EP0764063B1 - Verfahren zur herstellung eines nahtlosen warmgefertigten rohres - Google Patents
Verfahren zur herstellung eines nahtlosen warmgefertigten rohres Download PDFInfo
- Publication number
- EP0764063B1 EP0764063B1 EP95921715A EP95921715A EP0764063B1 EP 0764063 B1 EP0764063 B1 EP 0764063B1 EP 95921715 A EP95921715 A EP 95921715A EP 95921715 A EP95921715 A EP 95921715A EP 0764063 B1 EP0764063 B1 EP 0764063B1
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- EP
- European Patent Office
- Prior art keywords
- casting
- steel
- cast
- range
- length
- 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
Links
- 238000000034 method Methods 0.000 title claims abstract description 40
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 32
- 239000010959 steel Substances 0.000 claims abstract description 32
- 238000004519 manufacturing process Methods 0.000 claims abstract description 22
- 238000005266 casting Methods 0.000 claims abstract description 17
- 238000009792 diffusion process Methods 0.000 claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims abstract description 4
- 239000000203 mixture Substances 0.000 claims abstract description 3
- 238000000926 separation method Methods 0.000 claims abstract description 3
- 238000007493 shaping process Methods 0.000 claims abstract 3
- 239000000126 substance Substances 0.000 claims abstract 2
- 238000009749 continuous casting Methods 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 18
- 229910052799 carbon Inorganic materials 0.000 claims description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 238000000137 annealing Methods 0.000 claims description 6
- 229910000805 Pig iron Inorganic materials 0.000 claims description 5
- 238000007872 degassing Methods 0.000 claims description 5
- 238000005275 alloying Methods 0.000 claims description 4
- 238000007654 immersion Methods 0.000 claims description 4
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 229910052748 manganese Inorganic materials 0.000 claims description 3
- 239000011572 manganese Substances 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 2
- 238000005192 partition Methods 0.000 claims description 2
- 238000001556 precipitation Methods 0.000 claims description 2
- 239000010703 silicon Substances 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims 5
- 239000005864 Sulphur Substances 0.000 claims 2
- 239000004411 aluminium Substances 0.000 claims 2
- 239000011651 chromium Substances 0.000 claims 2
- 238000011010 flushing procedure Methods 0.000 claims 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims 1
- 238000007664 blowing Methods 0.000 claims 1
- 229910052804 chromium Inorganic materials 0.000 claims 1
- 238000010008 shearing Methods 0.000 claims 1
- 239000007788 liquid Substances 0.000 abstract description 2
- 238000005096 rolling process Methods 0.000 description 14
- 229910052717 sulfur Inorganic materials 0.000 description 6
- 238000005242 forging Methods 0.000 description 5
- 238000004080 punching Methods 0.000 description 5
- 239000011593 sulfur Substances 0.000 description 5
- 238000011144 upstream manufacturing Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000005272 metallurgy Methods 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000009847 ladle furnace Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 150000001247 metal acetylides Chemical class 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- -1 calcium aluminates Chemical class 0.000 description 1
- 230000001914 calming effect Effects 0.000 description 1
- 238000010622 cold drawing Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- FXNGWBDIVIGISM-UHFFFAOYSA-N methylidynechromium Chemical compound [Cr]#[C] FXNGWBDIVIGISM-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000007712 rapid solidification Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
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
-
- 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
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
- B21J5/10—Piercing billets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
- B21B1/466—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a non-continuous process, i.e. the cast being cut before rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B23/00—Tube-rolling not restricted to methods provided for in only one of groups B21B17/00, B21B19/00, B21B21/00, e.g. combined processes planetary tube rolling, auxiliary arrangements, e.g. lubricating, special tube blanks, continuous casting combined with 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
- B21B3/02—Rolling special iron alloys, e.g. stainless steel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H1/00—Making articles shaped as bodies of revolution
- B21H1/06—Making articles shaped as bodies of revolution rings of restricted axial length
- B21H1/12—Making articles shaped as bodies of revolution rings of restricted axial length rings for ball or roller bearings
Definitions
- the invention relates to a method for producing a hot-formed tube high-carbon especially hypereutectoid steel according to the generic term of Main claim.
- a block is cast, which turns into a tube round on a roughing mill is rolled.
- This round tube is preferably closed using the Assel method formed into a hot-finished pipe (see steel pipe manual 10th edition, Vulkan-Verlag, Essen, 1986, pages 141-143).
- Assel Street usually points a rotary hearth furnace as a heating system, one as a cross rolling mill trained perforator for producing a hollow body follows.
- This hollow body an Assel mill consisting of three is evenly distributed over the circumference arranged cross rollers supplied with a shoulder calibration are. After pulling out the rod that serves as the inner tool, this becomes Intermediate pipe reheated and over a multi-stand reducing mill and over a downstream sizing mill produces the hot-finished pipe.
- a disadvantage of this method is that the tube round used close to the dimension must be hot-made pipe and to cover the delivery program A large number of rolled or forged tubular round material is required.
- Assel Street is the preferred facility for the production of roller bearing tubes, but also other tube production systems, such as push bench systems or Pipe continuous lines are always used using preformed and diffusion annealed feed.
- the object of the invention is a method for producing a hot-finished Specify tube from high-carbon, in particular hypereutectoid steel, which in Compared to the known method is cheaper and with a higher Material utilization and a shorter material throughput time can be achieved.
- the essence of the invention is the use of undeformed continuous casting from steel, in particular from the material group of rolling bearing steels of any cross-section on a tube production system, eliminating the previously required upstream rolling or forging process and dispensing with the diffusion annealing required by the prior art considerable cost and time.
- the material is used better because it does not have to be divided and scooped as often.
- care must be taken to ensure that during the hole process as part of the overall process of the tube production plant, a stress state is built up in the length of use to be formed, which has the highest possible negative mean stress value s m while minimizing shear stresses.
- the method according to the invention can be used for all types of continuous casting, such as vertical continuous casting or curved continuous casting, and regardless of the cross section, ie whether square, octagonal, polygonal or round.
- the continuous casting block produced is divided into insert lengths without pre-deformation, ie in the as-cast state, heated to the forming temperature and then fed to the tube production system.
- the push bench and the drawing press method have proven to be particularly advantageous.
- the heated insert length for the punching process is inserted into a round die and, as already mentioned, a negative mean stress value s m is built up during the punching process in the workpiece to be formed. This prevents the material from tearing open.
- modified metallurgy and special measures for casting the continuous casting are provided as measures according to the invention.
- This also includes an adapted casting speed in the range of preferably 1.8-1.2 m / min. for the dimension range 170 - 240 mm ⁇ .
- the casting speed ranges given above make it easier for the bubbles and inclusions to rise in the sense of a high degree of purity, but are selected so that the desired fine grain size is not impaired.
- the rapid solidification of the relatively small cross sections leads to a structure with a high degree of fine grain even in the as-cast state and at the same time prevents the precipitation of coarse carbides.
- the special immersion nozzle is characterized in that the diameter is ⁇ 25 mm with a corresponding height. This has a favorable effect on the ferrostatic pressure and the flow behavior during casting.
- a minimum content of aluminum is often required. Since a generally customary calcium treatment in the sense of the formation of liquid calcium aluminates to improve the degree of purity for the rolling bearing steel is not permitted, the aluminum content must be chosen so that the amount of Al 2 O 3 formed in the cast continuous casting is small. For this reason, no aluminum is added in the process according to the invention without the oxygen content assuming undesirable values. Dispensing with the addition of Al does not mean that no traces of Al are present in the melt, either because of the low Al content of the alloy components or because of the lining.
- the method according to the invention is based on an arbitrarily chosen example - Use of undeformed and non-diffusion-annealed continuous casting preferably hypereutectoid steel for the production of seamless roller bearing tubes a tube production plant with a punch press, in which the choice of Forming conditions a compressive stress state arises during punching - closer explained.
- a hot-rolled pipe is to be manufactured Dimension 60.3 ⁇ with 8.0 mm wall made of bearing steel 100Cr6.
- Starting from A pig iron produced in the blast furnace is in a first step desulfurized, to a range less than 0.010 percent by mass. over The pig iron is turned into an LD converter with a capacity of up to 250 t Blown steel.
- the casting is then carried out in a round format on a multi-core continuous casting machine to a diameter of 220 mm.
- the casting speed is approx. 1.4 m / min.
- the distributor is provided with partitions for better flow control and the immersion nozzle preferably has a diameter of ⁇ 25 mm with a longer one Pouring funnel that always remains filled.
- the entire casting room is made with argon sealed and when pouring the melt is not flushed with argon, so that no perm plug is required.
- special starting heads are used for casting. After When they are cut into long rods, they are marked and visually for defects checked and then transported to the push bench system.
- the first forming of the takes place in the punch press heated ingot to a hollow body with the dimensions 223.0 x 51.0 mm instead. This corresponds to an extension of 1.39.
- the hollow body is in the elongator stretched further to a dimension of 192.0 x 40.0 mm. This corresponds to one Elongation of 1.43.
- the elongated hollow body having a bottom becomes inserted into the push bench.
- the hollow body is inserted by means of an inserted rod pushed through several scaffolds, thereby measuring 127.5 x 8.25 mm lengthened.
- the aspect ratio is 6.18.
- the rod is pulled out and the Separated floor area.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
- Heat Treatment Of Steel (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
- Rolls And Other Rotary Bodies (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Heat Treatment Of Articles (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Extrusion Of Metal (AREA)
- Metal Rolling (AREA)
Description
Claims (12)
- Verfahren zur Herstellung eines nahtlos warmgefertigten Rohres aus hochgekohltem insbesondere übereutektoidem Stahl, bei dem ein vorbehandelter und entgaster sowie desoxidierter flüssiger Stahl im Strangguß in der erforderlichen chemischen Zusammensetzung mit beliebigem Querschnitt vergossen und nach Abtrennung vom Strang der Stranggußstab auf Einsatzlänge aufgeteilt einer Umformung unterworfen wird,
dadurch gekennzeichnet,
daß ein Stranggußmaterial hohen Reinheitsgrades, mit feinen Karbidausscheidungen und hoher Feinkörnigkeit erzeugt wird und daß die Einsatzlänge ohne jegliche Vorverformung, d. h. im Gußzustand und ohne Wärmebehandlung z.B. Diffusionsglühung auf Umformtemperatur erwärmt und einer Rohrerzeugungsanlage, die vorzugsweise eine Lochpresse in ihrem Anlagenkonzept aufweist, zugeführt wird, wobei beim Lochprozeß als Teil des Gesamtprozesses der Rohrerzeugungsanlage in der umzuformenden Einsatzlänge ein Spannungszustand aufgebaut wird, der unter Minimierung von Scherspannungen einen möglichst hohen negativen Spannungsmittelwert sm aufweist. - Verfahren nach Anspruch 1,
dadurch gekennzeichnet,
daß beim Lochprozeß ein die Einsatzlänge aufnehmendes Werkzeug verwendet wird, das eine geschlossene Mantelfläche aufweist. - Verfahren nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
daß die Einsatzlänge wahlweise einen viereckigen oder sonstigen polygonalen vorzugsweise einen runden Querschnitt aufweist. - Verfahren nach Anspruch 1,
dadurch gekennzeichnet,
daß beim Lochprozeß ein Aggregat mit nicht geschlossenem Arbeitsraum, insbesondere Kegelschrägwalzwerk, verwendet wird, wobei die Einsatzlänge vorzugsweise einen runden Querschnitt hat. - Verfahren nach den Ansprüchen 1 bis 4,
dadurch gekennzeichnet,
daß der Stahl im Rundstrangguß mit einem Format im Bereich von 170 mm bis 450 mm und einer Gießgeschwindigkeit im Bereich von 1,8 - 0,6 m/min, vorzugsweise im Bereich von 1,8 - 1,2 m/min für den Abmessungsbereich 170 - 240 mm ⊘ vergossen wird. - Verfahren nach den Ansprüchen 1 bis 5,
dadurch gekennzeichnet,
daß für übereutektoiden Stahl der Werkstoff-Gruppe der Wälzlagerstähle der flüssige Stahl zunächst ausschließlich über Kohlenstoff, Silizium und Mangan ohne Zugabe von Aluminium teildesoxidiert und anschließend im Vakuum über Kohlenstoff volldesoxidiert wird. - Verfahren nach Anspruch 6,
dadurch gekennzeichnet,
daß bei zerspanender Weiterverarbeitung des warmgefertigten Rohres der Schwefelgehalt im Bereich 0,008 bis 0,015 Massenanteile in Prozent liegt und bei weitgehend spanloser Weiterverarbeitung der Schwefelgehalt maximal 0,005 Massenanteil in Prozent beträgt. - Verfahren nach den Ansprüchen 6 und 7,
dadurch gekennzeichnet,
daß für das Chrom-Kohlenstoffverhältnis ein Bereich zwischen 1,35 und 1,52 gewählt wird. - Verfahren nach Anspruch 8,
dadurch gekennzeichnet,
daß das Cr/C-Verhältnis vorzugsweise 1,45 beträgt. - Verfahren nach einem der vorhergehenden Ansprüche 5 bis 9,
dadurch gekennzeichnet,
daß beim Abguß in die Stranggußanlage ein Tauchausguß mit einem Durchmesser ≤ 25 mm bei einer entsprechenden Bauhöhe sowie ein Verteiler mit Zwischenwänden eingesetzt wird. - Verfahren nach einem der vorhergehenden Ansprüche 1 bis 3 und 5 bis 10,
dadurch gekennzeichnet,
daß die Rohrerzeugungsanlage eine Stoßbank mit einer Presse als Lochaggregat ist. - Verfahren nach einem der vorhergehenden Ansprüche 1 bis 11,
dadurch gekennzeichnet,
daß der Stahlherstellungsprozeß folgende Schritte aufweist:RoheisenerzeugungRoheisenentschwefelungBlasprozeß z.B. in einem LD-KonverterPfannenabstich, wie z.B. Legieren, kombinierte Desoxidation mit C, Si und Mn ohne Zugabe von AluminiumPfannenbehandlung ohne Lichtbogenheizung wie z.B. Entgasung und Kohlenstoff-Desoxidation unter Vakuum, Feinlegierung, SpülenAbgießen im Rundformat auf einer Bogenstranggießanlage unter Verzicht auf eine Argonspülung während des Gießens.
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4422011 | 1994-06-16 | ||
DE4422011 | 1994-06-16 | ||
DE19520833 | 1995-05-31 | ||
DE19520833A DE19520833C2 (de) | 1994-06-16 | 1995-05-31 | Verfahren zur Herstellung eines nahtlosen warmgefertigten Rohres |
PCT/DE1995/000800 WO1995034387A1 (de) | 1994-06-16 | 1995-06-13 | Verfahren zur herstellung eines nahtlosen warmgefertigten rohres |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0764063A1 EP0764063A1 (de) | 1997-03-26 |
EP0764063B1 true EP0764063B1 (de) | 1999-02-03 |
Family
ID=25937667
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95921715A Expired - Lifetime EP0764063B1 (de) | 1994-06-16 | 1995-06-13 | Verfahren zur herstellung eines nahtlosen warmgefertigten rohres |
Country Status (11)
Country | Link |
---|---|
EP (1) | EP0764063B1 (de) |
JP (1) | JPH10505789A (de) |
CN (1) | CN1062785C (de) |
AT (1) | ATE176411T1 (de) |
BR (1) | BR9508017A (de) |
CA (1) | CA2192970A1 (de) |
CZ (1) | CZ364496A3 (de) |
ES (1) | ES2128736T3 (de) |
PL (1) | PL178838B1 (de) |
SK (1) | SK282573B6 (de) |
WO (1) | WO1995034387A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102179681A (zh) * | 2011-03-30 | 2011-09-14 | 盛泽能源技术有限公司 | 一种采用连铸坯周期锻轧毛坯的管模制造工艺 |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19734563C1 (de) * | 1997-08-04 | 1998-12-03 | Mannesmann Ag | Verfahren zur Herstellung von Wälzlagerringen aus Stahl |
UA90116C2 (ru) * | 2004-10-25 | 2010-04-12 | В & М Дойчленд Гмбх | Способ изготовления бесшовной стальной трубы |
CZ299495B6 (cs) * | 2005-12-06 | 2008-08-13 | Comtes Fht, S. R. O. | Zpusob výroby vysokopevných nízkolegovaných ocelových trubek |
CN102366767B (zh) * | 2011-10-10 | 2017-01-11 | 南通超力卷板机制造有限公司 | 一种钢管的制造方法 |
WO2013086881A1 (zh) * | 2011-12-12 | 2013-06-20 | Xie Zhaozong | 用于金属的连铸成型加工设备和方法 |
CN110328253A (zh) * | 2019-08-14 | 2019-10-15 | 江阴华润制钢有限公司 | 一种双金属复合管的连轧方法 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR366480A (fr) * | 1905-06-29 | 1906-10-05 | Perrins Ltd | Procédé et appareil pour la fabrication des tubes |
GB130059A (en) * | 1918-01-10 | 1919-07-31 | John Ernest Raworth | Improvements in Method of Forming Tubular Articles by Extrusion. |
FR1075098A (fr) * | 1953-02-28 | 1954-10-12 | Louvroil Montbard Aulnoye | Procédé de fabrication à chaud de tubes sans soudure |
US4617067A (en) * | 1981-08-06 | 1986-10-14 | Vallourec | Process for the production of semi-finished articles of hard steels using a continuous casting operation |
-
1995
- 1995-06-13 JP JP8501479A patent/JPH10505789A/ja active Pending
- 1995-06-13 BR BR9508017A patent/BR9508017A/pt not_active IP Right Cessation
- 1995-06-13 CN CN95193596A patent/CN1062785C/zh not_active Expired - Fee Related
- 1995-06-13 ES ES95921715T patent/ES2128736T3/es not_active Expired - Lifetime
- 1995-06-13 CA CA002192970A patent/CA2192970A1/en not_active Abandoned
- 1995-06-13 WO PCT/DE1995/000800 patent/WO1995034387A1/de not_active Application Discontinuation
- 1995-06-13 AT AT95921715T patent/ATE176411T1/de not_active IP Right Cessation
- 1995-06-13 CZ CZ963644A patent/CZ364496A3/cs unknown
- 1995-06-13 PL PL95317837A patent/PL178838B1/pl unknown
- 1995-06-13 EP EP95921715A patent/EP0764063B1/de not_active Expired - Lifetime
- 1995-06-13 SK SK1597-96A patent/SK282573B6/sk unknown
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102179681A (zh) * | 2011-03-30 | 2011-09-14 | 盛泽能源技术有限公司 | 一种采用连铸坯周期锻轧毛坯的管模制造工艺 |
CN102179681B (zh) * | 2011-03-30 | 2012-10-17 | 盛泽能源技术有限公司 | 一种采用连铸坯周期锻轧毛坯的管模制造工艺 |
Also Published As
Publication number | Publication date |
---|---|
CN1150767A (zh) | 1997-05-28 |
SK159796A3 (en) | 1997-06-04 |
WO1995034387A1 (de) | 1995-12-21 |
ES2128736T3 (es) | 1999-05-16 |
SK282573B6 (sk) | 2002-10-08 |
CZ364496A3 (cs) | 1998-03-18 |
MX9606085A (es) | 1998-05-31 |
CN1062785C (zh) | 2001-03-07 |
BR9508017A (pt) | 1997-09-02 |
JPH10505789A (ja) | 1998-06-09 |
CA2192970A1 (en) | 1995-12-21 |
PL317837A1 (en) | 1997-04-28 |
PL178838B1 (pl) | 2000-06-30 |
ATE176411T1 (de) | 1999-02-15 |
EP0764063A1 (de) | 1997-03-26 |
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