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US3881883A - Clad composites and aluminous metal compositions for cladding - Google Patents

Clad composites and aluminous metal compositions for cladding Download PDF

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US3881883A
US3881883A US416694A US41669473A US3881883A US 3881883 A US3881883 A US 3881883A US 416694 A US416694 A US 416694A US 41669473 A US41669473 A US 41669473A US 3881883 A US3881883 A US 3881883A
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aluminum
cladding
alloy
magnesium
core
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US416694A
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Thomas L Fritzlen
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Reynolds Metals Co
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Reynolds Metals Co
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    • 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
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
    • B32B15/016—Layered products comprising a layer of metal all layers being exclusively metallic all layers being formed of aluminium or aluminium alloys
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12736—Al-base component
    • Y10T428/12764—Next to Al-base component

Definitions

  • the invention relates to aluminous metal cladding materials and composite articles; and. more particu larly. to a heabtreatable clad composite having a core composed of an aluminum base alloy containing zinc. magnesium and copper. and a cladding composed of a compositionally similar alloy containing little or no copper.
  • cladding materials for protecting base metals from corrosion. and for other purposes. Included in this category are alclad products in which the cladding consists essentially of aluminum or aluminum alloyed with a small percentage of zinc.
  • Various aluminum base alloys have been so clad. including 7000 series alloys (Aluminum Association designation) which contain Zinc as the principal alloy addition. as well as magnesium and copper in some instances. in lesser amounts.
  • lt is also known in the art to clad other than aluminum-zinc alloys with a cladding which contains both zinc and magnesium alloyed with aluminum.
  • ()ne of the disadvantages of conventional cladding materials is their dissimilarity to aluminum-zinc-magnesiuni-copper alloys in response to heat treatment. Pure aluminum and conventional cladding composed of aluminum alloyed only with zinc do not respond to solution or precipitation heat treatment.
  • a noteworthy advantage of the present invention is the provision of a composite metal article that is entirely heattreatable. and in which the cladding and core alloys are responsive to a common solution heat treatment and precipi tation hardening practice.
  • a clad composite which includes a cladding layer composed of an aluminumbase magnesium containing about 4 to 5.55? zinc. about 1 to lb /r magnesium and substantially no copper. with a solution potential close to l volt.
  • the core alloy may be any aluminum-zincmagnesiunvcoppcr alloy having an electrode potential less clectro-negativc than the cladding. preferably by at least about 0. l0 volts in order to assure adequate protection of the core.
  • Suitable core alloys include 7001. X7002. 7075. 7079 and 7l78. Such alloys generally contain up to about 8'? vine. 4'; mangcsium and 3"? copper. ordinarily with less copper than magnesium and less magnesium than IlllL.
  • a preferred cladding alloy is one which consists cssentially ol-l 1-4.8; 7inc. l.0l.-$'; magnesium. about 0. l().30'1' manganese. about .05-.20'r' chromium. and not more than .05; copper. balance substantially aluminum.
  • the cladding may contain up to about 020); silicon and 0.25% iron. typically introduced as incidental impurities in the aluminum.
  • the combination of cladding and core alloys according to the invention produces the additional advantage of superior stress corrosion resistance compared to either the cladding alloy itself or a composite of the same core alloy clad with an alloy of aluminum and a small percentage of line.
  • a further improvement exhibited by such clad composites is a substantial increase in the endurance limit for fatigue purposes as shown in the accompanying drawings. The results presented in graphical form in the drawings are based on tests described in Example ill.
  • EXAMPLE I A l2 X 45 inch ingot was produced from an alumi- The ingot was homogenized 24 hours at 915--)-l0 F.. and hot rolled to 0.330 inch thickness. A scalped and homogenized ingot of 7079 alloy was clad with the 0.330 inch stock of alloy A by slabbing to 3% inches. reheating to about 840 F.. rolling to 0.125 inches. annealing. and cold rolling to final thickness. to produce .085-inch thick sheet having a nominal 2 /47: cladding.
  • alclad 7079 having the same core composition and a nominal 47: cladding of 7072 alloy
  • EXAMPLE ll Following generally the procedure of Example I. additional clad sheets were produced in thicknesses of .063 inch (nominal 29 27: cladding), 0.l inch (nomiand 250 F. for 24 hours. Flesural fatigue and axial tension fatigue specimens were prepared from the thus heat-treated (-Tfi) materials. the configuration of the fatigue specimens being shown in FIGS. I and 3 of the 5 accompanying drawings. In the drawings. the designation M0811 is employed to denote the products having a cladding layer in accordance with the invention.
  • the axial fatigue tests were done on an Amsler ⁇ ibrophore operated at a frequency of approximately l H) cycles per second.
  • the flesural fatigue tests were done on Krouse machines at a frequency of 1.725 cycles per minute. with each specimen loaded as a cantilever beam.
  • vvcll as comparison sheets of conventional 7072-clad alloy 7079 also .063 inch thick. were heat treated at 8258-l0 F. for about 7 M minutes. quenched in water F. ma ⁇ . and aged in two steps consecutively at about 200 l. for 8 hours said core alloy consisting essentially ol aluminum. (mil-8.0% zinc. Zia-3.4% magnesium, l.b-2.n/r copper and dill-0.35% chromium.
  • An article comprising a clad composite having a core of aluminum alloy X7002. and a cladding composed of an alloy consisting essentially of aluminum. about 4-5.5'k zinc and about l-l.h/i magnesium. by weight; said core alloy consisting essentially of aluminum. 3.04.07: zinc. Ell-3.0% magnesium. (LSll-llll copper. .(lS-(LfllV/r manganese and (LID-0.309% chromium.
  • An article comprising a clad composite having a core of aluminum alloy 7075. and a cladding composed of an alloy consisting essentially of aluminum. about 4-5.5'7: zinc and about 1-! .67! magnesium. by weight; said core alloy consisting essentially of aluminum. 5.1-6.171 zine. 21-25% magnesium. LIZ-2.0% copper lll and t). l 8-0.3.W chromium.
  • An article comprising a clad composite having a core of aluminum alloy 7079. and a cladding composed of an alloy consisting essentially of aluminum. about 4-5.5: zinc and about l-l.6/r magnesium. by weight: said core alloy consisting essentially of aluminum. 3.8-4.87? zinc. 2.94.794 magnesium. 0.40-0.864 copper. 0.10-0.3071 manganese and (HO-0.25% chromium.
  • An article comprising a clad composite having a core of aluminum alloy 7 l 78. and a cladding composed of an alloy consisting essentially of aluminum. about 4-55: zinc and about 14.6% magnesium. by weight; said core alloy consisting essentially of aluminum. 6.3-7.3'7' zinc. 2.4-3.171 magnesium. iii-2.4% copper and OAS-0.35% chromium.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Laminated Bodies (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)

Abstract

Composite articles having a core and cladding composed of heattreatable aluminum base alloys, in particular a core alloy containing zinc, magnesium and copper as the principal alloying elements, clad with an alloy containing about 4-5.5% zinc and about 1-1.6% magnesium; and improved cladding alloys of that type.

Description

United States Patent Fritzlen *May 6, 1975 CLAD COMPOSITES AND ALUMINOUS [58] Field of Search 29/1975 METAL COMPOSITIONS FOR CLADDING [75] inventor: Thomas L. Fritzlen, Richmond, Va. [56] UNITE SZ ETEZS SZiENTS Assign: Rfiygmlds 3 3.290.129 12/1966 Nock o 29 1915 3,342,565 9/]967 Mundaym. 29/1975 1 N i The portion of he term of this 3,400.450 9/l968 Nock I l l l 29/]975 patent subsequent to Dec 24. 1985 3,418,090 l2/l968 Fritzlen 29/1975 h b l d.
as een dlsc mme Primary Examiner-L. Dewayne Rutledge [22] Filed: Nov. 16, 1973 Assistant ExaminerArthur J. Steiner Attorne A em or FirmGlenn Palmer L ne & A N 6 4 8 i y [2|] ppl 0 41 ,69 Gibbs Related U.S. Application Data [60] Division ofSer. No. 148.368. June 1, I971. Pm. N0. ABSTRACT 3324-083 which is a continuation of F- Composite articles having a core and cladding com- -9' abandoned whch posed of heat-treatable aluminum base alloys, in parg g g if? 8 3 F 2 ticular a core alloy containing zinc, magnesium and Z a copper as the principal alloying elements, clad with an alloy containing about 4-5.5% zinc and about l-l.6% 52] U S 29,1975 magnesium; and improved cladding alloys of that type. [5 I] Int. Cl B32b 15/00 5 Claims, 4 Drawing Figures PATENTEU HAY 61975 SHEET 10F 2 LCNGTTUDINAL M086 CLAO 7072 CLAD I 0 T P I c 5 E D H E R C E P S D 6 Z I MIR IHUII STRESS RAXIHUM STRESS CYCLES T0 FAILURE FIG.
FLEXURAL FATIGUE 0F 0.063" 7079 ALLOY SHEET GLAD U l TH 7072 AND M086 ALLOYS m E s m T M986 0 LAD Zil 3; one
"I! IMLIH STRESS MAX INUM STIE CYCLES T0 FAILURE FLEXURAL FATIGUE 0? 0.083" 7079 ALLOY SHEET CLAD H TH 7072 AND M086 ALLOYS PF IIENIEU 5575 3,881 ,883
SIIEEI 20F 2 LONGITUDINAL /I.75' RADIUS 7072 GLAD N086 OLHJ W 35 n 175ml G SPECINEII DESCRIPTION 16 U7 I- 25 (II I D E X NIIINUM TRESS MAXIMUM STRESS 1o Fl 6 3 CYCLES TO FAILURE 107 10 AX I AL TENSION FATIGUE OF 0.063" 7079 ALLOY SHEET CLAD WITH 7072 AND M086 ALLOYS TRANSVERSE 7072 GLAD DB6 CLAD MAX I MUM STRESS. I000 PSI Nlllllllll ETIZSS IAXIIIUI STIEQS 105 0 CYCLES TO FAILURE 107 M I M TENSION FATIGUE DF 0.063" 7079 ALLOY SHEET CLAD II ITH 7072 AND M086 ALLOYS CLAD COMPOSITES AND ALL'MINOIS METAL COMPOSITIONS FOR (LADDING This application is a division of Ser. No. 148.868 tiled June l. l97l (now US. Pat. No. 3.824.083). which is a continuation of Ser. No. 838.0l 3 filed June 17. I969. which in turn is a continuation of Ser. No. (109.707 filed Dec. 23. I966. both now abandoned. which is in turn a continuation-in-part of Ser. No. 538.085 (now l..'.S. Pat. No. 3.4l8.090) filed Mar. l4. Who.
The invention relates to aluminous metal cladding materials and composite articles; and. more particu larly. to a heabtreatable clad composite having a core composed of an aluminum base alloy containing zinc. magnesium and copper. and a cladding composed of a compositionally similar alloy containing little or no copper.
It is conventional in the art to employ cladding materials for protecting base metals from corrosion. and for other purposes. Included in this category are alclad products in which the cladding consists essentially of aluminum or aluminum alloyed with a small percentage of zinc. Various aluminum base alloys have been so clad. including 7000 series alloys (Aluminum Association designation) which contain Zinc as the principal alloy addition. as well as magnesium and copper in some instances. in lesser amounts. lt is also known in the art to clad other than aluminum-zinc alloys with a cladding which contains both zinc and magnesium alloyed with aluminum.
While the aluminum-zinc-magnesium-copper alloys exhibit relatively high mechanical properties. particularly after heat treatment. they are susceptible in many instances to various types of corrosion. and it has long been a problem facing the art to devise effective means of assuring protection against corrosion. while maintaining the desirable strength characteristics of composite articles having a core composed of such an alloy. ()ne of the disadvantages of conventional cladding materials is their dissimilarity to aluminum-zinc-magnesiuni-copper alloys in response to heat treatment. Pure aluminum and conventional cladding composed of aluminum alloyed only with zinc do not respond to solution or precipitation heat treatment. A noteworthy advantage of the present invention is the provision of a composite metal article that is entirely heattreatable. and in which the cladding and core alloys are responsive to a common solution heat treatment and precipi tation hardening practice.
In accordance with the invention. a clad composite is provided which includes a cladding layer composed of an aluminumbase magnesium containing about 4 to 5.55? zinc. about 1 to lb /r magnesium and substantially no copper. with a solution potential close to l volt. The core alloy may be any aluminum-zincmagnesiunvcoppcr alloy having an electrode potential less clectro-negativc than the cladding. preferably by at least about 0. l0 volts in order to assure adequate protection of the core. Suitable core alloys include 7001. X7002. 7075. 7079 and 7l78. Such alloys generally contain up to about 8'? vine. 4'; mangcsium and 3"? copper. ordinarily with less copper than magnesium and less magnesium than IlllL.
A preferred cladding alloy is one which consists cssentially ol-l 1-4.8; 7inc. l.0l.-$'; magnesium. about 0. l().30'1' manganese. about .05-.20'r' chromium. and not more than .05; copper. balance substantially aluminum. The cladding may contain up to about 020); silicon and 0.25% iron. typically introduced as incidental impurities in the aluminum.
The combination of cladding and core alloys according to the invention produces the additional advantage of superior stress corrosion resistance compared to either the cladding alloy itself or a composite of the same core alloy clad with an alloy of aluminum and a small percentage of line. A further improvement exhibited by such clad composites is a substantial increase in the endurance limit for fatigue purposes as shown in the accompanying drawings. The results presented in graphical form in the drawings are based on tests described in Example ill.
The following examples are illustrative of the invention. but are not to be regarded as limiting.
EXAMPLE I A l2 X 45 inch ingot was produced from an alumi- The ingot was homogenized 24 hours at 915--)-l0 F.. and hot rolled to 0.330 inch thickness. A scalped and homogenized ingot of 7079 alloy was clad with the 0.330 inch stock of alloy A by slabbing to 3% inches. reheating to about 840 F.. rolling to 0.125 inches. annealing. and cold rolling to final thickness. to produce .085-inch thick sheet having a nominal 2 /47: cladding.
Additional specimens of alclad 7079 (having the same core composition and a nominal 47: cladding of 7072 alloy) were provided for purposes of comparison.
The aforesaid clad products in heat treated (-Tb) condition were found to have the following characteristics:
A. Solution Potentials (l-adding: 0.9-t volts Cladding: H198 \olts ('ore: -0.85 volts .JOllensured against a 0 ll\ talomel electrode In LON Nafl (I 3'; H4);- electrolyte B. Mechanical Properties C. Stress Corrosion Specimens cut in the long transverse direction from each of the sheet materials were subjected to an alternate immersion test [0 minutes each hour in 3 /2"? NaCl solution) under a constant load of 75"; of the yield strength. and the results were as follows:
Exposed Stress Material Le\el (lv'siI lime to l'ailure Alclad (Al-l' i Zn) 44.2 4 il l 7) days (lad (Alloy A) 50.0 No failures 7079-Th at 90 days Alloy A-Tn 41s 5043 57 D. General Corrosion The material clad with alloy A also exhibited good corrosion resistance when totally immersed in Richmond tap water. when exposed for 96 hours in 5)? NaCl spray. and when exposed to the -hour CASS (CST.
EXAMPLE ll Following generally the procedure of Example I. additional clad sheets were produced in thicknesses of .063 inch (nominal 29 27: cladding), 0.l inch (nomiand 250 F. for 24 hours. Flesural fatigue and axial tension fatigue specimens were prepared from the thus heat-treated (-Tfi) materials. the configuration of the fatigue specimens being shown in FIGS. I and 3 of the 5 accompanying drawings. In the drawings. the designation M0811 is employed to denote the products having a cladding layer in accordance with the invention.
Both longitudinal and transverse specimens were tested in each case. Prior to testing. the specimens were deburred and edges smoothed with 600 grit emery paper.
The axial fatigue tests were done on an Amsler \ibrophore operated at a frequency of approximately l H) cycles per second.
The flesural fatigue tests were done on Krouse machines at a frequency of 1.725 cycles per minute. with each specimen loaded as a cantilever beam.
The results of the flexural fatigue tests are displayed graphically in the drawings. where it can be seen (FIG. I) that the endurance limit at 10.000000 cycles. with a minimum-to-maximum stress ratio ofminus one (R l) was about lfi.000 psi (longitudinal) for the products of the invention. compared to only about 8.000 psi for the conventional material under the same test con- 7 i nal Hi9? claddinghmd 0.188 inchinominal lVf/r claddltions; and (FIG. 2) about l2.000 psi (transverse). ding). using the following aluminum alloy combinacompared to somewhat less than 8,000 psi. tions containing the indicated additional elements: The corresponding axial fatigue data for l0.000.000
Others Cu Fe Si Mn Mg Zn (r Ti each total .06] Gauge ingot .64 .IS .ll .20 3.49 4117 .l5 .05 .05 max l).l5 ma\ Liner .112 .12 .06 .21) 1.24 4.43 .111 .03 do. do. (H25 (iauge lt'tgttl .h4 14 .(19 .l) 3.6] 4.h7 .ll 05 do do Liner .02 .12 .0h .20 L24 4.43 .10 .03 do. do. (H88 (iauge lngot .69 .l4 .l0 .2l 3.39 4.57 .lo .05 do do. Liner .02 12 .06 .20 1.19 4.4: .11 113 do. do
Specimens of each have completed more than H7 days without stress corrosion failure. under test conditions described in Example I. Results with respect to solution potential and mechanical properties are given below:
A. Solution Potentials cycles (and R 0) were about 25.000 psi (longitudinal) and about 20.000 psi (transverse). compared to about 15.000 psi (both longitudinal and transverse) for the conventional material. These data are shown graph g ically in FIGS. 3 and 4.
Cladding Core .003 Gauge l.0l volts -0.lt8 \olts (H25 ll )9 volts ().88 volts 0188 l.0() volts 0.X7 volts B. Mechanical Properties T.S. (Ksi) Y.S. (Ks-i) Hongl'i) .063 (iau t- 79.4 671) 12.x 0125 80.0 l H 3 (LIXK 79.8 68.] 120 EXAMPLE lll Additional samples from the same lot as the .063 gauge clad sheets of Example ll (having the same ingot and liner compositions). as vvcll as comparison sheets of conventional 7072-clad alloy 7079 also .063 inch thick. were heat treated at 8258-l0 F. for about 7 M minutes. quenched in water F. ma\. and aged in two steps consecutively at about 200 l. for 8 hours said core alloy consisting essentially ol aluminum. (mil-8.0% zinc. Zia-3.4% magnesium, l.b-2.n/r copper and dill-0.35% chromium.
2. An article comprising a clad composite having a core of aluminum alloy X7002. and a cladding composed of an alloy consisting essentially of aluminum. about 4-5.5'k zinc and about l-l.h/i magnesium. by weight; said core alloy consisting essentially of aluminum. 3.04.07: zinc. Ell-3.0% magnesium. (LSll-llll copper. .(lS-(LfllV/r manganese and (LID-0.309% chromium.
3. An article comprising a clad composite having a core of aluminum alloy 7075. and a cladding composed of an alloy consisting essentially of aluminum. about 4-5.5'7: zinc and about 1-! .67! magnesium. by weight; said core alloy consisting essentially of aluminum. 5.1-6.171 zine. 21-25% magnesium. LIZ-2.0% copper lll and t). l 8-0.3.W chromium.
4. An article comprising a clad composite having a core of aluminum alloy 7079. and a cladding composed of an alloy consisting essentially of aluminum. about 4-5.5: zinc and about l-l.6/r magnesium. by weight: said core alloy consisting essentially of aluminum. 3.8-4.87? zinc. 2.94.794 magnesium. 0.40-0.864 copper. 0.10-0.3071 manganese and (HO-0.25% chromium.
5. An article comprising a clad composite having a core of aluminum alloy 7 l 78. and a cladding composed of an alloy consisting essentially of aluminum. about 4-55: zinc and about 14.6% magnesium. by weight; said core alloy consisting essentially of aluminum. 6.3-7.3'7' zinc. 2.4-3.171 magnesium. iii-2.4% copper and OAS-0.35% chromium.

Claims (5)

1. AN ARTICLE COMPRISING A CLAD COMPOSITE HAVING A CORE OF ALUMINUM ALLOY 7001, AND A CLADDING COMPOSED OF AN ALLOY CONSISTING ESSENTIALLY OF ALUMINUM, ABOUT 4-5.5% ZINC AND AOUT 1-1.6% MAGNESIUM, BY WEIGHT, SAID CORE ALLOY CONSISTING ESSENTIALLY OF ALUMINUM, 6.8-8.0% ZINC, 2.6-3.4% MAGNESIUM, 2.6-2.6% COPPER AND 0.18-0.35% CHROMIUM.
2. An article comprising a clad composite having a core of aluminum alloy X7002, and a cladding composed of an alloy consisting essentially of aluminum, about 4-5.5% zinc and about 1-1.6% magnesium, by weight; said core alloy consisting essentially of aluminum, 3.0-4.0% zinc, 2.0-3.0% magnesium, 0.50-1.0% copper, .05-0.30% manganese and 0.10-0.30% chromium.
3. An article comprising a clad composite having a core of aluminum alloy 7075, and a cladding composed of an alloy consisting essentially of aluminum, about 4-5.5% zinc and about 1-1.6% magnesium, by weight; said core alloy consisting essentially of aluminum, 5.1-6.1% zinc, 2.1-2.5% magnesium, 1.2-2.0% copper and 0.18-0.35% chromium.
4. An article comprising a clad composite having a core of aluminum alloy 7079, and a cladding composed of an alloy consisting essentially of aluminum, about 4-5.5% zinc and about 1-1.6% magnesium, by weight; said core alloy consisting essentially of aluminum, 3.8-4.8% zinc, 2.9-3.7% magnesium, 0.40-0.8% copper, 0.10-0.30% manganese and 0.10-0.25% chromium.
5. An article comprising a clad composite having a core of aluminum alloy 7178, and a cladding composed of an alloy consisting essentially of aluminum, about 4-5.5% zinc and about 1-1.6% magnesium, by weight; said core alloy consisting essentially of aluminum, 6.3-7.3% zinc, 2.4-3.1% magnesium, 1.6-2.4% copper and 0.18-0.35% chromium.
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3973921A (en) * 1974-03-18 1976-08-10 Reynolds Metals Company Non-detachable tab stock
EP0066009A2 (en) * 1981-04-15 1982-12-08 ALLUMINIO ITALIA S.p.A. Aluminium alloys composite plates
US4722872A (en) * 1986-04-28 1988-02-02 Kaiser Aluminum & Chemical Corporation Clad magnetic memory disk substrate
US5939164A (en) * 1996-02-28 1999-08-17 The Furukawa Electric Co., Ltd. Aluminum alloy sheet for magnetic disk substrate aluminum alloy clad sheet for magnetic disk substrate and their manufacturing method
WO1999061242A1 (en) * 1998-05-26 1999-12-02 Aluminium Ranshofen Walzwerk Gesellschaft Mbh Method for producing bright light-metal composite plates, especially plates for the aviation industry
EP1221366A1 (en) * 2000-12-29 2002-07-10 Alcoa Inc. A cladded structure intregrally in aluminium with the liner inset into a grooved ingot
EP1849542A1 (en) * 2006-04-25 2007-10-31 Hydro Aluminium Deutschland GmbH High-mirror-finished strip by clad rolling
US20110108608A1 (en) * 1999-06-30 2011-05-12 Kaestner Stefan Method for producing an aluminum composite material
CN111593239A (en) * 2020-05-27 2020-08-28 北京科技大学 Low-cost and high-formability aluminum alloy sheet for vehicle body structure and preparation method thereof

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Publication number Priority date Publication date Assignee Title
US3290129A (en) * 1965-11-10 1966-12-06 Aluminum Co Of America Ferrous sheet faced with aluminum
US3342565A (en) * 1961-12-18 1967-09-19 British Aluminium Co Ltd Aluminium base clad with a magnesiumsilicon-aluminium alloy
US3400450A (en) * 1965-11-10 1968-09-10 Aluminum Co Of America Method of forming ferrous sheet faced with aluminum
US3418090A (en) * 1966-03-14 1968-12-24 Reynolds Metals Co Composite aluminum article

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3342565A (en) * 1961-12-18 1967-09-19 British Aluminium Co Ltd Aluminium base clad with a magnesiumsilicon-aluminium alloy
US3290129A (en) * 1965-11-10 1966-12-06 Aluminum Co Of America Ferrous sheet faced with aluminum
US3400450A (en) * 1965-11-10 1968-09-10 Aluminum Co Of America Method of forming ferrous sheet faced with aluminum
US3418090A (en) * 1966-03-14 1968-12-24 Reynolds Metals Co Composite aluminum article

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3973921A (en) * 1974-03-18 1976-08-10 Reynolds Metals Company Non-detachable tab stock
EP0066009A2 (en) * 1981-04-15 1982-12-08 ALLUMINIO ITALIA S.p.A. Aluminium alloys composite plates
EP0066009A3 (en) * 1981-04-15 1983-02-16 Alluminio Italia S.P.A. Aluminium alloys composite plates
US4426429A (en) 1981-04-15 1984-01-17 Alluminio Italia S.P.A. Aluminium alloys composite plates
US4722872A (en) * 1986-04-28 1988-02-02 Kaiser Aluminum & Chemical Corporation Clad magnetic memory disk substrate
US5939164A (en) * 1996-02-28 1999-08-17 The Furukawa Electric Co., Ltd. Aluminum alloy sheet for magnetic disk substrate aluminum alloy clad sheet for magnetic disk substrate and their manufacturing method
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