DE2545075A1 - Inductive preheating of wire or strip welding electrodes - before immersion in melting bath or before arc ignition - Google Patents
Inductive preheating of wire or strip welding electrodes - before immersion in melting bath or before arc ignitionInfo
- Publication number
- DE2545075A1 DE2545075A1 DE19752545075 DE2545075A DE2545075A1 DE 2545075 A1 DE2545075 A1 DE 2545075A1 DE 19752545075 DE19752545075 DE 19752545075 DE 2545075 A DE2545075 A DE 2545075A DE 2545075 A1 DE2545075 A1 DE 2545075A1
- Authority
- DE
- Germany
- Prior art keywords
- wire
- electrodes
- welding
- preheating
- melting bath
- 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.)
- Pending
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
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
Abstract
Description
fnduktiverwärmung von Draht und Bandelektroden für alle Induction heating of wire and strip electrodes for everyone
elektrischen Licht#>ogenschweißverfahren. sowie für I)rahtelektroden der Xlektro-Schlacke-Schweißung.electric light #> arc welding process. as well as for I) wire electrodes the Xlektro-slag welding.
Die Erfindung betrifft eine induktive Erwärmung von Draht- und Handelektroden aller bekannten und angewendeten Metall-Lichtbogen-Schweißverfahren, sowie der Elektro-Schlacke-Schweißung.The invention relates to inductive heating of wire and hand electrodes all known and used metal arc welding processes, as well as electro-slag welding.
Schweißverfahren: Metall-Aktiv-Schweißung ( MAG ) Hetall-Inert-Schweißung ( MIG Wolfram-Inertgas-Schweißung ( WIG ) Unterpulverschweißung ( UP ) Fülldraht-Schweißung,mit oder ohne Schutzgas.Welding process: Metal active welding (MAG) Hetall inert welding (MIG tungsten inert gas welding (TIG) submerged arc welding (UP) cored wire welding, with or without protective gas.
Elektro-Schlacke-Schweißung ( ES ) Bei den vorgenannten Schweißverfahren ist der elektrische Lichtbogen der Energieträger und bewirkt das abschmelzen der Draht-und Bandelektroden. Electro-slag welding (ES) In the aforementioned welding processes The electric arc is the energy carrier and causes the melting of the Wire and tape electrodes.
Ausgenommen ist die Elektro-Schlacke-Schweißung, bei welcher der Abschmelzprozess der Drahtelektroden über eine flüssige,elektrisch leitende Schlacke erfolgt. Eine Erhöhung der Abschmelzleistung (kp/h) erfolgt, auch bei Mehrdrahtschweißungen, über eine Erhöhung der Schweißstromwerte. Hiebei wird gleichzeitig eine, oft unerwünscht, Erhöhung der Streckenenergie ( J/cm) erreicht, die unter anderem zu negativer Beeinflussung des zu schweißenden Grundwerkstoffes führen kann.(Wärmebeeinflusste-Zone~) Ferner wird insbesondere bei der Verschweißung legierter und tochlegierter Werkstoffe,ein übermäßiges Abbrennen einzelner Legierungsbestandteile erreicht. Bei Auftragungsschweißungen ( Schweißplattierungen mit Draht- und Bandelektroden, wird durch Erhöhung der Schweißstrom-Spannungs-Parameter eine unerwünschte lourchmischung ( Verdünnung ) der Plattierungsschicht verzeichnet. Bei der Elektro-Schlacke-Schweißung wird der,oder die elektrisch leitende Schlacke geführt. Eine Vorwärmung in der beschriebenen Weise, wird auch hier die Abschmelzleistung erhöhen. Bin weiterer Vorteil der Induktiverwärmung, insbesondere bei Fülldraht-Elektroden besteht in der Trocknung der oft hygroskopischen Flußmittelfüllung der Fülldrähte. Bisher ist es schwierig oder ganz unmöglich, gefalzte Fülidrähte nach Lagerung bei hoher Luftfeuchtigkeit ( Tropen, Werftbetriebe)fehlerfrei zu verschweißen. Die Flußmittelfüllung der Fülidrähte nimmt Luftfeuchtigkeit auf, die beim Verschweißen im Schweißbad nicht restlos ausgasen kann und zu Poren und Rissen führt, Der Erfindung liegt die Aufgabe zugrunde, bei den oben beschriebenen Schweißverfahren, die Draht-oder Bandelctroden vor Eintauchen in das Schmelzbad, bzw. vor Zündung des Lichtbogens, induktiv zu erwärmen. Diese Aufgabe wird erfindungsmäßig dadurch gelöst, daß die Draht- oder Bandelektroden zwischen Schweißstromkontakt und Werkstückoberfläche eine Induktionsschleife durchlaufen. Die dabei erreichbare Erwärmung ( Vorwärmung ) ist variabel und kann je nach Schweißverfahren und Legierungszu-0 sammensetzung, stufenlos auf ca. 1000 0 C gebracht werden, Dadurch wird erreicht, daß bei gleicher oder geringerer Schweißstromstärke die Abschmelzleistung erhöht, bzw. nicht verringert wird. Gleichzeitig wird die beschriebene Wärmebeeinflußte-Zone des Grundwerkstoffes verkleinert.The exception is electro-slag welding, in which the melting process of the wire electrodes takes place via a liquid, electrically conductive slag. One Increase in the deposition rate (kp / h) takes place, even with multi-wire welds, over an increase in the welding current values. At the same time, an often undesirable Increase in energy per unit length (J / cm) is achieved, which among other things has a negative impact of the base material to be welded (heat-affected zone ~) is used especially when welding alloyed and hot-alloyed materials Excessive burning off of individual alloy components achieved. With surfacing (Weld cladding with wire and strip electrodes is achieved by increasing the welding current-voltage parameters recorded undesirable lourch mixing (thinning) of the cladding layer. In the case of electro-slag welding, the or the electrically conductive slag guided. Preheating in the manner described is also the deposition rate here raise. Another advantage of inductive heating, especially with cored wire electrodes consists in the Drying of the often hygroscopic flux filling of the cored wires. So far it has been difficult or even impossible to use folded filler wires to be flawlessly welded after storage in high humidity (tropics, shipyards). The flux filling of the filler wires absorbs air humidity that occurs during welding cannot completely outgas in the weld pool and leads to pores and cracks, the invention is the underlying task in the welding process described above, the wire or Strip electrodes before immersion in the weld pool or before ignition of the arc, to be heated inductively. This object is achieved according to the invention in that the Wire or strip electrodes between welding current contact and workpiece surface go through an induction loop. The heating that can be achieved (preheating ) is variable and depending on the welding process and alloy composition, can be brought steplessly to approx. 1000 0 C, thereby achieving that with the same or lower welding current strength, the deposition rate increases or does not decrease will. At the same time, the heat-affected zone of the base material is described scaled down.
Das Abbrennen der Legierungselemente, bei den Zusatz-Draht-oder Handelektroden wird vermindert. Insbesonders aber bei Auftrags-Schweißungen ( Plattierungen ), wird durch geringeren Einbrand ein Abbau der Legierungselemente durch zu starke Vermischung(Verdünnung ) mit dem Grtindwerkstoff vermieden.Burning off the alloying elements in the case of the additional wire or hand electrodes is diminished. But especially with build-up welds (cladding), If the penetration is too low, the alloying elements are degraded due to excessive penetration Mixing (dilution) with the ground material avoided.
Patentansprüche,Claims,
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19752545075 DE2545075A1 (en) | 1975-10-08 | 1975-10-08 | Inductive preheating of wire or strip welding electrodes - before immersion in melting bath or before arc ignition |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19752545075 DE2545075A1 (en) | 1975-10-08 | 1975-10-08 | Inductive preheating of wire or strip welding electrodes - before immersion in melting bath or before arc ignition |
Publications (1)
Publication Number | Publication Date |
---|---|
DE2545075A1 true DE2545075A1 (en) | 1977-04-14 |
Family
ID=5958646
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19752545075 Pending DE2545075A1 (en) | 1975-10-08 | 1975-10-08 | Inductive preheating of wire or strip welding electrodes - before immersion in melting bath or before arc ignition |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE2545075A1 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009109409A2 (en) * | 2008-02-29 | 2009-09-11 | Siemens Aktiengesellschaft | Potential-free wire heating during welding and device therefor |
US8653417B2 (en) | 2009-01-13 | 2014-02-18 | Lincoln Global, Inc. | Method and system to start and use a combination filler wire feed and high intensity energy source |
US9085041B2 (en) | 2009-01-13 | 2015-07-21 | Lincoln Global, Inc. | Method and system to start and use combination filler wire feed and high intensity energy source for welding |
US9498838B2 (en) | 2013-07-24 | 2016-11-22 | Lincoln Global, Inc. | System and method of controlling heat input in tandem hot-wire applications |
US10086461B2 (en) | 2009-01-13 | 2018-10-02 | Lincoln Global, Inc. | Method and system to start and use combination filler wire feed and high intensity energy source for welding |
US10464168B2 (en) | 2014-01-24 | 2019-11-05 | Lincoln Global, Inc. | Method and system for additive manufacturing using high energy source and hot-wire |
US11027362B2 (en) | 2017-12-19 | 2021-06-08 | Lincoln Global, Inc. | Systems and methods providing location feedback for additive manufacturing |
DE102022112983A1 (en) | 2022-05-23 | 2023-11-23 | AWS Schäfer Technologie GmbH | Process for submerged arc welding |
-
1975
- 1975-10-08 DE DE19752545075 patent/DE2545075A1/en active Pending
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009109409A2 (en) * | 2008-02-29 | 2009-09-11 | Siemens Aktiengesellschaft | Potential-free wire heating during welding and device therefor |
EP2100687A1 (en) * | 2008-02-29 | 2009-09-16 | Siemens Aktiengesellschaft | Potential-free wire heating during welding and device for this purpose |
WO2009109409A3 (en) * | 2008-02-29 | 2009-11-05 | Siemens Aktiengesellschaft | Potential-free wire heating during welding and device therefor |
US8653417B2 (en) | 2009-01-13 | 2014-02-18 | Lincoln Global, Inc. | Method and system to start and use a combination filler wire feed and high intensity energy source |
US9085041B2 (en) | 2009-01-13 | 2015-07-21 | Lincoln Global, Inc. | Method and system to start and use combination filler wire feed and high intensity energy source for welding |
US9782850B2 (en) | 2009-01-13 | 2017-10-10 | Lincoln Global, Inc. | Method and system to start and use combination filler wire feed and high intensity energy source for welding |
US10086461B2 (en) | 2009-01-13 | 2018-10-02 | Lincoln Global, Inc. | Method and system to start and use combination filler wire feed and high intensity energy source for welding |
US9498838B2 (en) | 2013-07-24 | 2016-11-22 | Lincoln Global, Inc. | System and method of controlling heat input in tandem hot-wire applications |
US10464168B2 (en) | 2014-01-24 | 2019-11-05 | Lincoln Global, Inc. | Method and system for additive manufacturing using high energy source and hot-wire |
US11027362B2 (en) | 2017-12-19 | 2021-06-08 | Lincoln Global, Inc. | Systems and methods providing location feedback for additive manufacturing |
DE102022112983A1 (en) | 2022-05-23 | 2023-11-23 | AWS Schäfer Technologie GmbH | Process for submerged arc welding |
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Legal Events
Date | Code | Title | Description |
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OGA | New person/name/address of the applicant | ||
OHJ | Non-payment of the annual fee |