CN108291280A - Improved forging 7XXX aluminium alloys and preparation method thereof - Google Patents
Improved forging 7XXX aluminium alloys and preparation method thereof Download PDFInfo
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C21/00—Alloys based on aluminium
- C22C21/10—Alloys based on aluminium with zinc as the next major constituent
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- 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
- C22F1/053—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 zinc as the next major constituent
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Abstract
Entitled " improved fumed 7XXX aluminium alloys and preparation method thereof " of the invention.The invention discloses new forging 7xxx aluminium alloys.The new forging 7xxx aluminium alloys generally comprise 3.75 weight % to 8.0 weight %Zn,1.25 weight % to 3.0 weight %Mg,The wherein described weight %Zn is more than the weight %Mg,0.35 weight % to 1.35 weight %Cu,0.04 weight % to 0.20 weight %V,0.06 weight % to 0.20 weight %Zr,The weight of wherein V+Zr≤0.23 %,0.01 weight % to 0.25 weight %Ti,At most 0.50 weight %Mn,At most 0.40 weight %Cr,At most 0.35 weight %Fe,And at most 0.25 weight %Si,Surplus is aluminium and impurity,The wherein described forging 7xxx aluminium alloys include any type impurity for being respectively not more than 0.10 weight %,And the wherein described forging 7xxx aluminium alloys include the impurity that total amount is not more than 0.35 weight %.
Description
Cross reference to related applications
Entitled " the WROUGHT 7XXX ALUMINUM that patent application claims are submitted on October 29th, 2015
The non-provisional United States of ALLOYS, AND METHODS FOR MAKING THE SAME " (forging 7XXX aluminium alloys and preparation method thereof)
The priority of patent application serial number 62/248,165, the complete disclosure of the temporary patent application is accordingly by reference simultaneously
Enter herein.
Present patent application and entitled " the IMPROVED 7XX ALUMINUM CASTING submitted on April 23rd, 2015
ALLOYS, AND METHODS FOR MAKING THE SAME " (improved 7XX ceralumins and preparation method thereof) is total to
It is related with the U.S. Patent application 14/694,109 possessed.
Background technology
Aluminium alloy can be used for a variety of applications.However, a kind of characteristic for improving aluminium alloy is still difficult without reducing another characteristic
To realize.For example it is difficult to enhance forging 7xxx aluminium alloys intensity or corrosion resistance without influencing other characteristics.
Invention content
In broad terms, present patent application is related to improved forging 7xxx aluminium alloys and the method for producing the alloy.
New forging 7xxx aluminium alloys can realize such as intensity, corrosion resistance, fatigue failure resistance and quenching insensitivity and other spies
Property in improvement combination both at least.
New forging 7xxx aluminium alloys generally comprise (and in some cases substantially by following material composition or by following
Material composition) as the zinc (Zn) of main alloy element, magnesium (Mg), copper (Cu), vanadium (V), zirconium (Zr) and titanium (Ti), and optionally
It is aluminium (Al), iron (Fe), silicon (Si) and inevitable impurity that, which there be manganese (Mn) and/or chromium (Cr), surplus in ground, is determined as follows
Justice.Some embodiments of new forging 7xxx aluminium alloys composition are shown in Figure 1.
For zinc, new forging 7xxx aluminium alloys generally comprise 3.75 weight % to 8.0 weight %Zn.In an embodiment party
In case, new forging 7xxx aluminium alloys include to be not more than 7.5 weight %Zn.In another embodiment, new forging 7xxx aluminium closes
Gold is comprising no more than 7.0 weight %Zn.In yet another embodiment, new forging 7xxx aluminium alloys include to be not more than 6.5 weights
Measure %Zn.In another embodiment, new forging 7xxx aluminium alloys include to be not more than 6.0 weight %Zn.In another implementation
In scheme, new forging 7xxx aluminium alloys include to be not more than 5.5 weight %Zn.In another embodiment, new forging 7xxx aluminium
Alloy includes to be not more than 5.0 weight %Zn.In another embodiment, new forging 7xxx aluminium alloys include to be not more than 4.75 weights
Measure %Zn.In one embodiment, new forging 7xxx aluminium alloys include at least 4.0 weight %Zn.In another embodiment
In, new forging 7xxx aluminium alloys include at least 4.25 weight %Zn.In yet another embodiment, new forging 7xxx aluminium alloy packets
Containing at least 4.35 weight %Zn.
New forging 7xxx aluminium alloys generally comprise the magnesium within the scope of 1.25 weight % to 3.0 weight %Mg.Implement at one
In scheme, new forging 7xxx aluminium alloys include to be not more than 2.75 weight %Mg.In another embodiment, new forging 7xxx aluminium
Alloy includes to be not more than 2.5 weight %Mg.In yet another embodiment, new forging 7xxx aluminium alloys include to be not more than 2.25 weights
Measure %Mg.In another embodiment, new forging 7xxx aluminium alloys include to be not more than 2.0 weight %Mg.In another implementation
In scheme, new forging 7xxx aluminium alloys include to be not more than 1.8 weight %Mg.In one embodiment, new forging 7xxx aluminium closes
Gold includes at least 1.35 weight %Mg.In another embodiment, new forging 7xxx aluminium alloys include at least 1.40 weight %
Mg.In yet another embodiment, new forging 7xxx aluminium alloys include at least 1.45 weight %Mg.In another embodiment
In, new forging 7xxx aluminium alloys include at least 1.50 weight %Mg.
In some embodiments, the amount of zinc and magnesium can be restricted (for example, to improve corrosion resistance).Therefore, one
In a embodiment, the combined amount of zinc and magnesium in new forging 7xxx aluminium alloys can be not more than 7.0 weight % (that is, weight %Zn+
The weight % of weight %Mg≤7.0).In another embodiment, the combined amount of the zinc in new forging 7xxx aluminium alloys and magnesium is not
More than 6.75 weight % (that is, weight %Zn+ weight %Mg≤6.75 weight %).In yet another embodiment, new forging
The combined amount of zinc and magnesium in 7xxx aluminium alloys is no more than 6.50 weight % (that is, the weight %Zn+ weight weights of %Mg≤6.50
Measure %).In another embodiment, the combined amount of the zinc in new forging 7xxx aluminium alloys and magnesium is not more than 6.25 weight %
(that is, weight %Zn+ weight %Mg≤6.25 weight %).In yet another embodiment, the zinc in new forging 7xxx aluminium alloys
It is not more than 6.00 weight % (that is, weight %Zn+ weight %Mg≤6.00 weight %) with the combined amount of magnesium.
New forging 7xxx aluminium alloys generally comprise copper and in the range of 0.35 weight % to 1.35 weight %Cu, and its
The amount of middle magnesium is more than the amount of copper.As follows, copper can promote for example improved corrosion resistance (for example, improve SCC resistances) and/
Or intensity.In one embodiment, new forging 7xxx aluminium alloys include to be not more than 1.15 weight %Cu.In another embodiment party
In case, new forging 7xxx aluminium alloys include to be not more than 1.00 weight %Cu.In yet another embodiment, new forging 7xxx aluminium closes
Gold is comprising no more than 0.95 weight %Cu.In another embodiment, new forging 7xxx aluminium alloys include to be not more than 0.90 weight
Measure %Cu.In yet another embodiment, new forging 7xxx aluminium alloys include to be not more than 0.85 weight %Cu.In another implementation
In scheme, new forging 7xxx aluminium alloys include to be not more than 0.80 weight %Cu.In one embodiment, new forging 7xxx aluminium closes
Gold includes at least 0.40 weight %Cu.In another embodiment, new forging 7xxx aluminium alloys include at least 0.45 weight %
Cu.In yet another embodiment, new forging 7xxx aluminium alloys include at least 0.50 weight %Cu.In another embodiment
In, new forging 7xxx aluminium alloys include at least 0.55 weight %Cu.In yet another embodiment, new forging 7xxx aluminium alloy packets
Containing at least 0.60 weight %Cu.
New forging 7xxx aluminium alloys generally comprise 0.04 weight % to 0.20 weight %V.As follows, vanadium can promote for example
Improved corrosion resistance and/or quenching insensitivity.In one embodiment, new forging 7xxx aluminium alloys include and are not more than
0.18 weight %V.In another embodiment, new forging 7xxx aluminium alloys include to be not more than 0.16 weight %V.At another
In embodiment, new forging 7xxx aluminium alloys include to be not more than 0.15 weight %V.In another embodiment, new forging
7xxx aluminium alloys include to be not more than 0.14 weight %V.In yet another embodiment, new forging 7xxx aluminium alloys include and are not more than
0.13 weight %V.In another embodiment, new forging 7xxx aluminium alloys include to be not more than 0.12 weight %V.At another
In embodiment, new forging 7xxx aluminium alloys include to be not more than 0.11 weight %V.In one embodiment, new forging 7xxx
Aluminium alloy includes at least 0.05 weight %V.In another embodiment, new forging 7xxx aluminium alloys include at least 0.06 weight
Measure %V.In yet another embodiment, new forging 7xxx aluminium alloys include at least 0.07 weight %V.In another embodiment
In, new forging 7xxx aluminium alloys include at least 0.08 weight %V.
New forging 7xxx aluminium alloys generally comprise 0.06 weight % to 0.20 weight %Zr.As shown in following data, vanadium and
The combination of zirconium can promote for example improved fatigue failure resistance trait.In one embodiment, new forging 7xxx aluminium alloy packets
Containing no more than 0.18 weight %Zr.In another embodiment, new forging 7xxx aluminium alloys include to be not more than 0.16 weight %
Zr.In yet another embodiment, new forging 7xxx aluminium alloys include to be not more than 0.15 weight %Zr.In another embodiment
In, new forging 7xxx aluminium alloys include to be not more than 0.14 weight %Zr.In yet another embodiment, new forging 7xxx aluminium alloys
Including no more than 0.13 weight %Zr.In one embodiment, new forging 7xxx aluminium alloys include at least 0.07 weight %Zr.
In another embodiment, new forging 7xxx aluminium alloys include at least 0.08 weight %Zr.
Vanadium should be controlled plus the total amount of zirconium to limit the constituent particle of high-volume fractional (for example, high-volume fractional
Al3Zr、Al23V4、Al7V and/or Al10V constituent particles) formation.In one embodiment, vanadium does not surpass plus the total amount of zirconium
Cross 0.23 weight %V+Zr.In another embodiment, vanadium is no more than 0.22 weight %V+Zr plus the total amount of zirconium.Another
In a embodiment, vanadium is no more than 0.21 weight %V+Zr plus the total amount of zirconium.In another embodiment, vanadium is plus zirconium
Total amount is no more than 0.20 weight %V+Zr.In one embodiment, Al3Zr、Al23V4、Al7V and Al10V constituent particles it is total
Volume fraction is no more than 0.07%.Pandat can for example be passed throughTMSoftware and PanAluminum thermodynamic datas library
(CompuTherm LLC, 437S.Yellowstone Dr.Suite 217, Madison, WI, USA) determines these constituent particles
Total volume fraction.In one embodiment, Al3Zr、Al23V4、Al7V and Al10The total volume fraction of V constituent particles does not surpass
Cross 0.06%.In another embodiment, Al3Zr、Al23V4、Al7V and Al10The total volume fraction of V constituent particles is no more than
0.05%.In yet another embodiment, Al3Zr、Al23V4、Al7V and Al10The total volume fraction of V constituent particles is no more than
0.04%.In another embodiment, Al3Zr、Al23V4、Al7V and Al10The total volume fraction of V constituent particles is no more than
0.03%.In yet another embodiment, Al3Zr、Al23V4、Al7V and Al10The total volume fraction of V constituent particles is no more than
0.02%.In another embodiment, Al3Zr、Al23V4、Al7V and Al10The total volume fraction of V constituent particles is no more than
0.01%.In yet another embodiment, Al3Zr、Al23V4、Al7V and Al10The total volume fraction of V constituent particles is no more than
0.005%.
New forging 7xxx aluminium alloys generally comprise 0.01 weight % to 0.25 weight %Ti.In one embodiment, newly
Forging 7xxx aluminium alloys include 0.01 weight % to 0.15 weight %Ti.In another embodiment, new forging 7xxx aluminium closes
Gold includes 0.01 weight % to 0.10 weight %Ti.In yet another embodiment, new forging 7xxx aluminium alloys include 0.01 weight
Measure % to 0.08 weight %Ti.In another embodiment, new forging 7xxx aluminium alloys include 0.02 weight % to 0.05 weight
Measure %Ti.Titanium can be with TiB2Or there is (for example, being exist at least partly at) in the form of TiC.
In some embodiments, new forging 7xxx aluminium alloys may comprise up to 0.50 weight %Mn.In the reality using manganese
It applies in scheme, new forging 7xxx aluminium alloys generally comprise 0.10 weight % to 0.50 weight %Mn.In one embodiment, newly
Forging 7xxx aluminium alloys include 0.10 weight % to 0.25 weight %Mn.In some embodiments, new forging 7xxx aluminium alloys
Substantially free of manganese, and in these embodiments, containing less than 0.10 weight %.Mn (that is,≤0.09 weight %Mn), it is all
Such as≤0.05 weight %Mn or≤0.04 weight %Mn or≤0.03 weight %Mn.
In some embodiments, new forging 7xxx aluminium alloys may comprise up to 0.40 weight %Cr.In the reality using chromium
It applies in scheme, new forging 7xxx aluminium alloys generally comprise 0.10 weight % to 0.40 weight %Cr.In one embodiment, newly
Forging 7xxx aluminium alloys include 0.10 weight % to 0.35 weight %Cr.In another embodiment, new forging 7xxx aluminium closes
Gold includes 0.10 weight % to 0.25 weight %Cr.In some embodiments, new forging 7xxx aluminium alloys are substantially free of chromium,
And in these embodiments, contains and be less than 0.10 weight %.Cr (that is,≤0.09 weight %Cr), such as≤0.05 weight
Measure %Cr or≤0.04 weight %Cr or≤0.03 weight %Cr.
New forging 7xxx aluminium alloys may include iron, at most 0.35 weight %Fe.In one embodiment, new forging 7xxx
Aluminium alloy includes to be not more than 0.25 weight %Fe.In another embodiment, new forging 7xxx aluminium alloys include and are not more than
0.20 weight %Fe.In yet another embodiment, new forging 7xxx aluminium alloys include to be not more than 0.15 weight %Fe.Another
In a embodiment, new forging 7xxx aluminium alloys include to be not more than 0.12 weight %Fe.In yet another embodiment, new forging
7xxx aluminium alloys include to be not more than 0.10 weight %Fe.In yet another embodiment, new forging 7xxx aluminium alloys include little
In 0.08 weight %Fe.In one embodiment, new forging 7xxx aluminium alloys include at least 0.01 weight %Fe.
New forging 7xxx aluminium alloys may include silicon, at most 0.25 weight %Si.In one embodiment, new forging 7xxx
Aluminium alloy includes to be not more than 0.20 weight %Si.In another embodiment, new forging 7xxx aluminium alloys include and are not more than
0.15 weight %Si.In yet another embodiment, new forging 7xxx aluminium alloys include to be not more than 0.10 weight %Si.Another
In a embodiment, new forging 7xxx aluminium alloys include to be not more than 0.08 weight %Si.In another embodiment, new forging
7xxx aluminium alloys include to be not more than 0.05 weight %Si.In one embodiment, new forging 7xxx aluminium alloys include at least
0.01 weight %Si.
The surplus of new forging 7xxx aluminium alloys is generally aluminium and inevitable impurity.In one embodiment, new forging
7xxx aluminium alloys processed include the respective any type impurity (being measured on the basis of element) for being not more than 0.10 weight %, and these
Total combined amount of impurity in new forging 7xxx aluminium alloys be no more than 0.35 weight % (that is, respectively≤0.10 weight % it is any
A kind of impurity, the weight % of and total impurities≤0.35).In another embodiment, each impurity is individually in new forging
It is no more than 0.05 weight % in 7xxx aluminium alloys, and total combined amount of impurity is no more than 0.15 weight in new forging 7xxx aluminium alloys
Measure % (that is, respectively≤0.05 any type impurity of weight %, the weight % of and total impurities≤0.15).In another embodiment
In, each these impurity is individually no more than 0.03 weight %, and total group of these impurity in new forging 7xxx aluminium alloys
Resultant in new forging 7xxx aluminium alloys be no more than 0.10 weight % (that is, respectively≤0.03 weight % any type impurity, and
The weight % of total impurities≤0.10).
New forging 7xxx aluminium alloys as described herein can be cast (for example, as ingot casting or billet), then be homogenized, so
After be thermally processed into intermediate or final form (for example, being cold worked after hot working when hot-working generates intermediate form).
In one embodiment, hot-working is forging.In one embodiment, forging generates formed product, such as wheel product.
In another embodiment, hot-working is rolling or squeezes out.It, can be by new alloy after hot-working (and any optional cold working)
Tempering, such as by solution heat treatment, then quenches, then natural aging, later artificial ageing.Suitably being tempered state includes
T4, T5, T6 and T7 are tempered state, such as defined in ANSI H35.1 (2009).In one embodiment, according to gathering around jointly
By U.S. Patent Application Publication 2006/0000094 described in method new alloy as described herein formed be processed into forging
Wheel product, which, which is incorporated by reference, is incorporated herein.It in one embodiment, will be as described herein new
Forging 7xxx aluminium alloys are processed into T5 tempering state (for example, T53 is tempered state), may include after solution heat treatment to new forging
7xxx aluminium alloys (for example, form of forging wheel) carry out pressure quench.
As described above, new forging 7xxx aluminium alloys can realize improved quenching insensitivity.Quenching insensitivity is related to aluminium
Sensibility of the alloy to the quenching condition used after solution heat treatment.One index of quenching sensitive is and high quenching rate phase
Intensity is remarkably decreased when than low quenching rate.As illustrated in the examples below, new forging 7xxx aluminium alloys as described herein can be phase
It is insensitive to quenching.For the purpose of the application, quenching insensitivity is measured in the following manner：According to routine by new forging
7xxx aluminium alloys be produced as final specification be 1.0 inches (2.54mm) milled sheet, later to two identical workpiece of the plate into
One workpiece is then placed in 77 ℉ (25 DEG C) water and carries out cold water quenching and boil another workpiece by row solution heat treatment
Water quenching, continues 10 minutes periods, then air-dries these workpiece.Then 24 hours natures are carried out to the two workpiece
Aging, carries out two step artificial ageings later, and the first step is that aging (wherein has add from environment temperature within 2 hours in 3 hours at 250 ℉
Heat is to 250 ℉) and second step be aging 8 hours at 340 ℉.Using at least duplicate samples, existed according to ASTM B557 and E8
Longitudinal direction (L) tensile yield strength that the two workpiece are measured at T/2, is later averaged the surveyed intensity of each workpiece.Then
The average TYS (L) and the average TYS (L) of boiling water quenching (BWQ ") TYS that cold water is quenched to (" CWQ ") workpiece are compared.Two
Difference (that is, CWQ (TYS)-BWQ (TYS)) between average TYS values is the quenching insensitivity of alloy.
In one embodiment, new forging 7xxx aluminium alloys are realized no more than 7ksi (that is, CWQ (TYS)-BWQ (TYS)
≤ 7ksi) quenching insensitivity (as defined above).In another embodiment, new forging 7xxx aluminium alloys are realized little
In the quenching insensitivity of 6ksi.In yet another embodiment, new forging 7xxx aluminium alloys realize the quenching no more than 5ksi
Insensitivity.In another embodiment, new forging 7xxx aluminium alloys realize the quenching insensitivity no more than 4ksi.Again
In one embodiment, new forging 7xxx aluminium alloys realize the quenching insensitivity no more than 3ksi.In another embodiment
In, new forging 7xxx aluminium alloys realize the quenching insensitivity no more than 2ksi.In yet another embodiment, new forging 7xxx
Aluminium alloy realizes the quenching insensitivity no more than 1ksi.In another embodiment, new forging 7xxx aluminium alloys are realized not
Quenching insensitivity more than 0ksi, it means that boiling water quenching alloy realizes the intensity at least equivalent with cold water quenching alloy.
In yet another embodiment, new forging 7xxx aluminium alloys realize the quenching insensitivity no more than -1ksi, it means that boiling water
It quenches alloy and realizes intensity more higher than cold water quenching alloy.In another embodiment, new forging 7xxx aluminium alloys are realized
Quenching insensitivity no more than -2ksi.In another embodiment, new forging 7xxx aluminium alloys, which are realized, is not more than -3ksi
Quenching insensitivity.In another embodiment, new forging 7xxx aluminium alloys are realized insensitive no more than the quenching of -4ksi
Property.In another embodiment, new forging 7xxx aluminium alloys realize the quenching insensitivity no more than -5ksi.At another
In embodiment, new forging 7xxx aluminium alloys realize the quenching insensitivity no more than -6ksi.In another embodiment,
New forging 7xxx aluminium alloys realize the quenching insensitivity no more than -7ksi.In another embodiment, new forging 7xxx aluminium
Alloy realizes the quenching insensitivity no more than -8ksi.In another embodiment, new forging 7xxx aluminium alloys are realized little
In the quenching insensitivity of -9ksi or more.
The quenching insensitivity of new forging 7xxx aluminium alloys can promote improved intensity.Equally, when use thermal quenching medium
When, new forging 7xxx aluminium alloys can realize less deformation.
It is quenched after any applicable fluid or medium can be used to carry out solution heat treatment to new forging 7xxx aluminium alloys.One
In a embodiment, water quenching (cold water quenching, hot water quenching or boiling water quenching) is carried out to new forging 7xxx aluminium alloys.At one
In embodiment, hot water quenching or boiling water quenching are carried out to new forging 7xxx aluminium alloys.Hot water quenching is to use to have 150 ℉ extremely
The water of the temperature of boiling (being at standard temperature and pressure 212 ℉) is quenched.Boiling water quenching uses boiling water.Boiling water quenching is
Hot water quenches one kind in classification.As shown in following data, the use of hot water quenching (including boiling water quenching) can promote improvement
SCC resistances.In another embodiment, air hardening is carried out (for example, quenching via forced air to new forging 7xxx aluminium alloys
Fire).In yet another embodiment, pressure quench is carried out to new forging 7xxx aluminium alloys.In one embodiment, quenching step
It is rapid generate quenching most start 60 seconds during the average cooling rate of 1 ℉ per second to 25 ℉ that measures.In another embodiment party
In case, quenching Step generate quenching most start 60 seconds during the average cooling rate per second for being not more than 22.5 ℉ that measures.
In yet another embodiment, quenching Step generate quenching most start 60 seconds during measure per second be not more than the flat of 20 ℉
Equal cooling rate.In another embodiment, quenching Step generate quenching most start 60 seconds during measure it is per second not
Average cooling rate more than 17.5 ℉.In yet another embodiment, quenching Step is generated most starts 60 second phase in quenching
Between the average cooling rate per second for being not more than 15 ℉ that measures.In another embodiment, quenching Step is generated in quenching
Most start the average cooling rate per second for being not more than 12.5 ℉ measured during 60 seconds.In yet another embodiment, quenching step
It is rapid generate quenching most start 60 seconds during the average cooling rate per second for being not more than 10 ℉ that measures.In another embodiment party
In case, quenching Step generate quenching most start 60 seconds during the average cooling rate per second for being not more than 9.0 ℉ that measures.
In another embodiment, quenching Step generate quenching most start 60 seconds during measure per second be not more than the flat of 8.0 ℉
Equal cooling rate.In another embodiment, quenching Step generate quenching most start 60 seconds during measure it is per second not
Average cooling rate more than 7.0 ℉.In yet another embodiment, quenching Step generate quenching most start 60 seconds during
The average cooling rate per second for being not more than 6.0 ℉ measured.
Description of the drawings
Fig. 1 is the table for the various embodiments for showing new 7xxx forgings aluminium alloy composition.
Specific implementation mode
Embodiment 1
It will be cast into 2.5 inches of laboratory scale with several 7xxx aluminium alloys formed shown in the following table 1
(6.35cm) thickness ingot casting (nominal).Then by ingot casting peeling, homogenize and be rolled into the final rule of 1.25 inches (3.175cm)
Lattice.After hot rolling, metallography inspection is carried out to these plates.The inspection shows plate 2,14,15,17 and 18 containing high-volume fractional
Constituent particle, this is because the V+Zr+Ti contents of these alloys are excessive relative to Zn+Mg+Cu contents.
Then solution heat treatment is carried out to hot rolled plate, cold water quenching is then allowed to carry out natural aging in about 24 hours.From
After right aging, two step artificial ageings then are carried out to plate, first aging 3 hours at 250 ℉, then aging 8 hours at 340 ℉.
Artificial ageing also is carried out to several alloy samples in natural aging condition, first aging 3 hours at 250 ℉, then at 340 ℉
Aging 16 hours.Then longitudinal direction (L) mechanical property of the plate of artificial ageing is measured at T/2 according to ASTM B557 and E8, is tied
Fruit is shown in the following table 2 (average values of duplicate samples).
Composition (all values are by weight percentage) * of 1 alloy of table 1- embodiments
| Alloy is numbered | Si | Fe | Zn | Mg | Cu | V | Zr | V+Zr |
| 1** | 0.056 | 0.087 | 4.25 | 1.59 | 0.57 | 0.079 | 0.10 | 0.179 |
| 2 | 0.059 | 0.094 | 4.83 | 1.67 | 0.65 | 0.120 | 0.19 | 0.310 |
| 3** | 0.057 | 0.095 | 5.20 | 1.60 | 0.64 | 0.082 | 0.10 | 0.182 |
| 4** | 0.056 | 0.094 | 6.02 | 1.57 | 0.64 | 0.086 | 0.10 | 0.186 |
| 5 | 0.057 | 0.085 | 3.65 | 1.66 | 0.62 | 0.080 | 0.11 | 0.190 |
| 6 | 0.059 | 0.092 | 2.83 | 1.61 | 0.60 | 0.080 | 0.10 | 0.180 |
| 7** | 0.064 | 0.093 | 4.39 | 1.99 | 0.62 | 0.088 | 0.10 | 0.188 |
| 8** | 0.057 | 0.092 | 4.38 | 2.37 | 0.61 | 0.089 | 0.10 | 0.189 |
| 9 | 0.052 | 0.072 | 4.53 | 1.20 | 0.55 | 0.083 | 0.10 | 0.183 |
| 10 | 0.050 | 0.080 | 4.40 | 0.85 | 0.60 | 0.080 | 0.10 | 0.180 |
| 11** | 0.058 | 0.084 | 4.41 | 1.63 | 0.88 | 0.084 | 0.10 | 0.184 |
| 12** | 0.054 | 0.088 | 4.38 | 1.64 | 1.26 | 0.083 | 0.10 | 0.183 |
| 13** | 0.055 | 0.088 | 4.35 | 1.63 | 0.42 | 0.082 | 0.12 | 0.202 |
| 14 | 0.059 | 0.092 | 4.44 | 1.67 | 0.61 | 0.200 | 0.10 | 0.300 |
| 15 | 0.059 | 0.086 | 4.46 | 1.62 | 0.61 | 0.160 | 0.11 | 0.270 |
| 16** | 0.058 | 0.100 | 4.41 | 1.55 | 0.64 | 0.056 | 0.10 | 0.156 |
| 17 | 0.057 | 0.089 | 4.39 | 1.65 | 0.61 | 0.088 | 0.15 | 0.238 |
| 18 | 0.059 | 0.092 | 4.44 | 1.61 | 0.62 | 0.086 | 0.19 | 0.276 |
| 19** | 0.054 | 0.084 | 4.36 | 1.62 | 0.59 | 0.086 | 0.06 | 0.146 |
| 20 | 0.056 | 0.088 | 4.31 | 1.6 | 0.61 | 0.078 | 0 | 0.078 |
* the surplus of=alloy is Ti, Al and impurity；In addition to alloy 2 is containing 0.055 weight %Ti, all alloys all contain
There is 0.02 weight %-0.03 weight %Ti；All alloys contain any type impurity of≤0.03 weight %, and all impurity
Total amount≤0.10 weight %；In this embodiment, impurity includes Mn and Cr.
*=alloy of the present invention
The measurement mechanical property of 1 alloy of table 2- embodiments
It is as shown in the table, and the alloy 5-6 and 9-10 with low zinc (alloy 5-6) or low magnesium (9-10), can not with low-intensity
Realize at least tensile yield strength of 320MPa (TYS) and at least 12% extensibility.
The rotation beam type fatigue test according to ISO 1143 also is executed to alloy sheets 1,13,16 and 20, the results are shown under
In table 3.The stress level of the experiment is that 15ksi, wherein R=-1 and RPM are 10,000.Each alloy uses three samples, and
And measure the fatigue period number of each sample.Experiment expires to be recycled for 10,000,000.
The measurement fatigue life of table 3- alloys 1,13,16 and 20
It is as shown in the table, and the alloy 20 without zirconium realizes the worse fatigue properties for alloy 1,13 and 16.
Embodiment 2
It will be cast into commercial scale billet with the three kinds of 7xxx aluminium alloys formed shown in the following table 4.Using these billets,
3 " the samples of " × 7.75 " × 7.75 are obtained by machining from D/2.Then these samples are rolled into about 1.0 inches (2.54cm)
Final specification.Then to hot rolled plate carry out solution heat treatment, then carry out cold water (CW) or boiling water (BW) quenching, be then allowed into
Row natural aging in about 24 hours.Cold water quenching means use environment temperature water.Boiling water quenching means to use boiling water.Natural aging
Afterwards, two step artificial ageings then are carried out to these plates, the first step be at 250 ℉ aging 3 hours (wherein have 2 hours from environment
Temperature is heated to 250 ℉) and second step be aging 8 hours at 340 ℉.Then it is surveyed at T/2 according to ASTM B557 and E8
Longitudinal direction (L) mechanical property of these plates is measured, the results are shown in (average values of duplicate samples) in the following table 5.Also according to ASTM
G103-97(2011)“Standard Practice for Evaluating Stress-Corrosion Cracking
Resistance of Low Copper 7XXX Series Al-Zn-Mg-Cu Alloys in Boiling 6%Sodium
Chloride Solution " are (for assessing low copper 7XXX series A l-Zn-Mg-Cu alloys in 6% sodium chloride solution of boiling
Stress corrosion cracking resistance standard practices) under 25ksi and 35ksi stress levels measure SCC as a result, the results are shown under
In table 6.
Composition (all values are by weight percentage) * of 2 alloy of table 4- embodiments
| Alloy is numbered | Si | Fe | Zn | Mg | Cu | V | Zr |
| A | 0.062 | 0.065 | 4.38 | 1.54 | 0.63 | 0.06 | 0.08 |
| B | 0.078 | 0.061 | 4.60 | 1.72 | 0.61 | 0.01 | 0.11 |
| C | 0.060 | 0.068 | 4.43 | 1.71 | 0.89 | 0.01 | 0.10 |
* the surplus of=alloy is Ti, Al and impurity；All alloys contain 0.02 weight %-0.03 weight %Ti；All conjunctions
Gold contains any type impurity of≤0.03 weight %, the weight % of the and total amount of all impurity≤0.10；In this embodiment,
Impurity includes Mn and Cr.
The measurement mechanical property of 2 alloy of table 5- embodiments
The SCC characteristics of 2 alloy of table 6- embodiments
OK7=has passed through complete 7 days SCC experiments
7.0=failed at the 7th day
It is as shown in the table, and alloy A realizes intensity, the excellent combination of extensibility and SCC resistance traits.It is as shown in the table, alloy A
Generally it is that quenching is insensitive, the tensile yield strength of high about 8ksi is realized in boiling water quenching.
Although the various embodiments of the disclosure have already been described in detail, it is apparent that those skilled in the art is it is conceivable that right
The modification and adjustment of these embodiments.It is to be expressly understood, however, that these modifications and adjustment are in the essence of the disclosure and model
In enclosing.
Claims (4)
1. a kind of forging 7xxx aluminium alloys, by following material composition：
(a) 3.75 weight % to 8.0 weight %Zn；
(b) 1.25 weight % to 3.0 weight %Mg；
(c) 0.35 weight % to 1.35 weight %Cu；
(d) 0.04 weight % to 0.20 weight %V；
(e) 0.06 weight % to 0.20 weight %Zr；
The weight of wherein V+Zr≤0.23 %；
(f) 0.01 weight % to 0.25 weight %Ti；
(g) at most 0.50 weight %Mn；
(h) at most 0.40 weight %Cr；
(i) at most 0.35 weight %Fe；And
(j) at most 0.25 weight %Si；
(k) surplus is aluminium and impurity, wherein the forging 7xxx aluminium alloys include respectively to be not more than any the one of 0.10 weight %
Kind impurity, and the wherein described forging 7xxx aluminium alloys include the impurity that total amount is not more than 0.35 weight %.
2. forging 7xxx aluminium alloys according to claim 1, wherein the forging 7xxx aluminium alloys are forging wheel products.
3. forging 7xxx aluminium alloys according to claim 1, wherein the forging 7xxx aluminium alloys are the forgings of T5 tempering states
Make wheel product.
4. forging 7xxx aluminium alloys according to claim 1, wherein the forging 7xxx aluminium alloys are the forgings of T5 tempering states
Wheel product is made, and the wherein described forging 7xxx aluminium alloys realize the quenching insensitivity no more than 7ksi.
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| US201562248165P | 2015-10-29 | 2015-10-29 | |
| US62/248,165 | 2015-10-29 | ||
| PCT/US2016/059120 WO2017075217A1 (en) | 2015-10-29 | 2016-10-27 | Improved wrought 7xxx aluminum alloys, and methods for making the same |
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| EP (1) | EP3368702B1 (en) |
| CN (1) | CN108291280B (en) |
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| CN107619976B (en) * | 2017-08-09 | 2019-04-16 | 中车青岛四方机车车辆股份有限公司 | A kind of Al-Zn-Mg alloy and preparation method thereof |
| EP3704279A4 (en) | 2017-10-31 | 2021-03-10 | Howmet Aerospace Inc. | Improved aluminum alloys, and methods for producing the same |
| JP2022512876A (en) * | 2018-11-12 | 2022-02-07 | アレリス、ロールド、プロダクツ、ジャーマニー、ゲゼルシャフト、ミット、ベシュレンクテル、ハフツング | 7XXX series aluminum alloy products |
| EP3927860A4 (en) * | 2019-02-20 | 2022-11-23 | Howmet Aerospace Inc. | Improved aluminum-magnesium-zinc aluminum alloys |
| US20210172044A1 (en) * | 2019-12-05 | 2021-06-10 | Kaiser Aluminum Fabricated Products, Llc | High Strength Press Quenchable 7xxx alloy |
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| JPS5928555A (en) * | 1982-08-06 | 1984-02-15 | Sumitomo Light Metal Ind Ltd | High tensile aluminum alloy good in extrudability and excellent in strength and toughness |
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| JP2010221256A (en) * | 2009-03-24 | 2010-10-07 | Furukawa-Sky Aluminum Corp | Tube joining method |
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| US5135713A (en) * | 1984-03-29 | 1992-08-04 | Aluminum Company Of America | Aluminum-lithium alloys having high zinc |
| US4867805A (en) * | 1988-02-03 | 1989-09-19 | Agrawal Suphal P | Superplastic aluminum alloys, alloy processes and component part formations thereof |
| JPH03122245A (en) * | 1989-10-06 | 1991-05-24 | Furukawa Alum Co Ltd | High strength aluminum alloy for welding excellent in stress corrosion cracking resistance |
| US20060000094A1 (en) | 2004-07-01 | 2006-01-05 | Garesche Carl E | Forged aluminum vehicle wheel and associated method of manufacture and alloy |
| CA2572340A1 (en) * | 2004-07-01 | 2006-01-19 | Michael P. Fleming | Protective helmet for children in automobiles |
| ES2373054T5 (en) * | 2005-08-16 | 2018-12-05 | Aleris Aluminum Koblenz Gmbh | High strength weldable Al-Mg alloy |
| US7914646B2 (en) * | 2006-07-21 | 2011-03-29 | Nalco Company | Compositions and processes for paper production |
| US8088234B2 (en) * | 2006-07-07 | 2012-01-03 | Aleris Aluminum Koblenz Gmbh | AA2000-series aluminum alloy products and a method of manufacturing thereof |
| US20110111081A1 (en) * | 2008-06-24 | 2011-05-12 | Aleris Aluminum Koblenz Gmbh | Al-zn-mg alloy product with reduced quench sensitivity |
| US9347558B2 (en) * | 2010-08-25 | 2016-05-24 | Spirit Aerosystems, Inc. | Wrought and cast aluminum alloy with improved resistance to mechanical property degradation |
| CN103168110A (en) * | 2010-09-08 | 2013-06-19 | 美铝公司 | Improved aluminum-lithium alloys, and methods for producing the same |
| EP3483292A1 (en) * | 2014-04-30 | 2019-05-15 | Alcoa USA Corp. | Improved 7xx aluminum casting alloys |
| JP5928555B2 (en) * | 2014-10-30 | 2016-06-01 | キヤノンマーケティングジャパン株式会社 | Information processing system, information processing method, and computer program |
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- 2016-10-27 US US15/336,443 patent/US20170121795A1/en not_active Abandoned
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS5928555A (en) * | 1982-08-06 | 1984-02-15 | Sumitomo Light Metal Ind Ltd | High tensile aluminum alloy good in extrudability and excellent in strength and toughness |
| CN1780925A (en) * | 2003-04-10 | 2006-05-31 | 克里斯铝轧制品有限公司 | High strength al-zn alloy and method for producing such an alloy product |
| JP2010221256A (en) * | 2009-03-24 | 2010-10-07 | Furukawa-Sky Aluminum Corp | Tube joining method |
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| CA3003158A1 (en) | 2017-05-04 |
| EP3368702A4 (en) | 2019-07-17 |
| EP3368702A1 (en) | 2018-09-05 |
| WO2017075217A1 (en) | 2017-05-04 |
| CA3003158C (en) | 2020-07-07 |
| CN108291280B (en) | 2021-05-11 |
| EP3368702B1 (en) | 2023-08-16 |
| HUE063975T2 (en) | 2024-02-28 |
| US20170121795A1 (en) | 2017-05-04 |
| EP3368702C0 (en) | 2023-08-16 |
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