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WO2018091039A1 - Procédé de fabrication de disques en acier biphasé offrant une aptitude au formage à froid améliorée - Google Patents

Procédé de fabrication de disques en acier biphasé offrant une aptitude au formage à froid améliorée Download PDF

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Publication number
WO2018091039A1
WO2018091039A1 PCT/DE2017/100970 DE2017100970W WO2018091039A1 WO 2018091039 A1 WO2018091039 A1 WO 2018091039A1 DE 2017100970 W DE2017100970 W DE 2017100970W WO 2018091039 A1 WO2018091039 A1 WO 2018091039A1
Authority
WO
WIPO (PCT)
Prior art keywords
max
sheet
temperature
board
cutting
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.)
Ceased
Application number
PCT/DE2017/100970
Other languages
German (de)
English (en)
Inventor
Ingwer Denks
Stefan MÜTZE
Christian PELZ
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.)
Salzgitter Flachstahl GmbH
Original Assignee
Salzgitter Flachstahl GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Salzgitter Flachstahl GmbH filed Critical Salzgitter Flachstahl GmbH
Publication of WO2018091039A1 publication Critical patent/WO2018091039A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/34—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tyres; for rims
    • 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
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/16—Heating or cooling
    • 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
    • B21D53/26—Making other particular articles wheels or the like
    • B21D53/30—Making other particular articles wheels or the like wheel rims
    • 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
    • C21D7/00—Modifying the physical properties of iron or steel by deformation
    • C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
    • 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
    • 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
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • 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
    • C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
    • 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B2310/00—Manufacturing methods
    • B60B2310/20—Shaping
    • B60B2310/206—Shaping by stamping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B2310/00—Manufacturing methods
    • B60B2310/20—Shaping
    • B60B2310/211—Shaping by folding or bending
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B2310/00—Manufacturing methods
    • B60B2310/50—Thermal treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B2360/00—Materials; Physical forms thereof
    • B60B2360/10—Metallic materials
    • B60B2360/102—Steel
    • 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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/005—Ferrite
    • 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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/008—Martensite
    • 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
    • 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
    • C21D2221/02—Edge parts

Definitions

  • the invention relates to a method for the production of Radschommeln from dual-phase steel, with improved cold workability according to claim 1 made from
  • Hot strip cut to size at room temperature is usually mechanical separation processes, such. shearing or punching, but more rarely also thermal separation methods, such as e.g. laser cutting, for use.
  • Thermal separation processes are significantly more cost-intensive compared to mechanical ones
  • the cut board After cutting, the cut board is placed in a Urnformwerkmaschine and produced in single or multi-stage forming steps, the finished wheel.
  • DP steels have a high strength during cold forming, which is technically described by the solidification exponent. A high one
  • Solidification exponent leads to particularly advantageous properties during molding planar areas of complex parts, where in particular a pronounced
  • Thermoformability is required.
  • a high solidification exponent is achieved in the DP steels by a balanced ratio of the structural components Ferrit and Martenstt.
  • ferrite is a soft component
  • martensite usually prevails as a hard component insular in a ferritic matrix.
  • the resulting advantageous properties of the microstructure with regard to the cold forming in areal areas is simultaneous with a comparatively high limitation of the formability
  • edges results in a massive local stress, which leads to an early high defect density at the boundary of martensite and ferrite grains, which in turn leads to a comparatively early failure of the sheared edge in the
  • Edge crack sensation is performed with a hole expansion test according to ISO 16630.
  • the published patent application DE 10 2014 016614 A1 discloses a method for producing a cold-formed component from a sheet-metal blank which has been sheared at room temperature and optionally with various further production steps carried out at room temperature, such as e.g. Punching or cutting operations are known in which the cold edge hardened during the cutting or punching operations sheet edge areas, which undergo a subsequent cold working in the manufacture of the component, are heated to a temperature of at least 600 "C and the time of the temperature is less than 10 seconds This is intended to improve the cold workability of these cold worked
  • Sheet edges are significantly improved.
  • this method is used in dual-phase steels.
  • the object of the present invention is to provide a process for the production of dual phase steel wheeled dishes with improved mat formability. made of cold-formed blanks, which have an improved formability of work-hardened, mechanically separated sheet edges.
  • this object is achieved by a method with the following steps:
  • the content limits arise from the need to produce a dual-phase ferrite steel with embedded martensilins in the hot strip.
  • C-casings of> 0.04% are used to set sufficiently high levels of martensite in the ferritic matrix, with contents of less than 0.2% to ensure the weldability of the base material ,
  • the Si content should be less than 0.5% to avoid firmly adhering scale during hot rolling, as this can not be completely removed by pickling and thus adversely affects the performance characteristics of the component. On the other hand, contents of at least 0.05% are typical of steel.
  • An Mn content of at least 0.2% serves to increase the strength by
  • Mn content should not exceed 1.5% as it tends to increase segregation.
  • the result are midsite center lines. which adversely affect the performance characteristics.
  • the sum content of should be at least 0.1% to the critical
  • the Cr content should be at most 0.8% since, similar to Mn Cr, the critical cooling rate for adjusting martensite decreases. Higher contents are not useful for cost reasons.
  • Wheel cups made in accordance with the present invention have the advantage that the present alloy composition of the dual phase composite material has a high tensile strength of up to 950 MPa and a low draw for drawdown applications
  • the steel advantageously has a particularly high work hardening capacity, which has a positive effect on the mechanical properties of the finished molded wheel dish.
  • Heating the cutting and / or punching edges produces sheet edges that have a particularly high formability in Lochetzweit mit without cracking on the sheet edges.
  • the heat is applied over the entire sheet thickness and in the plane direction of the board in an area which corresponds at most to the thickness of the sieve
  • the effect of heat depends on the type of heat treatment process.
  • the heating itself can take place arbitrarily, for example, conductively, inductively via radiation heating or by means of laser processing.
  • Excellent for the heat treatment is the conductive heating, as for example in the
  • an advantageous development of the invention provides for rinsing these areas with inert gases, for example argon.
  • the inert gas purging takes place during the duration of the heat treatment but can also, if necessary, be made shortly before the beginning and / or in a limited period of time after the heat treatment has been carried out.
  • the heat input is very concentrated in the shard-influenced
  • Cut edge areas and is therefore associated with a comparatively low energy consumption, in particular with regard to methods in which the entire Piatine is supplied to a heating or time-consuming by orders of magnitude
  • the process window for the temperature to be reached in the cutting edge area is also very large and covers a temperature range from above 700 ° C up to the
  • the increase in strength does not have any negative influence on the hole expansion capacity, regardless of whether a harder and less tough microstructure is set compared to the starting structure, so that too
  • the decisive factor is that the introduced by the cutting
  • the heat treatment of the cold-formed cut edge areas can be carried out completely at any time after the cutting or punching processes and before the forming of the board or as an intermediate step in multi-stage forming operations of the board for producing a wheel disc, so that the process steps cutting or punching the board, Heat treatment of the cutting edges and forming the board from each other are completely decoupled.
  • the production is much more flexible than in the prior art in the integration of an edge modification by
  • the method can be integrated as an intermediate production step in a series production, which specifies a cycle in the range of 0.1 to 10 seconds.
  • a cycle in the range of 0.1 to 10 seconds.
  • the production of Sheet metal components in the automotive sector in several successive steps thus represents a predestined area of application.
  • the forming of the board prepared in this way can advantageously be carried out with the forming tools already in production, since no additional heating devices, such as e.g. Oven, necessary for heating the board itself. This allows a further cost-effective production and by the decoupling of the manufacturing steps a high flexibility in the production process.
  • the heating of the cut edges take place in a combined with the respective manufacturing process step.
  • the cutting and stamping devices may be provided with a downstream heat treatment device or this may be directly upstream of the forming device for cold forming of the board.
  • the invention is applicable to hot rolled steel strip having yield strengths of 280 MPa to 700 MPa and tensile strengths of 450 MPa to 950 MPa.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Heat Treatment Of Sheet Steel (AREA)

Abstract

L'invention concerne un procédé de fabrication d'un disque en acier biphasé offrant une aptitude au formage à froid améliorée, et possédant des arêtes de feuille métallique séparées par voie mécanique et écrouies à froid, comprenant les étapes suivantes : - prendre un feuillard à chaud ou une large bande à chaud présentant la composition d'alliage requise, et ayant une structure biphasée, constituée d'une matrice ferritique, dans laquelle une biphase majoritairement martensitique est incluse sous forme d'îlots, - découper une platine à température ambiante et éventuellement exécuter d'autres opérations d'estampage ou de découpe, - chauffer exclusivement les zones d'arêtes de feuille métallique écrouies à froid par les opérations de découpe ou d'estampage de la platine à une température d'au moins 700°C pendant un temps de maintien maximal de 10 secondes puis refroidir à l'air, - effectuer le formage à froid de la platine en une ou plusieurs étapes afin d'obtenir un disque à température ambiante.
PCT/DE2017/100970 2016-11-15 2017-11-15 Procédé de fabrication de disques en acier biphasé offrant une aptitude au formage à froid améliorée Ceased WO2018091039A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016121905.3 2016-11-15
DE102016121905.3A DE102016121905A1 (de) 2016-11-15 2016-11-15 Verfahren zur Herstellung von Radschüsseln aus Dualphasenstahl mit verbesserter Kaltumformbarkeit

Publications (1)

Publication Number Publication Date
WO2018091039A1 true WO2018091039A1 (fr) 2018-05-24

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PCT/DE2017/100970 Ceased WO2018091039A1 (fr) 2016-11-15 2017-11-15 Procédé de fabrication de disques en acier biphasé offrant une aptitude au formage à froid améliorée

Country Status (2)

Country Link
DE (1) DE102016121905A1 (fr)
WO (1) WO2018091039A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109735698A (zh) * 2019-01-31 2019-05-10 东北大学 一种高性能中锰trip钢及其低温加工成形的方法
CN113926892A (zh) * 2020-06-29 2022-01-14 宝山钢铁股份有限公司 抗拉强度≥980MPa级热轧超高强度双相钢零件冲压成形工艺及应用
US11511330B2 (en) * 2017-12-25 2022-11-29 Jfe Steel Corporation Method for manufacturing press formed product
EP3408418B1 (fr) * 2017-02-10 2023-05-10 Tata Steel Limited Tôle d'acier haute résistance à deux phases renforcé par dispersion et à affinage de grain laminée à chaud présentant une résistance à la traction minimale de 600 mpa et son procédé

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111218620B (zh) * 2018-11-23 2021-10-22 宝山钢铁股份有限公司 一种高屈强比冷轧双相钢及其制造方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0747496A1 (fr) * 1995-06-08 1996-12-11 Sollac S.A. TÔle d'acier laminée à chaud à haute résistance et haute emboutissabilité renfermant du titane, et ses procédés de fabrication
DE102009049155A1 (de) 2009-10-12 2011-04-28 Bayerische Motoren Werke Aktiengesellschaft Vorrichtung zum Herstellen eines Prüflings aus einem Blechmaterial und Verfahren zur Ermittlung der Kantenrissempfindlichkeit
DE102011121904A1 (de) 2011-12-21 2013-06-27 Volkswagen Aktiengesellschaft Verfahren zur scherenden Bearbeitung von Blechen mit einer anschließenden Umformung sowie ein hierzu bestimmtes Schneidwerkzeug
DE102013104296A1 (de) * 2013-04-26 2014-10-30 Thyssenkrupp Steel Europe Ag Verfahren zur Herstellung eines Fahrwerkbauteils und Fahrwerkbauteil
DE102013114245B3 (de) 2013-12-17 2015-05-21 Thyssenkrupp Ag Verfahren und Vorrichtung zur Herstellung warmumgeformter Radschüsseln
DE102014016614A1 (de) 2014-10-31 2016-05-04 Salzgitter Flachstahl Gmbh Verfahren zur Herstellung eines Bauteils durch Umformen einer Platine aus Stahl

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0747496A1 (fr) * 1995-06-08 1996-12-11 Sollac S.A. TÔle d'acier laminée à chaud à haute résistance et haute emboutissabilité renfermant du titane, et ses procédés de fabrication
DE102009049155A1 (de) 2009-10-12 2011-04-28 Bayerische Motoren Werke Aktiengesellschaft Vorrichtung zum Herstellen eines Prüflings aus einem Blechmaterial und Verfahren zur Ermittlung der Kantenrissempfindlichkeit
DE102011121904A1 (de) 2011-12-21 2013-06-27 Volkswagen Aktiengesellschaft Verfahren zur scherenden Bearbeitung von Blechen mit einer anschließenden Umformung sowie ein hierzu bestimmtes Schneidwerkzeug
DE102013104296A1 (de) * 2013-04-26 2014-10-30 Thyssenkrupp Steel Europe Ag Verfahren zur Herstellung eines Fahrwerkbauteils und Fahrwerkbauteil
DE102013114245B3 (de) 2013-12-17 2015-05-21 Thyssenkrupp Ag Verfahren und Vorrichtung zur Herstellung warmumgeformter Radschüsseln
DE102014016614A1 (de) 2014-10-31 2016-05-04 Salzgitter Flachstahl Gmbh Verfahren zur Herstellung eines Bauteils durch Umformen einer Platine aus Stahl

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
ARCELLORMITTAL: "DualphasenstähleAuszug aus Europäischen Produktangebot -Ausgabe", 14 March 2017 (2017-03-14), XP002778045, Retrieved from the Internet <URL:http://automotive.arcelormittal.com/saturnus/sheets/A1_DE.pdf> *
SALZGITTER FLACHSTAHL: "HCT780C (CR570Y780T-CP1) Mehrphasenstähle zum Kaltumformen - Kaltgewalzte Komplexphasenstähle", May 2015 (2015-05-01), XP002778044, Retrieved from the Internet <URL:https://www.salzgitter-flachstahl.de/fileadmin/mediadb/szfg/informationsmaterial/produktinformationen/feuerverzinkte_produkte/deu/hct780c.pdf> *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3408418B1 (fr) * 2017-02-10 2023-05-10 Tata Steel Limited Tôle d'acier haute résistance à deux phases renforcé par dispersion et à affinage de grain laminée à chaud présentant une résistance à la traction minimale de 600 mpa et son procédé
US11511330B2 (en) * 2017-12-25 2022-11-29 Jfe Steel Corporation Method for manufacturing press formed product
CN109735698A (zh) * 2019-01-31 2019-05-10 东北大学 一种高性能中锰trip钢及其低温加工成形的方法
CN113926892A (zh) * 2020-06-29 2022-01-14 宝山钢铁股份有限公司 抗拉强度≥980MPa级热轧超高强度双相钢零件冲压成形工艺及应用

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