CA2564078A1 - Heat treatable al-zn-mg alloy for aerospace and automotive castings - Google Patents
Heat treatable al-zn-mg alloy for aerospace and automotive castings Download PDFInfo
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- CA2564078A1 CA2564078A1 CA002564078A CA2564078A CA2564078A1 CA 2564078 A1 CA2564078 A1 CA 2564078A1 CA 002564078 A CA002564078 A CA 002564078A CA 2564078 A CA2564078 A CA 2564078A CA 2564078 A1 CA2564078 A1 CA 2564078A1
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- 238000005266 casting Methods 0.000 title claims abstract description 31
- 229910000861 Mg alloy Inorganic materials 0.000 title description 3
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 23
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 15
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 12
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 12
- 239000012535 impurity Substances 0.000 claims abstract description 8
- 229910045601 alloy Inorganic materials 0.000 claims description 38
- 239000000956 alloy Substances 0.000 claims description 38
- 239000011777 magnesium Substances 0.000 claims description 20
- 239000011701 zinc Substances 0.000 claims description 15
- 239000011572 manganese Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 10
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 9
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 7
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 7
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 5
- 229910052726 zirconium Inorganic materials 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 238000001953 recrystallisation Methods 0.000 claims description 4
- 229910052706 scandium Inorganic materials 0.000 claims description 4
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 claims description 4
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052796 boron Inorganic materials 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 239000004615 ingredient Substances 0.000 claims 3
- 238000005275 alloying Methods 0.000 claims 2
- 229910052782 aluminium Inorganic materials 0.000 claims 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 229910052710 silicon Inorganic materials 0.000 abstract description 7
- 229910052742 iron Inorganic materials 0.000 abstract description 5
- 239000000463 material Substances 0.000 description 7
- 230000007797 corrosion Effects 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- QYEXBYZXHDUPRC-UHFFFAOYSA-N B#[Ti]#B Chemical compound B#[Ti]#B QYEXBYZXHDUPRC-UHFFFAOYSA-N 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 229910033181 TiB2 Inorganic materials 0.000 description 4
- 229910009369 Zn Mg Inorganic materials 0.000 description 4
- 229910007573 Zn-Mg Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 230000035882 stress Effects 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 description 2
- 229910018569 Al—Zn—Mg—Cu Inorganic materials 0.000 description 1
- 239000008186 active pharmaceutical agent Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000005495 investment casting Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/10—Alloys based on aluminium with zinc as the next major constituent
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Continuous Casting (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Body Structure For Vehicles (AREA)
Abstract
A heat treatable aluminum alloy for shaped castings includes from about 3.5-5.5 % Zn, from about 1-1.5 % Mg, less than about 1 % Si, less than about 0.30 % Mn, and less than about 0.3 % Fe and other incidental impurities.
Description
Heat Treatable AI-Zn-Mg Alloy for Aerospace and Automotive Castings Cross Reference to Related Applications [0001] This application claims the benefit of U.S. Provisional Application Serial No.
60/564,813 filed on April 22, 2004, which is fully incorporated herein by reference thereto. It is also closely related to the patent application "Heat Treatable Al-Zn-Mg-Cu Alloy for Aerospace and Automotive Castings" filed concurrently with this application, and which is also incorporated herein by reference thereto.
Field of the Invention [0002] This invention is an aluminum alloy for aerospace and automotive shaped castings, castings comprised of the alloy, and methods of making cast components of the alloy.
Background of the Invention [0003] Cast aluminum parts are used in structural applications in automobile suspensions to reduce weight. The most commonly used group of alloys, Al-Si7-Mg, has well established strength limits. In order to obtain lighter weight parts, higher strength material is needed with established material properties for design. At present, cast materials made of A356.0, the most commonly used Al-Si7-Mg alloy, can reliably guarantee ultimate tensile strength of 290 MPa (42,060 psi), and tensile yield strength of 220 MPa (31,908 psi) with elongations of 8% or greater.
60/564,813 filed on April 22, 2004, which is fully incorporated herein by reference thereto. It is also closely related to the patent application "Heat Treatable Al-Zn-Mg-Cu Alloy for Aerospace and Automotive Castings" filed concurrently with this application, and which is also incorporated herein by reference thereto.
Field of the Invention [0002] This invention is an aluminum alloy for aerospace and automotive shaped castings, castings comprised of the alloy, and methods of making cast components of the alloy.
Background of the Invention [0003] Cast aluminum parts are used in structural applications in automobile suspensions to reduce weight. The most commonly used group of alloys, Al-Si7-Mg, has well established strength limits. In order to obtain lighter weight parts, higher strength material is needed with established material properties for design. At present, cast materials made of A356.0, the most commonly used Al-Si7-Mg alloy, can reliably guarantee ultimate tensile strength of 290 MPa (42,060 psi), and tensile yield strength of 220 MPa (31,908 psi) with elongations of 8% or greater.
[0004] A variety of alternate alloys exist and are registered that exhibit higher strength than the Al-Si7-Mg alloys. However, these exhibit problems in castability, corrosion potential or fluidity that are not readily overcome. The alternate alloys are therefore less suitable for use.
[0005] Where high strength is required, forged products are often used. These are usually more expensive than cast products. There exists the potential for considerable cost savings if cast products can be used to replace forged products with no loss of strength, elongation, corrosion resistance, fatigue strength, etc. This is true in both automotive and aerospace applications.
[0006] Casting alloys exhibiting higher tensile strength and fatigue resistance than the Al-Si7-Mg material are desirable. Such improvements could be used to reduce weight in new parts or in existing parts which can be redesigned to use the improved material properties to great advantage.
Introduction to the Invention [0007] The alloy of the present invention is an AI-Zn-Mg base alloy for low pressure permanent or semi-permanent mold, squeeze, high pressure die, pressure or gravity casting, lost foam, investment casting, V-mold, or sand mold casting with the following composition ranges (all in weight percent):
Zn: about 3.5-5.5%, Mg: about 0.8-1.5%, Si: less than about 1.0%, Mn: less than about 0.30%, Fe and other incidental impurities: less than about 0.30%.
Zn: about 3.5-5.5%, Mg: about 0.8-1.5%, Si: less than about 1.0%, Mn: less than about 0.30%, Fe and other incidental impurities: less than about 0.30%.
[0008] Silicon up to about 1.0% may be einployed to improve castability. Lower levels of silicon may be employed to increase strength. For some applications, manganese up to about 0.3% may be employed to improve castability. In other applications, manganese is to be avoided.
[0009] The alloy may also contain grain refiners such as titanium diboride, TiB2 or titanium carbide, TiC and/or anti-recrystallization agents such as zirconium or scandium. If titanium diboride is employed as a grain refiner, the concentration of boron in the alloy may be in a range from 0.0025% to 0.05%. Likewise, if titanium carbide is employed as a grain refiner, the concentration of carbon in the alloy may be in the range from 0.0025% to 0.05%.
Typical grain refiners are aluminum alloys containing TiC or TiB2.
Typical grain refiners are aluminum alloys containing TiC or TiB2.
[0010] Zirconium, if used to prevent grain growtli during solution heat treatment, is generally employed in a range below 0.2%. Scandium may also be used in a range below 0.3%.
[0011] The purpose of the present invention is to provide a range of aluminum alloys having good strength, good castability for forming shaped castings, good corrosion resistance and good thermal shock resistance. A fine grain size is often desirable for strength and for appearance, particularly for components which are anodized and then coated with a clear finish layer.
Summary of the Invention [0012] In one aspect, the present invention is an aluminum alloy including from about 3.5-5.5% Zn, from about 0.8-1.5%Mg. It contains less than about 1% Si, less than about 0.30% Mn; and less than 0.30% Fe and other incidental impurities.
Summary of the Invention [0012] In one aspect, the present invention is an aluminum alloy including from about 3.5-5.5% Zn, from about 0.8-1.5%Mg. It contains less than about 1% Si, less than about 0.30% Mn; and less than 0.30% Fe and other incidental impurities.
[0013] In another aspect, the present invention is a heat treatable shaped casting of an aluminum alloy including from about 3.5-5.5% Zn, from about 0.8-1.5% Mg, and less than about 1% Si, less than about 0.30% Mn, and less than 0.30% Fe and other incidental impurities.
[0014] In another aspect, the present invention is a method of preparing a heat treatable aluminum alloy shaped casting. The inethod includes preparing a molten mass of an aluminum alloy including from about 3.5-5.5% Zn, from about 0.8-1.5% Mg, and less than about 1% Si, less than about 0.30% Mn, and less than 0.30% Fe and other incidental impurities. The method further includes casting at least a portion of the molten mass in a mold configured to produce the shaped casting, permitting the molten mass to solidify, and removing the shaped casting from the mold.
Brief Description of the Drawinp-[0015] The figure presents the results of ASTM G44 stress corrosion test on AI-Zn-Mg alloys with and without copper.
Detailed Description of Preferred Embodiments and Comparison with Prior Art Alloys [0016] When referring to any numerical range of values herein, such ranges are understood to include each and every number and/or fraction between the stated range minimum and maximum. A range of about 3.5 to 5.5 wt% zinc, for example, would expressly include all intermediate values of about 3.6, 3.7, 3.8 and 3.9%, all the way up to and including 5.3, 5.35, 5.4, 5.475 and 5.499% Zn. The same applies to each other numerical property and/or elemental range set forth herein.
Brief Description of the Drawinp-[0015] The figure presents the results of ASTM G44 stress corrosion test on AI-Zn-Mg alloys with and without copper.
Detailed Description of Preferred Embodiments and Comparison with Prior Art Alloys [0016] When referring to any numerical range of values herein, such ranges are understood to include each and every number and/or fraction between the stated range minimum and maximum. A range of about 3.5 to 5.5 wt% zinc, for example, would expressly include all intermediate values of about 3.6, 3.7, 3.8 and 3.9%, all the way up to and including 5.3, 5.35, 5.4, 5.475 and 5.499% Zn. The same applies to each other numerical property and/or elemental range set forth herein.
[0017] Alloys according to the present invention were tested in comparison with similar AI-Zn-Mg alloys containing copper. The samples were directionally solidified at a cooling rate of 0.1 C/sec. The results are presented in Table 1.
Table 1 DS Casting T5 and T6 Properties Alloy Tensile Yield E % Tensile Yield E%
Al-4.5Zn-1.2Mg 266 192 10 275 223.5 10 265.5 198 8 268 222.5 10 A1-4.5Zn-1.2Mg-0.4Si 238 174.5 10 309 230.5 16 238.5 173.5 10 312.5 233 16 A1-4.5Zn-1.2Mg-0.25Cu 285.5 207 10 269.5 210.5 10 287 205 12 276 210.5 14 A1-4.5Zn-1.2Mg-0.25Cu- 295 229 4 338.5 278.5 12 0.12Zr 298.5 227.5 4 329.5 266 10 [0018] The first alloy shown in Table 1 was A1-4.5Zn-1.2Mg. Two samples were tested, each in T5 and T6 tempers. The tensile strength and yield strength are presented in megapascals, and the elongation in percent is presented, for two samples of the alloy, in both T5 and T6 tempers. This alloy is an example of the present invention.
Table 1 DS Casting T5 and T6 Properties Alloy Tensile Yield E % Tensile Yield E%
Al-4.5Zn-1.2Mg 266 192 10 275 223.5 10 265.5 198 8 268 222.5 10 A1-4.5Zn-1.2Mg-0.4Si 238 174.5 10 309 230.5 16 238.5 173.5 10 312.5 233 16 A1-4.5Zn-1.2Mg-0.25Cu 285.5 207 10 269.5 210.5 10 287 205 12 276 210.5 14 A1-4.5Zn-1.2Mg-0.25Cu- 295 229 4 338.5 278.5 12 0.12Zr 298.5 227.5 4 329.5 266 10 [0018] The first alloy shown in Table 1 was A1-4.5Zn-1.2Mg. Two samples were tested, each in T5 and T6 tempers. The tensile strength and yield strength are presented in megapascals, and the elongation in percent is presented, for two samples of the alloy, in both T5 and T6 tempers. This alloy is an example of the present invention.
[0019] The second alloy shown in Table 1 also has a composition in the range of the present invention. It contains AI-4.5Zn-1.2Mg-0.4Si. This shows lower values for tensile and yield strength than the previous alloy in T5 temper. However, it has significantly higher values for tensile strength, yield strength and elongation in T6 temper than did the previous alloy.
[0020] The third alloy shown in Table 1 is not within the composition range of the present invention. It is presented for comparison. The third alloy has higher values for tensile and yield strength and higher elongation values in T5 temper than the second alloy in T5 temper, but lower values for tensile and yield strength and lower value for elongation than the second alloy in T6 temper.
[0021] The fourth alloy shown in Table 1 is also not within the composition range of the present invention. It, also, is presented for comparison. The data presented illustrate the effect of zirconium, probably for preventing grain growth. The results for the T6 temper show very high values for tensile strength, yield strength and elongation.
[0022] Mechanical properties of shaped castings of an alloy according to the present invention were tested in a first plant trial, and the results are presented in Table 2.
Table 2 First Plant Trial Al-3.5Zn-0.97M
Tem er Sample # Tensile Yield E %
T5 1 219 175 14.6 2 211 169 8.6 As-cast 3 185 147 15.03 4 189 152 15.95 [0023] The composition for the first plant trial was A1-3.5Zn-0.97Mg. The table presents tensile strength and yield strength in megapascals, as well as elongation in percent.
Two samples were tested in T5 temper, and two samples of the as-cast material were tested.
It is noted that the elongation for the as-cast material had the extraordinary values of 15.03 and 15.95%.
Table 2 First Plant Trial Al-3.5Zn-0.97M
Tem er Sample # Tensile Yield E %
T5 1 219 175 14.6 2 211 169 8.6 As-cast 3 185 147 15.03 4 189 152 15.95 [0023] The composition for the first plant trial was A1-3.5Zn-0.97Mg. The table presents tensile strength and yield strength in megapascals, as well as elongation in percent.
Two samples were tested in T5 temper, and two samples of the as-cast material were tested.
It is noted that the elongation for the as-cast material had the extraordinary values of 15.03 and 15.95%.
[0024] Tests were also made in a second plant trial on an alloy containing slightly more magnesium than the alloy of Table 1. Data for the second plant trial are presented in Table 3.
Table 3 Second Plant Trial Al-3.5 Zn-1.1Mg Tensile Yield E% Temper 210 161 16.7 160 C/1 hr 215 145 6.5 160 C/6 hrs 246 175 10.5 143 C/32 hrs [0025] The data in Table 3 are for an alloy containing Al-3.5 Zn-1.1 Mg. This is an alloy according to the present invention. Data are presented for three different heat treatments. The first was 160 C for 1 hour, the second was 160 C for six hours and the third was 143 C for 32 hours. The tensile strength and yield strength values in this table are expressed in megapascals, and the elongation is expressed in percent.
Table 3 Second Plant Trial Al-3.5 Zn-1.1Mg Tensile Yield E% Temper 210 161 16.7 160 C/1 hr 215 145 6.5 160 C/6 hrs 246 175 10.5 143 C/32 hrs [0025] The data in Table 3 are for an alloy containing Al-3.5 Zn-1.1 Mg. This is an alloy according to the present invention. Data are presented for three different heat treatments. The first was 160 C for 1 hour, the second was 160 C for six hours and the third was 143 C for 32 hours. The tensile strength and yield strength values in this table are expressed in megapascals, and the elongation is expressed in percent.
[0026] Table 4 presents data for the same alloy as the samples in Table 3. The samples reported in Table 4 were subjected to a T6 heat treatment that consisted of 471 C for 3 hours, and then 527 C for 10 hours followed by cold water quench. The samples were then aged as reported in Table 4, and the stress results in Table 4 were then obtained. The first line in the table is for a sample which was naturally aged only.
Table 4 Al-3.5 Zn-1.1Mg after T6 Heat Treatment Ageing temp/time Tensile Yield E%
Natural age only 274 MPa 138 MPa 24.5 160 C / 6 hours 272 MPa 177 MPa 16.5 160 C /12 hours 287 MPa 201 MPa 16.0 160 C/18hours 309MPa 230MPa 15.0 143 C / 12 hours 270 MPa 175 MPa 17.5 143 C/32hours 288MPa 197MPa 15.5 143 C / 64 hours 311 MPa 239 MPa 11.5 [0027] Corrosion tests were also performed employing the ASTM G44 test which is the "Standard Practice for Exposure of Metals and Alloys by Alternate Immersion in Neutral 3.5% Sodium Chloride Solution". In this test, stressed specimens are subjected to a 1-hour cycle which includes immersion in 3.5% NaCI solution for 10 minutes and then in lab air for 50 minutes. The samples were stressed at 75% of their yield strength, and the test was run for 180 days.
Table 4 Al-3.5 Zn-1.1Mg after T6 Heat Treatment Ageing temp/time Tensile Yield E%
Natural age only 274 MPa 138 MPa 24.5 160 C / 6 hours 272 MPa 177 MPa 16.5 160 C /12 hours 287 MPa 201 MPa 16.0 160 C/18hours 309MPa 230MPa 15.0 143 C / 12 hours 270 MPa 175 MPa 17.5 143 C/32hours 288MPa 197MPa 15.5 143 C / 64 hours 311 MPa 239 MPa 11.5 [0027] Corrosion tests were also performed employing the ASTM G44 test which is the "Standard Practice for Exposure of Metals and Alloys by Alternate Immersion in Neutral 3.5% Sodium Chloride Solution". In this test, stressed specimens are subjected to a 1-hour cycle which includes immersion in 3.5% NaCI solution for 10 minutes and then in lab air for 50 minutes. The samples were stressed at 75% of their yield strength, and the test was run for 180 days.
[0028] The figure shows the results of this test. It is seen that at high magnesium levels, copper is needed to prevent stress corrosion cracking. However, for the low magnesium levels of the present invention (about 1.2% Mg), copper is not required.
[0029] Presently preferred embodiments of the present invention having been presented above, it is to be understood that the invention may be otherwise embodied within the scope of the appended claims.
Claims (26)
1. A heat treatable aluminum alloy for shaped castings, said aluminum alloy comprising, in weight percent:
Zn: about 3,5-5,5%;
Mg: about 0.8-1.5%;
Si: less than about 1%;
Mn: no more than about 0.04%; and Fe and other incidental impurities: less than about 0.30%,
Zn: about 3,5-5,5%;
Mg: about 0.8-1.5%;
Si: less than about 1%;
Mn: no more than about 0.04%; and Fe and other incidental impurities: less than about 0.30%,
2. An aluminum alloy according to claim 1 further comprising at least one grain refiner selected from the group consisting of boron, carbon and combinations thereof.
3. An aluminum alloy according to claim 2, wherein said at least one grain refiner includes boron in a range from about 0.0025 to about 0.05%.
4. An aluminum alloy according to claim 2, wherein said at least one grain refiner includes carbon in a range from about 0.0025 to about 0.05%.
5. An aluminum alloy according to claim 1 further comprising at least one anti-recrystallization agent selected from the group consisting of zirconium, scandium and combinations thereof.
6. An aluminum alloy according to claim 5 wherein said at least one anti-recrystallization agent includes zirconium in a range below 0.2%,
7. An aluminum alloy according to claim 5 wherein said at least one anti-recrystallization agent includes scandium in a range below 0.3%.
8. An aluminum alloy according to claim 1 wherein said zinc is at a concentration of about 4.2 to 4.8%.
9, An aluminum alloy according to claim 1 wherein said zinc is at a concentration of about 4.4 to 4.6%.
10. An aluminum alloy according to claim 1 wherein said magnesium is at a concentration of about 1.0 to 1,4%.
11. An aluminum alloy according to claim 10 wherein said magnesium is at a concentration of about 1.1 to 1.3%.
12. An aluminum alloy according to claim 1 wherein a concentration of manganese in said alloy is less than about 0.01%.
13. A shaped casting of an aluminum, alloy, wherein said alloy comprises:
Zn: about 3.5-5,5%;
Mg: about 0.8-1,5%;
Si: less than, about 1%;
Mn; no more than about 0,04%; and Fe and other incidental impurities: less than about 0,30%.
Zn: about 3.5-5,5%;
Mg: about 0.8-1,5%;
Si: less than, about 1%;
Mn; no more than about 0,04%; and Fe and other incidental impurities: less than about 0,30%.
14. A shaped casting according to claim 13 after T5 heat treatment.
15. A shaped casting according to claim 13 after T6 heat treatment.
16. A shaped casting according to claim 13 wherein said zinc is at a concentration of about 4.2 to 4.8%.
17. A shaped casting according to claim 13 wherein said zinc is at a concentration of about 4.4 to 4.6%.
18, A shaped casting according to claim 13 wherein said magnesium is at a concentration of about 1.0 to 1.4%.
19. A shaped casting according to claim 13 wherein said magnesium is at a concentration of about 1.1 to 1.3%.
20. A method of making an aluminum alloy shaped casting, said method comprising:
preparing a molten mass of an aluminum alloy, said alloy comprising:
Zn: about 3.5-5.5%;
Mg: about 0.8-1.5%;
Si: less than about 1%;
Mn: no more than about 0,40%;
Fe and other incidental impurities: less than about 0.30%;
casting at least a portion of said molten mass in a mold configured to produce said shaped casting;
permitting said molten mass in said mold to solidify; and removing said shaped casting from said mold.
preparing a molten mass of an aluminum alloy, said alloy comprising:
Zn: about 3.5-5.5%;
Mg: about 0.8-1.5%;
Si: less than about 1%;
Mn: no more than about 0,40%;
Fe and other incidental impurities: less than about 0.30%;
casting at least a portion of said molten mass in a mold configured to produce said shaped casting;
permitting said molten mass in said mold to solidify; and removing said shaped casting from said mold.
21. A method according to claim 20 further comprising subjecting said sha.ped casting to a T5 beat treatment.
22. A method according to claim 20 further comprising subjecting said shaped casting to a T6 heat treatment.
23. A method according to claim 20 wherein said zinc is at a concentration of about 4.2 to 4.8%.
24. A method according to claim 20 wherein said zinc is at a concentration of about 4.4-4.6%.
25. A method according to claim 20 wherein said magnesium is at a concentration of about 1.0 to 1.4%.
26. A method according to claim 20 wherein said magnesium is at a concentration of about 1.l to 1.3%.
Original Claims 1, 13, 14 and 21 mention Manganese, but only an upper limit to Manganese is recited in these claims. In the amendment to original Claims 1, 14 and 21, the Manganese is now restricted to less than about 0.04%. A basis for this low amount of Manganese can be found in the specification. Claims 1, 14 and 21 have been further amended to no longer refer to the list of ingredients as "alloying ingredients"
because Manganese is not properly an alloying ingredient, since it is not positively recited as having a minimum value.
The originally-filed Claim 12 has been cancelled because its limitation is implied by Claim 1, from which it depends. The claims were renumbered to accommodate the cancellation of Claim 12.
Original Claims 1, 13, 14 and 21 mention Manganese, but only an upper limit to Manganese is recited in these claims. In the amendment to original Claims 1, 14 and 21, the Manganese is now restricted to less than about 0.04%. A basis for this low amount of Manganese can be found in the specification. Claims 1, 14 and 21 have been further amended to no longer refer to the list of ingredients as "alloying ingredients"
because Manganese is not properly an alloying ingredient, since it is not positively recited as having a minimum value.
The originally-filed Claim 12 has been cancelled because its limitation is implied by Claim 1, from which it depends. The claims were renumbered to accommodate the cancellation of Claim 12.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US56481304P | 2004-04-22 | 2004-04-22 | |
| US60/564,813 | 2004-04-22 | ||
| US11/111,585 US20050238529A1 (en) | 2004-04-22 | 2005-04-21 | Heat treatable Al-Zn-Mg alloy for aerospace and automotive castings |
| US11/111,585 | 2005-04-21 | ||
| PCT/US2005/013766 WO2005106057A2 (en) | 2004-04-22 | 2005-04-22 | Heat treatable al-zn-mg alloy for aerospace and automotive castings |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2564078A1 true CA2564078A1 (en) | 2005-11-10 |
Family
ID=35136636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002564078A Abandoned CA2564078A1 (en) | 2004-04-22 | 2005-04-22 | Heat treatable al-zn-mg alloy for aerospace and automotive castings |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US20050238529A1 (en) |
| EP (1) | EP1759028A4 (en) |
| JP (1) | JP2007534839A (en) |
| KR (1) | KR20070009719A (en) |
| AU (1) | AU2005238478A1 (en) |
| CA (1) | CA2564078A1 (en) |
| MX (1) | MXPA06012242A (en) |
| NO (1) | NO20065386L (en) |
| WO (1) | WO2005106057A2 (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2292075T5 (en) | 2005-01-19 | 2010-12-17 | Otto Fuchs Kg | ALUMINUM ALLOY NOT SENSITIVE TO BRUSH COOLING, AS WELL AS A PROCEDURE FOR MANUFACTURING A SEMI-FINISHED PRODUCT FROM THIS ALLOY. |
| US20060289093A1 (en) * | 2005-05-25 | 2006-12-28 | Howmet Corporation | Al-Zn-Mg-Ag high-strength alloy for aerospace and automotive castings |
| US8083871B2 (en) | 2005-10-28 | 2011-12-27 | Automotive Casting Technology, Inc. | High crashworthiness Al-Si-Mg alloy and methods for producing automotive casting |
| EP1978120B1 (en) * | 2007-03-30 | 2012-06-06 | Technische Universität Clausthal | Aluminium-silicon alloy and method for production of same |
| ES2330713B2 (en) * | 2008-06-11 | 2010-04-19 | Abinash Banerji | ALUMINUM BASED GRAIN TUNER. |
| US8349462B2 (en) | 2009-01-16 | 2013-01-08 | Alcoa Inc. | Aluminum alloys, aluminum alloy products and methods for making the same |
| FR2968675B1 (en) * | 2010-12-14 | 2013-03-29 | Alcan Rhenalu | 7XXX THICK-ALLOY PRODUCTS AND METHOD OF MANUFACTURE |
| CN111020314A (en) * | 2013-09-30 | 2020-04-17 | 苹果公司 | Aluminum alloy with high strength and attractive appearance |
| DE102014224229A1 (en) | 2014-11-27 | 2016-06-02 | Federal-Mogul Nürnberg GmbH | Method for producing an engine component, engine component and use of an aluminum alloy |
| US11345980B2 (en) | 2018-08-09 | 2022-05-31 | Apple Inc. | Recycled aluminum alloys from manufacturing scrap with cosmetic appeal |
| CN114214547B (en) * | 2021-09-30 | 2022-08-23 | 中国航发北京航空材料研究院 | Aluminum-zinc-magnesium-scandium alloy and preparation method thereof |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR917559A (en) * | 1945-11-20 | 1947-01-15 | Aluminum-zinc-magnesium alloys | |
| US3616420A (en) * | 1968-11-25 | 1971-10-26 | British Aluminium Co Ltd | Aluminium base alloys and anodes |
| JPS61186445A (en) * | 1985-02-12 | 1986-08-20 | Riyouka Keikinzoku Kogyo Kk | Metallic mold for molding resin |
| JPS61227143A (en) * | 1985-03-29 | 1986-10-09 | Sumitomo Light Metal Ind Ltd | Aluminum alloy for high pressure casting excelling in strength and suitable for welding structures |
| JPS62250149A (en) * | 1986-04-24 | 1987-10-31 | Kobe Steel Ltd | Aluminum alloy for bicycle |
| US4873054A (en) * | 1986-09-08 | 1989-10-10 | Kb Alloys, Inc. | Third element additions to aluminum-titanium master alloys |
| JP3594272B2 (en) * | 1995-06-14 | 2004-11-24 | 古河スカイ株式会社 | High strength aluminum alloy for welding with excellent stress corrosion cracking resistance |
| JPH10280081A (en) * | 1997-04-08 | 1998-10-20 | Sky Alum Co Ltd | Frame-shaped member with high strength and high precision, made of al-zn-mg alloy, and its production |
| JPH10298692A (en) * | 1997-04-22 | 1998-11-10 | Sky Alum Co Ltd | Frame-shaped member with high strength and high precision, and its production |
| US20010028861A1 (en) * | 1997-12-17 | 2001-10-11 | Que-Tsang Fang | High strength Al-Zn-Mg alloy for making shaped castings including vehicle wheels and structural components |
| JP4818509B2 (en) * | 2000-12-04 | 2011-11-16 | 新日本製鐵株式会社 | Paint bake hardening and press forming aluminum alloy plate and method for producing the same |
| EP1229141A1 (en) * | 2001-02-05 | 2002-08-07 | ALUMINIUM RHEINFELDEN GmbH | Cast aluminium alloy |
| JP3852915B2 (en) * | 2001-11-05 | 2006-12-06 | 九州三井アルミニウム工業株式会社 | Method for producing semi-melt molded billet of aluminum alloy for transportation equipment |
-
2005
- 2005-04-21 US US11/111,585 patent/US20050238529A1/en not_active Abandoned
- 2005-04-22 AU AU2005238478A patent/AU2005238478A1/en not_active Abandoned
- 2005-04-22 MX MXPA06012242A patent/MXPA06012242A/en unknown
- 2005-04-22 KR KR1020067024487A patent/KR20070009719A/en not_active Application Discontinuation
- 2005-04-22 WO PCT/US2005/013766 patent/WO2005106057A2/en active Application Filing
- 2005-04-22 JP JP2007509666A patent/JP2007534839A/en active Pending
- 2005-04-22 CA CA002564078A patent/CA2564078A1/en not_active Abandoned
- 2005-04-22 EP EP05743381A patent/EP1759028A4/en not_active Withdrawn
-
2006
- 2006-11-22 NO NO20065386A patent/NO20065386L/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| EP1759028A4 (en) | 2007-10-03 |
| JP2007534839A (en) | 2007-11-29 |
| NO20065386L (en) | 2007-01-12 |
| EP1759028A2 (en) | 2007-03-07 |
| MXPA06012242A (en) | 2007-01-31 |
| WO2005106057A3 (en) | 2006-01-26 |
| WO2005106057A2 (en) | 2005-11-10 |
| US20050238529A1 (en) | 2005-10-27 |
| AU2005238478A1 (en) | 2005-11-10 |
| KR20070009719A (en) | 2007-01-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |