US3642542A - A process for preparing aluminum base alloys - Google Patents

A process for preparing aluminum base alloys Download PDF

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Publication number
US3642542A
US3642542A US14189A US3642542DA US3642542A US 3642542 A US3642542 A US 3642542A US 14189 A US14189 A US 14189A US 3642542D A US3642542D A US 3642542DA US 3642542 A US3642542 A US 3642542A
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percent
alloy
process according
hot working
temperature
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US14189A
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Philip R Sperry
Damian V Gullotti
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Olin Corp
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Olin Corp
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    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22FCHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • C22F1/05Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys of the Al-Si-Mg type, i.e. containing silicon and magnesium in approximately equal proportions
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C21/00Alloys based on aluminium
    • C22C21/06Alloys based on aluminium with magnesium as the next major constituent
    • C22C21/08Alloys based on aluminium with magnesium as the next major constituent with silicon

Definitions

  • ABSTRACT U.S. A process for preparing aluminum base alloys containing 5. 75/146, 75/147, 148/325 icon and magnesium comprising the steps of hot working, [5 Cl- ..C22f quenching and aging and to improved hot.worked aluminum- [58] Field of Search ..75/ 146, 147, 141, 142; based ll h i high-strength and high-impact properties.
  • the present invention relates to a process for obtaining an aluminum base alloy containing silicon and magnesium.
  • the present invention also relates to an improved aluminum base alloy containing silicon and magnesium, wherein said alloy is a hotworked alloy and has high-strength and high-impact properties.
  • Hot-worked aluminum base alloys containing magnesium and silicon find wide application in a wide variety of uses, for example. they may be readily used as extrusions, forgings or rolled products.
  • the improved hot-worked alloy of the present invention consists essentially of silicon from 0.3 to' 1.3 percent, magnesium from 0.3 to 1.5 percent, chromium from 0.03 to 0.40 percent and zirconium from 0.03 to 0.20 percent.
  • the alloy of the present invention also contains manganese in an amount from 0.03 to 0.4 percent.
  • the improved alloy of the present invention is a hot-worked product and has a surprising combination of high-strength and high-impact properties.
  • the microstructure of the alloy of the present invention is characterized by a substantially unrecrystallized grain structure. lt is surprising that the combination of ingredients of the alloy of the present invention achieves such excellent properties and it is further surprising that the substantially unrecrystallized grain structure results in improved impact properties.
  • the process of the present invention comprises: hot working the alloys at a finishing temperature in excess of 850 F.; water quenching the alloysdown to a temperature of 350 F. or below at a cooling rate of from 1,000 to 10,000 F. per minute; and thermally artificially aging the alloys at a temperature from 200 to 410 F. for from 15 minutes to 24 hours.
  • the alloys of the present invention are characterized by a surprising combination of high-strength and high-impact toughness.
  • the minimum properties obtained in accordance with the foregoing process are as follows: tensile strength at least 38,000 p.s.i.; yield strength at 0.2 percent offset at least 35,000 p.s.i. and elongation at least 8 percent.
  • the minimum impact toughness of the alloys of the present invention is for a xi-inch-thiclt specimen the Charpy Notch impact test yields at least 15 foot pounds. One would obtain at least 20 foot-pounds for a 0.394-inch-thick specimen, and typically 30 to 40 foot-pounds.
  • the alloy of the present invention has numerous other highly desirable characteristics, for example, it is easily extruded and has good corrosion resistance.
  • the alloy of the present invention contains from 0.3 to 1.3 percent silicon and preferably from 0.4 to 0.9 percent silicon.
  • the alloy of the present invention contains magnesium in an amount from 0.3 to 1.5 percent and preferably from 0.4 to 1.0 percent.
  • the chromium content may vary from 0.03 to 0.40 percent and preferably from 0.05 to 0.35 percent.
  • the zirconium may vary from 0.03 to 0.20 percent and preferably from 0.05 to 0.15 percent.
  • manganese in an amount from 0.03 to 0.4 percent and preferably in an amount from 0.05 to 0.3 percent.
  • the present invention contemplates conventional impurities common for alloys of this type. This is important since it indicates that the improved properties of the alloys of the present invention are obtainable with normal commercial purity materials.
  • normal impurities include 0.60 percent maximum iron; 0.30 percent maximum copper; 0.50 percent maximum zinc; up to 0.008 percent boron; 0.10 percent maximum each of other elements the total of which is a maximum of 0.50 percent.
  • the manner of melting and casting the alloy is not especially critical and conventional methods of melting and casting may be conveniently employed. It is desirable to uniformly distribute the silicon and magnesium throughout the matrix of the alloy before the process of the present invention is performed, such as by a homogenization heat treatment subsequent to the casting operation. Before or during hot working some high temperature precipitate should be formed due to Cr, Zr and Mn, as this is the mechanism by which recrystallization is inhibited. However, this can be accomplished by reheating for hot working as well as by homogenization.
  • the alloy After casting the alloy is hot worked at a finishing temperature in excess of 850 F. and preferably in excess of 900 F for example, forging, rolling or extruding.
  • inishing temperature it is meant the final temperature at which significant deformation is obtained in the hot-working operation.
  • the die exit temperature should be in excessof 850 F. It is preferable that the actual temperature be high enough to dissolve substantially all Mg and Si which is available for maximum strengthening.
  • the rapid quenching is normally obtained by plunging the material in water or by passing the material through a water spray quench.
  • the material may then be cold worked up to 5 percent, e.g., rolling, stretching, etc.
  • the material should be then artificially aged at a temperature of 200 to 410 F. for 15 minutes to 24 hours.
  • the alloys of the present invention are quench sensitive. It is a particularly surprising finding of the present invention that this quench sensitivity can be controlled with respect to a particularly preferred composition. This is accomplished by a critical adjustment of the quantities of chromium, zirconium and manganese present in the alloy so that each of these materials are present in an amount of 0.03 to 0.2 percent, and the total chromium plus zirconium plus manganese content is from 0.2 to 0.35 percent. It has been found that when the composition has been controlled in this manner, the alloy can be air cooled at a cooling rate from to 1,000 F. per minute; otherwise, the alloy must be water quenched at the more rapid rate specified hereinabove.
  • the air cooling is nonnally achieved by using appropriately placed fans.
  • the hot working step should be performed at a finishing temperature in excess of 900 F. and preferably in excess of 950 F.
  • the alloy of the present invention is a hot-worked product with a surprising combination of highstrength and high-impact properties and with a microstructure characterized by a substantially unrecrystallized grain structure.
  • EXAMPLE 1 lngots were prepared by direct chill (DC) casting in a conventional manner summarized as follows. Melting and alloying e impact test value TABLE II Charpy Section Y.S. Elongation impact thickness Quench UIS (K 5,1.) (percent strength (lnehes) Alloy method (K s.1.) at 0.2% in 2 1n.) (IL-lbs.) 43. 5 41. 10 20. 1% A 4 .1 11 23.2 4 .5 9. 9. 5 .8 54 B 42.5 42. 4 32.3
  • Measured surface temperatures ranged between 975 and 1,025 F. before entering the press. Three extrusion dies were used to produce section thicknesses of one-eighth, one-fourth, and one-half inch. Exit temperatures ranged from 980 to 1,000" F. One extrusion of each thickness was fan cooled as it exited from the press at a cooling rate in the range of the process of the present invention; another was water quenched by passing it through an open ended trough fed by an upward flow of water at both ends at a cooling rate in the range of the process of the present invention. All extrusions were aged at room temperature for about 24 hours, followed by artificial aging at 350 F. for 5 hours. Tensile test specimens and Charpy impact specimens were taken from the extrusions. The and Va-lnCh-thiCk extrusions were tested with reduced ingots were prepared in a conventional manner from two kilogram melts cast by the tilt mold (Durville) process. The resultant compositions are indicated in Table 111 below.
  • EXAMPLE V lngots were prepared in a manner after Example 1 to have the composition indicated in Table V below.
  • Alloy J (Commercial Alloy 6061) silicon 0.64% magnesium 1.10% iron 0.25% copper 0.25% titanium 0.017% chromium 0.18% manganese 0.053%
  • Example V1 The materials from Example V were processed in a manner after Example 1V except that the materials were hot rolled 50 percent in one pass rather than 80 percent and Alloys I and J were aged for 8 hours at 350 F.
  • Table VI The results are given in Table VI below and clearly show the surprising propertiesotiAlloy H not contain the chromium addition which represents the alloy of the present invention. It should be noted that the Charpy impact test utilized standard 0.394 inch specimens.
  • the process for preparing a material having a combination of high-strength and high-impact properties which comprises: providing an aluminum base alloy consisting essentially of from 0.3 to 1.3 percent silicon, 0.3 to 1.5 percent magnesium, 0.03 to 0.4 percent chromium, 0.03 to 0.2 percent zirconium, balance essentially aluminum; hot working said alloy at a finishing temperature in excess of 850 F.; water quenching said alloy to a temperature of at least 350 F. at a cooling rate of from l,000 to 10,000 F. per minute; and thermally artificially aging said alloy at a temperature of from 200 to 410 F. for 15 minutes to 24 hours.
  • the process for preparing a material having a combination of high-strength and high-impact properties which comprises: providing an aluminum base alloy consisting essentially of silicon from 0.3 to 1.3 percent, magnesium from 0.3 to 1.5 percent, chromium from 0.03 to 0.2 percent, zirconium from 0.03 to 0.2 percent, manganese from 0.03 to 0.2 percent, balance essentially aluminum, wherein the total chromium plus zirconium plus manganese content is from 0.2 to 0.35 percent; hot working said alloy at a finishing temperature in excess of 900 F; air cooling said alloy to a temperature of at least 350 F. at a cooling rate of from to l,000 F. per minute; and thermally artificially aging said alloy at a temperature offrom 200 to 410 F. for 15 minutes to 24 hours.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Continuous Casting (AREA)
  • Heat Treatment Of Steel (AREA)
  • Metal Rolling (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Extrusion Of Metal (AREA)
  • Heat Treatment Of Nonferrous Metals Or Alloys (AREA)
US14189A 1970-02-25 1970-02-25 A process for preparing aluminum base alloys Expired - Lifetime US3642542A (en)

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US (1) US3642542A (enrdf_load_stackoverflow)
JP (1) JPS5021283B1 (enrdf_load_stackoverflow)
BE (1) BE763460A (enrdf_load_stackoverflow)
CH (1) CH580166A5 (enrdf_load_stackoverflow)
DE (1) DE2103614B2 (enrdf_load_stackoverflow)
FR (1) FR2078965A5 (enrdf_load_stackoverflow)
GB (3) GB1344249A (enrdf_load_stackoverflow)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3879194A (en) * 1971-05-25 1975-04-22 Alcan Res & Dev Aluminum alloys
US3938991A (en) * 1974-07-15 1976-02-17 Swiss Aluminium Limited Refining recrystallized grain size in aluminum alloys
DE2629838A1 (de) * 1975-07-02 1977-01-27 Kobe Steel Ltd Al-legierungsblech fuer finnen eines waermeaustauschers und verfahren zu seiner herstellung
US4019931A (en) * 1976-03-04 1977-04-26 Swiss Aluminium Ltd. Thread plate process
US4039355A (en) * 1974-03-29 1977-08-02 Riken Light Metal Industries Company, Ltd. Aluminum alloy shapes
US4093474A (en) * 1976-07-09 1978-06-06 Swiss Aluminium Ltd. Method for preparing aluminum alloys possessing improved resistance weldability
US4490189A (en) * 1982-04-13 1984-12-25 Aluminium Pechiney Method of manufacturing stamped-out or forged parts made of aluminum alloys
US4766664A (en) * 1987-02-17 1988-08-30 Alumax Extrusions, Inc. Process for formation of high strength aluminum ladder structures
US5098490A (en) * 1990-10-05 1992-03-24 Shin Huu Super position aluminum alloy can stock manufacturing process
RU2170282C2 (ru) * 1999-07-21 2001-07-10 Открытое акционерное общество "Красноярский металлургический завод" Способ термической обработки алюминиевых сплавов системы алюминий-магний-кремний
US6364969B1 (en) * 1996-07-04 2002-04-02 Malcolm James Couper 6XXX series aluminium alloy
RU2215058C1 (ru) * 2002-02-28 2003-10-27 Закрытое акционерное общество "Промышленный центр "МАТЭКС" Способ производства прессованных изделий из термически упрочняемых алюминиевых сплавов
CN100482828C (zh) * 2007-05-09 2009-04-29 东北轻合金有限责任公司 一种高精度铝合金波导管的制造方法
US20100089503A1 (en) * 2007-03-14 2010-04-15 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) Aluminum alloy forgings and process for production thereof
CN111218591A (zh) * 2020-02-28 2020-06-02 福建祥鑫股份有限公司 一种新能源汽车动力系统用高强韧7xxx铝合金型材的制备方法
EP3981893A1 (de) * 2020-10-07 2022-04-13 AMAG rolling GmbH Platte aus einer gewalzten aluminiumlegierung und herstellung solch einer platte

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2398558A1 (fr) * 1977-07-29 1979-02-23 Cegedur Procede de filage d'alliages d'aluminium a haute resistance
FR2446865A1 (fr) * 1979-01-16 1980-08-14 Pechiney Aluminium Alliage d'aluminium type a-gs a resistance mecanique et tenacite elevees
FR2457328A1 (fr) * 1979-05-25 1980-12-19 Cebal Alliage d'aluminium de type a-gs
JPS58156197A (ja) * 1982-03-10 1983-09-17 Sumitomo Light Metal Ind Ltd 超高圧用プレ−トフイン型熱交換器
DE3243371A1 (de) * 1982-09-13 1984-03-15 Schweizerische Aluminium AG, 3965 Chippis Aluminiumlegierung
JPS59153861A (ja) * 1983-02-22 1984-09-01 Fuji Photo Film Co Ltd 平版印刷版用支持体
US4729939A (en) * 1985-07-25 1988-03-08 Nippon Light Metal Company Limited Aluminum alloy support for lithographic printing plates
JPH0674480B2 (ja) * 1987-09-03 1994-09-21 本田技研工業株式会社 溶接性、耐糸錆性、成形性及び焼付硬化性に優れた成形用及び溶接用A▲l▼合金板及びその製造法
AT394580B (de) * 1989-11-30 1992-05-11 Austria Metall Aktienges Verfahren zur herstellung eines bleches aus einer aluminiumlegierung fuer bauteile
DE10324453B4 (de) * 2002-07-01 2008-06-26 Corus Aluminium N.V. Gewalztes wärmebehandelbares Al-Mg-Si-Legierungsprodukt
WO2007114078A1 (ja) * 2006-03-31 2007-10-11 Kabushiki Kaisha Kobe Seiko Sho アルミニウム合金鍛造部材およびその製造方法
DE102006039684B4 (de) * 2006-08-24 2008-08-07 Audi Ag Aluminium-Sicherheitsbauteil
EP2553131B1 (en) 2010-03-30 2019-05-08 Norsk Hydro ASA High temperature stable aluminium alloy
ES2695698T3 (es) 2012-04-25 2019-01-10 Norsk Hydro As Perfil extruido de aleación de aluminio Al-Mg-Si con propiedades mejoradas

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3113052A (en) * 1960-07-05 1963-12-03 Aluminum Co Of America Method of making aluminum base alloy extruded product
US3234054A (en) * 1964-08-05 1966-02-08 Olin Mathieson Process for preparing aluminum base alloy

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3113052A (en) * 1960-07-05 1963-12-03 Aluminum Co Of America Method of making aluminum base alloy extruded product
US3234054A (en) * 1964-08-05 1966-02-08 Olin Mathieson Process for preparing aluminum base alloy

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3879194A (en) * 1971-05-25 1975-04-22 Alcan Res & Dev Aluminum alloys
US4039355A (en) * 1974-03-29 1977-08-02 Riken Light Metal Industries Company, Ltd. Aluminum alloy shapes
US3938991A (en) * 1974-07-15 1976-02-17 Swiss Aluminium Limited Refining recrystallized grain size in aluminum alloys
DE2629838A1 (de) * 1975-07-02 1977-01-27 Kobe Steel Ltd Al-legierungsblech fuer finnen eines waermeaustauschers und verfahren zu seiner herstellung
US4019931A (en) * 1976-03-04 1977-04-26 Swiss Aluminium Ltd. Thread plate process
US4093474A (en) * 1976-07-09 1978-06-06 Swiss Aluminium Ltd. Method for preparing aluminum alloys possessing improved resistance weldability
US4490189A (en) * 1982-04-13 1984-12-25 Aluminium Pechiney Method of manufacturing stamped-out or forged parts made of aluminum alloys
US4766664A (en) * 1987-02-17 1988-08-30 Alumax Extrusions, Inc. Process for formation of high strength aluminum ladder structures
US5098490A (en) * 1990-10-05 1992-03-24 Shin Huu Super position aluminum alloy can stock manufacturing process
US6364969B1 (en) * 1996-07-04 2002-04-02 Malcolm James Couper 6XXX series aluminium alloy
RU2170282C2 (ru) * 1999-07-21 2001-07-10 Открытое акционерное общество "Красноярский металлургический завод" Способ термической обработки алюминиевых сплавов системы алюминий-магний-кремний
RU2215058C1 (ru) * 2002-02-28 2003-10-27 Закрытое акционерное общество "Промышленный центр "МАТЭКС" Способ производства прессованных изделий из термически упрочняемых алюминиевых сплавов
US20100089503A1 (en) * 2007-03-14 2010-04-15 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) Aluminum alloy forgings and process for production thereof
US8372220B2 (en) * 2007-03-14 2013-02-12 Kobe Steel, Ltd. Aluminum alloy forgings and process for production thereof
CN100482828C (zh) * 2007-05-09 2009-04-29 东北轻合金有限责任公司 一种高精度铝合金波导管的制造方法
CN111218591A (zh) * 2020-02-28 2020-06-02 福建祥鑫股份有限公司 一种新能源汽车动力系统用高强韧7xxx铝合金型材的制备方法
CN111218591B (zh) * 2020-02-28 2020-09-15 福建祥鑫股份有限公司 一种新能源汽车动力系统用高强韧7xxx铝合金型材的制备方法
EP3981893A1 (de) * 2020-10-07 2022-04-13 AMAG rolling GmbH Platte aus einer gewalzten aluminiumlegierung und herstellung solch einer platte
WO2022074153A1 (de) * 2020-10-07 2022-04-14 Amag Rolling Gmbh Platte aus einer gewalzten aluminiumlegierung und ein verfahren zur herstellung dieser platte

Also Published As

Publication number Publication date
CH580166A5 (enrdf_load_stackoverflow) 1976-09-30
GB1344250A (en) 1974-01-16
DE2103614B2 (de) 1975-08-14
JPS5021283B1 (enrdf_load_stackoverflow) 1975-07-22
FR2078965A5 (enrdf_load_stackoverflow) 1971-11-05
BE763460A (fr) 1971-08-25
GB1344248A (en) 1974-01-16
GB1344249A (en) 1974-01-16
DE2103614A1 (de) 1971-09-09

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