DE10350885A1 - Process to manufacture corrosion-proofed automotive frame member from flame-aluminised sheet steel - Google Patents
Process to manufacture corrosion-proofed automotive frame member from flame-aluminised sheet steel Download PDFInfo
- Publication number
- DE10350885A1 DE10350885A1 DE2003150885 DE10350885A DE10350885A1 DE 10350885 A1 DE10350885 A1 DE 10350885A1 DE 2003150885 DE2003150885 DE 2003150885 DE 10350885 A DE10350885 A DE 10350885A DE 10350885 A1 DE10350885 A1 DE 10350885A1
- Authority
- DE
- Germany
- Prior art keywords
- hot
- steel
- strip
- corrosion
- thickness
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/02—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/20—Deep-drawing
- B21D22/208—Deep-drawing by heating the blank or deep-drawing associated with heat treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/88—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/62—Quenching devices
- C21D1/673—Quenching devices for die quenching
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2221/00—Treating localised areas of an article
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Heat Treatment Of Sheet Steel (AREA)
- Coating With Molten Metal (AREA)
Abstract
Beschrieben wird die Herstellung eines korrosionsgeschützten, gehärteten Stahlbauteils 1 mit unterschiedlichen Wanddicken. Erfindungsgemäß wird ein Stahlband zunächst in seiner Ausgangsdicke in an sich bekannter Weise durch Abwalzen partiell reduziert. Anschließend wird das Band unter Ausbildung einer sogenannten intermetallischen Phase feueraluminiert. Eine aus diesem Band mit definierter Geometrie und in einer definierten Position entnommenen Platine wird ausschließlich warm umgeformt und im Umformwerkzeug gehärtet.Described is the production of a corrosion-protected, hardened steel component 1 with different wall thicknesses. According to the invention, a steel strip is first partially reduced in its starting thickness in a conventional manner by means of rolling. Subsequently, the strip is hot-dip coated to form a so-called intermetallic phase. A board removed from this strip with a defined geometry and in a defined position is exclusively hot formed and hardened in the forming tool.
Description
Die Erfindung betrifft ein Verfahren zum Herstellen eines korrosionsgeschützten, warmgeformten und werkzeuggehärteten Formbauteils aus einem feueraluminierten Stahlband gemäß dem Oberbegriff von Anspruch 1.The The invention relates to a method for producing a corrosion-protected, thermoformed and tool-hardened Molded part of a hot-dip aluminized steel strip according to the preamble of claim 1.
In
der Kraftfahrzeugindustrie werden vielfach Struktur- und/oder Sicherheitsteile
aus hochfestem Stahl eingesetzt. Dabei ist es zum einen aus der
Aus
der
Es hat sich jedoch herausgestellt, dass sich die intermetallische Phase zwischen der Beschichtung und dem borlegierten Stahl bereits durch den Wärmeeintrag beim Tauchaltieren oder Feueraluminieren bildet. Die intermetallische Phase liegt daher bereits in dem beschichteten Band vor dem eigentlichen Warmformvorgang vor. Die intermetallische Phase ist jedoch so spröde, dass sie bei jedem Kaltformen reißt. Das beschichtete Band ist daher nur noch warmverformbar, sonst ist der Korrosionsschutz gefährdet und im fertigen Formbauteil nicht mehr genügend gegeben. Bereits die DE-PS 1 252 034 stellt im übrigen fest, dass ein feueraluminierter Überzug sich zwar warmformen lässt, aber die Kaltformung schlecht aushält.It However, it has been found that the intermetallic phase between the coating and the boron-alloyed steel already through the heat input when diving or fire aluminizing forms. The intermetallic Phase is therefore already in the coated tape before the actual Thermoforming process before. However, the intermetallic phase is so brittle that she breaks with every cold forming. The coated tape is therefore only thermoformable, otherwise the corrosion protection is at risk and not given enough in the finished molded component. Already the DE-PS 1 252 034 represents otherwise notes that a hot-dip coated coating will thermoform leaves, but the cold forming badly endures.
Ein kalt Vorformen ist jedoch häufig eine notwendige Verfahrensvoraussetzung zur Erzielung komplexer geometrischer Strukturen, die nicht in einem Zug aus einer Platine warm umgeformt werden können. Muss aufgrund der Bauteilgeometrie mehr als ein Umformschritt ausgeführt werden, wird in der Regel kalt vorgeformt, da bei mehreren Warmformschritten der Kontakt mit dem Umformwerkzeug die erwärmte Platine bereits beim ersten Umformschritt unter die erforderliche Umformtemperatur abkühlen und eine Härtung einsetzten würde, die weitere Formschritte ohne ein Zwischenerwärmen ausschließt. Eine Zwischenerwärmung erhöht jedoch erheblich die Kosten und die gesamte Prozessdauer des Herstellungsverfahrens.One cold preforming, however, is common a necessary procedural requirement for achieving complex geometric structures that are not in a train from a circuit board can be thermoformed. If more than one forming step has to be carried out due to the component geometry, is usually preformed cold, as in several thermoforming steps the contact with the forming tool the heated board already at the first Cool down the forming step below the required forming temperature and a cure would use excludes the further molding steps without an intermediate heating. A between warming elevated however, significantly the cost and the entire process time of the manufacturing process.
Aus
Gründen
des Leichtbaus ist es dabei mittlerweile erforderlich, die Wandstärken eines
Formbauteils gezielt an die erforderlichen Belastungen anzupassen.
Dabei wird das Bauteil nicht mehr über seine gesamte Ausdehnung
mit der Wandstärke
der am stärksten
beanspruchten Stelle versehen. Stattdessen wird die Wandstärke in Bereichen
mit geringerer Belastung gezielt reduziert, um Material und Gewicht
einzusparen. Aus der
Aufgabe der Erfindung ist es daher, ein Verfahren zum Herstellen eines korrosionsgeschützten, gewichts- und belastungsoptimierten warmgeformten und gehärteten Formbauteils aufzuzeigen.task The invention therefore relates to a method for producing a corrosion-protected, weight-reduced and stress-optimized thermoformed and hardened molded component show.
Diese Aufgabe löst die Erfindung mit dem kennzeichnenden Teil von Anspruch 1. Demnach wird ein Stahlband vor dem Feueraluminieren durch Abwalzen partiell in der Dicke reduziert. Danach erst wird das Stahlband feueraluminiert, wodurch die intermetallische Phase zwischen dem Stahlband und der Aluminiumbeschichtung entsteht. Anschließend wird aus dem partiell dickenreduzierten und beschichteten Stahlband mit einer definierten Position und Geometrie eine Platine entnommen, warm zu einem Formbauteil umgeformt und im Werkzeug gehärtet. Dabei werden in dem so hergestellten Formbauteil definierte Bereiche mit reduzierter Wandstärke gezielt eingestellt. Durch die Feueraluminierung bleibt das Formbauteil auch während der Erwärmung und Härtung zunderfrei. Zudem ist der benötigte Korrosionsschutz bereits gegeben. Um diesen lückenlos zu gestalten, kann das Formbauteil an allen erforderlichen Schnittkanten mit einer Korrosionsschutzschicht nachbeschichtet werden.These Task solves the invention with the characterizing part of claim 1. Accordingly A steel strip becomes partial prior to the hot aluminizing by rolling reduced in thickness. Only then is the steel strip hot-dip aluminized, whereby the intermetallic phase between the steel strip and the Aluminum coating is created. Subsequently, from the partial reduced thickness and coated steel strip with a defined Position and geometry taken from a board, warm to a molded part deformed and hardened in the tool. In this case, defined areas are defined in the molded component produced in this way with reduced wall thickness targeted. Through the Feueraluminierung remains the molded part even while the warming and curing scale-free. In addition, the required Corrosion protection already given. To make this gapless, can the molded part at all required cutting edges with a Anti-corrosion layer to be recoated.
Es ist von großer Bedeutung, dass nach dem Feueraluminieren des partiell dickenreduzierten Bandes nur Umformvorgänge im erwärmten Zustand an einer aus dem feueraluminierten Band entnommenen Platine durchgeführt werden, um den Korrosionsschutz nicht zu gefährden. Daher ist es auch unbedingt erforderlich, sämtliche dickenreduzierenden Walzvorgänge vor dem Feueraluminieren durchzuführen, da auch diese Walzvorgänge als Kaltformen die Schutzschicht reißen lassen.It is great Meaning that after the fire aluminizing the partially reduced thickness Bandes only forming operations in the heated Condition are carried out on a board removed from the hot-dip aluminized strip, so as not to endanger the corrosion protection. That's why it's essential required, all thickness reducing rolling operations before the fire aluminizing, as these rolling operations as Cold forming can cause the protective layer to crack.
Erfindungsgemäß werden damit die Vorteile beider Verfahren verbunden und die Nachteile gleichzeitig vermieden. Das fertige Formbauteil besitzt bereits einen guten Korrosionsschutz. Zudem sind die Wandstärken in dem erforderlichen Umfang den reduzierten Belastungen angepasst. Weiterhin können die Umformvorgänge nach dem Feueraluminieren aufgrund der bereits vorliegenden unterschiedlichen Dicken auf das Warmformen beschränkt werden. Das fertige Formbauteil ist ein Produkt mit guter Maßhaltigkeit, hervorragenden Materialeigenschaften und einem guten Korrosionsschutz mit einem optimierten Gewichts-/Leistungsverhältnis.According to the invention hence the advantages of both methods and the disadvantages avoided at the same time. The finished molded part already has a good corrosion protection. In addition, the wall thicknesses in adapted to the required extent to the reduced loads. Furthermore you can the forming operations after the fire aluminizing due to the already existing different ones Thicknesses limited to thermoforming become. The finished molded part is a product with good dimensional stability, excellent material properties and good corrosion protection with an optimized weight / performance ratio.
Nachfolgend
ist die Erfindung anhand der einzigen Figur näher erläutert. Die Figur zeigt beispielhaft für ein Sicherheits-
und/oder Strukturbauteil eine B-Säule
Rest
Eisen einschließlich
erschmelzungsbedingter Verunreinigungen. Nach dem Warmumformen und Härten stellen
sich bei diesem Stahl ein Streckgrenze RP0,2 ≥ 950 MPa,
eine Zugfestigkeit Rm ≥ 1350 MPa und eine Dehnung A5 ≥ 8 % ein.
Dieser Stahl ließ sich
bisher nur mit Zinkflakes (Deltatone) einigermaßen befriedigend be schichten,
wobei die Haftungseigenschaften der Zinkflakeschicht begrenzt sind.
Für die
B-Säule
Durch
den Einsatz eines bereits im Band partiell dickenreduzierten und
anschließend
feueraluminierten Stahls der oben genannten Zusammensetzung kann
die gesamte B-Säule
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2003150885 DE10350885B4 (en) | 2003-10-31 | 2003-10-31 | A method of making a thermoformed and tool hardened mold component |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2003150885 DE10350885B4 (en) | 2003-10-31 | 2003-10-31 | A method of making a thermoformed and tool hardened mold component |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE10350885A1 true DE10350885A1 (en) | 2005-06-16 |
| DE10350885B4 DE10350885B4 (en) | 2008-07-10 |
Family
ID=34584832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE2003150885 Expired - Fee Related DE10350885B4 (en) | 2003-10-31 | 2003-10-31 | A method of making a thermoformed and tool hardened mold component |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE10350885B4 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101972823A (en) * | 2010-06-07 | 2011-02-16 | 浙江吉利汽车有限公司 | Technological process for improving rigidity of skylight part on car roof |
| EP2497840A1 (en) | 2011-03-10 | 2012-09-12 | Schwartz, Eva | Oven system for partially heating steel blanks |
| CN103212625A (en) * | 2013-05-10 | 2013-07-24 | 奇瑞汽车股份有限公司 | Stamping technology treatment method of skylight on automobile top cover |
| DE102015103721B3 (en) * | 2015-03-13 | 2015-12-17 | Benteler Automobiltechnik Gmbh | Method for producing a Blechumformbauteils with partially different wall thicknesses and Achshilfsrahmen |
| US9434422B2 (en) | 2014-03-04 | 2016-09-06 | Ford Global Technologies, Llc | Geometric/mechanical isolation of aluminum to steel joining at trim edges for corrosion protection |
| EP2890821B1 (en) | 2012-08-31 | 2018-01-10 | Bayerische Motoren Werke Aktiengesellschaft | Method and production facility for producing a hot-formed or press-hardened shaped sheet metal part with a metallic corrosion protection coating, shaped sheet metal part produced therewith and motor vehicle body with such shaped sheet metal part |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009049398C5 (en) | 2009-10-14 | 2015-05-07 | Benteler Automobiltechnik Gmbh | Method for producing a structural component for a motor vehicle and structural component |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2452486C2 (en) * | 1973-11-06 | 1985-10-17 | Plannja AB, Luleå | Process for press forming and hardening a steel sheet with a small material thickness and good dimensional accuracy |
| DE10048312A1 (en) * | 2000-09-29 | 2002-04-25 | Benteler Werke Ag | Flow turning device for steel sheet billets, esp. tailored blanks has forming chamber with forming rollers adjustable between fixed stop and elastic support |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1252034B (en) * | 1967-10-12 | Societe des Acieries de Pompey, Pompey, Meurthe-et-Moselle (Frankreich) | Coating iron or steel with an iron-aluminum alloy coating for hot working | |
| DE19704300B4 (en) * | 1997-02-06 | 2008-07-10 | Benteler Ag | Method for producing boards with different thicknesses |
| FR2787735B1 (en) * | 1998-12-24 | 2001-02-02 | Lorraine Laminage | PROCESS FOR PRODUCING A WORKPIECE FROM A STRIP OF ROLLED STEEL SHEET AND ESPECIALLY HOT ROLLED |
-
2003
- 2003-10-31 DE DE2003150885 patent/DE10350885B4/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2452486C2 (en) * | 1973-11-06 | 1985-10-17 | Plannja AB, Luleå | Process for press forming and hardening a steel sheet with a small material thickness and good dimensional accuracy |
| DE10048312A1 (en) * | 2000-09-29 | 2002-04-25 | Benteler Werke Ag | Flow turning device for steel sheet billets, esp. tailored blanks has forming chamber with forming rollers adjustable between fixed stop and elastic support |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101972823A (en) * | 2010-06-07 | 2011-02-16 | 浙江吉利汽车有限公司 | Technological process for improving rigidity of skylight part on car roof |
| CN101972823B (en) * | 2010-06-07 | 2012-09-26 | 浙江吉利汽车有限公司 | Technological process for improving rigidity of skylight part on car roof |
| EP2497840A1 (en) | 2011-03-10 | 2012-09-12 | Schwartz, Eva | Oven system for partially heating steel blanks |
| WO2012120123A1 (en) | 2011-03-10 | 2012-09-13 | Schwartz, Eva | Furnace system for the controlled heat treatment of sheet metal components |
| US9493856B2 (en) | 2011-03-10 | 2016-11-15 | Schwartz Gmbh | Furnace system for the controlled heat treatment of sheet metal components |
| US10287650B2 (en) | 2011-03-10 | 2019-05-14 | Schwartz Gmbh | Furnace system for the controlled heat treatment of sheet metal parts |
| EP2890821B1 (en) | 2012-08-31 | 2018-01-10 | Bayerische Motoren Werke Aktiengesellschaft | Method and production facility for producing a hot-formed or press-hardened shaped sheet metal part with a metallic corrosion protection coating, shaped sheet metal part produced therewith and motor vehicle body with such shaped sheet metal part |
| CN103212625A (en) * | 2013-05-10 | 2013-07-24 | 奇瑞汽车股份有限公司 | Stamping technology treatment method of skylight on automobile top cover |
| US9434422B2 (en) | 2014-03-04 | 2016-09-06 | Ford Global Technologies, Llc | Geometric/mechanical isolation of aluminum to steel joining at trim edges for corrosion protection |
| US9840288B2 (en) | 2014-03-04 | 2017-12-12 | Ford Global Technologies, Llc | Geometric/mechanical isolation of aluminum to steel joining at trim edges for corrosion protection |
| DE102015103721B3 (en) * | 2015-03-13 | 2015-12-17 | Benteler Automobiltechnik Gmbh | Method for producing a Blechumformbauteils with partially different wall thicknesses and Achshilfsrahmen |
| US10226809B2 (en) | 2015-03-13 | 2019-03-12 | Benteler Automobiltechnik Gmbh | Method for producing a shaped sheet metal part having wall thicknesses differing from each other by region, and axle subframe |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10350885B4 (en) | 2008-07-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OP8 | Request for examination as to paragraph 44 patent law | ||
| 8364 | No opposition during term of opposition | ||
| R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |