EP0018946A1 - Method of producing aluminium strips or sheets, and their use - Google Patents
Method of producing aluminium strips or sheets, and their use Download PDFInfo
- Publication number
- EP0018946A1 EP0018946A1 EP80810134A EP80810134A EP0018946A1 EP 0018946 A1 EP0018946 A1 EP 0018946A1 EP 80810134 A EP80810134 A EP 80810134A EP 80810134 A EP80810134 A EP 80810134A EP 0018946 A1 EP0018946 A1 EP 0018946A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- aluminum
- rolled
- hot
- copper
- sheets
- 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.)
- Granted
Links
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 30
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims description 9
- 239000004411 aluminium Substances 0.000 title description 3
- 238000005097 cold rolling Methods 0.000 claims abstract description 13
- 238000005098 hot rolling Methods 0.000 claims abstract description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 17
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 17
- 229910052802 copper Inorganic materials 0.000 claims description 14
- 239000010949 copper Substances 0.000 claims description 14
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 12
- 229910052749 magnesium Inorganic materials 0.000 claims description 12
- 239000011777 magnesium Substances 0.000 claims description 12
- 229910052710 silicon Inorganic materials 0.000 claims description 12
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 9
- 239000010703 silicon Substances 0.000 claims description 9
- 238000005554 pickling Methods 0.000 claims description 8
- 229910052742 iron Inorganic materials 0.000 claims description 7
- 229910000838 Al alloy Inorganic materials 0.000 claims description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 6
- 229910052748 manganese Inorganic materials 0.000 claims description 6
- 239000011572 manganese Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 4
- 239000012670 alkaline solution Substances 0.000 claims description 4
- 239000000243 solution Substances 0.000 claims description 4
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 239000011651 chromium Substances 0.000 claims 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 claims description 3
- 229920000388 Polyphosphate Polymers 0.000 claims description 2
- 239000003112 inhibitor Substances 0.000 claims description 2
- 239000001205 polyphosphate Substances 0.000 claims description 2
- 235000011176 polyphosphates Nutrition 0.000 claims description 2
- 239000000080 wetting agent Substances 0.000 claims description 2
- YPFNIPKMNMDDDB-UHFFFAOYSA-K 2-[2-[bis(carboxylatomethyl)amino]ethyl-(2-hydroxyethyl)amino]acetate;iron(3+) Chemical compound [Fe+3].OCCN(CC([O-])=O)CCN(CC([O-])=O)CC([O-])=O YPFNIPKMNMDDDB-UHFFFAOYSA-K 0.000 claims 2
- 238000010276 construction Methods 0.000 abstract description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 6
- 230000007704 transition Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000010422 painting Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 210000003660 reticulum Anatomy 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Classifications
-
- 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
- C22F1/057—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 of alloys with copper as the next major constituent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
-
- 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
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
-
- 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
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
- C22C21/08—Alloys based on aluminium with magnesium as the next major constituent with silicon
-
- 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
- C22C21/12—Alloys based on aluminium with copper as the next major constituent
- C22C21/16—Alloys based on aluminium with copper as the next major constituent with magnesium
-
- 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
- C22F1/047—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 of alloys with magnesium as the next major constituent
-
- 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
- C22F1/05—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 of alloys of the Al-Si-Mg type, i.e. containing silicon and magnesium in approximately equal proportions
-
- 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
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49616—Structural member making
- Y10T29/49622—Vehicular structural member making
-
- 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
- Y10T29/00—Metal working
- Y10T29/51—Plural diverse manufacturing apparatus including means for metal shaping or assembling
- Y10T29/5183—Welding strip ends
Definitions
- the invention relates to a method for producing an aluminum strip or sheet, in particular an aluminum sheet of approximately 0.1 to 7 mm thickness for body construction, by hot and cold rolling and the use thereof.
- Resistance spot welding is used as the connection method in the manufacture of automobile bodies, with the service life of the electrodes being specified as approx. 10,000 - 15,000 welding points when connecting steel sheets. Corresponding values when joining aluminum are currently around 100 - 500 points. Then the copper electrodes have to be cleaned of the alloyed aluminum.
- the reason for the increased alloy formation of aluminum and copper in the process of resistance spot welding compared to sheet steel spot welding is, in addition to the uncontrollable physical and thermodynamic properties of the metals aluminum and copper, the relatively high and strongly fluctuating transition resistance from copper electrode to aluminum sheet. This is primarily due to the thickness of the oxide layer and the composition of the upper surface layer attributed.
- the transition resistance of aluminum alloys has a significant influence on their resistance spot weldability, the main reasons for the irregularity of the welds and for the short electrode life in untreated aluminum sheets being the high and uneven transition resistances at the current transition points. These influence the energy conversion in the secondary circuit and cause the quality of the connections created to fluctuate greatly.
- a surface treatment such as: brushing, sandblasting, wet blasting and pickling the semi-finished aluminum products before resistance spot welding greatly reduce the transition resistance.
- the rolled surface is usually very roughened, as a result of which the uniformity of the surface is disturbed and the coating layer applied to body parts, for example, has a correspondingly uneasy effect.
- the inventor has set himself the goal of creating a method for producing readily deformable aluminum strips or sheets with increased spot weldability, which have a surface that is favorable for deformation and painting. In addition, their usability should be improved.
- This object is achieved by a process in which, after hot and cold rolling, the strip or sheet is pickled to an intermediate thickness, which corresponds to about 1.5 to 2.5 times the final thickness of the strip, in alkaline solution and then to its final thickness using of cold rolling aids is cold-rolled and then optionally heat-treated.
- a solution with sodium hydroxide solution, polyphosphate, wetting agent and inhibitors is preferred for pickling.
- aluminum strips or sheets as spot-welded device parts, in particular as body sheets, is also within the scope of the invention, the aluminum strips or sheets having an intermediate thickness of about 1.5 to 2.5 times after hot and cold rolling the final thickness has been pickled in alkaline solution and then cold-rolled to their final thickness using cold rolling aids and, if necessary, heat-treated.
- the following table shows the values for the copper electrode to sheet resistance of the respective variants.
Landscapes
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Materials Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Metal Rolling (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- ing And Chemical Polishing (AREA)
- Heat Treatment Of Nonferrous Metals Or Alloys (AREA)
Abstract
Zur Erhöhung der Punktschweissbarkeit von Aluminiumbändern oder -blechen und zu deren Verwendung vor allem in Karosseriebau wird das Band oder Blech nach dem Warm- und Kaltwalzen auf eine Zwischendicke, welche der etwa 1,5 bis 2,5 fachen Enddicke des Bandes entspricht, in alkalischer Lösung gebeizt sowie anschliessend auf seine Enddicke unter Verwendung von Kaltwalzhilfsmitteln kaltgewalzt und gegebenenfalls dann wärmebehandelt.To increase the spot weldability of aluminum strips or sheets and for their use, particularly in body construction, the strip or sheet is alkaline after hot and cold rolling to an intermediate thickness which corresponds to about 1.5 to 2.5 times the final thickness of the strip Solution pickled and then cold rolled to its final thickness using cold rolling aids and then optionally heat treated.
Description
Die Erfindung betrifft ein Verfahren zum Herstellen eines Aluminiumbandes oder -bleches, insbesondere eines Aluminiumbleches von etwa 0,1 bis 7 mm Dicke für den Karosseriebau, durch Warm- und Kaltwalzen sowie deren Verwendung.The invention relates to a method for producing an aluminum strip or sheet, in particular an aluminum sheet of approximately 0.1 to 7 mm thickness for body construction, by hot and cold rolling and the use thereof.
Der Einsatz von Aluminiumblechen zur Herstellung von Karosserieteilen wi-e z.B. Türen, Motorhauben, Heckklappen und Kotflügel ist bekannt. Im Hinblick auf die vorgesehenen Massnahmen zur Energieeinsparung, insbesondere auch der bereits bestehenden Gesetze in den Vereinigten Staaten von Nordamerika, müssen u.a. die Fahrzeuge leichter gemacht werden, so dass mit dem vermehrten Einsatz von festen und gut umformbaren Aluminiumwerkstoffen für Karosserieteile zu rechnen ist.The use of aluminum sheets for the production of body parts such as e.g. Doors, bonnets, tailgates and fenders are known. With regard to the envisaged measures for energy saving, in particular also the existing laws in the United States of North America, u.a. the vehicles are made lighter, so that the increased use of solid and easily formable aluminum materials for body parts can be expected.
Bei der Fertigung von Automobilkarosserien wird als Verbindungsverfahren das Widerstandspunktschweissen eingesetzt, wobei die Standzeiten der Elektroden beim Verbinden von Stahlblechen mit ca. 10 000 - 15 000 Schweisspunkten angegeben werden. Entsprechende Werte beim Verbinden von Aluminium liegen derzeit etwa bei 100 - 500 Punkte. Danach müssen die Kupferelektroden von dem anlegierten Aluminium gereinigt werden.Resistance spot welding is used as the connection method in the manufacture of automobile bodies, with the service life of the electrodes being specified as approx. 10,000 - 15,000 welding points when connecting steel sheets. Corresponding values when joining aluminum are currently around 100 - 500 points. Then the copper electrodes have to be cleaned of the alloyed aluminum.
Die Ursache für die im Vergleich zur Stahlblechpunktschweissung verstärkte Legierungsbildung von Aluminium und Kupfer beim Vorgang der Widerstandspunktschweissung ist neben den unbeeinflussbaren physikalischen und thermodynamischen Eigenschaften der Metalle Aluminium und Kupfer der relativ hohe und stark schwankende Ueberganswiderstand von Kupferelektrode zum Aluminiumblech. Dieser ist in erster Linie auf die Dicke der Oxidschicht und die Zusammensetzung der Oberflächenschicht zurückzuführen. Bekanntlich hat der Uebergangswiderstand von Aluminium-Legierungen einen wesentlichen Einfluss auf deren Widerstandspunktschweissbarkeit, wobei die Hauptursachen für die Unregelmässigkeit der Schweissungen und für die kurzen Elektrodenstandzeiten bei unbehandelten Aluminiumblechen die hohen und ungleich- mässigen Uebergangswiderstände an den Stromübergangsstellen sind. Diese beeinflussen die Energieumsetzung im Sekundärkreis und bewirken, dass die Qualität der erstellten Verbindungen stark schwankt.The reason for the increased alloy formation of aluminum and copper in the process of resistance spot welding compared to sheet steel spot welding is, in addition to the uncontrollable physical and thermodynamic properties of the metals aluminum and copper, the relatively high and strongly fluctuating transition resistance from copper electrode to aluminum sheet. This is primarily due to the thickness of the oxide layer and the composition of the upper surface layer attributed. As is well known, the transition resistance of aluminum alloys has a significant influence on their resistance spot weldability, the main reasons for the irregularity of the welds and for the short electrode life in untreated aluminum sheets being the high and uneven transition resistances at the current transition points. These influence the energy conversion in the secondary circuit and cause the quality of the connections created to fluctuate greatly.
Eine Oberflächenbehandlung wie: Bürsten, Sandstrahlen, Nassstrahlen und Beizen der Aluminiumhalbzeuge vor dem Widerstandspunktschweissen setzen den Uebergangswiderstand stark herab. Allerdings wird dann z.B. bei Aluminiumblechen die gewalzte Oberfläche meist sehr aufgerauht, wodurch die Gleichmässigkeit der Oberfläche gestört wird und die etwa bei Karosserieteilen aufgebrachte Lackierschicht entsprechend unruhig wirkt.A surface treatment such as: brushing, sandblasting, wet blasting and pickling the semi-finished aluminum products before resistance spot welding greatly reduce the transition resistance. However, e.g. In the case of aluminum sheets, the rolled surface is usually very roughened, as a result of which the uniformity of the surface is disturbed and the coating layer applied to body parts, for example, has a correspondingly uneasy effect.
So hat sich der Erfinder das Ziel gesetzt, ein Verfahren zum Herstellen gut verformbarer Aluminiumbänder bzw. -bleche erhöhter Punktschweissbarkeit zu schaffen, die eine für die Verformung und Lackierung günstige Oberfläche aufweisen. Darüber hinaus soll deren Verwendbarkeit verbessert werden.Thus, the inventor has set himself the goal of creating a method for producing readily deformable aluminum strips or sheets with increased spot weldability, which have a surface that is favorable for deformation and painting. In addition, their usability should be improved.
Diese Aufgabe wird durch ein Verfahren gelöst, bei dem das Band oder Blech nach dem Warm- und Kaltwalzen auf eine Zwischendicke, welche der etwa 1,5 bis 2,5fachen Enddicke des Bandes entspricht, in alkalischer Lösung gebeizt sowie anschliessend auf seine Enddicke unter Verwendung von Kaltwalzhilfsmitteln kaltgewalzt und gegebenenfalls dann wärmebehandelt wird.This object is achieved by a process in which, after hot and cold rolling, the strip or sheet is pickled to an intermediate thickness, which corresponds to about 1.5 to 2.5 times the final thickness of the strip, in alkaline solution and then to its final thickness using of cold rolling aids is cold-rolled and then optionally heat-treated.
Ueberraschenderweise hat sich nämlich gezeigt, dass sich eine wesentliche Verbesserung der Punktschweissbarkeit durch Abtragen der Uebergangswiderstand erhöhenden Oberflächenschicht bei 1,5 bis 2,5facher Enddicke erzielen lässt. Die nachfolgenden Kaltwalzgänge und Wärmebehandlungen verschlechtern diese gute Punktschweissbarkeit nur unwesentlich. Man erhält somit die Möglichkeit, durch das anschliessende Walzen eine für das Umformen und Lackieren optimale Oberfläche einzustellen. Ausserdem ist dieser Weg im Vergleich zur Oberflächenbehandlung der fertiggewalzten Bänder wirtschaflticher, da die zu behandelnde Oberfläche im Zwischenstadium kleiner ist.Surprisingly, it has been shown that a significant improvement in spot weldability is achieved by removing the surfaces that increase the transition resistance layer at 1.5 to 2.5 times the final thickness. The subsequent cold rolling and heat treatments only slightly deteriorate this good spot weldability. This gives you the option of setting an optimal surface for forming and painting by the subsequent rolling. Moreover, this w ay wirtschaflticher compared to the surface treatment of the finish-rolled bands, since the surface to be treated is smaller in the intermediate stage.
Als besonders günstig haben sich dabei Aluminiumlegierungen der folgenden Zusammensetzungen erwiesen:
- 1. 0,4 bis 1,5 % Magnesium, 0,3 bis 1,5 % Silizium, 0 bis 0,03 % Kupfer, 0 bis 0,5 % Eisen, 0 bis 1,0 % Mangan und Aluminium als Rest.
- 2. 0,3 bis 6 % Magnesium, 0.bis 1,0 % Mangan, 0 bis 0,40 % Silizium, 0 bis 0,40 % Eisen, 0 bis 0,2 % Kupfer, 0 bis 0,5 % Chrom und Aluminium'als Rest.
- 3. 1,0 bis 5,0 % Kupfer, 0,4 bis 2,5 % Magnesium, 0 bis 0,8 % Silizium, 0 bis 0,7 % Eisen, 0 bis 1,5 % Mangan.
- 1. 0.4 to 1.5% magnesium, 0.3 to 1.5% silicon, 0 to 0.03% copper, 0 to 0.5% iron, 0 to 1.0% manganese and aluminum as the rest.
- 2. 0.3 to 6% magnesium, 0 to 1.0% manganese, 0 to 0.40% silicon, 0 to 0.40% iron, 0 to 0.2% copper, 0 to 0.5% chromium and aluminum as the rest.
- 3. 1.0 to 5.0% copper, 0.4 to 2.5% magnesium, 0 to 0.8% silicon, 0 to 0.7% iron, 0 to 1.5% manganese.
Diese werden dann warm- und kaltgewalzt, zwischengebeizt, fertiggewalzt und wärmebehandelt.These are then hot and cold rolled, intermediate pickled, finish rolled and heat treated.
Zum Beizen wird eine Lösung mit Natronlauge, Polyphosphat, Netzmittel und Inhibitoren bevorzugt.A solution with sodium hydroxide solution, polyphosphate, wetting agent and inhibitors is preferred for pickling.
Im Rahmen der Erfindung liegt auch die Verwendung von Aluminiumbändern oder -blechen als punktgeschweisste Vorrichtungsteile, insbesondere als Karosseriebleche, wobei die Aluminiumbänder oder -bleche nach dem Warm- und Kaltwalzen auf eine Zwischendicke vom etwa 1,5 bis 2,5fachen der Enddicke in alkalischer Lösung gebeizt sowie anschliessend auf ihre Enddicke unter Verwendung von Kaltwalzhilfsmitteln kaltgewalzt und gegebenenfalls wärmebehandelt worden sind. ,The use of aluminum strips or sheets as spot-welded device parts, in particular as body sheets, is also within the scope of the invention, the aluminum strips or sheets having an intermediate thickness of about 1.5 to 2.5 times after hot and cold rolling the final thickness has been pickled in alkaline solution and then cold-rolled to their final thickness using cold rolling aids and, if necessary, heat-treated. ,
Es wurde je ein Band der Werkstoffe
- 1) ohne Zwischenbeizung, also normaler Fertigungsweg
- 2) mit Zwischenbeizung und anschliessendem Abwalzen an Enddicke mit anschl. Wärmebehandlung.
- 1) without intermediate pickling, i.e. normal production route
- 2) with intermediate pickling and subsequent rolling to final thickness with subsequent heat treatment.
In der folgenden Tabelle sind die Werte für die Widerstände Kupferelektrode zu Blech der jeweiligen Varianten aufgeführt.
Claims (7)
dadurch gekennzeichnet,
dass das Band oder Blech nach dem Warm- und Kaltwalzen auf eine Zwischendicke, welche der etwa 1,5 bis 2,5fachen Enddicke des Bandes entspricht, in alkalischer Lösung gebeizt sowie anschliessend auf seine Enddicke unter Verwendung von Kaltwalzhilfsmitteln kaltgewalzt und gegebenenfalls dann wärmebehandelt wird.1. A process for producing an aluminum strip or sheet, in particular an aluminum sheet of approximately 0.1 to 7 mm in thickness for the body shop, by hot and cold rolling,
characterized,
that the strip or sheet, after hot and cold rolling, is pickled in an alkaline solution to an intermediate thickness, which corresponds to about 1.5 to 2.5 times the final thickness of the strip, and then cold-rolled to its final thickness using cold rolling aids and then optionally heat-treated.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2917627 | 1979-05-02 | ||
| DE2917627A DE2917627A1 (en) | 1979-05-02 | 1979-05-02 | METHOD FOR PRODUCING ALUMINUM TAPES OR SHEETS, AND USE THEREOF |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0018946A1 true EP0018946A1 (en) | 1980-11-12 |
| EP0018946B1 EP0018946B1 (en) | 1983-05-11 |
Family
ID=6069723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP80810134A Expired EP0018946B1 (en) | 1979-05-02 | 1980-04-21 | Method of producing aluminium strips or sheets, and their use |
Country Status (4)
| Country | Link |
|---|---|
| US (2) | US4326895A (en) |
| EP (1) | EP0018946B1 (en) |
| JP (1) | JPS55152160A (en) |
| DE (2) | DE2917627A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0480402A1 (en) * | 1990-10-09 | 1992-04-15 | Sumitomo Light Metal Industries Limited | Process for manufacturing aluminium alloy material with excellent formability, shape fixability and bake hardenability |
| CN114277289A (en) * | 2020-09-27 | 2022-04-05 | 比亚迪股份有限公司 | Die-casting aluminum alloy and preparation method thereof, anodic oxidation appearance piece and electronic equipment |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60159147A (en) * | 1984-01-30 | 1985-08-20 | Mitsubishi Alum Co Ltd | Aluminum alloy |
| JPS60159145A (en) * | 1984-01-30 | 1985-08-20 | Mitsubishi Alum Co Ltd | Aluminum alloy |
| JPS6227544A (en) * | 1985-07-26 | 1987-02-05 | Sky Alum Co Ltd | Heat-treated-type aluminum alloy rolled sheet for forming working and its production |
| JPS62177143A (en) * | 1986-01-30 | 1987-08-04 | Kobe Steel Ltd | Aluminum alloy sheet excellent in formability and baking hardening and its production |
| FR2617189B1 (en) * | 1987-06-24 | 1989-10-20 | Cegedur | ALUMINUM ALLOY SHEETS CONTAINING MAGNESIUM SUITABLE FOR STAMPING AND STRETCHING BOX BODIES AND PROCESS FOR OBTAINING SAME |
| JPS6411937A (en) * | 1987-07-02 | 1989-01-17 | Sky Aluminium | Aluminum alloy rolled plate for forming and its production |
| JPH02118050A (en) * | 1988-10-27 | 1990-05-02 | Sky Alum Co Ltd | Aluminum alloy rolled sheet for forming and its manufacture |
| DE4131382A1 (en) * | 1990-09-21 | 1992-03-26 | Kobe Steel Ltd | Surface treated aluminium@ alloy sheet for motor car construction - used in making decorative coloured items, zinc phosphate layer having fine grained structure of uniform thickness |
| DE102016208026A1 (en) * | 2016-05-10 | 2017-11-16 | Volkswagen Aktiengesellschaft | Welding electrode, method for resistance spot welding and motor vehicle |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1246649B (en) * | 1961-10-30 | 1967-08-10 | United States Steel Corp | Method for producing sheet metal for tin cans or the like. |
| US3487674A (en) * | 1965-06-06 | 1970-01-06 | Fuji Iron & Steel Co Ltd | Method of producing cold rolled steel sheets suitable for press forming |
| DE2334280B2 (en) * | 1973-02-13 | 1975-11-27 | Cegedur Societe De Transformation De L'aluminium Pechiney, Paris | |
| DE2810932A1 (en) * | 1977-03-28 | 1978-10-12 | Alusuisse | ALUMINUM ALLOY WITH IMPROVED WELDABILITY |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4043840A (en) * | 1976-07-09 | 1977-08-23 | Swiss Aluminium Ltd. | Aluminum alloys possessing improved resistance weldability |
-
1979
- 1979-05-02 DE DE2917627A patent/DE2917627A1/en not_active Withdrawn
-
1980
- 1980-04-18 US US06/141,430 patent/US4326895A/en not_active Expired - Lifetime
- 1980-04-21 EP EP80810134A patent/EP0018946B1/en not_active Expired
- 1980-04-21 DE DE8080810134T patent/DE3063052D1/en not_active Expired
- 1980-05-02 JP JP5936280A patent/JPS55152160A/en active Pending
-
1982
- 1982-01-25 US US06/342,506 patent/US4460418A/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1246649B (en) * | 1961-10-30 | 1967-08-10 | United States Steel Corp | Method for producing sheet metal for tin cans or the like. |
| US3487674A (en) * | 1965-06-06 | 1970-01-06 | Fuji Iron & Steel Co Ltd | Method of producing cold rolled steel sheets suitable for press forming |
| DE2334280B2 (en) * | 1973-02-13 | 1975-11-27 | Cegedur Societe De Transformation De L'aluminium Pechiney, Paris | |
| DE2810932A1 (en) * | 1977-03-28 | 1978-10-12 | Alusuisse | ALUMINUM ALLOY WITH IMPROVED WELDABILITY |
Non-Patent Citations (1)
| Title |
|---|
| ALUMINIUM-TASCHENBUCH, 13. Auflage, 1974 ALUMINIUM-VERLAG G.m.b.H., Dusseldorf. * Seiten 581, 673 * * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0480402A1 (en) * | 1990-10-09 | 1992-04-15 | Sumitomo Light Metal Industries Limited | Process for manufacturing aluminium alloy material with excellent formability, shape fixability and bake hardenability |
| CN114277289A (en) * | 2020-09-27 | 2022-04-05 | 比亚迪股份有限公司 | Die-casting aluminum alloy and preparation method thereof, anodic oxidation appearance piece and electronic equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| US4326895A (en) | 1982-04-27 |
| DE2917627A1 (en) | 1980-11-13 |
| US4460418A (en) | 1984-07-17 |
| DE3063052D1 (en) | 1983-06-16 |
| EP0018946B1 (en) | 1983-05-11 |
| JPS55152160A (en) | 1980-11-27 |
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