution treatment process that is handled of temperature;And it is heated to the heating process of 70 DEG C or more of temperature.
In the first embodiment of the stamping manufacturing method with Al alloy sheets of the invention, the present invention is not being damaged Effect in the range of, can also add again it is as described below other than process, such as the additional cleaning, intermediate again in the process of midway The process of trimming, the leveling of deburring, segmentation etc. etc..In addition, can be followed about process and condition other than following special description Conventional method manufacture.Hereinafter, on one side referring to Fig.1, being illustrated on one side for the condition of each process.
(casting process S1)
Casting process S1 is melting, the stamping process that Al alloy cast ingot is made of Al alloy of casting.In founder In sequence, there is the melt of the Al alloy formed by melting, make the ingot casting of set shape.Melting, the side for casting Al alloy Method is not particularly limited, and uses conventionally known method.It is melted for example, being able to use sense melt furnace or reflection smelting furnace etc. Refining, is cast using continuous casting process and semi-continuous casting method.
(homogenize heat treatment procedure S2)
It is only when being cast, tissue is different and uneven according to position, therefore in order to become uniform group on the whole It knits and carries out the heat treatment procedure S2 that homogenizes.It homogenizes and is heat-treated start temperature, preferably 500~580 DEG C.When lower than 500 DEG C, Reaching uniform the time it takes causes productivity to reduce, if being higher than 580 DEG C, the fusing point decline for being segregated part causes part molten Change and occurs.
The heat treatment time that homogenizes is preferably 1~10 hour.If the heat treatment time that homogenizes is lower than 1 hour, exist inclined A possibility that analysis can not disappear.On the other hand, if being higher than 10 hours, productivity is reduced.
(hot-rolled process S3)
Hot-rolled process S3 is to implement hot rolling after the heat treatment procedure S2 that homogenizes in order to become set thickness Process.In the decline process of temperature, it is repeated until becoming set thickness.The start temperature of hot rolling is preferably 400~550 ℃.In order to reach set plate thickness with pressure number as few as possible, rolling carries out at high temperature.If the start temperature of hot rolling Low, then deformation drag is big, therefore rolls difficult.On the other hand, if the start temperature of hot rolling is excessively high, become surface it is coarse again The reason of crystallization, becomes the coarse reason of final product.
Hot rolling is same as the hot rolling of general aluminium, can be 30~50% in the hot-working rate (reduction ratio) of every a time It is carried out in the range of left and right.The reduction ratio of hot rolling is preferably 30~40%.This is because, by being carried out among this range, heat Processing thermal discharge when rolling tails off, and strain accumulation amount becomes larger.
The end temperature of the finishing operation of hot rolling is needed at 300 DEG C or less.More preferably 170~290 DEG C.If the knot of hot rolling Shu Wendu is higher than 300 DEG C, then the accumulation strained is insufficient, therefore will not imperceptibly recrystallize in annealing operation, only specific Crystalline orientation it is flourishing, glanced off on the direction being easily deformed, Al plate cannot be made to become the excellent tissue of isotropism.
(annealing operation S4)
Annealing operation S4 is the process annealed.In the finishing operation of hot-rolled process S3, because making the end of hot rolling Temperature is 300 DEG C hereinafter, so accumulating in the crystalline texture tissue of Al intralamellar part has strain.In annealing operation S4, do not having In the state that binding force applies, by discharging the strain, the upper strain in any direction of the crystalline texture tissue of Al intralamellar part is all very It is few, the high structure of isotropism can be become.
Annealing temperature needs to be 300~500 DEG C.When lower than 300 DEG C, there is a possibility that not recrystallizing, if being higher than 500 DEG C, then there is a possibility that coarsening occurs.Annealing time was preferably more than 0 second in the case where continuous oven and at 30 seconds Hereinafter, being preferably 5h or less in the case where batch furnace.If too long, coarsening occurs, and anisotropy becomes larger.Also Have, in order to which heating rate is fast, it is preferable to use be easy the continuous oven of fine recrystallization, makes 1 DEG C/sec of heating rate or more.
(cold rolling process S5)
Cold rolling process S5 is the process for implementing cold rolling.After annealing operation S4, one or many cold rollings are carried out, become uncommon The final plate thickness hoped.Cold working rate is preferably 40% or more.When cold working rate is lower than 40%, it is unable to fully obtain crystalline substance when solid solution Grain micronized effect.Cold rolling terminates temperature and needs for 100 DEG C hereinafter, preferably 80 DEG C or less.Cold rolling terminate temperature it is high when, strain Accumulation it is insufficient, can not imperceptibly be recrystallized in solution treatment process, only specific crystalline orientation is flourishing, is being easy to become It is glanced off on the direction of shape, cannot get isotropic tissue.Refer in addition, cold rolling terminates temperature in repeatedly progress cold rolling When, final cold rolling terminates temperature.
In addition, can also be carried out for the skin-pass of rectification plate flatness and for controlling after above-mentioned cold rolling The rolling for having used EDT (electric discharge textured: electric spark texturing) roll of surface roughness etc. it is low The cold rolling of working modulus.
(solution treatment process S6)
Solution treatment process S6 is for being dissolved Mg, Si, it is ensured that process required for the yield strength after baking.Solid solution Temperature needs to carry out with 500 DEG C or more of temperature, and preferably 500~570 DEG C.If solid solubility temperature is lower than 500 DEG C, there is solid solution A possibility that amount is insufficient, if being higher than 570 DEG C, there are the coarsening possibilities of eutectic melting and recrystallization grain.Solution time Preferably more than 0 second and at 60 seconds or less.When solution time is too long, effect is saturated and damages economy.Reach heating temperature In cooling later, if cooling velocity is slow, crystal boundary is easy that coarse Mg is precipitated2Si, Si etc., formability reduce, therefore preferably It is cooled down by water cooling (water quenching) etc..
(heating process S7)
Heating process S7 is that variable quantity caused by making room-temperature aging is reduced, it is ensured that the process of the yield strength after baking.Add Hot temperature needs to be 70 DEG C or more, preferably 70~150 DEG C.When lower than 70 DEG C of holdings, baking treated intensity rises small.If Higher than 150 DEG C, then initial strength is excessively high, and formability deteriorates.
The second embodiment > of < manufacturing method
The second embodiment of the stamping manufacturing method with Al alloy sheets of the invention, to carry out following work in order Sequence is characterized: for containing mass %, Mg:0.3 of Si:0.4~1.5~1.0 mass %, surplus is by Al and inevitable impurity The casting process that the Al alloy of composition is cast;The heat that homogenizes of heat treatment of homogenizing is implemented for the ingot casting of the Al alloy Treatment process;Implement the hot-rolled process of hot rolling;Terminate the first cold rolling process of 100 DEG C of temperature or less implementation cold rollings in cold rolling;With 300~500 DEG C of temperature implements the intermediate annealing process of intermediate annealing;Terminate 100 DEG C of temperature or less implementation cold rollings in cold rolling Second cold rolling process;The solution treatment process handled with 500 DEG C or more of temperature;And it is heated to 70 DEG C or more of temperature The heating process of degree.
It is of the invention not damaging in the second embodiment of the stamping manufacturing method with Al alloy sheets of the invention In the range of effect, can also add it is as described below other than process, such as on the way in process additional cleaning, centre are repaired again The process of trimming, the leveling of side, segmentation etc. etc..In addition, for process and condition other than following special description, it can be according to normal The manufacture of rule method.Hereinafter, being illustrated on one side for the condition of each process referring to Fig. 2 on one side.
In the second embodiment of manufacturing method, casting process S1, the heat treatment procedure S2 that homogenizes, solution treatment process The first embodiment of S6, its condition of heating process S7 and manufacturing method are general, omit the explanation about these processes.
(hot-rolled process S3)
In the second embodiment of manufacturing method, the hot-working rate (reduction ratio), start temperature and first when hot rolling are real It is identical to apply mode.The end temperature of finishing operation about hot rolling does not have the special provision upper limit, but goes out from the viewpoint of production efficiency Hair, preferably 400 DEG C or less.
(the first cold rolling process S5a)
Process S5a is cold worked, is to implement the process of cold rolling after the hot-rolled process S3.After hot-rolled process S3, into The one or many cold rollings of row become desired final plate thickness.Cold working rate is preferably 40% or more, and more preferably 50% or more. Cold rolling terminates temperature and needs for 100 DEG C hereinafter, preferably 80 DEG C or less.When being detached from these ranges, obtained not by intermediate annealing process To fine recrystallized structure.
(intermediate annealing process S4a)
Intermediate annealing process S4a is the process that carries out intermediate annealing after the first cold rolling process S5a.In the first Cold-roller In sequence S5a, strain accumulates in the crystalline texture tissue of Al intralamellar part.In intermediate annealing process S4a, applied in no binding force In the state of adding, by discharging the strain, the crystalline texture tissue of Al intralamellar part is upper in any direction to strain all seldom, Neng Goucheng For the high structure of isotropism.
Intermediate anneal temperature needs 300~500 DEG C.When lower than 300 DEG C, there is a possibility that not recrystallizing, if being higher than 500 DEG C, then there is a possibility that coarse grains occur.Preferably more than 0 second the case where intermediate annealing time, continuous oven and 30 Second is hereinafter, be preferably 5h or less in the case where batch furnace.If too long, coarse grains occur, anisotropy becomes larger.Also Have, in order to which heating rate is fast, it is preferable to use be easy the continuous oven of fine recrystallization, makes 1 DEG C/sec of heating rate or more.
(the second cold rolling process S5b)
Second cold rolling process S5b is to implement the process of cold rolling after intermediate annealing process S4a.Terminate in annealing operation S4 Afterwards, one or many cold rollings are carried out, desired final plate thickness is become.Cold working rate is preferably 40% or more.Cold working rate is lower than When 40%, it is unable to fully obtain crystal grain micronized effect when solid solution.Cold rolling terminates temperature and needs for 100 DEG C hereinafter, preferably 80 DEG C or less.Cold rolling terminate temperature it is high when, the accumulation of strain is insufficient, can not imperceptibly be recrystallized in solution treatment process, Only specific crystalline orientation is flourishing, and glances off on the direction being easily deformed, and cannot get isotropic tissue.Also Have, cold rolling terminates temperature, refers to when carrying out multiple cold rolling, the temperature that final cold rolling terminates.
After alternatively, it is also possible to above-mentioned cold rolling, carry out for the skin-pass of rectification plate flatness and for control table The low of the rolling for having used EDT (electric discharge textured: electric spark texturing) roll of surface roughness etc. adds The cold rolling of work rate.
It is stamping obtained from manufacturing process by each process more than having to use Al alloy sheets, as stamping With Al alloy sheets, there can be excellent press formability.
[embodiment]
Next, it illustrates the present invention in embodiment.In addition, the present invention is not limited by embodiment described below.
(sample number 1~27)
Sample number 1~27 is the aluminium alloy plate manufactured by the first embodiment of manufacturing method.
For the Al alloy (alloy label A~Z) of composition shown in aftermentioned table 1, pass through the well known casting of DC casting etc. It makes method and carries out melting, casting, become the ingot casting of thickness 600mm.For the ingot casting, implement 550 DEG C, at 5 hours heat that homogenizes Reason.In implementing the heat treatment ingot casting, for sample number 1~25 and sample number 27, with 500 DEG C of hot rolling start temperature, 30~40% rolling rate implements hot rolling repeatedly, reduces plate thickness, in the case where hot rolling terminates 270 DEG C of temperature, becomes the heat of plate thickness 3mm Roll plate.For sample number 26, hot rolling is terminated into temperature and becomes 285 DEG C, becomes the hot rolled plate of plate thickness 3mm.
Then, the annealing of 500 DEG C, 20 seconds is implemented using continuous oven for sample number 1~25.For sample number 26 Using continuous oven, implement the annealing of 350 DEG C, 20 seconds.Batch furnace is used for sample number 27, implements 400 DEG C, 4h moves back Fire.Thereafter, for sample number 1~27, cold rolling is carried out with 66% cold working rate (reduction ratio), becomes cold rolling and terminates temperature and be The cold-reduced sheet of 90 DEG C of plate thickness 1mm.Next, heating using continuous oven with 300 DEG C/min of heating rate, 550 DEG C are reached At the time of keep 20 seconds, carry out solution treatment.Later, put into immediately in the water of room temperature, with 100 DEG C/sec of cooling velocity with On chilling quenched.Finally, the heat treatment kept for 2 hours with 100 DEG C is obtained with 0.6 DEG C/h of progress slow cooling To for test material.In addition, using ラ イ Application essence machine Co. Ltd. system digital temperature meter in the measurement of the temperature of Al alloy sheets TC-950 (similarly hereinafter).
(sample number 28~32)
Sample number 28~32 is the aluminium alloy plate manufactured according to the second embodiment of manufacturing method.
Among the Al alloy of the composition shown in aftermentioned table 1, using the alloy of the composition of alloy label A, E, M, compiled with sample Numbers 1,5,13 same, becomes the ingot castings of thickness 600mm by the well known casting melting of DC casting etc., casting.For The ingot casting implements the heat treatment that homogenizes of 550 DEG C, 5 hours.In the ingot casting for implementing the heat treatment, for sample number 28~ 30 and sample number 32, hot rolling is implemented repeatedly with the rolling rate of 500 DEG C of hot rolling start temperature, 30~40%, reduces plate thickness, Hot rolling terminates to become the hot rolled plate of plate thickness 7mm at 250 DEG C of temperature.For sample number 31, hot rolling is terminated into temperature and becomes 330 DEG C, become the hot rolled plate of plate thickness 7mm.
Next, terminating temperature respectively with 90 DEG C of cold rollings below described in aftermentioned table 2, with 57% cold working rate (pressure Lower rate) the first cold rolling is carried out, become the cold-reduced sheet of plate thickness 3mm.Thereafter, sample number 28~31 is implemented using continuous oven 500 DEG C, intermediate annealing in 20 seconds.The intermediate annealing of 400 DEG C, 5h is implemented using batch furnace for sample number 32.Later, For sample number 28~32, terminate temperature respectively with 90 DEG C of cold rollings below described in table 2, with 67% cold working rate (pressure Lower rate) the second cold rolling is carried out, become the cold-reduced sheet of plate thickness 1mm.Then, using continuous oven, added with 300 DEG C/min of heating rate Heat is kept for 20 seconds at the time of reaching 550 DEG C, carries out solution treatment.Later, it puts into immediately in the water of room temperature, with cooling speed The chilling of 100 DEG C/sec of degree or more is quenched.Finally, the heat treatment for carrying out being kept for 2 hours with 100 DEG C, with 0.6 DEG C/h Slow cooling is carried out, is obtained for test material.
(sample number 33~40)
Sample number 33, other than making in sample number 30 first and second cold rolling terminate 120 DEG C of temperature, with Same condition is processed with sample number 30.
Sample number 34, in addition to making other than first cold rolling terminates 120 DEG C of temperature in sample number 30, to be compiled with sample Number 30 same conditions are processed.
Sample number 35, in addition to making other than second cold rolling terminates 120 DEG C of temperature in sample number 30, to be compiled with sample Number 30 same conditions are processed.
Sample number 36, other than 330 DEG C of end temperature that make hot-rolled process in sample number 13, with sample The same condition of number 13 is processed.
Sample number 37, other than making 13 cold rolling of sample number terminate 110 DEG C of temperature, with same with sample number 13 Deng condition processed.
Sample number 38, other than without the intermediate annealing process in sample number 30, with sample number 30 Same condition is processed.
Sample number 39, using batch furnace, is implemented by 250 DEG C of end temperature in addition to making 1 hot-rolled process of sample number 280 DEG C, other than the annealing of 4h, processed with the condition same with sample number 1.
For sample number 40 in addition to making 250 DEG C of end temperature of hot-rolled process in sample number 5, annealing temperature is 600 DEG C In addition, it is processed with the same condition of sample number 5.
In each sample number, the evaluation condition of the characteristic of obtained Al alloy sheets after being placed 3 months after heating process It is as follows.
[ratio of cornerwise length of impression]
Attached drawing used below is illustrated the measurement method of the ratio of cornerwise length of impression.Fig. 3~5 are to use In explanation in the diagonal line for the impression that Vickers is formed, the cornerwise length for being 0 ° or 90 ° relative to rolling direction The ideograph of L0 and the measurement method for the cornerwise length L45 for being 45 ° or -45 ° (135 °) relative to rolling direction.
Fig. 3 indicates to form the example of the position of impression.In the edge rolling side of the sample extracted from the width direction center of plate To the center in the plate section in (direction RD), the feelings for the angle for being respectively 0 ° or 90 ° relative to rolling direction with regard to the diagonal line of impression The case where diagonal line of condition (A1~A3) and impression is relative to the angle that rolling direction is 45 ° or -45 ° (135 °) (B1~B3), Substantially square impression at least each 3 is left by Vickers.At this moment, the load of Vickers is 100g.
Using Co., Ltd. ミ Star ト ヨ society (Mitutoyo Corporation) Vickers hardness measuring device AAV-500 processed, With same device, it placed after heating process and mark the impression on the plate section for test material of 3 months thickness 1mm, use The microscopical automatic focusing function being integrated with same device shoots photo.
Fig. 4, Fig. 5 indicate to measure cornerwise an example by the photo of impression.It is cornerwise by 1 impression photo measurement 2 Length.The case where Fig. 4 is the angle that the diagonal line of impression is 0 ° or 90 ° relative to rolling direction.As relative to rolling direction Cornerwise length L0 that 0 ° and 90 ° of (direction RD) measures the length of a1 and a2 respectively, uses average value.Fig. 5 is pair of impression The case where linea angulata is relative to the angle that rolling direction is+45 ° or -45 ° (135 °).As relative to rolling direction (direction RD) 45 ° and -45 ° (135 °) of cornerwise length L45 measures the length of b1 and b2 respectively, uses average value.Respectively for extremely Impression measures at few 3, as the resulting the mean value calculation of cornerwise length.
It acquires the cornerwise length L0 for being 0 ° relative to rolling direction and is 45 ° cornerwise relative to rolling direction The poor △ L of length L45.The poor △ L for acquiring the length of the two, relative to the cornerwise length L0 for rolling direction being in 0 ° Ratio P (%).When the value is 2.0% or less, it is judged as that anisotropy is few, has excellent formability.
[tension test]
From for test plate (panel), make rolling direction longitudinally and punching JIS5 tension test sheet.According to JIS Z2241, with Shimadzu Scisakusho Ltd (SHIMADZU CORPORATION) console mode universal tensile testing machine AG-I processed into Row tension test, measurement tensile strength (MPa), tensile elongation (%) and 0.2% yield strength (MPa).Crosshead speed is It 5mm/ minutes, is carried out with certain speed until test film is broken, 5 measurements of progress, calculate average value respectively.Tensile strength is When 210MPa or more, when yield strength is 120MPa or more, when tensile elongation is 20% or more, it is judged as respectively excellent.
[AB yield strength]
So-called AB yield strength is exactly the artificial aging processing about coating baking after stamping etc., intensity The index of the BH (baking hardenability, coating baking hardening) to increase with yield strength.Punching press for Al alloy sheets Formed body after forming, the processing of the comparison low temperature by implementing coating baking etc., when being allowed to occur due to heating at this moment Effect hardening, intensity yield strength improve.It is indicated using the degree of the raising as index.
It is handled as artificial age-hardening, 2% stamping strain (stretch: stretching) is simulated with preparatory assign State, carry out heat treatment in 20 minutes with 170 DEG C.Thereafter, according to JIS Z2241, Shimadzu Scisakusho Ltd is used (SHIMADZU CORPORATION) console mode universal tensile testing machine AG-I processed carries out tension test, and 0.2% surrender of measurement is strong It spends (AB yield strength) (MPa).Crosshead speed is 5mm/ minutes, be broken until test film with certain speed, measurement 5 It is secondary, gone out with mean value calculation.When AB yield strength is 170MPa or more, it is judged as excellent.
[earing rate]
From for test plate (panel), punching goes out the disk-shaped test film (blank) of outer diameter 66mm, uses diameter for the test film The formed punch of 40mm implements deep-draw, makes the cupping of cupuliform diameter 40mm.The ear height processed of the cupping is measured, is based on following formula (2), It measures earing rate (0 °, 90 ° of earing rates) (%).In following formula (2), hX indicates the ear height processed of cupping.Moreover, h's is additional Digital X indicates the measurement position of deep-draw height, it is meant that the rolling direction relative to Al alloy sheets forms the position of X ° of angle.
Earing rate (%)=({ (h0+h90+h180+h270)-(h45+h135+h225+h315) }/{ 1/2 (h0+h90+ h180+h270+h45+h135+h225+h315)}〕×100…(2)
Earing rate be 3.5% or less when, relative to rolling direction be 0 °, the deflection in 90 ° of directions and 45 ° of directions it is not bright Significant difference is different, is judged as that formability, yield rate are excellent.
[bulging]
Fig. 6 is the sectional view for illustrating the measurement method of bulging testing machine.
Instead of the evaluation that whether there are cracks in the punch process of aluminium alloy plate, limit bulging height is evaluated by bulb bulging. As for test plate (panel) 13, it is cut into rolling direction length 110mm × rolling right angle orientation length 200mm., as shown in fig. 6, using folder This is fixed on for test plate (panel) 13 in internal diameter (aperture) 102.8mm, shoulder radius by tool (blank holder) 11 with certain pressure-pad-force Rd:5.0mm, outer diameter 220mm punch die 10 on.Then, the gap between punch die-fixture is pressed from both sides every the 1mm's with test film uniform thickness Gasket (illustration omitted), to be kept fixed on one side, on one side by the spherical punch 12 of bulb diameter 100mm (radius Rp:50mm) Bulging processing is carried out for being vertically pressed into for test plate (panel) surface, is acquired until observing the bulging height of crackle and necking down The limiting value of H.The judgement that the threshold value of bulging height H is 30mm or more is qualified.
[resistance to fine wrinkle]
Cutting relative to the size that the rolling direction for test material is 0 ° of direction is 40mm, and the size in 90 ° of directions is 200mm's Test film.After assigning 15% plastic strain on the direction in 90 ° relative to rolling direction, simulated automotive body panel Coating carries out trbasic zinc phosphate processing, then carries out cationic electrodeposition coating, then implementing to simulate coating baking hardening processing After annealing, visually observes plate surface and evaluated.Specific treatment conditions are as follows.Described impart in advance is answered Plate after change carries out the colloidal dispersion processing of titanium phosphate in order, is immersed in the fluorine-containing trbasic zinc phosphate bath of low concentration (50ppm) In trbasic zinc phosphate processing, form zinc phosphate coat in plate surface, then after carrying out cationic electrodeposition coating, implementation 170 DEG C × heat treatment in 20 minutes.
It is ◎ there is no the judgement of fine wrinkle in the coating surface, although there is fine wrinkle that more slight judgement occurs Be zero, the judgement that fine wrinkle significantly occurs be ×.
The evaluation result of sample number 1~25 is shown in table 1.In addition, the evaluation knot of sample number 1,5,13,26~40 Fruit is shown in table 2.It is formed shown in "-" in the composition of alloy of table 1, indicates the detection boundary in analytical equipment or less. In addition, among numerical value shown in table 1, table 2, the numerical value with underscore indicates that it is to be detached from claim 1 or claim 2~3 Numberical range numerical value.In addition, the sample number 1,5,13 of table 2 is identical as the sample number 1,5,13 of table 1.
Table 1
Table 2
As shown in table 1, what is be made of the defined Al alloy for meeting composition of alloy of the invention is stamping with Al alloy Plate (sample number 1~15) has tensile strength, yield strength, tensile elongation, AB yield strength, earing rate and bulging high Spend the excellent performance of any one physical property.On the other hand, it is struck out by be unsatisfactory for that defined Al alloy of the invention constitutes Shape Al alloy sheets (sample number 16~25), bulging height inequality.In addition, 17,18,20,21 its tensile strength of sample number, Performance more than any one among yield strength, tensile elongation, AB yield strength and earing rate is poor.
As shown in table 2, what is be made of the defined Al alloy for meeting the manufacturing method of the present invention is stamping with Al alloy Plate (sample number 1,5,13,26~32), have tensile strength, yield strength, tensile elongation, AB yield strength, earing rate, Bulging height and the excellent performance of any one physical property of fine wrinkle.Especially as manufacturing condition, by the knot for making cold rolling Shu Wendu be 100 DEG C hereinafter, and implement annealing operation or intermediate annealing process this process be applicable in, make bulging height etc. Performance is more excellent.In addition, sample number 13 and 27, sample number 30 and 32 just use continuous oven respectively in annealing operation The case where and compared using the case where batch furnace, no matter in the case of which kind of, can be accessed using a side of continuous oven It is stamping with Al alloy sheets with excellent properties.
On the other hand, although meeting the composition of Al alloy, defined Al of the invention is unsatisfactory for as manufacturing condition and is closed Stamping use Al alloy sheets (sample number 33~39) that gold is constituted, ratio P are above 2.0%, earing rate, bulging height It is poor with performance more than any one among fine wrinkle.Sample number 40 melts, no because annealing temperature is high when annealing Evaluation sample can be obtained.In sample number 33~35, using the second embodiment of manufacturing method, the first cold rolling terminates temperature Degree, the second cold rolling terminate temperature either or both be higher than 100 DEG C, the accumulation of strain is few, ratio P be higher than 2.0%, respectively to The same sex is insufficient.In sample number 36, using the first embodiment of manufacturing method, the end temperature of hot-rolled process is higher than 300 DEG C, the accumulation of strain is few, can not imperceptibly recrystallize, and ratio P is higher than 2.0%, and isotropism is insufficient.It is adopted in sample number 37 With the first embodiment of manufacturing method, cold rolling terminates temperature higher than 100 DEG C, and the accumulation of strain fine can not recrystallize less, Ratio P is higher than 2.0%, and isotropism is insufficient.In addition, sample number 38, does not carry out annealing operation and manufactures, it can not be imperceptibly Recrystallization, ratio P are higher than 2.0%, and isotropism is insufficient.Sample number 39 is moved back using the first embodiment of manufacturing method Fiery temperature is lower than 300 DEG C, and not fine recrystallization, ratio P is higher than 2.0%, and isotropism is insufficient.
In detail and illustrate the present invention referring to specific embodiment, but can not depart from the spirit and scope of the present invention and It is subject to various changes and modifications, this will be apparent that for practitioner.
The application is based on Japanese patent application (patent application 2013-081149), 2014 years filed on April 9th, 2013 Japanese patent application (patent application 2014-055180) filed in March 18, content reference herein are simultaneously quoted.
[industrial availability]
The former material of aluminium alloy plate of the invention, the plate of the automobile exterior as vehicle body, car door, mud guard etc. has With even there is the stamping excellent formability that can also be coped with of depth.

Claims (10)

1. a kind of stamping aluminium alloy plate, which is characterized in that by containing mass %, Mg:0.3 of Si:0.4~1.5~1.0 matter % is measured, surplus is made of the aluminium alloy that Al and inevitable impurity form,
In the cornerwise length for the impression that Vickers is formed, mutually in rolling direction for 0 ° of cornerwise length L0 And relative to the difference △ L for cornerwise length L45 that rolling direction is 45 °, the ratio P in terms of % relative to the L0 is 2.0% or less.
2. stamping aluminium alloy plate according to claim 1, which is characterized in that in the aluminium alloy, under also containing At least one of (a)~(d) is stated,
(a) Cu:1.0 mass % or less;
(b) below Fe:0.5 mass % or less and Mn:0.5 mass % at least any one;
(c) in Cr:0.3 mass % or less, Zr:0.3 mass % or less and Ti:0.3 mass % or less at least any one;
(d) Zn:0.5 mass % or less.
3. stamping aluminium alloy plate according to claim 1 or 2, which is characterized in that the aluminium alloy contains Si: 0.6~1.3 mass %, Mg:0.3~0.8 mass %, surplus are made of Al and inevitable impurity.
It 4. a kind of aluminium alloy strikes out body, stamping is rushed with aluminium alloy plate for of any of claims 1 or 2 Pressing formation forms.
It is stamping to carry out punching press with aluminium alloy plate for as claimed in claim 3 5. a kind of aluminium alloy strikes out body It shapes.
6. a kind of stamping manufacturing method with aluminium alloy plate, which is characterized in that carry out following process in order:
For containing mass %, Mg:0.3 of Si:0.4~1.5~1.0 mass %, surplus is made of Al and inevitable impurity The casting process that is cast of aluminium alloy;
The heat treatment procedure that homogenizes of heat treatment of homogenizing is implemented for the ingot casting of the aluminium alloy;
It is the hot-rolled process that 300 DEG C of conditions below implement hot rolling with the end temperature of hot rolling;
Implement the annealing operation of annealing with 300~500 DEG C of temperature;
Terminate the cold rolling process of 100 DEG C of temperature or less implementation cold rollings in cold rolling;
The solution treatment process handled with 500 DEG C or more of temperature;And
It is heated to the heating process of 70 DEG C or more of temperature.
7. a kind of stamping manufacturing method with aluminium alloy plate, which is characterized in that carry out following process in order:
For containing mass %, Mg:0.3 of Si:0.4~1.5~1.0 mass %, surplus is made of Al and inevitable impurity The casting process that is cast of aluminium alloy;
The heat treatment procedure that homogenizes of heat treatment of homogenizing is implemented for the ingot casting of the aluminium alloy;
Implement the hot-rolled process of hot rolling;
Terminate the first cold rolling process of 100 DEG C of temperature or less implementation cold rollings in cold rolling;
Implement the intermediate annealing process of intermediate annealing with 300~500 DEG C of temperature;
Terminate the second cold rolling process of 100 DEG C of temperature or less implementation cold rollings in cold rolling;
The solution treatment process handled with 500 DEG C or more of temperature;And
It is heated to the heating process of 70 DEG C or more of temperature.
8. the stamping manufacturing method with aluminium alloy plate according to claim 6 or 7, which is characterized in that the aluminium closes Also contain at least one of following (a)~(d) in gold,
(a) Cu:1.0 mass % or less;
(b) below Fe:0.5 mass % or less and Mn:0.5 mass % at least any one;
(c) in Cr:0.3 mass % or less, Zr:0.3 mass % or less and Ti:0.3 mass % or less at least any one;
(d) Zn:0.5 mass % or less.
9. the stamping manufacturing method with aluminium alloy plate according to claim 6 or 7, which is characterized in that the aluminium closes Gold contains mass %, Mg:0.3 of Si:0.6~1.3~0.8 mass %, and surplus is made of Al and inevitable impurity.
10. the stamping manufacturing method with aluminium alloy plate according to claim 8, which is characterized in that the aluminium alloy Containing Si:0.6~1.3 mass %, Mg:0.3~0.8 mass %, surplus is made of Al and inevitable impurity.
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