CH405533A - Coated electrode for arc welding of aluminum and aluminum alloys - Google Patents

Coated electrode for arc welding of aluminum and aluminum alloys

Info

Publication number
CH405533A
CH405533A CH223863A CH223863A CH405533A CH 405533 A CH405533 A CH 405533A CH 223863 A CH223863 A CH 223863A CH 223863 A CH223863 A CH 223863A CH 405533 A CH405533 A CH 405533A
Authority
CH
Switzerland
Prior art keywords
aluminum
ions
sep
coated electrode
coating
Prior art date
Application number
CH223863A
Other languages
French (fr)
Original Assignee
Castolin Soudures Sa
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 Castolin Soudures Sa filed Critical Castolin Soudures Sa
Priority to CH223863A priority Critical patent/CH405533A/en
Priority to NL6401482A priority patent/NL6401482A/xx
Priority to DE1964S0089588 priority patent/DE1483481A1/en
Priority to FR20475A priority patent/FR1383442A/en
Priority to SE208064A priority patent/SE321750B/xx
Priority to BE644150A priority patent/BE644150A/fr
Publication of CH405533A publication Critical patent/CH405533A/en

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
    • B23K35/3605—Fluorides
    • 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

Description

  

  Electrode enrobée pour la soudure à l'arc d'aluminium et des alliages d'aluminium    La     présente        invention    a pour objet une     électrode     enrobée pour la soudure à l'arc     électrique    de     l'alu-          minium    et de ses     alliages.     



  Pour l'obtention d'un cordon de soudure impec  cable     particulièrement        brillant    au     moyen    d'une élec  trode à base     d'aluminium    ou     d'alliage        :d'aluminium,     on     utilise    en général ces     électrodes    en conjonction  avec des     flux    capables de dissoudre l'oxyde     d'alumi-          nium    qui se     forme    au     cours    du soudage.

   Les flux     ont          également    pour tâche de     stabiliser    .et d'ioniser     l'arc    et  de     faciliter        l'élimination    des scories du dépôt de sou  dure. On     utilise        généralement    à     cet    effet des mélan  ges semi-fluides, pâteux ou poudreux de chlorures et  fluorures des métaux alcalins et/ou alcalino-terreux.

    Ces mélanges présentent en général     une        hygroscopi-          cité        assez    prononcée, de     sorte    que     lorsqu'on    les uti  lise sous forme d'enrobages, les électrodes ainsi     enro-          bées    sont     parfois        relativement    peu stables     et    ne sup  portent pas un long stockage.  



  La présente     invention    a pour but de remédier à       cet        inconvénient    et d'améliorer en même temps les  propriétés de     brillant    et de compacité des cordons  de soudure.

   Elle a     pour    objet une     électrode    enrobée  pour da soudure à     l'arc        électrique    de     l'aluminium    et  de ses     alliages,        comprenant        une    âme en     aluminium     et/ou ses     alliages    et un     enrobage        composé,    au     moins     en     partie,

      d'un mélange     d'halogénures    de métaux     al-          calins        et    alcalino-terreux,     caractérisé    en ce qu'au  moins 15 0/o des     halogénures    que contient     l'enrobage     est sous     forme    de     fluorure    de potassium et     aluminium     répondant à la     formule        K3    Al Fo.  



  L'enrobage peut avantageusement     contenir     au     moins    40 0/o d'ions halogènes    au     moins    20 0/o de cations     alcalins    et alcalino-terreux  et  au     moins    3 0/o de cations du groupe de l'aluminium.       Plus        spécifiquement        il    serait avantageux que l'en  robage     contienne     
EMI0001.0079     
  
    au <SEP> moins <SEP> 15 <SEP> 0/o <SEP> d'ions <SEP> fluor
<tb>  au <SEP> moins <SEP> 12 <SEP> 0/o <SEP> d'ions <SEP> potassium
<tb>  au <SEP> moins <SEP> 2 <SEP> 0/o <SEP> d'ions <SEP> aluminium.

         A     titre        d'exemple,    on     peut        utiliser    avec de     bans     résultats     des    enrobages     contenant     
EMI0001.0087     
  
    17 <SEP> à <SEP> 2.3 <SEP> 0/o <SEP> d'ions <SEP> fluor
<tb>  25 <SEP> à <SEP> 40 <SEP> 0/o <SEP> d'ions <SEP> chlore
<tb>  2 <SEP> à <SEP> 7 <SEP> 0/o <SEP> d'ions <SEP> aluminium       reste: ions     alcalins    et alcalino-terreux, le 18 à  30 0/0 du tout étant sous forme de     K3    Al FO.  



  Une     petite        partie    du     K3    Al Fo pourrait être rem  placée par de la     cryolite        (Na3    Al     Fs).     



  Les électrodes     ainsi        enrobées    sont peu hygrosco  piques et relativement stables.     Elles        donnent    un cor  don de soudure     compact        et        brillant,        pratiquement     exempt de porosités, jouissant de     bonnes        propriétés     de     ténacité    et     d'élasticité.        Accessoirement,

      les élec  trodes selon l'invention peuvent encore être traitées  spécialement     contre        l'action        corrosive    que     certains     composants de     l'enrobage        pourraient    exercer sur     leur     âme     métallique.    A cet     effet,    on peut     incorporer    à  l'enrobage des     substances        anticorrosives    telles que,  par exemple, les chromates,

   ou encore traiter préala  blement l'âme     métallique    en     l'immergeant    dans un       bain        contenant,    par exemple, de l'acide     nitrique    ou  des ions chromates, etc.



  Coated Electrode for Arc Welding of Aluminum and Aluminum Alloys The present invention relates to a coated electrode for electric arc welding of aluminum and its alloys.



  To obtain a particularly shiny, impeccable weld bead by means of an electrode based on aluminum or an aluminum alloy, these electrodes are generally used in conjunction with fluxes capable of dissolving the liquid. aluminum oxide which forms during welding.

   The fluxes also have the task of stabilizing and ionizing the arc and of facilitating the removal of slag from the hard solder deposit. Semi-fluid, pasty or powdery mixtures of chlorides and fluorides of alkali metals and / or alkaline earth metals are generally used for this purpose.

    These mixtures generally exhibit a fairly pronounced hygroscopicity, so that when used in the form of coatings, the electrodes thus coated are sometimes relatively unstable and do not stand long storage.



  The object of the present invention is to remedy this drawback and at the same time to improve the gloss and compactness properties of the weld beads.

   It relates to a coated electrode for electric arc welding of aluminum and its alloys, comprising a core of aluminum and / or its alloys and a coating composed, at least in part,

      of a mixture of halides of alkali and alkaline earth metals, characterized in that at least 15 0 / o of the halides contained in the coating is in the form of potassium and aluminum fluoride corresponding to the formula K3 Al Fo.



  The coating can advantageously contain at least 40% of halogen ions, at least 20% of alkali and alkaline earth cations and at least 30% of cations from the aluminum group. More specifically, it would be advantageous for the packaging to contain
EMI0001.0079
  
    at <SEP> minus <SEP> 15 <SEP> 0 / o <SEP> of fluorine <SEP> ions
<tb> at <SEP> minus <SEP> 12 <SEP> 0 / o <SEP> of <SEP> potassium ions
<tb> at <SEP> minus <SEP> 2 <SEP> 0 / o <SEP> of <SEP> aluminum ions.

         By way of example, it is possible to use with good results coatings containing
EMI0001.0087
  
    17 <SEP> to <SEP> 2.3 <SEP> 0 / o <SEP> of fluorine <SEP> ions
<tb> 25 <SEP> to <SEP> 40 <SEP> 0 / o <SEP> of <SEP> chlorine ions
<tb> 2 <SEP> to <SEP> 7 <SEP> 0 / o <SEP> of <SEP> aluminum ions remains: alkali and alkaline earth ions, the 18 to 30 0/0 at all being in the form of K3 Al FO.



  A small part of the K3 Al Fo could be replaced by cryolite (Na3 Al Fs).



  The electrodes thus coated are not very hygroscopic and relatively stable. They give a compact and shiny solder horn, practically free of porosities, enjoying good properties of toughness and elasticity. Incidentally,

      the electrodes according to the invention can also be specially treated against the corrosive action that certain components of the coating could exert on their metal core. For this purpose, anticorrosive substances such as, for example, chromates, can be incorporated into the coating,

   or else treat the metal core beforehand by immersing it in a bath containing, for example, nitric acid or chromate ions, etc.

Claims (1)

REVENDICATION Electrode enrobée pour la soudure à l'arc de l'aluminium et de ses alliages comprenant une âme en aluminium et/ou alliage d'aluminium et un enro bage composé, au moins en partie, d'un mélange d'halogénures de métaux alcalins et alcalino-terreux, caractérisé en ce qu'au moins 15 0/o des halogénures que contient l'enrobage est sous forme de fluorure de potassium et d'aluminium répondant à :la formule K3 A1 F0. CLAIM Coated electrode for arc welding of aluminum and its alloys comprising an aluminum and / or aluminum alloy core and a coating composed, at least in part, of a mixture of metal halides alkali metal and alkaline earth metal, characterized in that at least 15 0 / o of the halides which the coating contains is in the form of potassium and aluminum fluoride corresponding to: the formula K3 A1 F0. SOUS-REVENDICATIONS 1. Electrode enrobée suivant la revendication, ca ractérisée en ce que son enrobage contient au moins 40 0/o d'ions halogènes au moins 200/o d'ions alcalins et alcalino-terreux et au moins 3 0/0 d'ions du groupe de l'aluminium. 2. Electrode enrobée suivant la revendication et la sous-revendication 1, caractérisée en ce que son enrobage contient au moins 15 0/o d'ions fluor au moins 12 0/o d'ions potassium et au moins 2 0/o d'ions aluminium. 3. SUB-CLAIMS 1. Coated electrode according to claim, characterized in that its coating contains at least 40 0 / o of halogen ions at least 200 / o of alkali and alkaline earth ions and at least 3 0/0 d ions of the aluminum group. 2. A coated electrode according to claim and sub-claim 1, characterized in that its coating contains at least 15 0 / o fluorine ions at least 12 0 / o potassium ions and at least 20 / o of aluminum ions. 3. Electrode enrobée suivant la revendication et les sous-revendications 1 et 2, caractérisée en ce que son enrobage contient 17 à 23 0/o d'ions fluor 25 à 40 0/o d'ions chlore 2 à 7 '0/o d'ions aluminium le reste : ions alcalins et alcalino-terreux, le 18 à 30 0/o du tout étant sous forme de K3 Al Fo. 4. Electrode enrobée suivant la revendication, caractérisée en ce que son :enrobage contient en outre au moins une substance anticorrosive, par exemple un chromate. Coated electrode according to claim and sub-claims 1 and 2, characterized in that its coating contains 17 to 23 0 / o fluorine ions 25 to 40 0 / o chlorine ions 2 to 7 '0 / o aluminum ions the rest: alkaline and alkaline earth ions, the 18 to 30 0 / o of the whole being in the form of K3 Al Fo. 4. Coated electrode according to claim, characterized in that its: coating further contains at least one anticorrosive substance, for example a chromate.
CH223863A 1963-02-21 1963-02-21 Coated electrode for arc welding of aluminum and aluminum alloys CH405533A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
CH223863A CH405533A (en) 1963-02-21 1963-02-21 Coated electrode for arc welding of aluminum and aluminum alloys
NL6401482A NL6401482A (en) 1963-02-21 1964-02-18
DE1964S0089588 DE1483481A1 (en) 1963-02-21 1964-02-19 Encapsulated electrode for arc welding aluminum and aluminum alloys
FR20475A FR1383442A (en) 1963-02-21 1964-02-19 Improvements made to coated electrodes for arc welding of aluminum and its alloys
SE208064A SE321750B (en) 1963-02-21 1964-02-20
BE644150A BE644150A (en) 1963-02-21 1964-02-21

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH223863A CH405533A (en) 1963-02-21 1963-02-21 Coated electrode for arc welding of aluminum and aluminum alloys

Publications (1)

Publication Number Publication Date
CH405533A true CH405533A (en) 1966-01-15

Family

ID=4229075

Family Applications (1)

Application Number Title Priority Date Filing Date
CH223863A CH405533A (en) 1963-02-21 1963-02-21 Coated electrode for arc welding of aluminum and aluminum alloys

Country Status (6)

Country Link
BE (1) BE644150A (en)
CH (1) CH405533A (en)
DE (1) DE1483481A1 (en)
FR (1) FR1383442A (en)
NL (1) NL6401482A (en)
SE (1) SE321750B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4358485A (en) * 1980-03-17 1982-11-09 Union Carbide Corporation Method for forming a porous aluminum layer

Also Published As

Publication number Publication date
DE1483481A1 (en) 1969-10-09
SE321750B (en) 1970-03-16
FR1383442A (en) 1964-12-24
NL6401482A (en) 1964-08-24
BE644150A (en) 1964-06-15

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