EP3025107B1 - Verfahren zur wärmebehandlung beschichteter stahlhalbzeuge - Google Patents

Verfahren zur wärmebehandlung beschichteter stahlhalbzeuge Download PDF

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Publication number
EP3025107B1
EP3025107B1 EP14741577.2A EP14741577A EP3025107B1 EP 3025107 B1 EP3025107 B1 EP 3025107B1 EP 14741577 A EP14741577 A EP 14741577A EP 3025107 B1 EP3025107 B1 EP 3025107B1
Authority
EP
European Patent Office
Prior art keywords
conveyer
semi
element group
elements
furnace
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.)
Not-in-force
Application number
EP14741577.2A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3025107A1 (de
Inventor
Janko Banik
Maria KÖYER
Georg Parma
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.)
ThyssenKrupp Steel Europe AG
Original Assignee
ThyssenKrupp Steel Europe AG
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 ThyssenKrupp Steel Europe AG filed Critical ThyssenKrupp Steel Europe AG
Priority to PL14741577T priority Critical patent/PL3025107T3/pl
Publication of EP3025107A1 publication Critical patent/EP3025107A1/de
Application granted granted Critical
Publication of EP3025107B1 publication Critical patent/EP3025107B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
    • F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace
    • F27B9/24—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace being carried by a conveyor
    • F27B9/2407—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace being carried by a conveyor the conveyor being constituted by rollers (roller hearth furnace)
    • 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
    • C21D9/0006—Details, accessories not peculiar to any of the following furnaces
    • C21D9/0018—Details, accessories not peculiar to any of the following furnaces for charging, discharging or manipulation of charge
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C30/00—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
    • C23C30/005—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process on hard metal substrates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/02—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity of multiple-track type; of multiple-chamber type; Combinations of furnaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/02—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity of multiple-track type; of multiple-chamber type; Combinations of furnaces
    • F27B9/028—Multi-chamber type furnaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B2009/3094—Means to store a part of the charge in the furnace

Definitions

  • the present invention relates to a method for the heat treatment of coated semi-finished steel products, comprising at least one heatable continuous furnace, with at least one conveyor for the steel semi-finished products, wherein the conveyor has conveying elements and the semi-finished steel in the continuous furnace rest on the conveyor elements.
  • the heat treatment of steel semi-finished products takes place in particular for the purpose of austenitizing to prepare the press-hardening.
  • Austenitmaschine with subsequent press hardening i. the deformation and quenching of the heated to about 800 - 1000 ° C semi-finished steel
  • the formed steel semi-finished product has a martensitic structure, whereby the strength of the formed steel semi-finished product increases significantly.
  • mullite as a ceramic material for the rollers.
  • a liquid to viscous Al-Si layer is formed on the mullite rolls in a heating profile dependent area. Since the Al-Si alloyed during the heat treatment with the iron of the steel semi-finished product, This AlSi layer is formed on the ceramic rollers within a characteristic temperature-time range. Which conveying elements are affected by the adhesions described depends on the one hand, as already described, on the temperature-time profile and on the other hand on the surface material of the conveying elements, which comes into contact with the surface of the steel semi-finished products.
  • zinc alloy coatings for example coatings with a zinc-nickel coating
  • Even those with a zinc-based coated steel semi-finished products must be austenitized to prepare the press-hardening.
  • Both AlSi and zinc-based semi-finished steel products are suitable for direct press hardening.
  • direct press hardening a blank is punched out of a coil and fed to the heat treatment without pre-deformation.
  • indirect method a blank is punched out of a coil, then cold-worked and then the preformed component is also fed to the heat treatment for the purpose of austenitizing.
  • intensive contact between the surface of the board and the conveying elements of the device for heat treatment occurs during transport of the planar board.
  • the preformed components are usually transported on workpiece carriers during the heat treatment in the indirect process for the purpose of austenitizing. Thus, there is usually no contact between the coated semi-finished steel product and the conveying elements.
  • the present invention is therefore based on the object, the known method for heat treatment of coated semi-finished steel in such a way and further develop that during direct press hardening alternately campaigns with AlSi-coated steel semi-finished, zinc-based steel semi-finished products and / or further suitable for the heat transformation coating systems on organic or inorganic base, without this resulting in adverse effects on press hardening and without the press-hardened products are impaired.
  • the previously derived and indicated object is achieved in that at least one decoupling section of the continuous furnace has at least two conveying element groups, each conveying element group has at least one conveying element and the semi-finished steel lies in the decoupling section either on the conveying elements of the first conveying element group or the conveying elements of the second conveying element group.
  • coated steel semi-finished products rest on the conveying elements of the first conveyor element group and rest with a further coating system on organic or inorganic base coated semi-finished steel products that are suitable for hot forming on the conveying elements of the second conveyor element group.
  • the conveying elements are designed according to a first alternative as rollers. These transport rollers are largely proven and reliable.
  • the conveying elements are designed as a semifinished product carrier connected to a transport chain.
  • This embodiment makes it possible in a guide of the semi-finished carrier by a slot in the Oven wall to arrange the moving parts, ie essentially the transport chain outside the high temperature range.
  • first conveyor element group are arranged in a first furnace chamber of the decoupling section and the second conveyor element group in a second furnace chamber of the decoupling, it is ensured that, for example, during operation of the first furnace chamber, the second furnace chamber of a maintenance, in particular a cleaning of the conveying elements can be subjected.
  • Decoupling can be ensured in a particularly unproblematic way by virtue of the fact that, in a furnace chamber of the decoupling section, the first conveyor element group is designed as a first roller conveyor and the second conveyor element group as a second roller conveyor. This ensures a very compact arrangement of the decoupled conveyor element groups.
  • At least one furnace chamber of the continuous furnace is height-adjustable and / or laterally adjustable.
  • the roller tracks are aligned by appropriate adjustment of the oven chamber to the other sections of the continuous furnace.
  • a furnace switch is arranged before and / or after the decoupling section. With the help of this furnace turn a potentially complex partial or complete operation of the furnace chamber can be reduced or avoided.
  • the conveyor elements arranged in a furnace chamber are arranged, for example, height-adjustable or laterally adjustable.
  • the decoupling according to the invention can be ensured without height adjustment of a furnace chamber or the use of a furnace switch.
  • this relative height adjustment for example, every second roller in a roller conveyor or every second semi-carrier connected to a transport chain can be lowered in the change of the campaigns within the decoupling section. These rollers then come with the semi-finished steel not in touch.
  • the method according to the invention is further configured in that the continuous furnace has a homogenization section following the decoupling section in the conveying direction.
  • the alloying of, for example, AlSi coating into the material of the steel semifinished product results in any case that the essential part of the homogenization takes place in a region in which, for example, AlSi deposits on the conveying elements are to be feared.
  • the joint use of the homogenization section both for campaigns with, for example, AlSi-coated components and, for example, zinc-based coated components and / or further suitable for hot forming coating systems on an organic or inorganic basis leads to reduced system costs.
  • a timely transfer of the austenitic steel semi-finished products is ensured by an exit area of the continuous furnace is assigned to a forming press.
  • a forming press When transferring the semi-finished steel products to the forming press, it is crucial that the heated steel semi-finished products enter the press in a defined state and are subsequently press-hardened. This is ensured by a direct assignment of the output range of the continuous furnace to a forming press.
  • the schematic diagram of a device for heat treatment of coated steel semi-finished products 1 has an in Fig. 1 only indicated continuous furnace 2 on. Shown here is a conveyor 3 for the semi-finished steel products 1, which has rollers 4 as conveying elements. As can be seen, the semi-finished steel products 1, which are austenitizing as direct products for direct press hardening and designed as blanks, rest on the rollers 4 in the continuous furnace.
  • a decoupling section 5 of the continuous furnace 2 has two conveyor element groups 6, 7.
  • each of the conveyor element groups 6, 7 has a plurality of conveyor elements designed as rollers 4 and the semi-finished steel 1 is located in the decoupling section 5 either on the conveyor elements of the first conveyor element group 6 or the conveyor elements of the second conveyor element group 7.
  • Fig. 1 schematically shows that the decoupling section 5 is arranged in the temperature-time range in which, for example, AlSi coating already liquefied (AlSi lq ), ie no longer in the original solid state (AlSi sol ) and has not yet been alloyed by the high temperatures in the material of the steel semi-finished product 1 (AlSi leg ).
  • the first conveying element group 6 is arranged in a first furnace chamber 8 of the decoupling section 5 and the second conveying element group 7 is arranged in a second furnace chamber 9 of the decoupling section 5.
  • the first conveyor element group 6 and the second conveyor element group 7 each designed as superimposed roller tables.
  • the semifinished steel products 1 are transferred to a homogenization section 11, the output region of which is assigned a forming press 12, which is likewise shown schematically.
  • furnace chamber 10 is adjustable in height, whereby the transfer of the steel semi-finished products 1 is guaranteed without separate furnace switch.
  • the press-hardened workpiece 13 is shown in the forming press 12.
EP14741577.2A 2013-07-22 2014-07-16 Verfahren zur wärmebehandlung beschichteter stahlhalbzeuge Not-in-force EP3025107B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL14741577T PL3025107T3 (pl) 2013-07-22 2014-07-16 Sposób obróbki cieplnej powlekanych półfabrykatów stalowych

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201310107777 DE102013107777A1 (de) 2013-07-22 2013-07-22 Vorrichtung zur Wärmebehandlung beschichteter Stahlhalbzeuge
PCT/EP2014/065304 WO2015011002A1 (de) 2013-07-22 2014-07-16 Vorrichtung zur wärmebehandlung beschichteter stahlhalbzeuge

Publications (2)

Publication Number Publication Date
EP3025107A1 EP3025107A1 (de) 2016-06-01
EP3025107B1 true EP3025107B1 (de) 2017-06-14

Family

ID=51211760

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14741577.2A Not-in-force EP3025107B1 (de) 2013-07-22 2014-07-16 Verfahren zur wärmebehandlung beschichteter stahlhalbzeuge

Country Status (8)

Country Link
US (1) US10041733B2 (zh)
EP (1) EP3025107B1 (zh)
CN (1) CN105408715B (zh)
DE (1) DE102013107777A1 (zh)
ES (1) ES2640390T3 (zh)
MX (1) MX2016000401A (zh)
PL (1) PL3025107T3 (zh)
WO (1) WO2015011002A1 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3153594B1 (en) * 2014-06-06 2021-09-01 Nippon Steel & Sumikin Texeng. Co., Ltd. Far-infrared multistage heating furnace for hot-pressed steel plate

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5885522A (en) * 1996-09-12 1999-03-23 Midland Steel Products Co. Method and apparatus for heat treating and straightening structural members
JP2000051920A (ja) * 1998-08-10 2000-02-22 Sumitomo Metal Ind Ltd 連続化熱間圧延設備
ATE553344T1 (de) * 2006-03-03 2012-04-15 Schwartz Eva Mehrkammer-durchlaufofen mit schutzgasbetrieb und verfahren zum oxidfreien erwärmen von verzinkten werkstücken
DE102006020781B3 (de) * 2006-05-03 2007-11-22 Benteler Automobiltechnik Gmbh Ofen
DE102009026251A1 (de) * 2009-07-24 2011-02-03 Thyssenkrupp Steel Europe Ag Verfahren und Vorrichtung zum energieeffizienten Warmumformen
DE102010017354A1 (de) 2010-06-14 2011-12-15 Thyssenkrupp Steel Europe Ag Verfahren zum Herstellen eines warmgeformten und gehärteten, mit einer metallischen Korrosionsschutzbeschichtung überzogenen Stahlbauteils aus einem Stahlflachprodukt
DE102011051270A1 (de) 2011-06-22 2012-12-27 Benteler Automobiltechnik Gmbh Rolle für einen Rollenofen sowie Rollenofen und Verfahren zur Herstellung einer Rolle für einen Rollenofen
DE102012110649C5 (de) * 2012-11-07 2018-03-01 Benteler Automobiltechnik Gmbh Warmformlinie sowie Verfahren zur Herstellung eines warmumgeformten und pressgehärteten Kraftfahrzeugbauteils

Also Published As

Publication number Publication date
WO2015011002A1 (de) 2015-01-29
ES2640390T3 (es) 2017-11-02
CN105408715A (zh) 2016-03-16
DE102013107777A1 (de) 2015-01-22
PL3025107T3 (pl) 2017-11-30
CN105408715B (zh) 2017-09-08
US20160195332A1 (en) 2016-07-07
EP3025107A1 (de) 2016-06-01
US10041733B2 (en) 2018-08-07
MX2016000401A (es) 2016-04-20

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