DE681455C - Covered arc welding electrode for welds with special strength and toughness, the cover of which contains clay and manganese dioxide - Google Patents

Covered arc welding electrode for welds with special strength and toughness, the cover of which contains clay and manganese dioxide

Info

Publication number
DE681455C
DE681455C DEA81644D DEA0081644D DE681455C DE 681455 C DE681455 C DE 681455C DE A81644 D DEA81644 D DE A81644D DE A0081644 D DEA0081644 D DE A0081644D DE 681455 C DE681455 C DE 681455C
Authority
DE
Germany
Prior art keywords
welds
manganese dioxide
toughness
welding electrode
arc welding
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
Application number
DEA81644D
Other languages
German (de)
Inventor
Arnold Mitchell Robert Flixton
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.)
AEG AG
Original Assignee
AEG 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 AEG AG filed Critical AEG AG
Application granted granted Critical
Publication of DE681455C publication Critical patent/DE681455C/en
Expired legal-status Critical Current

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
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
    • B23K35/3601—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest with inorganic compounds as principal constituents
    • B23K35/3607—Silica or silicates

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Nonmetallic Welding Materials (AREA)

Description

lad. Ugesicbm
19 OCT. 1939lad. Ugesicbm
OCT 1939

AUSGEGEBEN AM
23. SEPTEMBER 1939ISSUED ON
SEPTEMBER 23, 1939

Umhüllte Lichtbogenschweißelektroden mit Flußmitteln, die u. a. außer einem Bindemittel Ton -und Mangandioxyd enthalten, sind bekannt.% Mit derartigen Elektroden können Schweißungen mit hoher Festigkeit erzielt werden. Werden an die Schweißungen gleichzeitig hohe Anforderungen bezüglich der Zähigkeit gesteEt, beispielsweise bei der Schweißung von Druckbehältern, so ist der Mangandioxydgehalt wesentlichheraufzusetzen. Die Erfindung betrifft daher eine umhüllte Lichtbogenschweißelektrode für Schweißungen mit besonderer Festigkeit und Zähigkeit, deren Umhüllung Ton und Mangandioxyd enthält, und besteht darin, daß die Umhüllung aus 25 bis 600/0 saurem Ton und 75 bis 400/0 Mangandioxyd besteht. Diese beiden einzigen Komponenten der Umhüllung werden in bekannter Weise mit einem Bindemittel, beispielsweise Natronwasserglas, zu der jeweils erforderlichen Konsistenz angeteigt.Sheathed arc welding electrodes with fluxes which, among other things, contain clay and manganese dioxide in addition to a binder, are known. % With such electrodes, welds with high strength can be achieved. If, at the same time, high demands are placed on the welds in terms of toughness, for example when welding pressure vessels, the manganese dioxide content must be increased significantly. The invention therefore relates to a covered arc welding electrode for welds with particular strength and toughness, the covering of which contains clay and manganese dioxide, and consists in that the covering consists of 25 to 600/0 acid clay and 75 to 400/0 manganese dioxide. These two single components of the casing are made into a paste in a known manner with a binding agent, for example soda waterglass, to the consistency required in each case.

Der nackte Schweißdraht wird, bevor das ■_ Flußmittel aufgebracht wird, zweckmäßig mit einem cellulosehaltigen Material umsponnen oder umklöppelt. Das Flußmittel kann dann in bekannter Weise aufgespritzt wer-den. Für den Schweißdraht verwendet man zweckmäßig einen Stahl der folgenden Zusammensetzung: Kohlenstoff 0,06 bis 05130/0, Mangan 0,3 bis 0,60/0, Silicium, Schwefel;, Phosphor nicht mehr als je 0,040/0, Rest Eisen.The bare welding wire is applied before the ■ _ Flux is applied, expediently wrapped with a cellulosic material or bobbin lace. The flux can then be sprayed on in a known manner. For For the welding wire, it is expedient to use a steel with the following composition: Carbon 0.06 to 05130/0, manganese 0.3 to 0.60 / 0, silicon, sulfur; phosphorus not more than 0.040 / 0 each, remainder iron.

Mit einer derart umhüllten Schweißelektrode werden dichte Schweißungen erzielt, die eine Festigkeit von 47,2 kg, mm2 bei einer Bruchdehnung (δ4) von 300/0 und bei einer Einschnürung von 54°/o aufweisen. Die beschriebenen Elektroden sind besonders geeignet für Schweißungen an Druckgefäßen, Dampfkesseln, Rohrschlangen zur Druckerhitzung, d. h. bei allen Schweißungen, bei denen besondere Anforderungen bezüglich der Dehnung .gestellt sind.With a welding electrode encased in this way, tight welds are achieved which have a strength of 47.2 kg, mm 2 with an elongation at break (δ 4 ) of 300/0 and a constriction of 54%. The electrodes described are particularly suitable for welding on pressure vessels, steam boilers, coiled pipes for pressure heating, ie for all welds for which special requirements are made with regard to elongation.

. Zweckmäßig wird mit Gleichstrom unter Anschluß der Elektrode an-den positiven Pol der Stromquelle geschweißt unter Aufrechterhaltung eines kurzen Lichtbogens. Die Schweißstromstärken liegen zwischen 45 und 220 Amp. bei Schweißdrahtdurchmessern von 2,0 bis 5,9 mm. Beim Verschweißen zweier Bleche von 3,175 mm (Y8 Zoll) verwendet man z. B. eine Elektrode mit einem Schweißdrahtdurchmesser von 3,25 mm bei einer Stromstärke von 70 Amp. Für ι m Schweißung benötigt man etwa 7,6 Minuten und 1500 mm Elektrode.. It is expedient to weld with direct current with connection of the electrode to the positive pole of the power source while maintaining a short arc. The welding currents are between 45 and 220 amps with welding wire diameters of 2.0 to 5.9 mm. When welding two sheets of 3.175 mm (Y 8 inches) z. B. an electrode with a welding wire diameter of 3.25 mm at a current of 70 Amp. For ι m welding you need about 7.6 minutes and 1500 mm electrode.

Claims (2)

Patentansprüche:Patent claims: 1. Umhüllte Lichtbogenschweißelektrode für Schweißungen mit besonderer Festigkeit und Zähigkeit, deren Umhüllung Ton und Mangandioxyd enthält, dadurch gekennzeichnet; daß die Umhüllung aus 25 bis 600/0 saurem Ton und 75 bis 400/0 Mangandioxyd besteht.1. Covered arc welding electrode for welds with particular strength and toughness, the coating of which contains clay and manganese dioxide, characterized in that; that the wrapping off 25 to 600/0 sour clay and 75 to 400/0 Manganese dioxide consists. 2. Schweißelektrode nach Anspruch. 1, ' dadurch -gekennzeichnet, daß der nackte Schweißdraht vor Umhüllung mit dem Flußmittel mit einem cellulosehaltigen Material umgeben ist.2. Welding electrode according to claim. 1, ' characterized in that the bare welding wire before sheathing with the Flux is surrounded with a cellulosic material.
DEA81644D 1936-01-08 1937-01-09 Covered arc welding electrode for welds with special strength and toughness, the cover of which contains clay and manganese dioxide Expired DE681455C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB681455X 1936-01-08

Publications (1)

Publication Number Publication Date
DE681455C true DE681455C (en) 1939-09-23

Family

ID=10492483

Family Applications (1)

Application Number Title Priority Date Filing Date
DEA81644D Expired DE681455C (en) 1936-01-08 1937-01-09 Covered arc welding electrode for welds with special strength and toughness, the cover of which contains clay and manganese dioxide

Country Status (1)

Country Link
DE (1) DE681455C (en)

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