EP1001856B1 - PROCEDE DE PRODUCTION DE TUYAUX SOUDES EN Cu ET EN ALLIAGE DE Cu - Google Patents

PROCEDE DE PRODUCTION DE TUYAUX SOUDES EN Cu ET EN ALLIAGE DE Cu Download PDF

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Publication number
EP1001856B1
EP1001856B1 EP98943664A EP98943664A EP1001856B1 EP 1001856 B1 EP1001856 B1 EP 1001856B1 EP 98943664 A EP98943664 A EP 98943664A EP 98943664 A EP98943664 A EP 98943664A EP 1001856 B1 EP1001856 B1 EP 1001856B1
Authority
EP
European Patent Office
Prior art keywords
strip
pipe
casting
rolling
steps
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
EP98943664A
Other languages
German (de)
English (en)
Other versions
EP1001856A1 (fr
Inventor
Erling Roller
Peter Kalkenings
Herbert Berendes
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.)
SMS Siemag AG
Original Assignee
SMS Demag 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 SMS Demag AG filed Critical SMS Demag AG
Publication of EP1001856A1 publication Critical patent/EP1001856A1/fr
Application granted granted Critical
Publication of EP1001856B1 publication Critical patent/EP1001856B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/08—Making tubes with welded or soldered seams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/08—Making tubes with welded or soldered seams
    • B21C37/0807—Tube treating or manipulating combined with, or specially adapted for use in connection with tube making machines, e.g. drawing-off devices, cutting-off
    • B21C37/0811—Tube treating or manipulating combined with, or specially adapted for use in connection with tube making machines, e.g. drawing-off devices, cutting-off removing or treating the weld bead
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
    • B21B3/003—Rolling non-ferrous metals immediately subsequent to continuous casting, i.e. in-line rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/08—Making tubes with welded or soldered seams
    • B21C37/083—Supply, or operations combined with supply, of strip material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/30—Finishing tubes, e.g. sizing, burnishing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B17/00—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
    • B21B2003/005—Copper or its alloys
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4998—Combined manufacture including applying or shaping of fluent material
    • Y10T29/49988—Metal casting
    • Y10T29/49991—Combined with rolling

Definitions

  • the invention relates to a method for producing welded tubes Copper and copper alloys in a combined production line consisting of a primary material casting plant, a hot rolling mill, a pipe forming and Welding line and a pulling device for the welded pipe.
  • Seamless pipes are, for example, via the process routes: solid continuous casting, Extrusion, cold vocationalage and drawing are made, the cold vocational also can be omitted. It is also known to use the solid strand in one Hole punching, punching cold and then to the finished dimension pull. Also worth mentioning are processes in which a hollow strand is cast, which is then subjected to the drawing process after the cold vocationalage. All described methods have disadvantages; high extrusion results Manufacturing costs, the tube qualities are not sufficient for hollow continuous casting. Seamless pipes also have poor wall thickness tolerances.
  • Welded pipes are usually made from continuously cast slabs manufactured, which are pre-rolled in hot-plate mills, then cold-rolled, be longitudinally divided and welded. Following the welding process, a Drawing the pipes using conventional drawing methods.
  • a disadvantage of the Pipe welding processes are the high strip manufacturing cost that pipe manufacturing make uneconomical.
  • the belt is manufactured using various processes. It is common Continuous casting of slabs, hot rolling of the slabs, milling of the Surfaces and subsequent cold rolling, the coiling of the cold rolled Tape and subsequent slitting into strips for further processing are fed.
  • the advantage of the cold strip produced in this way is the high level achievable capacities of more than 100,000 t / a with good surface quality.
  • the discontinuous process and the high production costs are disadvantageous.
  • Another method suggests casting thin slabs that are hot rolled make broadband unnecessary. Following this, the Surfaces of the strip are milled before the strip is cold rolled, coated and in strips is divided lengthways. This process can be carried out continuously, medium capacities of less than 100,000 t / a can be achieved with a good surface quality. Also this method has the disadvantage that the manufacturing costs are too high.
  • a third method is known as the so-called high reduction method.
  • the strip in graphite molds with a casting speed v 1 m / min cast, the surfaces are milled, the tape is with high stitch decrease cold rolled, coiled and cut lengthways into strips. This process can be continuous operated, the surface qualities are good. Disadvantages of the procedure are the small capacities around 10,000 t / a with high manufacturing costs.
  • the aim of the present invention is to provide an improved process for the production of inexpensive pipes with high dimensional accuracy and surface quality To create copper and copper alloys on the rolled strip longitudinally welded pipes is processed.
  • the profitability also for the production of small to large quantities (between 10,000 to 100,000 t / a) sought.
  • the method steps according to the invention are in the characterizing part of the Claim 1 described by the sequence of process steps a) to j). It has been found that when casting a supporting strip in the specified Dimension range and the intended casting speed Tailor-made production of the strips is possible, so that a slitting of a pre-rolled sheet becomes unnecessary.
  • the strips have good surface quality and cheap material values at low manufacturing costs.
  • the casting of the supporting strip can according to special features of the invention either on a belt caster or on a casting wheel. Both Casting processes are characterized by high casting speeds and are therefore for the economical production of the strips with the corresponding Dimensions particularly suitable for immediate further processing, whereby Casting wheels have so far only been used in wire production.
  • Hot rolling of the pre-strip takes place between 600 ° C and 900 ° C, so that makes it possible Process to produce grain sizes in the material of 30-40 ⁇ m, which according to Cold rolling better conditions when forming the strips into welding tubes Offer.
  • the descaling of the hot-rolled pre-strip can be done in line with conventional ones Descaling processes, for example by chemical pickling.
  • a known one can be used to pull the longitudinal seam tube Drawing process with the steps decoiling, drum drawing or continuous Pull straight, if necessary intermediate annealing (with the soft and soft grades Semi-hard), finish drawing and soft annealing if necessary (e.g. at Heat exchanger tubes) are used.
  • the inventive method is advantageous because it is in a continuous Process flow is economically capable of welding copper pipes and tubes made of copper alloys in low to high capacity (10,000 to 100,000 t / a) to manufacture, with internally finned pipes even down to 1000 t / a and less.
  • the continuous process sequence using casting machines with very high casting speeds on the one hand enables the high capacity without on the other hand negatively affect the quality of the pipes.
  • the surface of the cast tape corresponds despite the absence of that in the known prior art intended milling of the belt surface the conditions for Precision cold strips for pipe production.
  • the one that arises during hot rolling Grain sizes from 30 to 40 ⁇ m enable more favorable conditions for molding of the strips into welding tubes than was previously the case with soft (annealed) material was possible.
  • the method according to the invention is used for the first time in practice created a useful method for producing welded non-ferrous metal pipes, the due to its high capacity, flexibility and low cost the does not have the disadvantages described in the prior art.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Extraction Processes (AREA)
  • Metal Rolling (AREA)
  • Arc Welding In General (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)
  • Continuous Casting (AREA)

Claims (13)

  1. Procédé pour fabriquer des tubes soudés en Cu et alliages de Cu dans une ligne de fabrication combinée, constituée d'une installation de coulée de matière brute, d'un laminoir à chaud, d'une étendue de mise en forme des tubes et de soudage, ainsi qu'un dispositif d'étirage pour le tube soudé,
    caractérisé par la succession des étapes suivantes de procédé :
    a. coulée d'un pré-feuillard pratiquement sans fin dans la plage dimensionnelle : largeur 45 à 200 mm ; épaisseur 10 à 70 mm, dans une machine de coulée à vitesse de coulée élevée jusqu'à 22 m/mn,
    b. laminage à chaud du pré-feuillard coulé avec une vitesse de laminage = vitesse de coulée x allongement en un feuillard intermédiaire dans la plage dimensionnelle : largeur 45 à 200 mm ; épaisseur 2,0 à 14 mm,
    c. refroidissement du feuillard intermédiaire à ≤ 100°C jusqu'à la température ambiante et décalaminage de la surface du feuillard intermédiaire,
    d. laminage à froid du feuillard intermédiaire en un feuillard dans la plage dimensionnelle : largeur 45 à 200, épaisseur 0,9 à 6,3 mm,
    e. bobinage du feuillard non cisaillé en bobines de poids prédéterminés, les étapes a à e se déroulant comme procédé en ligne et suivant ensuite comme autres étapes de travail,
    f. déroulement et mise en forme du feuillard en un tube à soudure longitudinale,
    g. soudage de la soudure longitudinale directement après le cisaillement des bords en un tube soudé à soudure longitudinale,
    h. ébarbage interne et externe du tube,
    i. calibrage, et
    j. étirage final du tube soudé en au moins une étape d'étirage en le tube fini.
  2. Procédé pour fabriquer des tubes soudés en Cu et alliages de Cu selon la revendication 1,
    caractérisé en ce que la coulée du pré-feuillard est effectuée dans une installation de coulée de feuillards.
  3. Procédé pour fabriquer des tubes soudés en Cu et alliages de Cu selon la revendication 1,
    caractérisé en ce que la coulée du pré-feuillard est effectuée sur une roue de coulée.
  4. Procédé pour fabriquer des tubes soudés en Cu et alliages de Cu selon la revendication 1 ou 2,
    caractérisé en ce que le laminage à chaud du pré-feuillard est effectué pour atteindre des granulométries < 40 µm pour des températures de laminage entre 600 et 900°C.
  5. Procédé pour fabriquer des tubes soudés en Cu et alliages de Cu selon une des revendications 1 à 4,
    caractérisé en ce que le cisaillement du feuillard intermédiaire est effectué dans la machine de soudage.
  6. Procédé pour fabriquer des tubes soudés en Cu et alliages de Cu selon une des revendications 1 à 5,
    caractérisé en ce que le décalaminage du feuillard chaud est effectué par un procédé de décapage chimique.
  7. Procédé selon la revendication 1,
    caractérisé en ce que les étapes de procédé f. à j. sont effectuées après un stockage temporaire.
  8. Procédé selon la revendication 1,
    caractérisé en ce que l'étape de procédé j. est effectuée après un stockage temporaire.
  9. Procédé selon la revendication 1,
    caractérisé en ce que l'étirage final est supprimé lorsque le tube fabriqué par les étapes de procédé a. à i. a déjà atteint la dimension finale.
  10. Procédé pour fabriquer des tubes soudés en Cu et alliages de Cu selon la revendication 1,
    caractérisé en ce que, pour souder le tube à soudure longitudinale, on utilise un procédé de soudage connu à haute fréquence, à tungstène et à gaz inerte, ou à laser, avec les étapes : déroulement, dressage et soudage bout à bout du feuillard intermédiaire, mise en forme, soudage, ébarbage interne et externe, dans le cas du soudage HF, calibrage, mise à longueur, enroulement et enlèvement de la limaille interne.
  11. Procédé pour fabriquer des tubes soudés en Cu et alliages de Cu selon la revendication 1,
    caractérisé en ce que, pour étirer le tube à soudure longitudinale, on utilise un procédé d'étirage connu avec les étapes : déroulement, étirage sur tambour ou étirage rectiligne continu, le cas échéant recuit intermédiaire, étirage final et, le cas échéant, recuit.
  12. Procédé pour fabriquer des tubes soudés en Cu et alliages de Cu dans une ligne de fabrication combinée, constituée d'une installation de coulée de matière brute, d'un laminoir à chaud, d'une étendue de mise en forme des tubes et de soudage, ainsi qu'un dispositif d'étirage pour le tube soudé,
    caractérisé par la succession des étapes suivantes de procédé :
    a. coulée d'un pré-feuillard pratiquement sans fin dans la plage dimensionnelle : largeur 45 à 200 mm ; épaisseur 10 à 70 mm, dans une machine de coulée à vitesse de coulée élevée jusqu'à 22 m/mn,
    b. laminage à chaud du pré-feuillard coulé à une vitesse de laminage = vitesse de coulée x allongement en un feuillard intermédiaire dans la plage dimensionnelle : largeur 45 à 200 mm ; épaisseur 2,0 à 14 mm,
    c. refroidissement du feuillard intermédiaire à ≤ 100°C jusqu'à la température ambiante et décalaminage de la surface du feuillard intermédiaire,
    d. laminage à froid du feuillard intermédiaire en un feuillard dans la plage dimensionnelle : largeur 45 à 200 mm ; épaisseur < 0,9 mm,
    e. enroulement du feuillard non cisaillé en bobines de poids prédéterminés, les étapes a à e se déroulant comme un procédé en ligne et suivant ensuite comme autres étapes de travail,
    f. déroulement,
    g. nervurage du feuillard,
    h. mise en forme et soudage et calibrage du feuillard nervuré en un tube à soudure longitudinale intérieurement nervuré à la dimension finale.
  13. Procédé selon la revendication 12,
    caractérisé en ce que les étapes de procédé f. à h. sont effectuées après un stockage temporaire.
EP98943664A 1997-08-06 1998-07-01 PROCEDE DE PRODUCTION DE TUYAUX SOUDES EN Cu ET EN ALLIAGE DE Cu Expired - Lifetime EP1001856B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19734780 1997-08-06
DE19734780A DE19734780C1 (de) 1997-08-06 1997-08-06 Verfahren zur Herstellung von geschweißten Rohren aus Cu und Cu-Legierungen
PCT/DE1998/001898 WO1999007491A1 (fr) 1997-08-06 1998-07-01 PROCEDE DE PRODUCTION DE TUYAUX SOUDES EN Cu ET EN ALLIAGE DE Cu

Publications (2)

Publication Number Publication Date
EP1001856A1 EP1001856A1 (fr) 2000-05-24
EP1001856B1 true EP1001856B1 (fr) 2002-11-27

Family

ID=7838657

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98943664A Expired - Lifetime EP1001856B1 (fr) 1997-08-06 1998-07-01 PROCEDE DE PRODUCTION DE TUYAUX SOUDES EN Cu ET EN ALLIAGE DE Cu

Country Status (14)

Country Link
US (1) US6401323B1 (fr)
EP (1) EP1001856B1 (fr)
JP (1) JP2001513443A (fr)
KR (1) KR20010022528A (fr)
CN (1) CN1100629C (fr)
AT (1) ATE228403T1 (fr)
AU (1) AU735019B2 (fr)
CA (1) CA2299372C (fr)
DE (2) DE19734780C1 (fr)
ES (1) ES2183414T3 (fr)
ID (1) ID24050A (fr)
PL (1) PL187804B1 (fr)
TW (1) TW369441B (fr)
WO (1) WO1999007491A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59906069D1 (de) * 1998-09-09 2003-07-31 Sms Demag Ag Verfahren zur Herstellung von geschweissten Rohren aus Kupfer
CA2563094C (fr) * 2004-08-10 2012-03-27 Sanbo Shindo Kogyo Kabushiki Kaisha Moulage d'alliage de cuivre ayant subi un affinage du grain
JP2006341276A (ja) * 2005-06-09 2006-12-21 Jp Steel Plantech Co 連続圧延方法及び連続圧延設備
DE102005031805A1 (de) * 2005-07-07 2007-01-18 Sms Demag Ag Verfahren und Fertigungslinie zum Herstellen von Metallbändern aus Kupfer oder Kupferlegierungen
WO2007043101A1 (fr) * 2005-09-30 2007-04-19 Sanbo Shindo Kogyo Kabushiki Kaisha Matière solidifiée à l’état fondu, matériau d'alliage de cuivre pour une solidification à l’état fondu et son procédé de production
DE102007022927A1 (de) * 2006-05-26 2007-12-20 Sms Demag Ag Vorrichtung und Verfahren zum Herstellen eines Metallbandes durch Stranggießen
DE102007022931A1 (de) * 2006-05-26 2007-11-29 Sms Demag Ag Verfahren und Vorrichtung zum Herstellen eines Metallbandes durch Stranggießen
CN101737565B (zh) * 2008-11-04 2011-12-28 肖玉佳 一种制造铜铝复合管的方法
CN101767123A (zh) * 2009-12-29 2010-07-07 大连通发新材料开发有限公司 生产铝包铜管的工艺及设备
CN102000716B (zh) * 2010-11-30 2013-05-08 大连三高科技发展有限公司 大径直缝焊管生产线
CN103591118B (zh) * 2013-11-19 2015-12-02 无锡苏嘉法斯特汽车零配件有限公司 传动轴管的制造工艺
CN104148437A (zh) * 2014-06-29 2014-11-19 柳州美纳机械有限公司 双金属复合管的生产方法
CN106216959B (zh) * 2016-08-18 2018-03-30 无锡苏嘉法斯特汽车零配件有限公司 汽车车架用焊接钢管的制造方法
CN106216955B (zh) * 2016-08-18 2018-01-23 无锡苏嘉法斯特汽车零配件有限公司 特殊钢传动轴管制造工艺
CN106216956B (zh) * 2016-08-18 2018-03-30 无锡苏嘉法斯特汽车零配件有限公司 汽车传动轴管的制造方法
CN106216957B (zh) * 2016-08-18 2018-01-05 无锡苏嘉法斯特汽车零配件有限公司 汽车扭力梁用焊接钢管的制造方法
CN107188394B (zh) * 2017-07-25 2019-12-10 成都光明派特贵金属有限公司 玻璃出料管拉拔模组、玻璃出料管制造方法及玻璃出料管
CN110681716A (zh) * 2019-09-18 2020-01-14 东莞市竹菱铜业有限公司 一种铍青铜管制备方法
CN114289544A (zh) * 2021-12-31 2022-04-08 武汉市博钛新材料科技有限公司 一种高频感应钛焊管的快速缩径生产装置及工艺

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US3858785A (en) * 1971-12-30 1975-01-07 Olin Corp Apparatus for making heat exchanger tube
LU81564A1 (fr) * 1979-07-31 1981-03-24 Liege Usines Cuivre Zinc Procede de fabrication de tubes,tubes obtenus par ce procede et leur utilisation dans des condenseurs et des echangeurs de chaleur
JPS58168429A (ja) * 1982-03-30 1983-10-04 Sumitomo Metal Ind Ltd 溶接製管設備列
JPS60102224A (ja) * 1983-11-09 1985-06-06 Hitachi Ltd 角パイプの連続製造方法及び装置

Also Published As

Publication number Publication date
US6401323B1 (en) 2002-06-11
AU735019B2 (en) 2001-06-28
CA2299372C (fr) 2006-06-27
KR20010022528A (ko) 2001-03-15
CA2299372A1 (fr) 1999-02-18
DE19734780C1 (de) 1998-12-10
JP2001513443A (ja) 2001-09-04
PL338441A1 (en) 2000-11-06
TW369441B (en) 1999-09-11
ES2183414T3 (es) 2003-03-16
CN1100629C (zh) 2003-02-05
DE59806458D1 (de) 2003-01-09
CN1265612A (zh) 2000-09-06
ID24050A (id) 2000-07-06
WO1999007491A1 (fr) 1999-02-18
EP1001856A1 (fr) 2000-05-24
ATE228403T1 (de) 2002-12-15
AU9151898A (en) 1999-03-01
PL187804B1 (pl) 2004-10-29

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