EP0472546B1 - Procede pour fabriquer des lingots creux plaques - Google Patents

Procede pour fabriquer des lingots creux plaques Download PDF

Info

Publication number
EP0472546B1
EP0472546B1 EP90906879A EP90906879A EP0472546B1 EP 0472546 B1 EP0472546 B1 EP 0472546B1 EP 90906879 A EP90906879 A EP 90906879A EP 90906879 A EP90906879 A EP 90906879A EP 0472546 B1 EP0472546 B1 EP 0472546B1
Authority
EP
European Patent Office
Prior art keywords
accordance
core
molten
plating
hollow body
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.)
Expired - Lifetime
Application number
EP90906879A
Other languages
German (de)
English (en)
Other versions
EP0472546A1 (fr
Inventor
Ingo Von Hagen
Christoph Prasser
Fritz P. Pleschiutschnigg
Lothar Parschat
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.)
Vodafone GmbH
Original Assignee
Mannesmann 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 Mannesmann AG filed Critical Mannesmann AG
Publication of EP0472546A1 publication Critical patent/EP0472546A1/fr
Application granted granted Critical
Publication of EP0472546B1 publication Critical patent/EP0472546B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/26—After-treatment
    • C23C2/28—Thermal after-treatment, e.g. treatment in oil bath
    • C23C2/29—Cooling or quenching
    • 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
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/006—Pattern or selective deposits
    • 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
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • 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
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
    • C23C2/36—Elongated material
    • C23C2/38—Wires; Tubes

Definitions

  • the invention relates to a method for producing clad hollow blocks for further processing into seamless metal tubes, in particular steel tubes, clad on the inside by hot or cold forming.
  • the production of internally clad seamless steel tubes has hitherto generally been carried out in such a way that a hollow block composed of the carrier material and the cladding material is formed into a tube by extrusion.
  • the feed material is prepared for this purpose in such a way that a cylindrical block made of a carrier material (eg low-alloy steel) is first drilled out in the axial direction, so that a hollow block is formed.
  • the two nested hollow blocks are welded together in such a way that the annular gap between the two hollow blocks is tightly sealed, so that the contact surfaces of the hollow blocks do not oxidize when heated to the extrusion temperature and prevent a perfect connection between the carrier material and the plating material.
  • the invention is therefore based on the object of specifying a method with which a hollow block clad only on the inside can be produced and which avoids the shortcomings indicated.
  • the solution according to the invention provides that the molten carrier material is applied to the outside of the solid plating material. This ensures from the outset that the inner plating layer cannot detach from the outer layer as a result of thermal shrinkage, since the latter in any case tends to shrink more because of its higher initial temperature and thus practically shrinks onto the plating layer.
  • the cylindrical hollow body used for the crystallization of the layer of the carrier material could be produced, for example, by hot-forming a corresponding block in a hole press and, if necessary, can be mechanically machined inside and outside before use in the melt of the carrier material, in order to have clean and smooth surfaces to achieve.
  • the sealing of the inner surface of this hollow body during immersion in the melt of the carrier material can e.g. can be achieved by sealing cap.
  • a cylindrical core for this purpose, which lies closely against the inner surface of the hollow body.
  • the core is already used with particular advantage for the production of the cylindrical hollow body by immersing it in a melt of the plating material and allowing the required layer of the plating material to crystallize.
  • the core must consist of a sufficiently heat-resistant material, e.g. from a mild steel.
  • the heat resistance only has to allow the core to be immersed in the melt for the required time without melting itself.
  • the core must be provided on its outer surface with a separating layer effective against the melt.
  • a layer of rust or scale can suffice. This prevents a direct connection between the cladding material and the material of the core and enables the core to be pulled out of the hollow body.
  • the possible dwell time of the steel core in the plating melt depends on its heat absorption capacity if no separate internal cooling of the core is provided.
  • immersion in the melt can also be carried out in partial steps, intermediate cooling being inserted before the next immersion in the melt. This procedure is possible both in the production of the plating layer and in the production of the carrier layer.
  • the chosen immersion time in the manufacture of the hollow block led on the one hand to the greatest possible growth rate of the support material St37 and on the other hand to a very good connection between the plating layer and the support material.
  • the hollow block produced was then hot pressed in a known manner in an extruder to form a seamless steel tube of approximately 21 m in length with an outer diameter of 80 mm and a wall thickness of 10 mm.
  • the plating layer had a thickness of about 2 mm and was perfectly connected to the carrier material.
  • a hollow block of 250 mm outer diameter, 60 mm inner diameter, a plating layer thickness of approximately 25 mm and again approximately 1 m long was to be produced and formed into a seamless tube, the procedure according to claim 3 being chosen for the plating fraction.
  • a rod made of St37 with an outer diameter of 60 mm, which was covered with a scale layer was immersed in a melt of material 1.4301 heated to 30 K above the liquidus temperature. The rod was pulled out of the melt after a dipping time of approximately 35 seconds, during which a plating layer of approximately 17 mm had formed on the surface.
  • the rod provided with the plating layer 25 mm thick was then immersed in a melt of St37 heated to 20 K above the liquidus temperature in accordance with the first exemplary embodiment.
  • a block with an outer diameter of 236 mm had formed.
  • a last dipping process of 53 seconds was carried out.
  • the rod from St37 used as the immersion core was pulled out of the hollow block on a pull-out device. Because of the scale layer on the rod acting as a separating layer, this separation could be carried out without difficulty.
  • the outer surface of the block was then smoothed while still warm.
  • the inner surface (plating layer) of the hollow block was also subjected to a smoothing and cleaning action in order to eliminate the irregularities caused by the scale layer.
  • the block was then again hot-formed in an extrusion press to form a seamless tube. With an outer diameter of 80 mm, an inner diameter of 30 mm, the tube length was over 20 m and the thickness of the plating layer was 1.6 mm. The connection between the two layers was again perfect.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Coating With Molten Metal (AREA)
  • Laminated Bodies (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Chemically Coating (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • ing And Chemical Polishing (AREA)
  • Electroplating Methods And Accessories (AREA)

Claims (9)

  1. Procédé pour fabriquer des blocs creux plaqués pour le traitement ultérieur en tubes d'acier sans soudure plaqués par plongée unique ou multiple d'un corps tubulaire dans un bain de fusion,
    caractérisé en ce que, pour fabriquer des blocs creux pour le traitement ultérieur en tubes plaqués sur la face interne, un corps creux cylindrique formé à partir de la matière de plaquage est plongé dans un bain de fusion d'une matière de support et, après cristallisation d'une couche de support suffisamment épaisse, il est retiré du bain de fusion, la surface interne du corps creux étant protégée, pendant la plongée, contre une entrée du bain de fusion.
  2. Procédé selon la revendication 1,
    caractérisé en ce que la protection contre l'entrée du bain de fusion est effectuée par un noyau cylindrique se trouvant dans le corps creux, lequel s'appuie de façon étanche sur la surface interne, et en ce que le noyau est retiré du bloc creux après achèvement de la cristallisation.
  3. Procédé selon la revendication 2,
    caractérisé en ce que le corps creux est engendré en ce que le noyau en forme de barre, constitué d'une matière résistant à la chaleur, qui est muni d'une couche de séparation, est plongé dans un bain de fusion de la matière de plaquage et, après cristallisation d'une couche de plaquage suffisamment épaisse, il est retiré du bain de fusion de la matière de plaquage.
  4. Procédé selon la revendication 2 ou 3,
    caractérisé en ce que la cristallisation de la couche de la matière de plaquage et/ou de la couche de la matière de support est effectuée, à chaque fois, en au moins deux étapes partielles, en ce que le corps creux ou le bloc creux est à chaque fois retiré du bain de fusion, après un temps de séjour prédéfini, et est refroidi de façon intermédiaire, avant qu'il soit à nouveau plongé dans ce bain de fusion pour faire encore croître la couche cristallisée.
  5. Procédé selon la revendication 3 ou 4,
    caractérisé en ce que la surface du noyau muni de la matière de plaquage est polie avant d'être plongée dans le bain de fusion de la matière de support.
  6. Procédé selon une des revendications 1 à 5,
    caractérisé en ce que la surface de la matière de support cristallisée est polie avant le traitement ultérieur du bloc creux.
  7. Procédé selon la revendication 5 ou 6,
    caractérisé en ce que le polissage est effectué par polissage au laminoir.
  8. Procédé selon une des revendications 3 à 7,
    caractérisé en ce que le noyau, pendant la plongée dans le bain de fusion de la matière de plaquage et/ou de la matière de support, est refroidi intérieurement par un courant de fluide de refroidissement.
  9. Procédé selon une des revendications 3 à 8,
    caractérisé en ce que la surface interne du bloc creux, après le retrait du noyau, est nettoyée et polie, avant d'effectuer la déformation en tube.
EP90906879A 1989-05-16 1990-05-08 Procede pour fabriquer des lingots creux plaques Expired - Lifetime EP0472546B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE3916114 1989-05-16
DE3916114 1989-05-16
PCT/DE1990/000335 WO1990014446A1 (fr) 1989-05-16 1990-05-08 Procede pour fabriquer des lingots creux plaques

Publications (2)

Publication Number Publication Date
EP0472546A1 EP0472546A1 (fr) 1992-03-04
EP0472546B1 true EP0472546B1 (fr) 1994-12-14

Family

ID=6380841

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90906879A Expired - Lifetime EP0472546B1 (fr) 1989-05-16 1990-05-08 Procede pour fabriquer des lingots creux plaques

Country Status (10)

Country Link
US (1) US5232740A (fr)
EP (1) EP0472546B1 (fr)
JP (1) JP2925093B2 (fr)
KR (1) KR930010337B1 (fr)
CN (1) CN1028847C (fr)
AT (1) ATE115643T1 (fr)
BR (1) BR9007180A (fr)
CA (1) CA2033079C (fr)
DE (1) DE59008036D1 (fr)
WO (1) WO1990014446A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1042805C (zh) * 1994-03-28 1999-04-07 本溪钢铁公司 一种钢管镶铸方法
CN1057242C (zh) * 1995-12-19 2000-10-11 苌保俊 轴承合金现场无胎浇挂工艺
CN1067928C (zh) * 1997-09-23 2001-07-04 曾征 薄壁合金制品浸没结晶成型方法
ITMI20012098A1 (it) * 2001-10-11 2003-04-11 Giorgio Enrico Falck Procedimento per la produzione di lingotti metallici con anima di acciaio inossidabile
AU2002343118A1 (en) * 2001-10-11 2003-04-28 Corinox S.R.L. A method for the production of hollow metallic ingots or compound metallic ingots
CN101440467B (zh) * 2008-12-12 2010-06-02 南车四方车辆有限公司 一种金属部件螺纹孔在热浸锌防腐处理中的保护方法
CN103317124B (zh) * 2013-06-05 2015-04-08 无锡舒玛天科新能源技术有限公司 一种铜铟镓旋转靶材的制备方法
CN116732459B (zh) * 2023-06-14 2024-03-29 江苏塞恩斯金属新材料科技有限公司 一种高强度、耐低温钢管及其制备工艺

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1938257A (en) * 1931-12-29 1933-12-05 Jones Ernest Fraser Production of hollow ingots
AT302223B (de) * 1970-09-22 1972-10-10 Voest Ag Verfahren zur Erzeugung von dreischichtigen Walzprodukten
JPS54141343A (en) * 1978-04-25 1979-11-02 Nitto Aen Tokin Kk Wet galvanizing method for steel pipe outside
DE3134758A1 (de) * 1981-09-02 1983-03-17 Kocks Technik Gmbh & Co, 4010 Hilden Verfahren zum herstellen von metallischen hohlbloecken
JPS58103937A (ja) * 1981-12-17 1983-06-21 Sumitomo Metal Ind Ltd 中空鋼片の製造方法
JPS6021174A (ja) * 1983-07-15 1985-02-02 Toyota Motor Corp 有底中空体の製造方法
JPS613874A (ja) * 1984-06-15 1986-01-09 Kubota Ltd 二層管の製造方法
JPS6152357A (ja) * 1984-08-18 1986-03-15 Sumitomo Metal Ind Ltd 継目無クラツド管の製造方法
US4759399A (en) * 1986-05-15 1988-07-26 Kawasaki Steel Corporation Method and apparatus for producing hollow metal ingots
JPH01218759A (ja) * 1988-02-29 1989-08-31 Kawasaki Steel Corp 中空鋳片の製造方法

Also Published As

Publication number Publication date
CA2033079A1 (fr) 1990-11-17
DE59008036D1 (de) 1995-01-26
JP2925093B2 (ja) 1999-07-26
US5232740A (en) 1993-08-03
CN1047235A (zh) 1990-11-28
EP0472546A1 (fr) 1992-03-04
JPH04505184A (ja) 1992-09-10
KR920700304A (ko) 1992-02-19
ATE115643T1 (de) 1994-12-15
BR9007180A (pt) 1992-01-28
CN1028847C (zh) 1995-06-14
CA2033079C (fr) 1998-12-29
WO1990014446A1 (fr) 1990-11-29
KR930010337B1 (ko) 1993-10-16

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