CN117568678A - High zinc aluminum alloy product - Google Patents
High zinc aluminum alloy product Download PDFInfo
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- CN117568678A CN117568678A CN202311545028.9A CN202311545028A CN117568678A CN 117568678 A CN117568678 A CN 117568678A CN 202311545028 A CN202311545028 A CN 202311545028A CN 117568678 A CN117568678 A CN 117568678A
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- China
- Prior art keywords
- aluminum alloy
- alloy strip
- zinc
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- 229910045601 alloy Inorganic materials 0.000 title description 5
- 239000000956 alloy Substances 0.000 title description 5
- 229910000611 Zinc aluminium Inorganic materials 0.000 title description 4
- HXFVOUUOTHJFPX-UHFFFAOYSA-N alumane;zinc Chemical compound [AlH3].[Zn] HXFVOUUOTHJFPX-UHFFFAOYSA-N 0.000 title description 4
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 322
- 239000011701 zinc Substances 0.000 claims abstract description 209
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 209
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 208
- 230000008859 change Effects 0.000 claims abstract description 56
- 239000011777 magnesium Substances 0.000 claims description 59
- 229910052749 magnesium Inorganic materials 0.000 claims description 59
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 58
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 51
- 229910052802 copper Inorganic materials 0.000 claims description 51
- 239000010949 copper Substances 0.000 claims description 51
- 238000000034 method Methods 0.000 claims description 35
- 239000007787 solid Substances 0.000 claims description 15
- 238000005266 casting Methods 0.000 claims description 14
- 210000001787 dendrite Anatomy 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 description 30
- 239000002184 metal Substances 0.000 description 30
- 239000000523 sample Substances 0.000 description 20
- 238000005275 alloying Methods 0.000 description 16
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 13
- 229910052804 chromium Inorganic materials 0.000 description 13
- 239000011651 chromium Substances 0.000 description 13
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 12
- 229910052726 zirconium Inorganic materials 0.000 description 12
- 229910052782 aluminium Inorganic materials 0.000 description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 10
- 238000005204 segregation Methods 0.000 description 7
- 238000009749 continuous casting Methods 0.000 description 5
- 238000007711 solidification Methods 0.000 description 5
- 230000008023 solidification Effects 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 238000004453 electron probe microanalysis Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 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 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- 229920005479 Lucite® Polymers 0.000 description 2
- 235000014676 Phragmites communis Nutrition 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000010894 electron beam technology Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 239000004926 polymethyl methacrylate Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 238000011179 visual inspection Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000007712 rapid solidification Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229910052706 scandium Inorganic materials 0.000 description 1
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/001—Continuous casting of metals, i.e. casting in indefinite lengths of specific alloys
- B22D11/003—Aluminium alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0622—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by two casting wheels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D21/00—Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedure; Selection of compositions therefor
- B22D21/002—Castings of light metals
- B22D21/007—Castings of light metals with low melting point, e.g. Al 659 degrees C, Mg 650 degrees C
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Continuous Casting (AREA)
- Metal Rolling (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Tunnel Furnaces (AREA)
Abstract
The present invention in one embodiment is a cast product in the form of an aluminum alloy strip. The aluminum alloy strip includes 4wt.% to 28wt.% zinc; and the change in weight percent of the zinc between the surface of the aluminum alloy strip and the center of thickness is 15% or less.
Description
Case division information
The present application is a divisional application of the invention patent application with the application number of 201711392451.4 and the invention name of "high zinc-aluminum alloy product" submitted on the 12 th month 21 of 2017.
RELATED APPLICATIONS
The present application claims priority from U.S. s.n.62/437,489, entitled "high zinc aluminum alloy product," filed on, month 12, day 21 of 2016, which is incorporated herein by reference in its entirety for all purposes.
Technical Field
The present invention relates to cast aluminum alloy products, and products derived therefrom.
Background
Casting aluminum alloys to form cast aluminum alloy products is known.
Disclosure of Invention
In one or more embodiments detailed herein, the present invention is a cast product comprising an aluminum alloy strip; wherein the aluminum alloy strip comprises: 4 to 28wt.% zinc; and wherein the variation in weight percent of zinc between the surface and the center of thickness of the aluminum alloy strip is 15% or less.
In one or more embodiments detailed herein, the aluminum alloy strip includes 6wt.% to 28wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip includes 8wt.% to 28wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip includes 10wt.% to 28wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip includes 4wt.% to 15wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip includes 6wt.% to 12wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip includes 4wt.% to 10wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip includes 4wt.% to 8wt.% zinc.
In one or more embodiments detailed herein, the change in weight percent zinc between the surface and the center of thickness of the aluminum alloy strip is 12% or less.
In one or more embodiments detailed herein, the present invention is a cast product comprising an aluminum alloy strip; wherein the aluminum alloy strip comprises: (i) 4 to 28wt.% zinc; (ii) 1 to 3wt.% copper; and (iii) 1 to 3wt.% magnesium; and wherein the variation in weight percent of zinc between the surface and the center of thickness of the aluminum alloy strip is 15% or less.
In one or more embodiments detailed herein, the aluminum alloy strip includes 4wt.% to 15wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip includes 4wt.% to 12wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip includes 4wt.% to 10wt.% zinc.
In one or more embodiments detailed herein, the aluminum alloy strip includes 1wt.% to 2.5wt.% copper. In one or more embodiments detailed herein, the aluminum alloy strip includes 1wt.% to 2.0wt.% copper. In one or more embodiments detailed herein, the aluminum alloy strip includes 1wt.% to 1.5wt.% copper.
In one or more embodiments detailed herein, the aluminum alloy strip includes 1wt.% to 2.5wt.% magnesium. In one or more embodiments detailed herein, the aluminum alloy strip includes 1wt.% to 2.0wt.% magnesium. In one or more embodiments detailed herein, the aluminum alloy strip includes 1wt.% to 1.5wt.% magnesium.
In one or more embodiments detailed herein, the cast product comprises an aluminum alloy strip; wherein the aluminum alloy strip comprises: 4 to 28wt.% zinc and 1 to 3wt.% copper. In one or more embodiments detailed herein, the zinc weight percent varies by 15% or less between the surface and the center of thickness of the aluminum alloy strip.
Drawings
FIG. 1 is a schematic illustration of a non-limiting method of manufacturing a cast product;
FIG. 2 is an enlarged cross-sectional schematic view of the molten metal delivery nozzle and rolls shown in FIG. 1;
FIG. 3 depicts the change in weight percent zinc from the surface of the cast product to a depth of 3,000 microns thickness;
FIG. 4 depicts the change in weight percent zinc from the surface of the cast product to a depth of 3,000 microns thickness;
FIG. 5 depicts the change in weight percent zinc from the surface of a cast product to a depth of 3,000 microns thickness;
FIG. 6 depicts the change in weight percent zinc from the surface of the cast product to a depth of 3,000 microns thickness;
FIG. 7 depicts the change in weight percent zinc from the surface of the cast product to a depth of 3,000 microns thickness;
FIG. 8 depicts the change in weight percent zinc from the surface of the cast product to a depth of 3,000 microns thickness;
FIG. 9 depicts the change in weight percent zinc from the surface of the cast product to a depth of 3,000 microns thickness;
FIG. 10 depicts the change in weight percent zinc from the surface of the cast product to a depth of 3,000 microns thickness;
FIG. 11 depicts the zinc weight percent change for the entire depth of a prior art ingot obtained by direct chill casting;
FIG. 12 depicts the zinc weight percent change throughout the depth of a prior art cast product;
fig. 13 depicts the weight percentages of zinc, magnesium, and copper across grains from the surface of a cast product to a depth of 200 microns thickness according to an embodiment of the present invention.
FIG. 14 depicts the weight percent of zinc, magnesium, and copper across grains for the entire thickness depth of a prior art direct chill cast product;
FIG. 15 depicts the structure of a cast product according to an embodiment of the present invention;
FIG. 16 depicts the structure of a cast product according to an embodiment of the present invention; and
fig. 17 depicts the structure of a cast product according to an embodiment of the present invention.
The accompanying drawings constitute a part of this specification and include illustrative embodiments of the invention and illustrate various objects and features thereof. In addition, the drawings are not necessarily to scale, some features may be exaggerated to depict details of particular components. Additionally, any measurements, specifications, and the like shown in the figures are intended to be illustrative, and not limiting. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a representative basis for teaching one skilled in the art to variously employ the present invention.
The present invention will be further explained with reference to the appended figures, wherein like structure is referred to by like numerals throughout the several views. The drawings are not necessarily to scale, emphasis instead generally being placed upon illustrating the principles of the invention. In addition, some features may be exaggerated to show details of particular components.
Detailed Description
Other objects and advantages of the present invention will become apparent from the following description, taken in conjunction with the accompanying drawings, in which those benefits and improvements have been disclosed. Detailed embodiments of the present invention are disclosed herein; it is to be understood, however, that the disclosed embodiments are merely illustrative of the invention that may be embodied in various forms. In addition, each example is given in connection with various embodiments of the invention that are intended to be illustrative and not limiting.
Throughout the specification and claims, the following terms take the meanings explicitly associated herein, unless the context clearly dictates otherwise. As used herein, the phrases "in one embodiment" and "in some embodiments" do not necessarily refer to the same embodiment (although they may). Additionally, as used herein, the phrases "in another embodiment" and "in some other embodiments" do not necessarily refer to different embodiments (although they may). Accordingly, as described below, various embodiments of the invention may be readily combined without departing from the scope or spirit of the invention.
In addition, as used herein, the term "or" is an inclusive "or" operator and corresponds to the term "and/or" unless the context clearly dictates otherwise. The term "based on" is not exclusive and allows for being based on other factors not described unless the context clearly dictates otherwise. In addition, throughout the specification, the meaning of "a", "an" and "the" includes plural references. The meaning of "in …" includes "in …" and "on …".
As used herein, the term "at least one of A, B or C" and like terms thereof refer to "a only", "B only", "C only", or any combination of "A, B and C".
In one or more embodiments detailed herein, the present invention is a cast product comprising an aluminum alloy strip; wherein the aluminum alloy strip comprises: 4 to 28wt.% zinc; and wherein the variation in weight percent of zinc between the surface and the center of thickness of the aluminum alloy strip is 15% or less.
In one or more embodiments detailed herein, the aluminum alloy strip includes 6wt.% to 28wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip includes 8wt.% to 28wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip includes 10wt.% to 28wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip includes 4wt.% to 15wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip includes 6wt.% to 12wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip includes 4wt.% to 10wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip includes 4wt.% to 8wt.% zinc.
In one or more embodiments detailed herein, the change in weight percent zinc between the surface and the center of thickness of the aluminum alloy strip is 12% or less.
In one or more embodiments detailed herein, the present invention is a cast product comprising an aluminum alloy strip; wherein the aluminum alloy strip comprises: (i) 4 to 28wt.% zinc; (ii) 1 to 3wt.% copper; (iii) 1 to 3wt.% magnesium; and wherein the variation in weight percent of zinc between the surface and the center of thickness of the aluminum alloy strip is 15% or less.
In one or more embodiments detailed herein, the aluminum alloy strip includes 4wt.% to 15wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip includes 4wt.% to 12wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip includes 4wt.% to 10wt.% zinc.
In one or more embodiments detailed herein, the aluminum alloy strip includes 1wt.% to 2.5wt.% copper. In one or more embodiments detailed herein, the aluminum alloy strip includes 1wt.% to 2.0wt.% copper. In one or more embodiments detailed herein, the aluminum alloy strip includes 1wt.% to 1.5wt.% copper.
In one or more embodiments detailed herein, the aluminum alloy strip includes 1wt.% to 2.5wt.% magnesium. In one or more embodiments detailed herein, the aluminum alloy strip includes 1wt.% to 2.0wt.% magnesium. In one or more embodiments detailed herein, the aluminum alloy strip includes 1wt.% to 1.5wt.% magnesium.
In one or more embodiments detailed herein, the cast product comprises an aluminum alloy strip; wherein the aluminum alloy strip comprises: 4 to 28wt.% zinc and 1 to 3wt.% copper. In one or more embodiments detailed herein, the zinc weight percent varies by 15% or less between the surface and the center of thickness of the aluminum alloy strip.
In one or more embodiments detailed herein, the present invention is a cast product comprising an aluminum alloy strip; wherein the aluminum alloy strip comprises: 4 to 25wt.% zinc; and wherein the zinc weight percent varies by 15% or less between the surface of the aluminum alloy strip and a depth of 3,000 microns thickness.
In one or more embodiments detailed herein, the aluminum alloy strip includes 6wt.% to 25wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip includes 8wt.% to 25wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip includes 10wt.% to 25wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip includes 4wt.% to 15wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip includes 4wt.% to 12wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip includes 4wt.% to 10wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip includes 4wt.% to 8wt.% zinc.
In one or more embodiments detailed herein, the change in weight percent zinc between the surface of the aluminum alloy strip and a depth of 3,000 microns thickness is 12% or less.
In one or more embodiments detailed herein, the present invention is a cast product comprising an aluminum alloy strip; wherein the aluminum alloy strip comprises: (i) 4 to 25wt.% zinc; (ii) 1 to 3wt.% copper; (iii) 1 to 3wt.% magnesium; and wherein the zinc weight percent varies by 15% or less between the surface of the aluminum alloy strip and a depth of 3,000 microns thickness.
In one or more embodiments detailed herein, the aluminum alloy strip includes 4wt.% to 15wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip includes 4wt.% to 12wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip includes 4wt.% to 10wt.% zinc.
In one or more embodiments detailed herein, the aluminum alloy strip includes 1wt.% to 2.5wt.% copper. In one or more embodiments detailed herein, the aluminum alloy strip comprises 1wt.% to 2.0 wt.% copper. In one or more embodiments detailed herein, the aluminum alloy strip includes 1wt.% to 1.5wt.% copper.
In one or more embodiments detailed herein, the aluminum alloy strip includes 1wt.% to 2.5wt.% magnesium. In one or more embodiments detailed herein, the aluminum alloy strip comprises 1wt.% to 2.0 wt.% magnesium. In one or more embodiments detailed herein, the aluminum alloy strip includes 1wt.% to 1.5wt.% magnesium.
As used herein, the term "aluminum alloy" refers to aluminum metal having soluble elements within the aluminum lattice or within the aluminum phase. The elements may include aluminum, copper, iron, magnesium, nickel, silicon, zinc, chromium, manganese, titanium, vanadium, zirconium, tin, scandium, lithium. Elements are added that can affect the physical and performance characteristics of the aluminum alloy.
As used herein, the phrase "7xxx aluminum alloys" and similar phrases thereof refer to aluminum alloys selected from the group consisting of 7xxx aluminum alloys registered with the aluminum association (Aluminum Association) and unregistered variants thereof.
As used herein, the term "cast product" refers to a product that has been produced using a casting process (e.g., continuous casting, as detailed in U.S. Pat. nos. 6,672,368 and 7,125,612). In one or more embodiments detailed herein, the term "cast product" includes products produced from "cast products". In one or more embodiments, the term "cast product" includes a rolled product produced from "cast product".
As used herein, the term "change" in weight percent of alloying element at a specified thickness depth has a "%" unit and is calculated according to the following equation:
(maximum weight percent of alloying element at the specified thickness depth-minimum weight percent of alloying element at the specified thickness depth)/(average weight percent of alloying element at the specified thickness depth) ×100.
As used herein, the term "centerline segregation" refers to the enrichment or depletion of alloying elements in the central portion of the aluminum alloy strip. In an embodiment, centerline segregation is determined based on the change in weight percent of alloying elements at a specified thickness depth of the aluminum alloy strip. In one or more embodiments detailed herein, centerline segregation is determined based on a change in weight percent of alloying elements of greater than 15% between the surface and a depth of 3,000 microns thickness. In one or more embodiments detailed herein, centerline segregation is determined based on a change in weight percent of alloying elements of greater than 15% between the surface and thickness center of the aluminum alloy strip.
As used herein, "weight percent of alloying elements" at a specified thickness depth is determined using the "macrosegregation procedure" detailed herein.
As used herein, the term "bar" can have any suitable thickness and is typically a sheet gauge (0.006 inch to 0.249 inch) or a sheet gauge (0.250 inch to 0.400 inch), i.e., having a thickness in the range of 0.006 inch to 0.400 inch. In one embodiment, the strip has a thickness of at least 0.040 inches. In one embodiment, the strip has a thickness of less than 0.320 inches. In one or more embodiments detailed herein, the strip has a thickness of 0.0070 to 0.18 inches. In one or more embodiments detailed herein, the strip has a thickness of 0.08 to 0.2 inches.
As used herein, "surface" refers to the top or bottom surface of a cast product.
As used herein, "thickness center" refers to the depth of half or half of the total thickness (t/2) of the cast product.
In one or more embodiments detailed herein, the aluminum alloy strip may include any aluminum alloy having 4wt.% to 28wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip may include at least one of 1wt.% to 3wt.% copper and 1wt.% to 3wt.% magnesium. In one or more embodiments detailed herein, the aluminum alloy can include a 7xxx (zinc-based) aluminum alloy.
In one or more embodiments detailed herein, the aluminum alloy strip has 4wt.% to 28wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip has 4wt.% to 27wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip has 4wt.% to 25wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip has 4wt.% to 22wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip has 4wt.% to 20wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip has 4wt.% to 18wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip has 4wt.% to 15wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip has 4wt.% to 13wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip has 4wt.% to 11wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip has 4wt.% to 10wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip has 4wt.% to 9wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip has 4wt.% to 8wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip has 4wt.% to 7wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip has 4wt.% to 6wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip has 4wt.% to 5wt.% zinc.
In one or more embodiments detailed herein, the aluminum alloy strip includes 5wt.% to 28wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip has 6wt.% to 28wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip has 7wt.% to 28wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip has 8wt.% to 28wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip has 9wt.% to 28wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip has 10wt.% to 28wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip has 11wt.% to 28wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip has 13wt.% to 28wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip has 15wt.% to 28wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip has 18wt.% to 28wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip has 20wt.% to 28wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip has 22wt.% to 28wt.% zinc.
In one or more embodiments detailed herein, the aluminum alloy strip includes 5wt.% to 27wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip has 7wt.% to 25wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip has 8wt.% to 23wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip has 9wt.% to 20wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip has 10wt.% to 18wt.% zinc. In one or more embodiments detailed herein, the aluminum alloy strip has 12wt.% to 15wt.% zinc.
In one or more embodiments detailed herein, the aluminum alloy strip has 1wt.% to 2.8wt.% copper. In one or more embodiments detailed herein, the aluminum alloy strip has 1wt.% to 2.6wt.% copper. In one or more embodiments detailed herein, the aluminum alloy strip has 1wt.% to 2.4wt.% copper. In one or more embodiments detailed herein, the aluminum alloy strip has 1wt.% to 2.2wt.% copper. In one or more embodiments detailed herein, the aluminum alloy strip has 1wt.% to 2.0 wt.% copper. In one or more embodiments detailed herein, the aluminum alloy strip has 1wt.% to 1.8wt.% copper. In one or more embodiments detailed herein, the aluminum alloy strip has 1wt.% to 1.6wt.% copper. In one or more embodiments detailed herein, the aluminum alloy strip has 1wt.% to 1.4wt.% copper. In one or more embodiments detailed herein, the aluminum alloy strip has 1wt.% to 1.2wt.% copper.
In one or more embodiments detailed herein, the aluminum alloy strip has 1.2wt.% to 3wt.% copper. In one or more embodiments detailed herein, the aluminum alloy strip has 1.4wt.% to 3wt.% copper. In one or more embodiments detailed herein, the aluminum alloy strip has 1.6wt.% to 3wt.% copper. In one or more embodiments detailed herein, the aluminum alloy strip has 1.8wt.% to 3wt.% copper. In one or more embodiments detailed herein, the aluminum alloy strip has 2.0wt.% to 3wt.% copper. In one or more embodiments detailed herein, the aluminum alloy strip has 2.2wt.% to 3wt.% copper. In one or more embodiments detailed herein, the aluminum alloy strip has 2.4wt.% to 3wt.% copper. In one or more embodiments detailed herein, the aluminum alloy strip has 2.6wt.% to 3wt.% copper. In one or more embodiments detailed herein, the aluminum alloy strip has 2.8wt.% to 3wt.% copper.
In one or more embodiments detailed herein, the aluminum alloy strip has 1.2wt.% to 2.8wt.% copper. In one or more embodiments detailed herein, the aluminum alloy strip has 1.4wt.% to 2.6wt.% copper. In one or more embodiments detailed herein, the aluminum alloy strip has 1.6wt.% to 2.4wt.% copper. In one or more embodiments detailed herein, the aluminum alloy strip has 1.8wt.% to 2.2wt.% copper.
In one or more embodiments detailed herein, the aluminum alloy strip has 1wt.% to 2.8wt.% magnesium. In one or more embodiments detailed herein, the aluminum alloy strip has 1wt.% to 2.6wt.% magnesium. In one or more embodiments detailed herein, the aluminum alloy strip has 1wt.% to 2.4wt.% magnesium. In one or more embodiments detailed herein, the aluminum alloy strip has 1wt.% to 2.2wt.% magnesium. In one or more embodiments detailed herein, the aluminum alloy strip has 1wt.% to 2.0wt.% magnesium. In one or more embodiments detailed herein, the aluminum alloy strip has 1wt.% to 1.8wt.% magnesium. In one or more embodiments detailed herein, the aluminum alloy strip has 1wt.% to 1.6wt.% magnesium. In one or more embodiments detailed herein, the aluminum alloy strip has 1wt.% to 1.4wt.% magnesium. In one or more embodiments detailed herein, the aluminum alloy strip has 1wt.% to 1.2wt.% magnesium.
In one or more embodiments detailed herein, the aluminum alloy strip has 1.2wt.% to 3wt.% magnesium. In one or more embodiments detailed herein, the aluminum alloy strip has 1.4wt.% to 3wt.% magnesium. In one or more embodiments detailed herein, the aluminum alloy strip has 1.6wt.% to 3wt.% magnesium. In one or more embodiments detailed herein, the aluminum alloy strip has 1.8wt.% to 3wt.% magnesium. In one or more embodiments detailed herein, the aluminum alloy strip has 2.0wt.% to 3wt.% magnesium. In one or more embodiments detailed herein, the aluminum alloy strip has 2.2wt.% to 3wt.% magnesium. In one or more embodiments detailed herein, the aluminum alloy strip has 2.4wt.% to 3wt.% magnesium. In one or more embodiments detailed herein, the aluminum alloy strip has 2.6wt.% to 3wt.% magnesium. In one or more embodiments detailed herein, the aluminum alloy strip has 2.8wt.% to 3wt.% magnesium.
In one or more embodiments detailed herein, the aluminum alloy strip has 1.2wt.% to 2.8wt.% magnesium. In one or more embodiments detailed herein, the aluminum alloy strip has 1.4wt.% to 2.6wt.% magnesium. In one or more embodiments detailed herein, the aluminum alloy strip has 1.6wt.% to 2.4wt.% magnesium. In one or more embodiments detailed herein, the aluminum alloy strip has 1.8wt.% to 2.2wt.% magnesium.
In one or more embodiments detailed herein, the aluminum alloy strip has 0.1wt.% to 1.0wt.% magnesium. In one or more embodiments detailed herein, the aluminum alloy strip has 0.2wt.% to 1.0wt.% magnesium. In one or more embodiments detailed herein, the aluminum alloy strip has 0.4wt.% to 1.0wt.% magnesium. In one or more embodiments detailed herein, the aluminum alloy strip has 0.6wt.% to 1.0wt.% magnesium. In one or more embodiments detailed herein, the aluminum alloy strip has 0.8wt.% to 1.0wt.% magnesium.
In one or more embodiments detailed herein, the aluminum alloy strip has 0.1wt.% to 0.8wt.% magnesium. In one or more embodiments detailed herein, the aluminum alloy strip has 0.1wt.% to 0.9wt.% magnesium. In one or more embodiments detailed herein, the aluminum alloy strip has 0.1wt.% to 0.7wt.% magnesium. In one or more embodiments detailed herein, the aluminum alloy strip has 0.1wt.% to 0.5wt.% magnesium. In one or more embodiments detailed herein, the aluminum alloy strip has 0.1wt.% to 0.3wt.% magnesium.
In one or more embodiments detailed herein, the aluminum alloy strip has 0.05wt.% to 0.3wt.% chromium. In one or more embodiments detailed herein, the aluminum alloy strip has 0.1wt.% to 0.3wt.% chromium. In one or more embodiments detailed herein, the aluminum alloy strip has 0.15wt.% to 0.3wt.% chromium. In one or more embodiments detailed herein, the aluminum alloy strip has 0.2wt.% to 0.3wt.% chromium. In one or more embodiments detailed herein, the aluminum alloy strip has 0.25wt.% to 0.3wt.% chromium.
In one or more embodiments detailed herein, the aluminum alloy strip has 0.05wt.% to 0.25wt.% chromium. In one or more embodiments detailed herein, the aluminum alloy strip has 0.05wt.% to 0.2wt.% chromium. In one or more embodiments detailed herein, the aluminum alloy strip has 0.05wt.% to 0.15wt.% chromium. In one or more embodiments detailed herein, the aluminum alloy strip has 0.05wt.% to 0.1wt.% chromium. In one or more embodiments detailed herein, the aluminum alloy strip has 0.15wt.% to 0.25wt.% chromium.
In one or more embodiments detailed herein, the aluminum alloy strip has 0.04wt.% to 0.25wt.% zirconium. In one or more embodiments detailed herein, the aluminum alloy strip has 0.04wt.% to 0.2wt.% zirconium. In one or more embodiments detailed herein, the aluminum alloy strip has 0.04wt.% to 0.18wt.% zirconium. In one or more embodiments detailed herein, the aluminum alloy strip has 0.04wt.% to 0.15wt.% zirconium. In one or more embodiments detailed herein, the aluminum alloy strip has 0.04wt.% to 0.1wt.% zirconium.
In one or more embodiments detailed herein, the aluminum alloy strip has 0.1wt.% to 0.25wt.% zirconium. In one or more embodiments detailed herein, the aluminum alloy strip has 0.15wt.% to 0.25wt.% zirconium. In one or more embodiments detailed herein, the aluminum alloy strip has 0.2wt.% to 0.25wt.% zirconium.
In one or more embodiments detailed herein, the aluminum alloy strip has 0.07wt.% to 0.14wt.% zirconium.
In one or more embodiments detailed herein, the aluminum alloy strip includes at least one of zinc, copper, magnesium, manganese, chromium, or zirconium. In one or more embodiments detailed herein, the aluminum alloy strip is free of at least one of copper, magnesium, manganese, chromium, or zirconium.
In one or more embodiments detailed herein, the aluminum alloy strip can contain a second element and/or other elements. As used herein, the "second element" is Fe, si, and/or Ti. As used herein, "other elements" include any element of the periodic table other than aluminum (Al), zn, cu, mn, cr, zr, mg, fe, si, and/or Ti.
In one or more embodiments detailed herein, the zinc weight percent varies by 15% or less between the surface and the center of thickness of the aluminum alloy strip. In one or more embodiments detailed herein, the change in weight percent zinc between the surface and the center of thickness of the aluminum alloy strip is 14% or less. In one or more embodiments detailed herein, the change in weight percent zinc between the surface and the center of thickness of the aluminum alloy strip is 13% or less. In one or more embodiments detailed herein, the change in weight percent zinc between the surface and the center of thickness of the aluminum alloy strip is 12% or less. In one or more embodiments detailed herein, the change in weight percent zinc between the surface and the center of thickness of the aluminum alloy strip is 11% or less. In one or more embodiments detailed herein, the change in weight percent zinc between the surface and the center of thickness of the aluminum alloy strip is 10% or less. In one or more embodiments detailed herein, the change in weight percent zinc between the surface and the center of thickness of the aluminum alloy strip is 9% or less. In one or more embodiments detailed herein, the change in weight percent zinc between the surface and the center of thickness of the aluminum alloy strip is 8% or less. In one or more embodiments detailed herein, the change in weight percent zinc between the surface and the center of thickness of the aluminum alloy strip is 7% or less. In one or more embodiments detailed herein, the change in weight percent zinc between the surface and the center of thickness of the aluminum alloy strip is 6% or less. In one or more embodiments detailed herein, the change in weight percent zinc between the surface and the center of thickness of the aluminum alloy strip is 5% or less. In one or more embodiments detailed herein, the change in weight percent zinc between the surface and the center of thickness of the aluminum alloy strip is 4% or less. In one or more embodiments detailed herein, the change in weight percent zinc between the surface and the center of thickness of the aluminum alloy strip is 3% or less. In one or more embodiments detailed herein, the change in weight percent zinc between the surface and the center of thickness of the aluminum alloy strip is 2% or less.
In one or more embodiments detailed herein, the zinc weight percent varies from 0.1% to 15% between the surface and the thickness center of the aluminum alloy strip. In one or more embodiments detailed herein, the zinc weight percent varies from 0.1% to 14% between the surface and the thickness center of the aluminum alloy strip. In one or more embodiments detailed herein, the zinc weight percent varies from 0.1% to 13% between the surface and the thickness center of the aluminum alloy strip. In one or more embodiments detailed herein, the zinc weight percent varies from 0.1% to 12% between the surface and the thickness center of the aluminum alloy strip. In one or more embodiments detailed herein, the zinc weight percent varies from 0.1% to 11% between the surface and the thickness center of the aluminum alloy strip. In one or more embodiments detailed herein, the zinc weight percent varies from 0.1% to 10% between the surface and the thickness center of the aluminum alloy strip. In one or more embodiments detailed herein, the zinc weight percent varies from 0.1% to 9% between the surface and the thickness center of the aluminum alloy strip. In one or more embodiments detailed herein, the zinc weight percent varies from 0.1% to 8% between the surface and the thickness center of the aluminum alloy strip. In one or more embodiments detailed herein, the zinc weight percent varies from 0.1% to 7% between the surface and the thickness center of the aluminum alloy strip. In one or more embodiments detailed herein, the change in zinc weight percent between the surface and the center of thickness of the aluminum alloy strip is 0.1% to 6%. In one or more embodiments detailed herein, the zinc weight percent varies from 0.1% to 5% between the surface and the thickness center of the aluminum alloy strip. In one or more embodiments detailed herein, the zinc weight percent varies from 0.1% to 4% between the surface and the thickness center of the aluminum alloy strip.
In one or more embodiments detailed herein, the zinc weight percent varies from 1% to 15% between the surface and the thickness center of the aluminum alloy strip. In one or more embodiments detailed herein, the zinc weight percent varies from 2% to 15% between the surface and the thickness center of the aluminum alloy strip. In one or more embodiments detailed herein, the zinc weight percent varies from 3% to 15% between the surface and the thickness center of the aluminum alloy strip. In one or more embodiments detailed herein, the change in weight percent zinc between the surface and the center of thickness of the aluminum alloy strip is 4% to 15%. In one or more embodiments detailed herein, the zinc weight percent varies from 5% to 15% between the surface and the center of thickness of the aluminum alloy strip. In one or more embodiments detailed herein, the change in weight percent zinc between the surface and the center of thickness of the aluminum alloy strip is 6% to 15%. In one or more embodiments detailed herein, the zinc weight percent varies from 7% to 15% between the surface and the thickness center of the aluminum alloy strip. In one or more embodiments detailed herein, the zinc weight percent varies from 8% to 15% between the surface and the thickness center of the aluminum alloy strip. In one or more embodiments detailed herein, the change in weight percent zinc between the surface and the center of thickness of the aluminum alloy strip is 9% to 15%. In one or more embodiments detailed herein, the zinc weight percent varies from 10% to 15% between the surface and the thickness center of the aluminum alloy strip. In one or more embodiments detailed herein, the change in weight percent zinc between the surface and the center of thickness of the aluminum alloy strip is 11% to 15%. In one or more embodiments detailed herein, the zinc weight percent varies from 12% to 15% between the surface and the thickness center of the aluminum alloy strip.
In one or more embodiments detailed herein, the zinc weight percent varies by 15% or less between the surface of the aluminum alloy strip and a depth of 3,000 microns thickness. In one or more embodiments detailed herein, the change in weight percent zinc between the surface of the aluminum alloy strip and a depth of 3,000 microns thickness is 14% or less. In one or more embodiments detailed herein, the change in weight percent zinc between the surface of the aluminum alloy strip and a depth of 3,000 microns thickness is 13% or less. In one or more embodiments detailed herein, the change in weight percent zinc between the surface of the aluminum alloy strip and a depth of 3,000 microns thickness is 12% or less. In one or more embodiments detailed herein, the change in weight percent zinc between the surface of the aluminum alloy strip and a depth of 3,000 microns thickness is 11% or less. In one or more embodiments detailed herein, the change in weight percent zinc between the surface of the aluminum alloy strip and a depth of 3,000 microns thickness is 10% or less. In one or more embodiments detailed herein, the change in weight percent zinc between the surface of the aluminum alloy strip and a depth of 3,000 microns thickness is 9% or less. In one or more embodiments detailed herein, the change in weight percent zinc between the surface of the aluminum alloy strip and a depth of 3,000 microns thickness is 8% or less. In one or more embodiments detailed herein, the change in weight percent zinc between the surface of the aluminum alloy strip and a depth of 3,000 microns thickness is 7% or less. In one or more embodiments detailed herein, the change in weight percent zinc between the surface of the aluminum alloy strip and a depth of 3,000 microns thickness is 6% or less. In one or more embodiments detailed herein, the change in weight percent zinc between the surface of the aluminum alloy strip and a depth of 3,000 microns thickness is 5% or less. In one or more embodiments detailed herein, the change in weight percent zinc between the surface of the aluminum alloy strip and a depth of 3,000 microns thickness is 4% or less. In one or more embodiments detailed herein, the change in weight percent zinc between the surface of the aluminum alloy strip and a depth of 3,000 microns thickness is 3% or less. In one or more embodiments detailed herein, the change in weight percent zinc between the surface of the aluminum alloy strip and a depth of 3,000 microns thickness is 2% or less.
In one or more embodiments detailed herein, the zinc weight percent varies from 0.1% to 15% between the surface of the aluminum alloy strip and a depth of 3,000 microns thickness. In one or more embodiments detailed herein, the zinc weight percent varies from 0.1% to 14% between the surface of the aluminum alloy strip and a depth of 3,000 microns thickness. In one or more embodiments detailed herein, the zinc weight percent varies from 0.1% to 13% between the surface of the aluminum alloy strip and a depth of 3,000 microns thickness. In one or more embodiments detailed herein, the zinc weight percent varies from 0.1% to 12% between the surface of the aluminum alloy strip and a depth of 3,000 microns thickness. In one or more embodiments detailed herein, the zinc weight percent varies from 0.1% to 11% between the surface of the aluminum alloy strip and a depth of 3,000 microns thickness. In one or more embodiments detailed herein, the zinc weight percent varies from 0.1% to 10% between the surface of the aluminum alloy strip and a depth of 3,000 microns thickness. In one or more embodiments detailed herein, the zinc weight percent varies from 0.1% to 9% between the surface of the aluminum alloy strip and a depth of 3,000 microns thickness. In one or more embodiments detailed herein, the zinc weight percent varies from 0.1% to 8% between the surface of the aluminum alloy strip and a depth of 3,000 microns thickness. In one or more embodiments detailed herein, the zinc weight percent varies from 0.1% to 7% between the surface of the aluminum alloy strip and a depth of 3,000 microns thickness. In one or more embodiments detailed herein, the zinc weight percent varies from 0.1% to 6% between the surface of the aluminum alloy strip and a depth of 3,000 microns thickness. In one or more embodiments detailed herein, the zinc weight percent varies from 0.1% to 5% between the surface of the aluminum alloy strip and a depth of 3,000 microns thickness. In one or more embodiments detailed herein, the zinc weight percent varies from 0.1% to 4% between the surface of the aluminum alloy strip and a depth of 3,000 microns thickness.
In one or more embodiments detailed herein, the zinc weight percent varies from 1% to 15% between the surface of the aluminum alloy strip and a depth of 3,000 microns thickness. In one or more embodiments detailed herein, the zinc weight percent varies from 2% to 15% between the surface of the aluminum alloy strip and a depth of 3,000 microns thickness. In one or more embodiments detailed herein, the zinc weight percent varies from 3% to 15% between the surface of the aluminum alloy strip and a depth of 3,000 microns thickness. In one or more embodiments detailed herein, the zinc weight percent varies from 4% to 15% between the surface of the aluminum alloy strip and a depth of 3,000 microns thickness. In one or more embodiments detailed herein, the zinc weight percent varies from 5% to 15% between the surface of the aluminum alloy strip and a depth of 3,000 microns thickness. In one or more embodiments detailed herein, the zinc weight percent varies from 6% to 15% between the surface of the aluminum alloy strip and a depth of 3,000 microns thickness. In one or more embodiments detailed herein, the zinc weight percent varies from 7% to 15% between the surface of the aluminum alloy strip and a depth of 3,000 microns thickness. In one or more embodiments detailed herein, the zinc weight percent varies from 8% to 15% between the surface of the aluminum alloy strip and a depth of 3,000 microns thickness. In one or more embodiments detailed herein, the zinc weight percent varies from 9% to 15% between the surface of the aluminum alloy strip and a depth of 3,000 microns thickness. In one or more embodiments detailed herein, the zinc weight percent varies from 10% to 15% between the surface of the aluminum alloy strip and a depth of 3,000 microns thickness. In one or more embodiments detailed herein, the zinc weight percent varies from 11% to 15% between the surface of the aluminum alloy strip and a depth of 3,000 microns thickness. In one or more embodiments detailed herein, the zinc weight percent varies from 12% to 15% between the surface of the aluminum alloy strip and a depth of 3,000 microns thickness.
In one or more embodiments detailed herein, the aluminum alloy has a zinc weight percent of 4% to 28% or any other weight percent range detailed herein and does not exhibit centerline segregation.
Non-limiting method for producing aluminum alloy strips
In embodiments, the casting of aluminum alloy strips detailed herein may be accomplished by a continuous casting apparatus capable of continuously producing cast products that solidify at a high solidification rate. A real object of the continuous casting apparatus capable of achieving the above solidification rateExamples are the devices described in U.S. Pat. nos. 6,672,368 and 7,125,612, which are incorporated herein by reference in their entirety. In one or more embodiments detailed herein, micromill described in U.S. Pat. nos. 6,672,368 and 7,125,612 is used TM The method continuously casts the aluminum alloy strip.
In the embodiment as illustrated in fig. 1-2, molten aluminum alloy metal M may be stored in a hopper H (or funnel) and conveyed through a feed nozzle T in a direction B to a pair of rollers having respective roller surfaces D 1 And D 2 Roller R of (2) 1 And R is 2 The rollers being respectively oriented in the corresponding direction A 1 And A 2 And rotated to produce a solid cast product S. In one or more embodiments detailed herein, the feed nozzle T and the corresponding roller R 1 And R is 2 Can maintain a gap G as small as possible 1 And G 2 To prevent leakage of molten metal and to minimize exposure to the surrounding molten metal while maintaining the feed nozzle T and the roll R 1 And R is 2 The interval between them. Through roller R 1 And R is R 2 Is passed through the roller R 1 And R is R 2 The smallest gap area between them is called the nip N.
In one or more embodiments detailed herein, during casting, molten metal M directly contacts chill roll R in regions 2 and 4, respectively 1 And R is 2 . And roller R 1 And R is 2 After contact, the metal M begins to cool and solidify. The metal in the cooling produces a metal-free alloy with the roller R 1 Adjacent upper layer solidified metal shell 6 and roller R 2 Adjacent lower layers solidify the metal shell 8. The thickness of the shells 6 and 8 increases as the metal M proceeds towards the nip N. Large dendrites 10 of solidified metal (not shown to scale) may be generated at the interface between each of the upper and lower shells 6, 8 and the molten metal M. The large dendrites 10 may be broken up and dragged into the center portion 12 of the slowly moving flow of molten metal M and may follow arrow C 1 And C 2 Is carried in the direction of (a). The dragging action of the moving stream can cause the large dendrites 10 to break further into smaller dendrites 14 (not shown to scale). In what is called zone 1 In the central portion 12 upstream of the nip N of 6, the metal M is semi-solid and may include a solid component (solidified small dendrites 14) and a molten metal component. The metal M in the region 16 may have a fluid consistency due in part to the small dendrites 14 dispersed therein. At the location of nip N, some of the molten metal may be directed toward the nip C 1 And C 2 The opposite direction presses back. Roller R 1 And R is 2 The forward rotation at nip N essentially advances only the solid portion of the metal (the upper and lower shells 6, 8 and the small dendrites 14 in the central portion 12) while forcing the molten metal into the central portion 12 upstream of nip N so that the metal can be completely solid at the point of exit from nip N. In this manner and in one or more embodiments detailed herein, a solidified metal front may be formed at nip N. Downstream of the nip N, the central portion 12 may be a solid central portion 18 containing small dendrites 14, which is sandwiched between the upper shell 6 and the lower shell 8. In the central portion 18, the small dendrites 14 may have a size of 20 micrometers to 50 micrometers and have a generally spherical shape. The three parts of the upper and lower shells 6, 8 and the solidified central portion 18 constitute a single solid cast product (S in fig. 1 and element 20 in fig. 2). Thus, the aluminum alloy cast product 20 may include a first portion of aluminum alloy and a second portion of aluminum alloy (corresponding to the shells 6 and 8) and intermediate portions thereof (the solidified central portion 18). The solid central portion 18 may comprise 20% to 30% of the total thickness of the cast product 20.
Roller R 1 And R is 2 Can act as a heat sink for the molten metal M. In one embodiment, the heat of the molten metal M may be transferred to the rolls R in a uniform manner 1 And R is 2 To ensure uniformity of the surface of the cast product 20. Corresponding roller R 1 And R is 2 Surface D of (2) 1 And D 2 May be made of steel, copper, nickel or other suitable material and may be textured and may include surface irregularities (not shown) that may contact the molten metal M.
Control, maintenance and selection of the roller R 1 And R is 2 May affect the ability to continuously cast the product. Roller speedThe speed at which the molten metal M advances toward the nip N is determined. If the velocity is too slow, the large dendrites 10 are not sufficiently forced to become entrained in the central portion 12 and fracture into small dendrites 14. In one or more embodiments detailed herein, the roll speed may be selected such that a solidification front or complete solidification point of the molten metal M may be established at the nip N. Accordingly, the casting apparatus and method of the present invention may be adapted to operate at high speeds, such as 25 to 500 feet per minute; or 40 to 500 feet/minute; or 40 to 400 feet/minute; or 100 to 400 feet/minute; and alternatively speeds in the range of 150 to 300 feet per minute. The molten aluminum is delivered to the roll R 1 And R is 2 The linear velocity per unit area of (a) may be smaller than that of the roller R 1 And R is 2 About one-fourth of the speed of the roll or roller.
Continuous casting of aluminum alloys according to the present invention may be accomplished by first selecting the desired dimensions of the nip N corresponding to the desired specifications of the cast product S. Roller R 1 And R is 2 May be increased to a desired production rate or to a rate that is less than the rate that causes the roll separation force to increase to indicate roll R 1 And R is R 2 A horizontal speed at which rolling occurs. Casting at rates (i.e., 25 to 400 feet per minute) encompassed by embodiments of the present invention results in an aluminum alloy cast product having a solidification rate of about 1000 times that of an aluminum alloy cast in ingot form and results in an improvement in the characteristics of the cast product relative to an aluminum alloy cast in ingot form. The rate at which the molten metal is cooled may be selected to achieve rapid solidification of the outer region of the metal. Indeed, cooling of the metallic outer layer region may occur at a rate of at least 1000 degrees celsius/second.
The continuous casting strip may have any suitable thickness and is typically of sheet gauge (0.006 inch to 0.249 inch) or sheet gauge (0.250 inch to 0.400 inch), i.e., having a thickness in the range of 0.006 inch to 0.400 inch. In one embodiment, the strip has a thickness of at least 0.040 inches. In one embodiment, the strip has a thickness of less than 0.320 inches.
Macrosegregation procedure
The samples were first fixed and polished at Lucite using standard metallographic preparation techniques for aluminum. The distribution of the alloying element throughout the thickness was characterized using an electron probe microanalyzer ("EPMA") to delineate the macrosegregation of the alloying element.
An EPMA line scan was set with an initial spot diameter of 100 microns, moving in the thickness direction from about 50 microns from the sample surface until the other surface was reached. The defocused beam spot, which can maintain a 50 micron pitch, was calculated to provide 50% overlap between points.
Data were collected using a JEOL JXA 8530F field emission electron probe microanalyzer Hyperprobe in combination with a 4 wave dispersion spectrometer and a JEOL SDD-EDS. The operating conditions are:
acceleration voltage: 15kV
Beam intensity: 100nA
Defocused electron beam: 100 μm
Line scan feature step size 50 μm
The analyzed elements may include: ti, zr, mg, si, mn, fe, cu, zn and Al
Wave Dispersion Spectrometer (WDS) crystals and spectrometers were used as detailed in table 1.
TABLE 1
The count time of all elements is 10 seconds
Background measurements were collected every 50 spots for 5 seconds at both positive and negative background positions. The measured elements were quantitatively analyzed using the JEOL quantitative ZAF analysis package for metals, with atomic numbers corrected using the Philibert-Tixier method and fluorescence excitation corrected using the Reed method.
Alternatively, the concentration of alloying elements throughout the depth of the sample is determined using a light meter according to the method used to analyze the sample in U.S. Pat. No. 6,672,368.
Microsegregation procedure
The samples were first fixed and polished at Lucite using standard metallographic preparation techniques for aluminum. The distribution of alloying elements throughout the thickness was characterized using EPMA to delineate microscopic segregation of alloying elements.
An EPMA line scan is set in which the focal spot is moved across several dies in 1 micron steps to get an overlapping point through multiple dies.
Data were collected using a JEOL JXA 8530F field emission electron probe microanalyzer Hyperprobe in combination with a 4 wave dispersion spectrometer and a JEOL SDD-EDS. The operating conditions are:
acceleration voltage: 15kV
Beam intensity: 100nA
Focusing an electron beam
Line scanning characteristic step length 1 mu m
The analyzed elements may include: ti, zr, mg, si, mn, fe, cu, zn and Al
WDS crystals and spectrometers were used as detailed in table 1.
Background measurements were collected every 50 spots for 5 seconds at both positive and negative background positions. The measured elements were quantitatively analyzed using the JEOL quantitative ZAF analysis package for metals, with atomic numbers corrected using the Philibert-Tixier method and fluorescence excitation corrected using the Reed method.
Non-limiting examples
Using the apparatus detailed in U.S. patent No. 6,672,368, samples of aluminum alloy were cast at speeds of 55 feet/min to 85 feet/min and had final thicknesses as detailed in the following table. The average weight percentages of zinc, magnesium and copper from the surface of each sample to a depth of 3,000 microns thickness were determined using the "macrosegregation" procedure detailed herein or by light gauge. Table 2 below presents the average weight percentages of zinc, copper, and magnesium from the surface of each cast sample to a thickness depth of 3,000 microns and the method used to determine the weight percentages for each sample:
TABLE 2
Table 3 below shows the change in weight percent zinc from the surface of each sample to a depth of 3,000 microns thickness:
TABLE 3 Table 3
The average weight percentages of zinc, magnesium and copper from the surface to the center of thickness of each sample were determined using the "macrosegregation" procedure detailed herein or by light meter. Table 4 below presents the average weight percentages of zinc, copper, and magnesium from the surface to the thickness center of each cast sample and the method used to determine the weight percentage for each sample:
TABLE 4 Table 4
Table 5 below shows the change in weight percent zinc in each sample from the surface to the thickness center of each sample:
TABLE 5
The data generated for each sample is plotted in fig. 3-10. A comparison of the weight percentages of zinc, magnesium and copper for the entire thickness of the prior art direct chill cast product and the prior art continuous cast product of U.S. patent No. 6,672,368 is also included as figures 11-12 for comparison.
As shown in fig. 3-10 and the table above, the inventors surprisingly found that the zinc weight percent variation between the surface of samples 1 to 7 according to the invention and a depth of 3,000 microns thickness was less than 15%. In addition, the zinc weight percent variation between the surface of sample 8 and the depth of 3,000 microns thickness was greater than 15%. Similarly, based on the visual inspection of fig. 11-12, the zinc weight percent change between the surface of the prior art direct chill cast product and the prior art continuous cast product and a depth of 3,000 microns thickness was greater than 15%.
As shown in fig. 3-10 and the table above, the inventors surprisingly found that the zinc weight percent variation between the surface and the thickness center of samples 1 to 8 according to the invention was less than 15%. Furthermore, based on the visual inspection of fig. 11-12, the zinc weight percent variation between the surface and thickness center of the prior art direct chill cast product and the prior art continuous cast product was greater than 15%.
The weight percentages of zinc, magnesium and copper across the grains from the surface of sample 6 to a depth of 200 microns thickness were determined using the "microsegregation" procedure detailed herein. The data is presented in fig. 13. For comparison, the weight percentages of zinc, magnesium, and copper across grains for the entire thickness of prior art direct chill cast products are depicted in fig. 14. As shown in fig. 13, the inventors surprisingly found that the weight percentages of the main alloying elements Zn, cu and Mg within the matrix have substantially a cross-grain uniformity with increasing weight percentages of the alloying elements at the second phase grain locations at the grain boundaries and within the grains.
Fig. 15 depicts the structure of sample 6. The structure of aluminum alloy samples having average zinc contents of 16% and 25% cast at 55 ft/min using the apparatus detailed in U.S. Pat. No. 6,672,368 is depicted in FIGS. 16 and 17, respectively. Fig. 15 to 17 depict the product of the invention having a spherical grain structure and being substantially free of microsegregation. In addition, as illustrated in fig. 15-17, the product of the present invention may be substantially dendrite-free and consist essentially of spherical non-dendritic grains (i.e., spherical grain structure). In addition, the product is substantially free of micro-segregation effects, as shown by the absence of shadows within the grains (when the sample is viewed with polarized light) according to fig. 15-17.
While various embodiments of the present invention have been described, it is to be understood that these embodiments are illustrative only and not limiting, and that various modifications may be apparent to those skilled in the art. Still further, the steps may be performed in any desired order (and any desired steps may be added and/or any desired steps may be excluded).
Claims (18)
1. A method, comprising
The 7xxx aluminum alloy is continuously cast as a 7xxx aluminum alloy strip,
wherein the 7xxx aluminum alloy strip includes:
(i) 4 to 28wt.% zinc;
(ii) 1 to 3wt.% magnesium; and
(iii) Up to 3wt.% copper;
wherein the 7xxx aluminum alloy strip includes a spheroidal grain structure;
wherein the weight percent of zinc varies by 15% or less between a surface of the 7xxx aluminum alloy strip and a specified depth from the surface;
wherein the specified depth is 3000 microns;
wherein the change in zinc in percent is calculated as:
(maximum weight percent of zinc across the specified depth-minimum weight percent of zinc across the specified depth)/(average weight percent of zinc across the specified depth) ×100.
2. The method of claim 1, wherein the 7xxx aluminum alloy strip has a thickness of from 0.006 inch to 0.400 inch.
3. The method of claim 1, wherein continuously casting the 7xxx aluminum alloy into the 7xxx aluminum alloy strip includes continuously casting at a speed of 25 to 500 feet per minute.
4. The method of claim 1, wherein continuously casting the 7xxx aluminum alloy into the 7xxx aluminum alloy strip includes continuously casting at a speed of 40 to 500 feet per minute.
5. The method of claim 1, wherein continuously casting the 7xxx aluminum alloy into the 7xxx aluminum alloy strip includes continuously casting at a speed of 55 to 85 feet per minute.
6. The method of claim 1, wherein the 7xxx aluminum alloy strip includes from 6wt.% to 28wt.% zinc.
7. The method of claim 1, wherein the 7xxx aluminum alloy strip includes from 8wt.% to 28wt.% zinc.
8. The method of claim 1, wherein the 7xxx aluminum alloy strip includes from 10wt.% to 28wt.% zinc.
9. The method of claim 1, wherein the 7xxx aluminum alloy strip includes from 4wt.% to 15wt.% zinc.
10. The method of claim 1, wherein the 7xxx aluminum alloy strip includes from 6wt.% to 12wt.% zinc.
11. The method of claim 1, wherein the 7xxx aluminum alloy strip includes from 4wt.% to 10wt.% zinc.
12. The method of claim 1, wherein the 7xxx aluminum alloy strip includes from 4wt.% to 8wt.% zinc.
13. The method of claim 1, wherein the 7xxx aluminum alloy strip is substantially free of both microsegregation and dendrites.
14. The method of claim 1, wherein continuously casting the 7xxx aluminum alloy into the 7xxx aluminum alloy strip comprises:
providing a pair of rollers defining a nip therebetween;
delivering a molten 7xxx aluminum alloy to the roll;
rotating the rolls to advance the molten 7xxx aluminum alloy toward the nip;
solidifying the molten 7xxx aluminum alloy to produce a solid outer region of the 7xxx aluminum alloy adjacent to each roller and a semi-solid central region of the 7xxx aluminum alloy located between the solid outer regions;
advancing the solid outer region and the semi-solid central region into the nip; and
solidifying the semi-solid central region within the nip to produce a solid aluminum alloy strip comprising the central region and the outer region.
15. The method of any one of claims 1-14, wherein the change in weight percent of the zinc is 12% or less.
16. The method of any one of claims 1-14, wherein the change in weight percent of the zinc is 10% or less.
17. The method of any one of claims 1-14, wherein the change in weight percent of the zinc is 8% or less.
18. A 7xxx aluminum alloy strip produced by the method of any of claims 1-14.
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| US201662437489P | 2016-12-21 | 2016-12-21 | |
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| CN201711392451.4A CN108220717A (en) | 2016-12-21 | 2017-12-21 | High zinc aluminium alloy product |
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| CN201711392451.4A Division CN108220717A (en) | 2016-12-21 | 2017-12-21 | High zinc aluminium alloy product |
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| CN202311545028.9A Pending CN117568678A (en) | 2016-12-21 | 2017-12-21 | High zinc aluminum alloy product |
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| EP4119686A1 (en) | 2017-12-21 | 2023-01-18 | Novelis, Inc. | Aluminum alloy products exhibiting improved bond durability and/or having phosphorus-containing surfaces and methods of making the same |
| CN113438993A (en) | 2019-02-13 | 2021-09-24 | 诺维尔里斯公司 | Cast metal product with high grain roundness |
| CN111549266B (en) * | 2020-05-27 | 2021-06-25 | 北京科技大学 | Tissue regulation and control method for improving forming performance of aluminum alloy plate of vehicle body structure |
| CN113122759A (en) * | 2021-03-29 | 2021-07-16 | 烟台南山学院 | Creep-resistant high-temperature-resistant cast aluminum alloy and manufacturing method thereof |
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| US5135713A (en) * | 1984-03-29 | 1992-08-04 | Aluminum Company Of America | Aluminum-lithium alloys having high zinc |
| CN1489637A (en) * | 2000-12-21 | 2004-04-14 | �Ƹ��� | Aluminum alloy products and artificial aging method |
| US6672368B2 (en) * | 2001-02-20 | 2004-01-06 | Alcoa Inc. | Continuous casting of aluminum |
| AU2002245705A1 (en) * | 2001-03-20 | 2002-10-03 | Alcoa Inc. | Method for aging 7000 series aluminium |
| US20050269000A1 (en) * | 2001-03-20 | 2005-12-08 | Denzer Diana K | Method for increasing the strength and/or corrosion resistance of 7000 Series AI aerospace alloy products |
| FR2879217B1 (en) * | 2004-12-13 | 2007-01-19 | Pechiney Rhenalu Sa | STRONG ALLOY SHEETS AI-ZN-CU-MG WITH LOW INTERNAL CONSTRAINTS |
| CA2810250A1 (en) * | 2010-09-08 | 2012-03-15 | Alcoa Inc. | Improved aluminum-lithium alloys, and methods for producing the same |
| KR101511632B1 (en) * | 2013-09-05 | 2015-04-13 | 한국기계연구원 | Method for manufacturing of Al-Zn alloy sheet using twin roll casting and Al-Zn alloy sheet thereby |
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| KR20230037064A (en) | 2023-03-15 |
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| CA3036082C (en) | 2022-07-26 |
| JP2019534944A (en) | 2019-12-05 |
| US20180171440A1 (en) | 2018-06-21 |
| CN108220717A (en) | 2018-06-29 |
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