DE2709601B1 - APPLICATION OF THE PROCEDURE ACCORDING TO DT-AS 1237241 FOR ELECTRIC SEAM WELDING OF STEEL PIPES - Google Patents
APPLICATION OF THE PROCEDURE ACCORDING TO DT-AS 1237241 FOR ELECTRIC SEAM WELDING OF STEEL PIPESInfo
- Publication number
- DE2709601B1 DE2709601B1 DE19772709601 DE2709601A DE2709601B1 DE 2709601 B1 DE2709601 B1 DE 2709601B1 DE 19772709601 DE19772709601 DE 19772709601 DE 2709601 A DE2709601 A DE 2709601A DE 2709601 B1 DE2709601 B1 DE 2709601B1
- Authority
- DE
- Germany
- Prior art keywords
- parts
- another
- application
- steel pipes
- edge zones
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K13/00—Welding by high-frequency current heating
- B23K13/01—Welding by high-frequency current heating by induction heating
- B23K13/02—Seam welding
- B23K13/025—Seam welding for tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/0006—Resistance welding; Severing by resistance heating the welding zone being shielded against the influence of the surrounding atmosphere
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/16—Resistance welding; Severing by resistance heating taking account of the properties of the material to be welded
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
- Heat Treatment Of Articles (AREA)
Description
bis zu wenigen '/ioo% up to a few '/ ioo%
übliche herstellungsbedingte Verunreinigungen und Rest Eisen.Usual production-related impurities and the remainder iron.
2. Anwendung des Verfahrens nach Anspruch 1 auf Stähle folgender Zusammensetzungsbereiche:2. Application of the method according to claim 1 to steels with the following composition ranges:
Kohlenstoff
Mangan
Silizium
Aluminium
Kupfer
Chrom
Molybdän
Nickelcarbon
manganese
silicon
aluminum
copper
chrome
molybdenum
nickel
M ikrolegierungselemen te
einzeln und/oder in der
Gesamtheit
StickstoffMicro-alloy elements
individually and / or in the
entirety
nitrogen
bis 0,8%
bis 2,0%
bis 0,7%
bis 0,15%
bis 0,8%
bis 1,0%
bis 0,5%
bis 0,5%
bis zu wenigenup to 0.8%
up to 2.0%
up to 0.7%
up to 0.15%
up to 0.8%
up to 1.0%
up to 0.5%
up to 0.5%
up to a few
'/10%'/ 10%
bis 0,025%up to 0.025%
übliche herstellungsbedingte Verunreinigungen und Rest Eisen.Usual production-related impurities and the remainder iron.
3. Anwendung des Verfahrens nach Anspruch 1 auf Stähle folgender Zusammensetzungsbereiche:3. Application of the method according to claim 1 to steels with the following composition ranges:
Kohlenstoffcarbon
Manganmanganese
Siliziumsilicon
Aluminiumaluminum
Kupfercopper
Chromchrome
Molybdänmolybdenum
bis O,4o/o bis 1,8% bis 0,5% bis 0,1% bis 0,4% bis 03%
bis 0,080/o Nickel
Mikrolegierungselementeto 0.4% to 1.8% to 0.5% to 0.1% to 0.4% to 03% to 0.080 / o nickel
Micro-alloy elements
einzeln und/oder in derindividually and / or in the
Gesamtheitentirety
bis 0,3%up to 0.3%
bis zu wenigenup to a few
1/10%1/10%
übliche herstellungsbedingte Verunreinigungen und Rest Eisen.Usual production-related impurities and the remainder iron.
Die Erfindung betrifft die Anwendung des Verfahrens nach DT-AS 12 37 241 zum elektrischen Nahtschweißen von Stahlrohren. Dieses Verfahren gestattet es, Nahtschweißungen mit Geschwindigkeiten vorzunehmen, wie sie allein beim Preßschweißen erreicht werden und die etwa bis 20mal so groß sind, wie beim Schmelzschweißen, z. B. dem Lichtbogenschweißen. Das Verfahren ist schon deswegen außerordentlich wirtschaftlich.The invention relates to the use of the method according to DT-AS 12 37 241 for electrical seam welding of steel pipes. This method allows seam welds to be made at speeds as they are achieved with pressure welding alone and which are up to 20 times as large as with Fusion welding, e.g. B. arc welding. For that reason alone, the procedure is extraordinary economically.
Der vorgenannten Auslegeschrift ist darüber hinaus unter anderem noch zu entnehmen, daß der Schweißprozeß in an sich bekannter Weise auch unter Schutzgas erfolgen kann. Die Anwendung von Schutzgas beim Widerstandsschweißen ist aber bislang nur für legierte Stähle bekanntgeworden.In addition, it can be inferred from the aforementioned interpretation, among other things, that the welding process can also be carried out in a manner known per se under protective gas. The use of protective gas during However, resistance welding has so far only become known for alloy steels.
Die Aufgabe der Erfindung ist das Herstellen von widerstandsnahtgeschweißten Präzisionsrohren höchster Qualität, die weitgehend aus unlegiertem Stahl bestehen und z. B. durch Kaltziehen fertigbearbeitet werden.The object of the invention is to manufacture high-precision, resistance-welded tubes Quality that consists largely of carbon steel and z. B. finished by cold drawing will.
Die Erfindung besteht darin, das bekannte Verfahren zum Nahtschweißen unter Einsatz von Schutzgas bei der Herstellung von Rohren aus sogenannten unlegierten Stählen im Analysenbereich entsprechend den Angaben im Hauptanspruch zu verwenden. Vorteilhaft ist die Anwendung des Verfahrens entsprechend den Unteransprüchen bei der Herstellung von Präzisionsrohren, die nach dem Nahtschweißen kaltgezogen werden.The invention consists in the known method for seam welding using protective gas the production of pipes from so-called unalloyed steels in the analysis area according to the To use information in the main claim. It is advantageous to use the method according to Subclaims in the manufacture of precision tubes that are cold drawn after seam welding will.
Beim herkömmlichen Preßschweißen werden Gefügezeilen und durch das Walzen des Bandes zellenförmig eingelagerte Verunreinigungen, z. B. Oxidzeilen, aufgebogen. Im ungünstigsten Fall treten die zellenförmig eingelagerten Verunreinigungen neben der Naht an die Rohroberfläche, was aus Qualitätsgründen bei hochwertigen Rohren unerwünscht ist. Die Qualitätsminderung im Nahtbereich gegenüber der des Grundwerkstoffes wirkt sich insbesondere bei Beanspruchungen, die tangentiale Zugspannungen erzeugen, aus. Darüber hinaus wird das aufgeschmolzene Material nicht herausgepreßt, wie üblicherweise beim Preßschweißen, so daß der Nahtbereich einen größeren Wärmeinhalt besitzt und der Härteverlauf von der Naht in den Grundwerkstoff flacher verläuft.With conventional pressure welding, structural lines and the rolling of the strip are cellular embedded impurities, e.g. B. oxide lines, bent up. In the worst case, they occur in cells stored impurities next to the seam on the pipe surface, which for quality reasons with high-quality Pipes is undesirable. The reduction in quality in the seam area compared to that of the base material has a particular effect on loads that generate tangential tensile stresses. About that In addition, the melted material is not pressed out, as is usually the case with pressure welding, so that the seam area has a greater heat content and the hardness curve from the seam to the Base material is flatter.
Nunmehr ist darüber hinaus festgestellt worden, daß die Anwendung von Schutzgas bei dem vorbekannten Verfahren beim Schweißen unlegierter Stähle ebenfalls eine Qualitätsverbesserung des Nahtbereiches gegenüber der Qualität der Rohre, die ohne Anwendung von Schutzgas geschweißt worden sind, bewirkt. Diese technische Verbesserung der Rohrqualität ist überraschend. Sie wird erst durch das für die in Rede stehenden Stahlsorten ungewöhnliche Abdecken der Randzonen während des Erwärmens und des Erstarrens mit Schutzgas erreicht. Der Inhalt der Vorveröffentlichung läßt eine derartige Qualitätsverbesserung nicht erwarten. Die technische Verbesserung wirkt sich beispielsweise dadurch aus, daß solche Rohrqualitäten erzeugtIt has now also been found that the use of protective gas in the previously known Process when welding unalloyed steels also improves the quality of the seam area the quality of the pipes that have been welded without the use of shielding gas. These technical improvement in pipe quality is surprising. You will only get through this for the one in question Steel types with unusual covering of the edge zones during heating and solidification Protective gas reached. The content of the prior publication does not suggest such an improvement in quality. The technical improvement has an effect, for example, in that such pipe qualities are produced
werden können, daß das nachfolgende Kaltziehen ohne Zwischenglühung mit großen Verformungen erfolgen kann. Der erreichte Vorteil wiegt den Aufwand für das Schutzgas wirtschaftlich reichlich auf.that the subsequent cold drawing can be carried out without intermediate annealing with large deformations can. The advantage achieved economically well outweighs the cost of the protective gas.
Ein Anwendungsbeispiel ist folgendes:An application example is the following:
Aus gespaltenem Warmbreitband mit der Stahlzusammensetzung Kohlenstoff 0,23%, Mangan 0,55% und Aluminium 0,055%, wird eine Luppe 53 χ 2,5 mm geschweißt und daraus ein Rohr 45 χ 2 mm gezogen. Die Rohre werden im zugblanken Zustand aufgeweitet. Vergleichsrohre aus preßgeschweißten Luppen erreichen Aufweitewerte von 15% im Mittel. Rohre unter Anwendung des gattungsbildenden Schweißverfahrens mit Schutzgasabdeckung, was bei einem derartigen Stahl ungewöhnlich ist, erreichen Aufweitewerte von 21% im Mittel.Made of split hot wide strip with the steel composition carbon 0.23%, manganese 0.55% and Aluminum 0.055%, a billet 53 2.5 mm is welded and a tube 45 χ 2 mm is drawn from it. The pipes are widened in their bare condition. Achieve comparison tubes from pressure-welded blanks Expansion values of 15% on average. Pipes using the generic welding process with protective gas cover, which is unusual for such a steel, achieve expansion values of 21% on average.
Claims (1)
bis 0,7%
bis 0,15%
bis 0,8%
bis 3,5%
bis 1,2%
bis 5,5O/o
bis zu wenigen0.005 to 1.0 / o 0.1 to 2.0%
up to 0.7%
up to 0.15%
up to 0.8%
up to 3.5%
up to 1.2%
up to 5.5O / o
up to a few
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2709601A DE2709601C2 (en) | 1977-03-03 | 1977-03-03 | Application of the procedure according to DT-AS 1237241 for the electrical seam welding of steel pipes |
IT20321/78A IT1093106B (en) | 1977-03-03 | 1978-02-16 | PROCEDURE FOR THE ELECTRIC WELDING OF STEEL PIPES |
GB7100/78A GB1601662A (en) | 1977-03-03 | 1978-02-22 | Process for electrically butt-seam welding steel tubes |
FR7806017A FR2382303A1 (en) | 1977-03-03 | 1978-03-02 | PROCESS FOR ELECTRICAL WELDING STEEL TUBES |
JP2403678A JPS53108871A (en) | 1977-03-03 | 1978-03-02 | Electric welding for steel pipe |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2709601A DE2709601C2 (en) | 1977-03-03 | 1977-03-03 | Application of the procedure according to DT-AS 1237241 for the electrical seam welding of steel pipes |
Publications (2)
Publication Number | Publication Date |
---|---|
DE2709601B1 true DE2709601B1 (en) | 1977-12-01 |
DE2709601C2 DE2709601C2 (en) | 1978-07-27 |
Family
ID=6002829
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE2709601A Expired DE2709601C2 (en) | 1977-03-03 | 1977-03-03 | Application of the procedure according to DT-AS 1237241 for the electrical seam welding of steel pipes |
Country Status (5)
Country | Link |
---|---|
JP (1) | JPS53108871A (en) |
DE (1) | DE2709601C2 (en) |
FR (1) | FR2382303A1 (en) |
GB (1) | GB1601662A (en) |
IT (1) | IT1093106B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2419134A1 (en) * | 1978-03-07 | 1979-10-05 | Carnaud Sa | METHOD AND DEVICE FOR WELDING UNDER A CONTROLLED ATMOSPHERE ON WHEEL MACHINES |
FR2471832A1 (en) * | 1979-12-19 | 1981-06-26 | Opprecht Paul | METHOD AND INSTALLATION FOR PREVENTING THE OXIDATION OF THE JOINT OBTAINED BY WELDING BY RESISTANCE BETWEEN ROLLERS |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100632003B1 (en) * | 2005-08-08 | 2006-10-09 | 삼성전기주식회사 | Led package having recess in heat transfer part |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1176199A (en) * | 1956-06-22 | 1959-04-07 | Combustion Eng | Improvements to welding processes and devices |
DE1237241B (en) * | 1964-02-14 | 1967-03-23 | Mannesmann Ag | Process for the electrical seam welding of steel pipes |
JPS5217509B2 (en) * | 1972-09-18 | 1977-05-16 | ||
US3955971A (en) * | 1974-12-11 | 1976-05-11 | United States Steel Corporation | Alloy steel for arctic service |
JPS51145454A (en) * | 1975-06-10 | 1976-12-14 | Nippon Steel Corp | Method for manufacture of electriccweld steel pipe |
-
1977
- 1977-03-03 DE DE2709601A patent/DE2709601C2/en not_active Expired
-
1978
- 1978-02-16 IT IT20321/78A patent/IT1093106B/en active
- 1978-02-22 GB GB7100/78A patent/GB1601662A/en not_active Expired
- 1978-03-02 JP JP2403678A patent/JPS53108871A/en active Pending
- 1978-03-02 FR FR7806017A patent/FR2382303A1/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2419134A1 (en) * | 1978-03-07 | 1979-10-05 | Carnaud Sa | METHOD AND DEVICE FOR WELDING UNDER A CONTROLLED ATMOSPHERE ON WHEEL MACHINES |
FR2471832A1 (en) * | 1979-12-19 | 1981-06-26 | Opprecht Paul | METHOD AND INSTALLATION FOR PREVENTING THE OXIDATION OF THE JOINT OBTAINED BY WELDING BY RESISTANCE BETWEEN ROLLERS |
Also Published As
Publication number | Publication date |
---|---|
IT7820321A0 (en) | 1978-02-16 |
GB1601662A (en) | 1981-11-04 |
IT1093106B (en) | 1985-07-19 |
FR2382303A1 (en) | 1978-09-29 |
FR2382303B1 (en) | 1981-10-02 |
JPS53108871A (en) | 1978-09-22 |
DE2709601C2 (en) | 1978-07-27 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8339 | Ceased/non-payment of the annual fee |