DE643449C - Covered electrode for electric arc welding of aluminum or aluminum alloys - Google Patents

Covered electrode for electric arc welding of aluminum or aluminum alloys

Info

Publication number
DE643449C
DE643449C DEA68499D DEA0068499D DE643449C DE 643449 C DE643449 C DE 643449C DE A68499 D DEA68499 D DE A68499D DE A0068499 D DEA0068499 D DE A0068499D DE 643449 C DE643449 C DE 643449C
Authority
DE
Germany
Prior art keywords
aluminum
arc welding
electric arc
covered electrode
alloys
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
DEA68499D
Other languages
German (de)
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.)
LOULIS ANASTASIADIS DR
Original Assignee
LOULIS ANASTASIADIS DR
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 LOULIS ANASTASIADIS DR filed Critical LOULIS ANASTASIADIS DR
Priority to DEA68499D priority Critical patent/DE643449C/en
Application granted granted Critical
Publication of DE643449C publication Critical patent/DE643449C/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
    • B23K35/3603—Halide salts

Landscapes

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

Description

Die Erfindung betrifft umhüllte Elektroden für die elektrische Lichtbogenschweißung von Aluminium oder Aluminiumlegierungen mit einem aus Aluminium oder Aluminiumlegierungen bestehenden Metallkern. Zum Schweißen von Aluminium werden Flußmittel verwendet, die das stets vorhandene Aluminiumoxyd zu lösen vermögen und hauptsächlich aus Halogeniden der Alkalimetalle bestehen. Ferner sind auch umhüllte Elektroden für die elektrische Lichtbogenschweißung von Aluminium und seinen Legierungen bekannt, deren Umhüllung Halogenide der Alkalimetalle und Kryolith oder Holzkohle oder Sagemehl enthält. Diesen Elektroden haftet eine Reihe von Mängeln an; vor allem setzt der Schweißprozeß erst nach einer längeren Zeit der Vorwärmung des Werkstückes ein, und die Schweißung selbst fällt infolge von starker Tropfenbildung und der Unstabilität des Lichtbogens unvollkommen aus.The invention relates to coated electrodes for the electric arc welding of Aluminum or aluminum alloys with one of aluminum or aluminum alloys existing metal core. Fluxes that are always present are used to weld aluminum Able to dissolve aluminum oxide and mainly from halides of alkali metals exist. There are also coated electrodes for electric arc welding known from aluminum and its alloys, the coating of which is halides of alkali metals and cryolite or Contains charcoal or sawdust. A number of deficiencies are inherent in these electrodes at; above all, the welding process does not start until after a long period of preheating of the workpiece, and the weld itself falls as a result of heavy drop formation and the instability of the arc imperfectly.

Die Erfindung schafft hierin Wandel, da sie umhüllte Elektroden aus Aluminium oder Aluminiumlegierungen zum Gegenstande hat, bei denen alle früheren Mängel der Lichtbogenschweißung von Aluminium nicht auftreten. Die Elektroden nach der Erfindung besitzen eine Umhüllung, die aus 50 bis 60 o/o KCl, 20 bis 300/0 LiF, 10 bis 20 o/o NaCl-AlCl3, 0,5 bis 7 o/o NaF besteht. Die Bestandteile werden durch Wasserzusatz in Pastenform gebracht und so auf den Draht aufgetragen. Diese Umhüllung erfüllt alle Anforderungen, die an sie gestellt werden 3,= müssen, und gewährleistet eine vollkommen einwandfreie und leicht auszuführende Schweißung von Aluminium und seinen Legierungen. Die Paste ist selbstbindend, nicht hygroskopisch, haftet fest an den Elektroden und besitzt gute mechanische Eigenschaften. Während des Schweißvorganges selbst wird die Umhüllung, ehne frühzeitig abzubröckeln, gleichmäßig mit dem Schweißstab abgeschmolzen, bedeckt so die entstehende Raupe und bewirkt außerdem das leichte Aufrechterhalten eines stabilen Lichtbogens, wodurch eine gleichmäßige Raupe von Beginn der Schweißung an besteht, ohne daß eine Vorwärmung des Werkstückes notwendig ist.The invention transforms this by providing encapsulated electrodes made of aluminum or aluminum alloys which do not exhibit all of the prior deficiencies in the arc welding of aluminum. The electrodes according to the invention have a covering which consists of 50 to 60 o / o KCl, 20 to 300/0 LiF, 10 to 20 o / o NaCl-AlCl 3 , 0.5 to 7 o / o NaF. The ingredients are made into a paste by adding water and thus applied to the wire. This envelope meets all the requirements that must be placed on it 3, and guarantees a perfectly flawless and easy-to-perform welding of aluminum and its alloys. The paste is self-binding, not hygroscopic, adheres firmly to the electrodes and has good mechanical properties. During the welding process itself, the coating is melted evenly with the welding rod without crumbling off prematurely, thus covering the resulting bead and also making it easy to maintain a stable arc, whereby a uniform bead exists from the start of welding without preheating the workpiece necessary is.

Die von diesen umhüllten Elektroden auf der Schweißnaht gebildete Schlacke ist auch nach dem Anfeuchten mit Wasser nur schwer durch Abbürsten zu entfernen. Setzt man jedoch der oben beschriebenen Paste bis zu 2 0/0 Bichromat hinzu, z.B. 1 o/o K2Cr2O7, so wird die Schlacke porös und läßt sich nach dem Anfeuchten mit Wasser leicht ablösen.The slag formed on the weld seam by these encased electrodes is difficult to remove by brushing, even after it has been moistened with water. However, one set of the paste described above, up to 2 0/0 bichromate added, for example 1 o / o K 2 Cr 2 O 7, the slag is porous and can be determined by moistening with water easily detached.

Claims (2)

Patentansprüche:Patent claims: i. Umhüllte Elektrode für die elektrische Lichtbogenschweißung von AIu-i. Covered electrode for electric arc welding of aluminum minium oder Aluminiumlegierungen mit einem aus Aluminium oder einer Aluminiumlegierung bestehenden Metallkern, dadurch gekennzeichnet, daß die Umhüllung aus 50 bis 60 O0 KCl, 20 bis·; 300/0 LiF, 10 bis 200/0 NaCl-AlCl3, 0,5 bis 7 0/0 Na F besteht.minium or aluminum alloys with a metal core consisting of aluminum or an aluminum alloy, characterized in that the casing is made of 50 to 60 O 0 KCl, 20 to ·; 300/0 LiF, 10 to 200/0 NaCl-AlCl 3 , 0.5 to 7 0/0 Na F. 2. Umhüllte Elektrode nach Anspruch 1, dadurch gekennzeichnet, daß die Umhüllung bis zu 2 o'o Bichromat enthält.2. Covered electrode according to claim 1, characterized in that the cover Contains up to 2 o'o bichromate. Rr:iciisniu'CKr:i(i-:iRr: iciisniu'CKr: i (i-: i
DEA68499D 1933-02-01 1933-02-01 Covered electrode for electric arc welding of aluminum or aluminum alloys Expired DE643449C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEA68499D DE643449C (en) 1933-02-01 1933-02-01 Covered electrode for electric arc welding of aluminum or aluminum alloys

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA68499D DE643449C (en) 1933-02-01 1933-02-01 Covered electrode for electric arc welding of aluminum or aluminum alloys

Publications (1)

Publication Number Publication Date
DE643449C true DE643449C (en) 1937-04-08

Family

ID=6944707

Family Applications (1)

Application Number Title Priority Date Filing Date
DEA68499D Expired DE643449C (en) 1933-02-01 1933-02-01 Covered electrode for electric arc welding of aluminum or aluminum alloys

Country Status (1)

Country Link
DE (1) DE643449C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE974441C (en) * 1943-07-10 1960-12-22 Kjellberg Esab G M B H Sheathed arc welding electrode made of aluminum or aluminum alloys

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE974441C (en) * 1943-07-10 1960-12-22 Kjellberg Esab G M B H Sheathed arc welding electrode made of aluminum or aluminum alloys

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