US20110048591A1 - Method for heat treating a rolling stock made of a heat-treatable aluminum alloy - Google Patents

Method for heat treating a rolling stock made of a heat-treatable aluminum alloy Download PDF

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Publication number
US20110048591A1
US20110048591A1 US12/736,697 US73669709A US2011048591A1 US 20110048591 A1 US20110048591 A1 US 20110048591A1 US 73669709 A US73669709 A US 73669709A US 2011048591 A1 US2011048591 A1 US 2011048591A1
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United States
Prior art keywords
rolling stock
hot exposure
heating
age
exposure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US12/736,697
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English (en)
Inventor
Josef Schnitzlbaumer
Josef Enser
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Amag Rolling GmbH
Original Assignee
Amag Rolling GmbH
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Filing date
Publication date
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Assigned to AMAG ROLLING GMBH reassignment AMAG ROLLING GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ENSER, JOSEF, SCHNITZLBAUMER, JOSEF
Publication of US20110048591A1 publication Critical patent/US20110048591A1/en
Abandoned legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
    • H02J3/14—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
    • H02J2310/40—The network being an on-board power network, i.e. within a vehicle
    • H02J2310/44—The network being an on-board power network, i.e. within a vehicle for aircrafts
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
    • 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
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems
    • Y04S20/222—Demand response systems, e.g. load shedding, peak shaving

Definitions

  • the invention relates to a method for heat treating a rolling stock, particularly a strip, made of an age-hardenable aluminium alloy, particularly an alloy of the 6000 series, wherein the rolling stock in the process of passing through an apparatus is fed to a solution annealing operation and a quenching operation, and in a subsequent step the rolling stock is subjected to hot exposure for age hardening.
  • the disadvantage in the known methods for hot exposure is that in addition to the comparatively high energy costs which are caused by the comparatively long duration of hot exposure, there are comparatively considerably deviating properties of the material also over the length of the strip. Such process variances in particular do not represent any quality feature of the strip, leading to disadvantages in competition.
  • Stabilization annealing known both from JP2007239005A and EP 1195449A2 is thus to be performed in order to achieve advantages in paint baking or to improve a so-called “paint-bake response” of aluminium sheet. Stabilization annealing does not offer any advantages in hot exposure for hot age-hardening.
  • the invention is therefore based on the object of improving a method for heat treating a rolling stock made of an age-hardenable aluminium alloy or a respective installation on the basis of the initially mentioned state of the art in such a way that it is not only possible to achieve a reduced treatment duration of the rolling stock with constant material properties, but that also the process variance in the heat treatment of the rolling stock remains at a low level.
  • the material properties of the age-hardenable aluminium alloy can be leveled out with respect to its variance at least in sections over the length of the rolling stock. Examinations of the material of age-hardenable aluminium alloys of the 6000 series have shown that the known process variance in the heat treatment of these alloys can be reduced, by means which the invention especially stands out as compared with other known methods.
  • the known negative effects of intermediate storage from quenching to age hardening can advantageously be avoided.
  • the heat or supplied energy from the first step of hot exposure can at least partly be used for further hot exposure.
  • the method in accordance with the invention for age hardening can thus be more efficient and also cost-effective in its entirety in comparison with known methods.
  • a large variety of known temperatures from the state of the art can be used for age hardening, which temperatures can be between 120 and 250 degrees Celsius.
  • Advantageous conditions for the method can be obtained concerning the heating of the passing strip when the rolling stock passes through a heating which occurs over the width of the rolling stock in sections over the length of the rolling stock as a first step of hot exposure, and it is then further subjected to hot exposure either cut to size or coiled into a coil. Moreover, this can enable a rapid heating of a rolling stock, which can lead to advantageous material properties.
  • the rolling stock which is in passage in the apparatus is heated to one of its age-hardening temperatures, preferably 160 degrees Celsius, this can lead to considerable improvements in the material properties of the rolling stock after subsequent age hardening. It is then possible to bring the rolling stock to a state of age-hardening already in the first step, which can improve further age hardening.
  • the rolling stock heated in the first step is further subjected to hot exposure prior to its cooling to a temperature beneath the temperature for hot exposure, especially beneath its lowest age-hardening temperature, it can be ensured that cold aging of the rolling stock cannot occur, which can lead to an advantageous hardness progression during hot exposure.
  • Known temperatures of aluminium alloys are from 120 degrees Celsius for this purpose, so that approx. 120 degrees Celsius can be regarded as the lowest age-hardening temperature during hot exposure.
  • the quenching of the rolling stock is made to less than 200 degrees Celsius, preferably to room temperature, and the heating in the first step of hot exposure is made to 100 to 200 degrees Celsius, which was shown for example in tests with aluminium alloys of the 6000 series.
  • heating in the first step to 160 degrees has proven to be positive for age hardening because this led to a special response in the alloy of the 6000 series.
  • the strength of the aluminium alloy can be improved even further in that the time interval between the end of the quenching and the start of heating of the first step of the hot exposure is less than 60 minutes. Tests with aluminium alloys of the 6000 series led to a considerable increase in the strength by these parameters, wherein it was possible to reduce the time for hot exposure or age hardening to a considerable extent.
  • the object with respect to the installation is achieved by the invention in such a way that the apparatus is associated at least partly with the heating of the device for hot exposure of the rolling stock.
  • the apparatus is associated at least partly with the heating of the device for hot exposure of the rolling stock, it is then possible to provide not only special process conditions but also that the installation can meet compact constructional conditions.
  • Simple constructional conditions are obtained when the heating associated with the apparatus belongs to a continuous furnace, with rolling stock which is in passage through the apparatus passing through said furnace as a first step of hot exposure.
  • the constructional conditions can be improved when the other parts of the device for hot exposure of the rolling stock are arranged separate from the apparatus.
  • the apparatus for heating the rolling stock comprises the entire heating of the device for the hot exposure of the rolling stock to hot exposure temperature, especially age-hardening temperature, with the other part of the device for hot exposure of the rolling stock comprising an insulating chamber which at least partly encompasses the rolling stock for age-hardening the rolling stock, an especially energy-efficient installation for age hardening of a rolling stock can be achieved among other things.
  • the rolling stock is brought rapidly to the temperature for hot exposure, which occurs while still in passage, and is then subsequently further age-hardened in the heated state and without any additional further energy input.
  • advantageous material properties are further enabled with such an installation, as has already been described above.
  • FIG. 1 shows a schematic illustration of an apparatus for performing the method for heat treatment
  • FIG. 2 shows a schematic illustration of a further embodiment of an apparatus for performing the heat treatment
  • FIG. 3 shows an abridged and schematically indicated top view of the part of the device for hot exposure of the rolling stock which is associated with the apparatus according to FIG. 1 or 2 ;
  • FIG. 4 shows an insulating chamber in a partly sectional side view for performing the further steps for hot exposure, and, as an alternative thereto,
  • FIG. 5 shows a heatable bell-type furnace in a partly sectional side view.
  • a rolling stock 3 especially a strip, made of an age-hardenable aluminium alloy is rolled up into a coil 2 , which rolling stock 3 is guided or pulled through a continuous strip furnace 5 via a deflection roller 4 for solution annealing as a first process step.
  • Appropriate temperatures of solution annealing lie between 450 and 570 degrees Celsius.
  • the rolling stock 3 then passes through a quenching apparatus 7 for quenching as a second method step, with which the rolling stock 3 is cooled off, preferably to room temperature.
  • the rolling stock 3 After the cooling of the rolling stock 3 , the rolling stock 3 is rolled up into a coil 8 again via a deflection roller 6 and is subjected to hot exposure as the last method step in the heat treatment for age hardening.
  • the hot exposure temperatures and times must be adjusted to the respective alloy and the application in order to thus achieve the desired properties of the rolling stock 3 .
  • Appropriate temperatures for such hot exposure are between 100 and 200 degrees Celsius for example.
  • the strength of the aluminium alloy can be set for example by means of the parameters of the hot exposure or age hardening. In accordance with the invention however, the first method step of hot exposure is already performed by the apparatus 1 .
  • a device for heating which is a further continuous furnace 10 , is provided between the device 7 for quenching and the coiling device 9 , which furnace 10 heats the cooled rolling stock 3 in sections, which is shown especially in FIG. 3 .
  • the continuous furnace 10 With the help of the continuous furnace 10 , the rolling stock 3 thus already passes through a heating 11 over the width of the rolling stock in sections of the length of the rolling stock while disposed in apparatus 1 .
  • the continuous furnace 10 comprises a heating 12 which can act on the rolling stock 3 inductively, via infrared or with the help of a gas flame.
  • the relevant aspect is that the rolling stock 3 is heated again over the temperature by cooling, which occurs in passage of apparatus 1 .
  • the rolling stock 3 which is in passage in apparatus 1 and has already been cooled off, especially to room temperature, is heated again with the help of the apparatus 1 , whereupon the rolling stock 3 is further subjected to heat exposure either then or in a further step.
  • the rolling stock 3 thus no longer cools off to its temperature before heating, but is further subjected in the heated state of hot exposure to age hardening.
  • the hot exposure has already started by apparatus 1 , which thus not only accelerates the method for heat treatment in its entirety, but also simultaneously ensures an even distribution of strength over the entire length of the rolling stock 3 .
  • An additional factor is that thus higher strength values can be achieved than a rolling stock 3 would show which was produced according to the known method.
  • the rolling stock 3 is further subjected to hot exposure by not being wound up into a coil 8 , but cut to size, e.g. in plates. Coiling of the rolling stock 3 into a coil 8 appears to be advantageous because in this case the heat radiation of the sections thus heated and then coiled will act predominantly in the direction of the interior of the coil.
  • FIG. 2 differs from the apparatus 1 shown in FIG. 1 in such a way that the deflection roller 4 and the deflection roller 6 were replaced by a clamping device 13 and an unclamping device 14 .
  • These devices allow a continuous feed of the apparatus 1 or a continuous passage of the rolling stock 3 made of an age-hardenable aluminium alloy.
  • the devices 13 and 14 are displaceably mounted, so that the apparatus 1 can be supplied with an endless strip.
  • shears 15 and 16 for cutting the endless strip into size are provided.
  • the device for the further hot exposure of the rolling stock 3 can comprise a bell-type furnace 17 , which is shown according to FIG. 5 .
  • the rolling stock 3 can also be partly encompassed by a device for reducing the heat radiation, especially an insulating chamber 18 , which is shown according to FIG. 4 .
  • the other parts of the device for hot exposure of the rolling stock 3 are arranged separate from the apparatus 1 .
  • the insulating chamber 18 comprises an openable door 19 which is movably articulated on the housing 20 , so that upon opening the same the coil 8 to be further exposed to heat can be introduced into the insulating chamber 18 .
  • the insulating chamber 18 is lined in its inner region with a thermal insulation 21 .
  • the advantage over known heatable furnaces such as bell-type furnaces 17 is that the further heat exposure occurs in an insulating chamber 18 exclusively by the sensible heat of the coil 8 , thus reducing operating costs. This requires however that the heating of the rolling stock occurs already at age-hardening temperature in the first step of hot exposure.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Power Engineering (AREA)
  • Metal Rolling (AREA)
  • Winding, Rewinding, Material Storage Devices (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
US12/736,697 2008-05-09 2009-05-11 Method for heat treating a rolling stock made of a heat-treatable aluminum alloy Abandoned US20110048591A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ATA755/2008 2008-05-09
AT0075508A AT506727B1 (de) 2008-05-09 2008-05-09 Verfahren zur wärmebehandlung eines walzguts aus einer aushärtbaren aluminiumlegierung
PCT/AT2009/000194 WO2009135244A1 (de) 2008-05-09 2009-05-11 Verfahren zur wärmebehandlung eines walzguts aus einer aushärtbaren aluminiumlegierung

Publications (1)

Publication Number Publication Date
US20110048591A1 true US20110048591A1 (en) 2011-03-03

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US12/736,697 Abandoned US20110048591A1 (en) 2008-05-09 2009-05-11 Method for heat treating a rolling stock made of a heat-treatable aluminum alloy

Country Status (4)

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US (1) US20110048591A1 (de)
EP (1) EP2279277A1 (de)
AT (1) AT506727B1 (de)
WO (1) WO2009135244A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113953351A (zh) * 2021-10-22 2022-01-21 东北轻合金有限责任公司 一种铝合金厚板淬火后的矫平方法
US11578921B2 (en) 2018-01-16 2023-02-14 Ebner Industrieofenbau Gmbh Continuous furnace for aluminum strips

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10294553B2 (en) * 2014-09-12 2019-05-21 Aleris Aluminum Duffel Bvba Method of annealing aluminium alloy sheet material
CN113981198B (zh) * 2021-09-30 2023-05-12 浙江明泰控股发展股份有限公司 一种用于解决铝合金紧固件晶间腐蚀的连续式热处理炉

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5662750A (en) * 1995-05-30 1997-09-02 Kaiser Aluminum & Chemical Corporation Method of manufacturing aluminum articles having improved bake hardenability
US5718780A (en) * 1995-12-18 1998-02-17 Reynolds Metals Company Process and apparatus to enhance the paintbake response and aging stability of aluminum sheet materials and product therefrom
US6602364B1 (en) * 1999-02-12 2003-08-05 Norsk Hydro A.S. Aluminium alloy containing magnesium and silicon

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007239005A (ja) * 2006-03-07 2007-09-20 Nippon Steel Corp 室温非時効性、成形性及び塗装焼付け硬化性に優れた６０００系アルミニウム合金板の製造方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5662750A (en) * 1995-05-30 1997-09-02 Kaiser Aluminum & Chemical Corporation Method of manufacturing aluminum articles having improved bake hardenability
US5718780A (en) * 1995-12-18 1998-02-17 Reynolds Metals Company Process and apparatus to enhance the paintbake response and aging stability of aluminum sheet materials and product therefrom
US6602364B1 (en) * 1999-02-12 2003-08-05 Norsk Hydro A.S. Aluminium alloy containing magnesium and silicon

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11578921B2 (en) 2018-01-16 2023-02-14 Ebner Industrieofenbau Gmbh Continuous furnace for aluminum strips
CN113953351A (zh) * 2021-10-22 2022-01-21 东北轻合金有限责任公司 一种铝合金厚板淬火后的矫平方法

Also Published As

Publication number Publication date
AT506727A1 (de) 2009-11-15
EP2279277A1 (de) 2011-02-02
AT506727B1 (de) 2010-10-15
WO2009135244A1 (de) 2009-11-12

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AS Assignment

Owner name: AMAG ROLLING GMBH, AUSTRIA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SCHNITZLBAUMER, JOSEF;ENSER, JOSEF;REEL/FRAME:025241/0767

Effective date: 20100916

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION