EP0761826B1 - Procédé de fabrication d'un tube ODS sans soudure - Google Patents

Procédé de fabrication d'un tube ODS sans soudure Download PDF

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Publication number
EP0761826B1
EP0761826B1 EP96202345A EP96202345A EP0761826B1 EP 0761826 B1 EP0761826 B1 EP 0761826B1 EP 96202345 A EP96202345 A EP 96202345A EP 96202345 A EP96202345 A EP 96202345A EP 0761826 B1 EP0761826 B1 EP 0761826B1
Authority
EP
European Patent Office
Prior art keywords
seamless pipes
manufacturing seamless
pipes according
group
oxides
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
EP96202345A
Other languages
German (de)
English (en)
Other versions
EP0761826A2 (fr
EP0761826A3 (fr
Inventor
Dieter Dr. Sporer
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.)
Plansee SE
Original Assignee
Plansee SE
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 Plansee SE filed Critical Plansee SE
Publication of EP0761826A2 publication Critical patent/EP0761826A2/fr
Publication of EP0761826A3 publication Critical patent/EP0761826A3/fr
Application granted granted Critical
Publication of EP0761826B1 publication Critical patent/EP0761826B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • C21D8/00—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
    • C21D8/10—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
    • C22C32/001—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with only oxides
    • C22C32/0015—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with only oxides with only single oxides as main non-metallic constituents
    • C22C32/0026—Matrix based on Ni, Co, Cr or alloys thereof
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/04—Making non-ferrous alloys by powder metallurgy
    • C22C1/05—Mixtures of metal powder with non-metallic powder
    • C22C1/059—Making alloys comprising less than 5% by weight of dispersed reinforcing phases
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C19/00—Alloys based on nickel or cobalt
    • C22C19/03—Alloys based on nickel or cobalt based on nickel
    • C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/02—Making ferrous alloys by powder metallurgy
    • C22C33/0207—Using a mixture of pre-alloyed powders or a master alloy
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/10—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of nickel or cobalt or alloys based thereon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/24—After-treatment of workpieces or articles
    • B22F2003/248—Thermal after-treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • B22F2998/10—Processes characterised by the sequence of their steps

Definitions

  • the invention relates to a method for producing seamless tubes Materials according to the preamble of claim 1, which by mechanical deformation in combination with a recrystallizing heat treatment a strongly stretched coarse grain structure form.
  • Such materials are dispersion-strengthened metals, metal alloys or intermetallic phases due to their excellent mechanical Properties at high temperatures, especially for thermal and mechanically highly stressed components are used.
  • An important Group of these materials are the so-called ODS super alloys Iron, nickel or cobalt based, in which oxide particles are used as dispersoids be used.
  • the ODS superalloys expand that Temperature range from heat-resistant materials to around 1350 ° C.
  • the largest mechanical pipe is inside Stress in the circumferential direction.
  • the material stress in The circumferential direction is twice as high as that in the pipe longitudinal direction.
  • For Inner pressure pipes that are exposed to high temperatures are available therefore the materials mentioned with an elongated coarse grain structure then if it is ensured that the high structural extension in Pipe circumferential direction is set to the heat resistance potential of this Make full use of materials.
  • seamless tubes made from the materials mentioned, for example by deep hole drilling from bar material or by hot extrusion with or without subsequent cold reduction, such as pipe drawing or Pipe pilger step rollers manufactured.
  • the disadvantage of these methods lies in that the main forming direction lies in the axial direction of the tube and hence the strong structural extension or structural orientation in this Direction is the highest with a relatively low strength claimed pipe circumferential direction is connected.
  • the process limits the pipe formats that can be generated via the maximum available pressing forces of industrial extrusion presses both strongly up as well as down.
  • the method is that only relatively thick-walled tubes are produced can what for pipes in Tube bundle heat exchangers or simply for reasons of increased Material costs, despite the optimized structure, often no technical or economically satisfactory pipe manufacturing allowed.
  • hot extrusion can be used with or without downstream cold processing process tubes with outside diameters Produce between 25 and 40 mm with wall thicknesses between 2.5 and 5 mm.
  • the object of the present invention is to provide a method for the production of seamless pipes from ODS materials, in which a strongly stretched structure in Pipe circumferential direction is oriented, which is a good simple Reproducibility of these microstructures guaranteed and with that too thin-walled pipes with wall thicknesses below 2.5 mm over a large one Diameter range can be produced.
  • the object is achieved by a method according to claim 1.
  • the cup-shaped or tubular starting part is on a conventional press on a mandrel and by means of a or preferably several spinning rollers in one or more overflows in the Outside diameter reduced.
  • pipes are with Wall thicknesses between 0.3 and 2.5 mm and diameters in the range from 20 to 450 mm producible.
  • the kinematics of the cylinder pressure rolling process is such that the material flow takes place almost exclusively in the axial direction during the forming.
  • the tangential must be obtained with an inside diameter that is as accurate as possible Material flow (material flow in the pipe circumferential direction) by coordinating the Dimensions of the output part on the pressure rollers used and Number of overflows can be reduced to a minimum.
  • the inventive method also has the advantage that high Cross-sectional reductions per pass rolling pass as well as high Total cross-sectional decreases without heating and without Intermediate annealing steps can be achieved. This was particularly the case with Application of the process is not expected for ferritic ODS materials, since these materials show a brittle-ductile transition behavior, so that such Forming materials usually always at least 60 - 100 ° must be preheated to ensure crack-free parts after forming to surrender.
  • the fact that the inventive method practically in all Materials can be applied at room temperature without the workpiece and mandrel need to be preheated, there is one economical production and excellent reproducibility of the pipes. The good reproducibility affects both the good dimensional accuracy as well the metallurgical quality with regard to that stretched in the pipe circumferential direction Coarse grain structure after recrystallization annealing.
  • the oxides of one or several metals from the group yttrium, aluminum, lanthanum, cerium and zircon proven.
  • a variant of a material that can be used according to the invention is that solidifying particles in the material so that the material reactive metallic additives are added during processing of the material and / or during a heat treatment in the corresponding oxide, nitride or carbide particles are converted.
  • iron-based alloys 6-30% by weight Cr, 0-10% by weight Al, 0-2% by weight Ti, 0-10% by weight Mo, 0-10% by weight W, 0-10% by weight Ta, 0.1-2% by weight of one or more oxides from the group Y, Al, La, Ce and Zr, as well as Fe as the balance and as nickel-based alloys those with the composition 6-38% by weight Cr, 0.1-7% by weight Al, 0-2% by weight Ti, 0-5% by weight Mo, 0-5% by weight W, 0-5% by weight Ta, 0.1-2% by weight of one or more oxides from the group Y, Al, La, Ce and Zr, and Ni as the rest, in particular proven.
  • the tube was recrystallized in air at a temperature of 1380 ° C for one hour.
  • a very thin and firmly adhering Al 2 O 3 layer formed during this annealing.
  • a metallographic examination of the annealed tube revealed a coarse-grained recrystallization structure with a high structural extension in the tube circumferential direction corresponding to FIG. 1.
  • a hollow format was produced from an ODS alloy of the same composition as in Example 1 by mechanical alloying of the powder starting materials, hot isostatic pressing and subsequent conventional hole pressing. From this blank, a sleeve-shaped blank with an inner diameter of 60 mm and a wall thickness of 5 mm was subsequently produced by overturning. The blank obtained in this way has a fine-grained structure. It was formed from the initial wall thickness of 5 mm to an end wall thickness of 0.7 mm in just three overflows by spinning. This corresponds to an overall degree of deformation of 84% relative cross-sectional decrease, which was achieved without heating and without intermediate annealing. The tube was then examined for cracks using both the dye penetration method and the eddy current test. The tube was subsequently recrystallized in air at 1380 ° C. for one hour. The microstructure shown in FIG. 2 was formed.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Heat Treatment Of Steel (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Arc Welding In General (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)

Claims (7)

1. Procédé de fabrication de tubes sans soudure, à texture fortement étirée dans ux de formage d'au moins 30% et en prenant les dispositions habituelles pour minimiser le flux tangentiel de matière, et en ce que la matière est recristallisée en gros grains par un recuit intermédiaire entre étapes individuelles de formage ou par un recuit final après la fin du formage.
2. Procédé de fabrication de tubes sans soudure selon la revendication 1, caractérisé en ce que les particules consolidantes sont des oxydes d'un ou plusieurs des métaux du groupe formé par l'yttrium, l'aluminium, le lantux de formage d'au moins 30% et en prenant les dispositions habituelles pour minimiser le flux tangentiel de matière, et en ce que la matière est recristallisée en gros grains par un recuit intermédiaire entre étapes individuelles de formage ou par un recuit final après la fin du formage.
2. Procédé de fabrication de tubes sans soudure selon la revendication 1, caractérisé en ce que les particules consolidantes sont des oxydes d'un ou plusieurs des métaux du groupe formé par l'yttrium, l'aluminium, le lanthane, le cérium et le zirconium.
3. Procédé de fabrication de tubes sans soudure selon la revendication 1, caractérisé en ce que les particules consolidantes consistent en additifs métalliques réactifs qui sont transformés en particules correspondantes d'oxydes, de nitrures ou de carbures pendant le formage de la matière et/ou pendant le traitement thermique.
4. Procédé de fabrication de tubes sans soudure selon la revendication 1, caractérisé en ce qu'un alliage consolidé par dispersion à base de fer, de nickel ou de cobalt est utilisé comme alliage métallique.
5. Procédé de fabrication de tubes sans soudure selon la revendication 4, caractérisé en ce que l'alliage se compose de 6 à 30% en poids de Cr, de 0 à 10% en poids d'AI, de 0 à 2% en poids de Ti, de 0 à 10% en poids de Mo, de 0 à 10% en poids de W, de 0 à 10% en poids de Ta, de 0,1 à 2% en poids d'un ou plusieurs oxydes des métaux du groupe formé par Y, Al, La, Ce et Zr, ainsi que de Fe pour le solde.
6. Procédé de fabrication de tubes sans soudure selon la revendication 4, caractérisé en ce que l'alliage se compose de 6 à 38% en poids de Cr, de 0,1 à 7% en poids d'AI, de 0 à 2% en poids de Ti, de 0 à 5% en poids de Mo, de 0 à 5% en poids de W, de 0 à 5% en poids de Ta, de 0,1 à 2% en poids d'un ou plusieurs oxydes des métaux du groupe Y, Al, La Ce ou Zr, ainsi que Ni pour le solde.
EP96202345A 1995-08-28 1996-08-23 Procédé de fabrication d'un tube ODS sans soudure Expired - Lifetime EP0761826B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT45795 1995-08-28
AT457/95 1995-08-28
AT0045795U AT902U1 (de) 1995-08-28 1995-08-28 Verfahren zur herstellung nahtloser rohre

Publications (3)

Publication Number Publication Date
EP0761826A2 EP0761826A2 (fr) 1997-03-12
EP0761826A3 EP0761826A3 (fr) 1998-10-28
EP0761826B1 true EP0761826B1 (fr) 2001-05-23

Family

ID=3491143

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96202345A Expired - Lifetime EP0761826B1 (fr) 1995-08-28 1996-08-23 Procédé de fabrication d'un tube ODS sans soudure

Country Status (4)

Country Link
EP (1) EP0761826B1 (fr)
AT (2) AT902U1 (fr)
DE (1) DE59606939D1 (fr)
ES (1) ES2158234T3 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115055532B (zh) * 2022-05-30 2025-09-09 西北工业大学 一种兼具高强度和高塑性的钴铬基合金无缝管制备方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB629131A (en) * 1947-05-05 1949-09-13 Samuel James Everett Improvements relating to the production of elongated metal tubular parts
US4034588A (en) * 1970-05-11 1977-07-12 Columbiana Foundry Company Methods of piercing and enlarging elongate metal members such as seamless tubes
FR2443884A1 (fr) * 1978-12-15 1980-07-11 Vallourec Fabrication de tubes sans soudure de forts diametres
CH671583A5 (fr) * 1986-12-19 1989-09-15 Bbc Brown Boveri & Cie
DE3832014C2 (de) * 1988-09-16 1994-11-24 Mannesmann Ag Verfahren zur Herstellung hochfester nahtloser Stahlrohre
JPH02217443A (ja) * 1989-02-16 1990-08-30 Sumitomo Metal Ind Ltd ごみ焼却廃熱ボイラ管用高クロム鋼
DE59007734D1 (de) * 1989-05-16 1995-01-05 Asea Brown Boveri Verfahren zur Erzeugung grober längsgerichteter Stengelkristalle in einer oxyddispersionsgehärteten Nickelbasis-Superlegierung.
DE59105546D1 (de) * 1990-03-20 1995-06-29 Asea Brown Boveri Verfahren zur Erzeugung von längsgerichteten grobkörnigen Stengelkristallen in einem aus einer oxyddispersionsgehärteten Nickelbasis-Superlegierung bestehenden Werkstück.
DE4014614A1 (de) * 1990-05-07 1991-11-14 Pm Hochtemperatur Metall Gmbh Superlegierung auf nickelbasis
DE4332132A1 (de) * 1993-09-17 1995-03-23 Mannesmann Ag Herstellverfahren für nahtlose Rohre aus Nichteisenmetallen, insbesondere Kupfer und Kupferlegierungen

Also Published As

Publication number Publication date
EP0761826A2 (fr) 1997-03-12
AT902U1 (de) 1996-07-25
DE59606939D1 (de) 2001-06-28
EP0761826A3 (fr) 1998-10-28
ES2158234T3 (es) 2001-09-01
ATE201456T1 (de) 2001-06-15

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