EP3017888B1 - Outil de déformation à chaud - Google Patents

Outil de déformation à chaud Download PDF

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Publication number
EP3017888B1
EP3017888B1 EP14197507.8A EP14197507A EP3017888B1 EP 3017888 B1 EP3017888 B1 EP 3017888B1 EP 14197507 A EP14197507 A EP 14197507A EP 3017888 B1 EP3017888 B1 EP 3017888B1
Authority
EP
European Patent Office
Prior art keywords
relief
tool
raised
base body
metal
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.)
Revoked
Application number
EP14197507.8A
Other languages
German (de)
English (en)
Other versions
EP3017888A1 (fr
Inventor
Hua Guo
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.)
Individual
Original Assignee
Individual
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=52278347&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP3017888(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Individual filed Critical Individual
Priority to KR1020177013758A priority Critical patent/KR20170086519A/ko
Priority to PCT/EP2015/075758 priority patent/WO2016071423A1/fr
Priority to RU2017118964A priority patent/RU2687321C2/ru
Priority to JP2017522549A priority patent/JP2017536237A/ja
Priority to CN201580060124.1A priority patent/CN107206442B/zh
Priority to BR112017007858-9A priority patent/BR112017007858A2/pt
Priority to US15/519,988 priority patent/US20170333964A1/en
Publication of EP3017888A1 publication Critical patent/EP3017888A1/fr
Publication of EP3017888B1 publication Critical patent/EP3017888B1/fr
Application granted granted Critical
Revoked legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B19/00—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
    • B21B19/02—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling ; Diescher mills, Stiefel disc piercers or Stiefel rotary piercers
    • B21B19/04—Rolling basic material of solid, i.e. non-hollow, structure; Piercing, e.g. rotary piercing mills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B25/00—Mandrels for metal tube rolling mills, e.g. mandrels of the types used in the methods covered by group B21B17/00; Accessories or auxiliary means therefor ; Construction of, or alloys for, mandrels or plugs

Definitions

  • the invention is in the field of manufacturing tubular metal workpieces and relates to forming tools, especially piercing mandrels, forged mandrels and billets with improved stability.
  • Seamless steel tubes are generally manufactured in three forming steps on respective rolling mills by hot forming.
  • a massive steel block heated to about 1200 ° C. is shaped to form a hollow block by means of an internal tool, the piercing mandrel, on a so-called perforated piercing mill.
  • the block is driven by means of inclined rollers on the piercer.
  • the hollow block is reduced in a longitudinal rolling process over the inner tool, a rolling rod, in diameter and wall thickness and stretched in the longitudinal direction.
  • the rolling stock is converted to the required dimensions in diameter and wall thickness, with no internal tool is usually used.
  • the inner tools in the first two forming stages are exposed to high temperatures and high mechanical pressures during production.
  • the inner tools are made of heat-resistant steel.
  • successive heating of the inner tool is often unavoidable.
  • the strength of the tool decreases and the tool can then no longer withstand the mechanical loads.
  • the tool deforms and breaks.
  • piercing mandrels are provided with natural scale layers. These scale layers inhibit the heat flow from the forming material into the tool and protect the tool against rapid heating and rapid loss of strength. When forming higher alloyed materials, however, the scale layer is quickly removed and thermal protection fails.
  • the service life of the tools could be improved if the thickness of the oxide layer could be increased. Then the heat insulation would be better and with abrasive wear the protective layer would remain longer.
  • the protective layer which is naturally formed from the base material by conversion into iron oxides, does not have high stability. It is brittle and porous and can therefore easily be destroyed by mechanical and thermal stress. Therefore, these protective layers are limited in their thickness. The limit of the layer is about 0.8 mm. The protective effect of such a layer is therefore limited accordingly. Heat therefore penetrates into the body of the tool and reduces its strength, which then leads to premature failure of the tool. For highly alloyed products, the abrasion is relatively fast, i. after a small length of rolled material for removal of the protective layer.
  • EP 2 404 680 A refers to a hot forming tool, such as a piercer, which is thermally coated.
  • the coating is performed by ASD ("arc spray deposition"), a thermal coating process in which the metal is vaporized in the arc and then deposited on the substrate. Specifically, an iron thread is brought into the arc and evaporated there. After this application discloses a smooth surface.
  • the object of the present has therefore been to provide hot forming tools with improved stability, which are free from the above-described Disadvantages are.
  • these tools should have a higher strength oxide layer which, moreover, can be applied easily and without material loss.
  • a first subject of the invention relates to a hot forming tool consisting of a tool base body with at least partial surface coating, which is obtainable by adding material to the base body, which forms a raised metallic relief and wherein the raised metallic relief then completely or partially oxidized and in a protective layer is converted.
  • the hot forming tools of the present invention are preferably a piercer or a forging mandrel, which are typically steel.
  • the invention fundamentally also encompasses any other metallic workpiece in which the base body is to be protected against heat flow.
  • the term metal is not limited to iron and steel, but also includes other metallic materials including metal-containing composites that are to be subjected to hot working.
  • the surface coating according to the invention can be advantageously applied become.
  • the internal tools in the rolling mills with a plurality of rolling mills arranged one behind the other in the second forming stage particular care must be taken to ensure that the friction between the tool and the rolling stock is low. Therefore, the surface layer according to the invention must be ground and polished for this application.
  • An additional layer, for example of chromium, can also be applied to the protective layer according to the invention.
  • the raised relief which is applied to the base body, can be pronounced differently, the alternative embodiments are all in principle suitable to fulfill the task fully.
  • the raised relief may simply be a wrapping of the base body with a wire, preferably a steel wire.
  • the raised relief may be a metal mesh or metal net applied to the base.
  • the metallic bodies applied to the surface of the tool preferably consist of a steel mesh, for example with a steel wire thickness of about 1 to about 5 mm and preferably about 1.5 mm and a mesh size of about 1 to 5 mm and in particular about 2.5 mm.
  • Mesh size is the distance between the center lines of two adjacent fabric elements.
  • the raised relief may be an irregular coating as achieved by chemical or physical vapor deposition of metal.
  • the application of the raised relief can be done according to very different - simple and complex - method, but all solve the task of the invention fully.
  • the basic body is simply wrapped with a wire, preferably a metal wire.
  • a metal mesh or a metal mesh is used instead of the wire. This can be preformed, for example by deformation to the shape of the tool and then mounted on the body. To increase the strength, it is advisable to weld the wire winding or the metal mesh to the base body.
  • chemical vapor deposition refers to a group of coating processes which are used inter alia in the production of microelectronic components and optical waveguides.
  • a solid component is deposited due to a chemical reaction from the gas phase.
  • volatile compounds of Layer components exist which deposit the solid layer at a certain reaction temperature.
  • the process of chemical vapor deposition is characterized by at least one reaction on the surface of the workpiece to be coated. At least one gaseous starting compound (starting material) and at least two reaction products - at least one of which in the solid phase - must be involved in this reaction.
  • starting material At least one gaseous starting compound (starting material) and at least two reaction products - at least one of which in the solid phase - must be involved in this reaction.
  • the process is preferably carried out at reduced pressure.
  • the preferred PVD converts the feedstock into the gas phase.
  • the gaseous material is then passed to the substrate to be coated, where it condenses and forms the target layer.
  • Examples include classical evaporation methods, such as thermal evaporation, electron beam evaporation or laser beam evaporation (Pulsed Laser Deposition).
  • sputtering is preferred in which the starting material is atomized by ion bombardment and transferred into the gas phase, from which it can then be deposited again onto the base body. All these methods have in common that the material to be deposited is present in solid form in the most evacuated coating chamber.
  • the target By bombardment with laser beams, magnetically deflected ions or electrons as well as by arc discharge, the target is vaporized.
  • the amount of atoms, ions or larger clusters in the vapor varies from process to process.
  • the vaporized material moves either ballistically or by electric fields guided through the chamber and strikes the parts to be coated, where it comes to film formation.
  • Typical working pressures are in the range of 10 -4 Pa to about 10 Pa.
  • areas that are invisible from the location of the vapor source are coated at a lower coating rate.
  • unlike usual is dispensed with a rotation of the substrate.
  • a fourth alternative embodiment for the formation of relief comprises the so-called thermal spraying.
  • This filler materials, the so-called spray additives inside or outside of a spray burner off, on or melted, accelerated in a gas stream in the form of spray particles and thrown onto the surface of the component to be coated.
  • the component surface is not melted (in contrast to build-up welding) and only subjected to a low thermal load.
  • a layer formation takes place because the spray particles flatten more or less depending on the process and material when hitting the component surface, stick primarily by mechanical clamping and layer by layer build up the spray layer.
  • Quality features of sprayed coatings are low porosity, good adhesion to the component, freedom from cracks and homogeneous microstructure.
  • the achieved coating properties are significantly influenced by the temperature and the speed of the spray particles at the time of their impact on the surface to be coated.
  • the surface condition purity, activation, temperature
  • the surface condition also has a significant influence on quality features such as adhesion.
  • the base body can be coated not only with metals but also with oxide-ceramic materials and carbide materials (or in general composite materials).
  • the coating is carried out with an iron / ceramic mixture.
  • the body is preferably made of steel
  • the requirement for the material forming the raised relief is that it be at least partially capable of forming an oxide layer.
  • this is iron or steel, so that an iron oxide layer, preferably scale is produced.
  • a mixture of iron / steel and ceramics may also be used, for example in a weight ratio of about 20:80 to about 80:20.
  • the relief can have a variety of forms, ranging from regular (round, square, etc.) to any free-form.
  • Material composites can also be used, i.
  • a molybdenum fabric which is applied to the body made of steel.
  • the fabric element may also consist of a composite of hard chrome steel (inside) and good oxidizable steel (outside).
  • spacers and combustible materials can be used. It is also possible to store ceramic for better thermal insulation.
  • the complete or partial conversion of the metallic relief into an oxide protective layer can be carried out by known processes of the prior art, for example by flame spraying, plasma spraying or by a thermochemical process.
  • oxide is also formed in the interstices between the bodies, for example, between the tool body and the applied steel mesh and within the mesh of the steel mesh.
  • the result is a particularly thick protective layer reinforced by internal bodies.
  • the layer thickness is not limited to a few millimeters. Layer thicknesses of 10 millimeters and more can be produced without difficulty and at low cost.
  • Another object of the invention relates to the use of the new tool described in detail above, especially as a piercer, forging mandrel or roll bar for the production of seamless tubes or for hot forging tubular metal workpieces.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Forging (AREA)
  • Chemical Vapour Deposition (AREA)

Claims (15)

  1. Outil de formage à chaud (1) comprenant un corps de base d'outil (2, 6) pourvu d'un revêtement de surface au moins partiel (4) pouvant être obtenu en ajoutant au corps de base une matière qui forme un relief métallique saillant, le relief métallique saillant étant ensuite totalement ou partiellement oxydé et transformé en une couche protectrice.
  2. Outil selon la revendication 1, caractérisé en ce qu'il s'agit d'un mandrin, d'un mandrin de forgeage ou d'une barre de laminage.
  3. Outil selon les revendications 1 et / ou 2, caractérisé en ce que le corps de base est en métal, de préférence en acier.
  4. Outil selon l'une au moins des revendications 1 à 3, caractérisé en ce que le relief saillant sur le corps de base est un enroulement de fil métallique.
  5. Outil selon l'une au moins des revendications 1 à 3, caractérisé en ce que le relief saillant sur le corps de base est un tissu métallique.
  6. Procédé de fabrication d'un outil de formage à chaud comprenant un corps d'outil pourvu d'un revêtement de surface au moins partiel,
    (a) le corps de base étant pourvu d'un relief métallique saillant, et
    (b) puis le relief métallique étant complètement ou partiellement oxydé et transformé en une couche protectrice.
  7. Procédé selon la revendication 6, caractérisé en ce que le relief saillant est appliqué sur le corps par enroulement d'un fil métallique.
  8. Procédé selon la revendication 6, caractérisé en ce que le relief saillant est appliqué sur le corps de base par enrobage d'un tissu métallique.
  9. Procédé selon la revendication 8, caractérisé en ce que le tissu métallique est préformé par déformation de l'outil puis par traction sur le corps de base.
  10. Procédé selon l'une au moins des revendications 7 à 9, caractérisé en ce que le fil métallique ou le tissu métallique est soudé au corps de base.
  11. Procédé selon la revendication 6, caractérisé en ce que le relief saillant est appliqué sur le corps de base par dépôt chimique/physique en phase vapeur.
  12. Procédé selon la revendication 6, caractérisé en ce que le relief saillant est appliqué sur le corps de base par projection thermique.
  13. Procédé selon l'une au moins des revendications 6 à 12, caractérisé en ce que le corps de base est en métal, de préférence en acier, et le matériau qui forme le relief saillant est capable au moins en partie de former une couche d'oxyde.
  14. Procédé selon l'une au moins des revendications 6 à 13, caractérisé en ce que la transformation complète ou partielle du relief métallique en une couche protectrice d'oxyde est effectuée par projection à la flamme, par projection au plasma ou par un procédé thermochimique.
  15. Utilisation d'un outil selon l'une au moins des revendications 1 à 5 destinée à la fabrication de tubes sans soudure ou au forgeage à chaud de pièces tubulaires en métal.
EP14197507.8A 2014-11-07 2014-12-11 Outil de déformation à chaud Revoked EP3017888B1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
CN201580060124.1A CN107206442B (zh) 2014-11-07 2015-11-04 热成型工具
PCT/EP2015/075758 WO2016071423A1 (fr) 2014-11-07 2015-11-04 Outil de formage à chaud
RU2017118964A RU2687321C2 (ru) 2014-11-07 2015-11-04 Инструмент для горячего формообразования
JP2017522549A JP2017536237A (ja) 2014-11-07 2015-11-04 熱間成形工具
KR1020177013758A KR20170086519A (ko) 2014-11-07 2015-11-04 열 성형 툴
BR112017007858-9A BR112017007858A2 (pt) 2014-11-07 2015-11-04 ferramenta de formação a quente
US15/519,988 US20170333964A1 (en) 2014-11-07 2015-11-04 Hot forming tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014016502.7A DE102014016502A1 (de) 2014-11-07 2014-11-07 Warmumformwerkzeug mit verstärkter Oxid-Schutzschicht

Publications (2)

Publication Number Publication Date
EP3017888A1 EP3017888A1 (fr) 2016-05-11
EP3017888B1 true EP3017888B1 (fr) 2019-04-24

Family

ID=52278347

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14197507.8A Revoked EP3017888B1 (fr) 2014-11-07 2014-12-11 Outil de déformation à chaud

Country Status (9)

Country Link
US (1) US20170333964A1 (fr)
EP (1) EP3017888B1 (fr)
JP (1) JP2017536237A (fr)
KR (1) KR20170086519A (fr)
CN (1) CN107206442B (fr)
BR (1) BR112017007858A2 (fr)
DE (1) DE102014016502A1 (fr)
RU (1) RU2687321C2 (fr)
WO (1) WO2016071423A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018116238A1 (de) * 2018-07-04 2020-01-09 Kme Germany Gmbh & Co. Kg Warmumformwerkzeug und Verfahren zur Herstellung eines Warmumformwerkzeuges

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3048691A1 (de) 1979-12-25 1981-09-24 Nippon Kokan K.K., Tokyo Lochdorn zur verwendung in stopfen- und streckwalzwerken
EP0385439A1 (fr) 1989-02-28 1990-09-05 Nkk Corporation Mandrin pour la fabrication d'un tube d'acier
JP2002224713A (ja) 2001-01-31 2002-08-13 Kawasaki Steel Corp 穿孔圧延用工具の表面保護材およびその製造方法
DE102011010646A1 (de) 2010-03-02 2011-09-08 Sms Meer Gmbh Warmwerkzeug und Verfahren zu seiner Herstellung
EP2404680A1 (fr) 2009-03-03 2012-01-11 Sumitomo Metal Industries, Ltd. Bouchon, appareil de laminage/poinçonnage et procédé de fabrication de tube sans soudure l'utilisant
WO2014041787A1 (fr) 2012-09-11 2014-03-20 Ｊｆｅスチール株式会社 Bouchon pour le laminage d'un tuyau d'acier sans soudure, procédé de fabrication dudit bouchon et procédé de fabrication d'un tuyau d'acier sans soudure dans lequel ledit bouchon est utilisé
WO2014109180A1 (fr) 2013-01-11 2014-07-17 新日鐵住金株式会社 Bouchon pour fabrication de tube à chaud

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU818684A1 (ru) * 1979-05-14 1981-04-07 Челябинский Ордена Ленина Трубо-Прокатный Завод Способ изготовлени оправок
JP3015389B2 (ja) * 1989-07-31 2000-03-06 株式会社東芝 超電導コイルの製造方法
SU1773525A1 (en) * 1990-07-31 1992-11-07 Dn Truboprokatnyj Z Im Pipe drawing mandrel
CN1041497C (zh) * 1992-08-06 1999-01-06 周春林 金属管轧机用顶头及制备方法
DE102008056988A1 (de) 2007-12-07 2009-06-10 Sms Meer Gmbh Verfahren und Walzwerk zum Herstellen von nahtlosen Stahlrohren
CN102002710A (zh) * 2010-12-30 2011-04-06 两仪激光技术（天津）有限公司 一种激光表面熔覆工艺熔覆层裂纹控制方法

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3048691A1 (de) 1979-12-25 1981-09-24 Nippon Kokan K.K., Tokyo Lochdorn zur verwendung in stopfen- und streckwalzwerken
EP0385439A1 (fr) 1989-02-28 1990-09-05 Nkk Corporation Mandrin pour la fabrication d'un tube d'acier
JP2002224713A (ja) 2001-01-31 2002-08-13 Kawasaki Steel Corp 穿孔圧延用工具の表面保護材およびその製造方法
EP2404680A1 (fr) 2009-03-03 2012-01-11 Sumitomo Metal Industries, Ltd. Bouchon, appareil de laminage/poinçonnage et procédé de fabrication de tube sans soudure l'utilisant
DE102011010646A1 (de) 2010-03-02 2011-09-08 Sms Meer Gmbh Warmwerkzeug und Verfahren zu seiner Herstellung
WO2014041787A1 (fr) 2012-09-11 2014-03-20 Ｊｆｅスチール株式会社 Bouchon pour le laminage d'un tuyau d'acier sans soudure, procédé de fabrication dudit bouchon et procédé de fabrication d'un tuyau d'acier sans soudure dans lequel ledit bouchon est utilisé
EP2873468A1 (fr) 2012-09-11 2015-05-20 JFE Steel Corporation Bouchon pour le laminage d'un tuyau d'acier sans soudure, procédé de fabrication dudit bouchon et procédé de fabrication d'un tuyau d'acier sans soudure dans lequel ledit bouchon est utilisé
WO2014109180A1 (fr) 2013-01-11 2014-07-17 新日鐵住金株式会社 Bouchon pour fabrication de tube à chaud
EP2944387A1 (fr) 2013-01-11 2015-11-18 Nippon Steel & Sumitomo Metal Corporation Bouchon pour fabrication de tube à chaud

Also Published As

Publication number Publication date
BR112017007858A2 (pt) 2018-01-16
RU2017118964A3 (fr) 2018-12-07
WO2016071423A1 (fr) 2016-05-12
RU2017118964A (ru) 2018-12-07
US20170333964A1 (en) 2017-11-23
JP2017536237A (ja) 2017-12-07
CN107206442B (zh) 2020-04-07
EP3017888A1 (fr) 2016-05-11
DE102014016502A1 (de) 2016-05-12
KR20170086519A (ko) 2017-07-26
RU2687321C2 (ru) 2019-05-13
CN107206442A (zh) 2017-09-26

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